WO2018205493A1

WO2018205493A1 - Graphic drawing method, apparatus and device

Info

Publication number: WO2018205493A1
Application number: PCT/CN2017/104850
Authority: WO
Inventors: 叶洪
Original assignee: 广州视源电子科技股份有限公司; 广州视睿电子科技有限公司
Priority date: 2017-05-11
Filing date: 2017-09-30
Publication date: 2018-11-15
Also published as: CN107230239A

Abstract

A graphic drawing method, apparatus and device. The method comprises: acquiring a first point coordinate, and acquiring a second point coordinate (201); taking the first point coordinate and the second point coordinate as the coordinates of a pair of diagonal vertices, and combining a pre-set first angle and second angle to draw a target face of a cuboid graphic (202), wherein the second angle is an angle between two adjacent sides in a pre-set face in a pre-set standard cuboid graphic, and the first angle is an angle between a side of the pre-set face and an axis of a pre-set two-dimensional coordinate system in the two-dimensional plane; acquiring a third point coordinate (203); and drawing other faces of the cuboid graphic based on the second point coordinates, the third point coordinate, and a pre-set drawing direction (204), wherein the pre-set drawing direction is a direction of an edge, connected to the pre-set face, of the standard cuboid graphic. A cuboid graphic expected by a user can be drawn accurately in response to a drawing instruction, so as to improve the accuracy of drawing the cuboid graphic.

Description

Graphic drawing method, device and device

Technical field

The present invention relates to the field of graphics technology, and in particular, to a graphics rendering method, apparatus, and device.

Background technique

At present, in teaching, drawing and other scenes, it is often involved in drawing a rectangular parallelepiped graphic. The rectangular parallelepiped is a straight prism with a rectangular bottom surface. A cube (also called a cube) is a special cuboid, and a cube is a rectangular parallelepiped with six faces being square. A rectangular parallelepiped graphic is a graphic used to represent a rectangular parallelepiped in a two-dimensional plane. For example, the rectangular parallelepiped graphic may be a graphic formed by projecting a rectangular parallelepiped onto a two-dimensional plane according to a specified projection relationship, and the same rectangular parallelepiped may be different in projection onto a two-dimensional plane according to different projection relationships. Taking teaching as an example, in the teaching process, the teacher needs to display the rectangular figure to the students, and then the drawing software can be used for graphic drawing. In the drawing software, a rectangular parallelepiped sample can be pre-stored, and a rectangular parallelepiped pattern can be obtained by dragging a rectangular parallelepiped sample from the toolbar of the drawing software according to a user operation instruction and performing position and size adjustment. For another example, a two-point method can be used to draw a rectangular parallelepiped figure, as shown in FIG. 1. FIG. 1 is a schematic diagram of drawing a rectangular parallelepiped figure by a two-point method in the related art. According to the user operation instruction, two coordinate points are determined on the screen: P1 and P2, the two coordinate points are used as diagonal vertices, and the other two vertex coordinates are determined based on the preset rule, and the size of the rectangular figure to be drawn is obtained. Rectangular P1P4P2P3. Pushing a rectangular parallelepiped figure according to the determined rectangle, the rectangular parallelepiped figure is in the rectangle P1P4P2P3, thereby realizing the drawing of the rectangular parallelepiped figure,

It can be seen that the above method has poor response to the operation instruction, and the rectangular parallelepiped figure drawn according to the operation instruction has a gap with the rectangular parallelepiped figure that the user expects to draw, resulting in low accuracy of the drawn rectangular parallelepiped figure.

Summary of the invention

Based on this, the present invention provides a method, device and device for drawing graphics.

According to a first aspect of the embodiments of the present invention, a graphics rendering method is provided, the method comprising:

Obtaining the coordinates of the first point; acquiring the coordinates of the second point; acquiring the coordinates of the third point;

Taking the first point coordinate and the second point coordinate as coordinates of a pair of diagonal vertices, and combining the preset first angle and the first a second angle is a target surface of the rectangular parallelepiped pattern, wherein the second angle is an angle between two adjacent sides in the preset surface in the preset standard rectangular parallelepiped image, and the first angle is the preset surface The angle between an edge and an axis of a preset two-dimensional coordinate system in a two-dimensional plane;

And drawing other faces of the cuboid figure based on the second point coordinates, the third point coordinates, and a preset drawing direction, where the preset drawing direction is an edge connected to the preset surface in the standard cuboid figure The direction.

Optionally, the standard cuboid image is a projection image that projects a standard cuboid onto a two-dimensional plane according to a specified projection relationship, and the first angle, the second angle, and the preset drawing direction are obtained according to the specified projection relationship. The specified projection relationship includes a placement angle of the standard cuboid, a distance between the standard cuboid and the projection device, a projection direction, and a projection manner.

Optionally, the steps of obtaining the first angle, the second angle, and the preset drawing direction include:

Obtaining three-dimensional coordinates of each vertex of the standard cuboid when projecting a standard cuboid from a three-dimensional space to a two-dimensional plane according to a specified projection relationship;

And transforming the three-dimensional coordinates of each vertex into two-dimensional coordinates of the corresponding vertex on a preset two-dimensional coordinate system according to the projection matrix of the three-dimensional space to the two-dimensional plane in the specified projection relationship, and determining the two-dimensional plane according to the two-dimensional coordinates Standard cuboid in the middle;

Determining an edge of the preset surface in the standard cuboid image with an axis of the predetermined two-dimensional coordinate system as a first angle, and clamping the two adjacent sides of the preset surface The angle is determined to be a second angle, and a direction of an edge of the standard cuboid map connected to the preset surface is determined as the preset drawing direction.

Optionally, the drawing the target angle of the rectangular parallelepiped figure by combining the preset first angle and the second angle comprises:

Obtaining a new two-dimensional coordinate system, the new two-dimensional coordinate system is the same as the origin of the preset two-dimensional coordinate system, and the angle between the new two-dimensional coordinate system and the corresponding axis of the preset two-dimensional coordinate system is First angle;

Based on the transformation matrix of the preset two-dimensional coordinate system to the new two-dimensional coordinate system, the first point coordinate and the second point coordinate in the preset two-dimensional coordinate system are transformed into a new two-dimensional coordinate system to obtain a new two-dimensional coordinate system. The first point of the new coordinate and the second point of the new coordinate;

Determining coordinates of another pair of diagonal vertices in a new two-dimensional coordinate system according to the first point new coordinate, the second point new coordinate, and the preset second angle;

The target surface of the cuboid graphic is drawn according to the coordinates of the two pairs of diagonal vertices.

Optionally, the method further includes:

Determining, according to the length, width, and height of the standard cuboid, the length, width, and height of the standard cuboid;

Determining, according to coordinates of each vertex in the rectangular parallelepiped figure, length, width, and height of the rectangular parallelepiped graphic;

The length, width, and height of the rectangular parallelepiped corresponding to the cuboid figure are determined by using the correspondence relationship and the length, width, and height of the cuboid figure, and the determined length, width, and height are input to the three-dimensional drawing engine.

According to a second aspect of the embodiments of the present invention, a graphics rendering apparatus is provided, the apparatus comprising:

a coordinate acquiring module, configured to acquire a first point coordinate; acquire a second point coordinate; and acquire a third point coordinate;

a graphic drawing module, configured to use the first point coordinate and the second point coordinate as coordinates of a pair of diagonal vertices, and draw a target surface of the rectangular parallelepiped figure according to the preset first angle and the second angle, based on Depicting the second point coordinate, the third point coordinate, and the preset drawing direction, and drawing other faces of the rectangular parallelepiped graphic;

The second angle is an angle between two adjacent sides in the preset surface in the preset standard rectangular parallelepiped, and the first angle is one of the preset surface and the two-dimensional plane An angle of one axis of the two-dimensional coordinate system is set, and the preset drawing direction is a direction of an edge of the standard rectangular parallelepiped that is connected to the preset surface.

Optionally, the device further includes a parameter determining module, configured to:

Optionally, the device further includes:

a three-dimensional size determining module, configured to determine a length, a width, and a height of the standard cuboid, respectively corresponding to a length, a width, and a height of the standard cuboid figure; determining the cuboid according to coordinates of each vertex in the cuboid figure Length, width, and height of the graphic; determining the length, width, and height of the rectangular parallelepiped corresponding to the rectangular parallelepiped figure by using the correspondence relationship and the length, width, and height of the rectangular parallelepiped graphic;

An information transmission module for inputting the determined length, width, and height into the three-dimensional drawing engine.

According to a third aspect of the embodiments of the present invention, an electronic device is provided, including:

processor;

a memory for storing processor executable instructions;

Wherein the processor is configured to:

Taking the first point coordinate and the second point coordinate as coordinates of a pair of diagonal vertices, and combining the preset first angle and the second angle to draw a target surface of the rectangular parallelepiped, the second angle is pre The angle between two adjacent sides in the preset surface in the standard rectangular parallelepiped image, the first angle is a clip of one side of the preset surface and one axis of the preset two-dimensional coordinate system in the two-dimensional plane angle;

Applying the scheme of the embodiment of the present invention, one side of the rectangular parallelepiped graphic is drawn by two points, and the other five faces of the rectangular parallelepiped graphic are drawn by the third point, thereby realizing the drawing of the rectangular parallelepiped graphic, because the user can control the length of the rectangular parallelepiped figure through two points. Wide, the height of the cuboid graphic is controlled by the third point, so the drawing instruction can be accurately responded, and the rectangular parallelepiped figure that the user desires to draw can be drawn, thereby improving the accuracy of drawing the rectangular parallelepiped figure.

The above general description and the following detailed description are intended to be illustrative and not restrictive.

DRAWINGS

The accompanying drawings, which are incorporated in the specification of FIG

FIG. 1 is a schematic diagram of drawing a rectangular parallelepiped figure using a two-point method in the related art.

2A is a flow chart of a graphics rendering method according to an exemplary embodiment of the present invention.

FIG. 2B is a schematic diagram of drawing a diagram according to an exemplary embodiment of the present invention.

2C is a schematic diagram of a sample data set according to an exemplary embodiment of the present invention.

FIG. 2D is a schematic diagram of determining diagonal vertex coordinates according to an exemplary embodiment of the present invention.

FIG. 2E is a schematic diagram showing another drawing of the present invention according to an exemplary embodiment.

FIG. 2F is another schematic diagram of drawing according to an exemplary embodiment of the present invention.

FIG. 3 is a flow chart of another method of drawing graphics according to an exemplary embodiment of the present invention.

FIG. 4 is a block diagram of a graphics rendering apparatus according to an exemplary embodiment of the present invention.

FIG. 5 is a block diagram of an apparatus for graphics rendering, in accordance with an exemplary embodiment of the present invention.

detailed description

Exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. The following description refers to the same or similar elements in the different figures unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Instead, they are merely examples of devices and methods consistent with aspects of the invention as detailed in the appended claims.

The terminology used in the present invention is for the purpose of describing particular embodiments, and is not intended to limit the invention. The singular forms "a", "the" and "the" It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

It should be understood that although the terms first, second, third, etc. may be used to describe various information in the present invention, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, the first information may also be referred to as the second information without departing from the scope of the invention. Similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "when" or "when" or "in response to a determination."

As shown in FIG. 1, the P1 point and the P2 point are determined on the screen according to the user operation instruction, the two coordinate points are used as a pair of diagonal vertices, and the other two vertex coordinates P3 and P4 are determined based on the preset rule. A rectangle P1P4P2P3 for defining the size of the cuboid pattern to be drawn is obtained. A rectangular parallelepiped figure is inversely pushed according to the determined rectangle, and the six vertices of the rectangular parallelepiped figure are on the side of the rectangle P1P4P2P3, thereby realizing the drawing of the rectangular parallelepiped figure. It can be seen that when the user specifies the P1 and P2 points, the user can see the cuboid figure drawn by the drawing, and the user can not draw the desired cuboid figure by controlling the two points very well, that is, the cuboid figure and the user drawn by the two-point method. It is expected that the drawn rectangular parallelepiped pattern has a gap, resulting in a low accuracy of the drawn rectangular parallelepiped pattern. When the gap is large, the user needs to delete and then re-draw, resulting in low drawing efficiency.

Based on this, in order to avoid the defect that the drawn rectangular parallelepiped pattern has low accuracy, the present invention provides a graphic drawing method. You can draw a face of the cuboid figure through two points and draw the other five faces of the cuboid figure through the third point to realize the drawing of the cuboid figure. Since the user can control the length and width of the cuboid figure through two points, pass the third The point controls the height of the cuboid graphic, so it can actively respond to the drawing instruction, draw the rectangular parallelepiped figure that the user desires to draw, and thereby improve the accuracy of drawing the rectangular parallelepiped figure. Next, the solution of the present invention will be described in detail.

The embodiment of the present invention can be applied to a smart device, and the smart device can be a smart whiteboard, a smart phone, a smart learning machine, a tablet computer, a PDA (Personal Digital Assistant), or a PC (Personal Computer). Functional electronic device. The user can use the finger or the stylus pen to draw the graphic on the touch screen of the smart device, or use the mouse to control the cursor on the screen of the smart device for graphic drawing, and the smart device can receive the drawing instruction generated by the user operation, and according to the drawing instruction. Determine the three-point coordinates and then draw the graph.

Wherein, regarding the order of coordinate point acquisition and graphic drawing, after acquiring the first point coordinate, the second point coordinate, and the third point coordinate, all the faces of the rectangular parallelepiped graphic may be drawn; or the first point coordinate may be obtained. After the coordinates of the second point, the target surface of the rectangular figure is drawn first, then the coordinates of the third point are obtained, and the other faces of the rectangular figure are drawn. The following is exemplified in conjunction with the drawings.

As shown in FIG. 2A, FIG. 2A is a flowchart of a graphic drawing method according to an exemplary embodiment of the present invention, which includes the following steps 201 to 204:

In step 201, the first point coordinates are acquired; the second point coordinates are acquired;

In step 202, the first point coordinate and the second point coordinate are used as coordinates of a pair of diagonal vertices, and the target face of the rectangular parallelepiped figure is drawn in combination with the preset first angle and the second angle, the first The two angles are the angles of two adjacent sides in the preset surface in the preset standard rectangular parallelepiped, and the first angle is a preset two-dimensional coordinate system in one of the preset surfaces and the two-dimensional plane The angle of one axis;

In step 203, acquiring third point coordinates;

In step 204, other faces of the cuboid figure are drawn based on the second point coordinates, the third point coordinates, and a preset drawing direction, where the preset drawing direction is in the standard cuboid figure and Set the direction of the edges of the faces.

Regarding the determination of the point coordinates, in one example, the three point coordinates are determined by the click position corresponding to the click command. The click command may be a mouse click command, a finger click command, or a touch pen click command. The user can click on three discontinuous points respectively, and the device determines three discontinuous points as the first point, the second point, and the third point according to the order of clicking. For example, according to the first click instruction, the first point coordinate is obtained, and according to the second click instruction, the second point coordinate is obtained, and according to the third click instruction, the third point coordinate is obtained.

Although the above method can determine the cuboid figure through three points, in the drawing process, the first point coordinates, the second point The coordinates and the coordinates of the third point are directly determined by the click operation, and after the first point coordinate and the second point coordinate are determined, the length and width of the cuboid figure cannot be modified, and after the third point coordinate is determined, the cuboid cannot be modified. In order to overcome such a defect, the embodiment of the present invention further provides another implementation manner, which can dynamically adjust the second point coordinate to dynamically adjust the length and width of the rectangular figure, and when receiving the second confirmation command The coordinates at this time are taken as the final second point coordinates to achieve the final confirmation of the length and width. In addition, the third point coordinate can be dynamically adjusted to dynamically adjust the height in the cuboid image. When the third point confirmation command is received, the coordinate at this time is used as the final third point coordinate to achieve high final confirmation. .

In this implementation manner, a rectangular parallelepiped graphic can be drawn by dragging (tracting, sliding, moving). In the drawing process, the point that the user first triggers is taken as the first point, thereby obtaining the first point coordinate. The first point is used as a starting point for sliding, and any point in the sliding track can be used as the second point. According to the first point and the current second point, the target surface is drawn. As the coordinate of the second point changes continuously, the target surface also changes. By adjusting the coordinates of the second point, the target surface desired by the user can be drawn. When the second confirmation command is received, the coordinates at this time are taken as the final second point coordinates to achieve the final confirmation of the length and width. The second confirmation command may be a mouse click command, a finger/touch pen click command, or a press command. Similarly, the second point is used as the starting point for sliding, and any point in the sliding track can be used as the third point. According to the target surface and the third point, the other five faces are drawn. As the coordinate of the third point changes continuously, the other five faces also change. By adjusting the coordinates of the third point, the user's desired height can be drawn, thereby Obtain the desired cuboid graphic.

FIG. 2B is a schematic diagram showing a drawing of the present invention according to an exemplary embodiment. The first point (P1 point) to the final second point (P2 point), and the final second point to the final third point (P3 point), the displayed figure shows a dynamic effect, each change the coordinates of the second point The target faces are redrawn, and the other five faces are redrawn each time the coordinates of the third point are changed. After the target surface is determined, by moving the third point, a dynamic effect of stretching the target surface in the preset drawing direction according to the distance between the second point and the third point can be presented.

For convenience of illustration, FIG. 2B only exemplifies five states in the drawing process. During the drawing process, the first point clicked by the user is taken as the first point (P1 point), and the P1 point is used as the starting point for dragging. Any point in the dragging track is the second point, and the dynamics are dynamic for each second point. The corresponding target surface is drawn, and FIG. 2B is exemplified by taking the P2' point in the drag track as an example, and the target surface shown in the second state in FIG. 2B is obtained according to P1 and P2' drawing. When dragging to the P2 point, if a confirmation command is received, the point is determined as the final second point, and the final target surface is drawn to be obtained, as shown by state three in FIG. 2B. Then, dragging with the second point as the starting point, any point in the dragging track is the third point, and the other five faces of the corresponding rectangular parallelepiped graphic are dynamically drawn for each third point, and FIG. 2B is dragged in the track. The P3' point is exemplified as an example, and a rectangular parallelepiped chart as shown in state four in Fig. 2B is obtained according to the target plane and the P3' point drawing shown in the state three. When dragging to the P3 point, if a confirmation command is received, the point is determined as the final third point, and the final cuboid figure is drawn. As shown in state 5 in Figure 2B.

Next, we will introduce the drawing of the cuboid figure based on three points.

First, the first angle, the second angle, and the preset drawing direction are introduced.

The second angle is an angle between two adjacent sides in the preset surface in the preset standard rectangular parallelepiped image, and the first angle is an axis of the preset surface and an axis of the preset two-dimensional coordinate system in the two-dimensional plane The angle of the preset drawing is the direction of the edge of the standard cuboid image connected to the preset surface. The preset surface is one side of the standard rectangular parallelepiped image, for example, it may be any one of the top surface, the bottom surface, and the side surface in the standard rectangular parallelepiped image. In order to adapt to the user's drawing habits, the preset surface is the top surface in the standard cuboid image. The direction of the rib is the direction of the line where the rib is located. In the embodiment of the present invention, according to the first angle, the second angle, and the preset drawing direction in the standard rectangular parallelepiped drawing, it is desirable to realize the angle between an adjacent side of the target plane of the drawn rectangular parallelepiped figure as the second clip. The angle between the edge of the target surface and the axis of the preset two-dimensional coordinate system in the two-dimensional plane is the first angle, and the direction of the edge adjacent to the target surface in the rectangular parallelepiped pattern is the preset drawing direction.

As shown in FIG. 2C, FIG. 2C is a schematic diagram of a sample data set according to an exemplary embodiment of the present invention. The sample data set includes a first angle, a second angle, and a preset drawing direction. In the schematic diagram, the vertex O in the standard cuboid map coincides with the origin in the two-dimensional coordinate system, the angle α between OC and OX is the first angle, and the angle β between AO and AB is the second angle, BD The two directions of the line are the preset drawing directions.

In this embodiment, according to the obtained first point coordinate, the second point coordinate, and the third point coordinate, and combined with the first angle, the second angle, and the preset drawing direction of the standard rectangular parallelepiped, the standard rectangular parallelepiped may be drawn. Cuboid graphics.

The rectangular parallelepiped graphic is a graphic drawn on a two-dimensional plane. In order to make the rectangular parallelepiped graphic realistic, a graphic formed by projecting a rectangular parallelepiped onto a two-dimensional plane according to a specified projection relationship may be used as a rectangular parallelepiped graphic. Based on this, in one example, the standard cuboid map is a projection graph that projects a standard cuboid onto a two-dimensional plane according to a specified projection relationship, and the first angle, the second angle, and the preset drawing direction are based on the Specifies the projection relationship to get. The preset drawing direction includes the placement angle of the rectangular parallelepiped, the distance between the rectangular parallelepiped and the projection device, the projection direction, and the projection manner. The projection device can be a device such as a camera. Projection methods include orthogonal projection. The projection direction includes projection toward the XOY plane, projection toward the XOZ plane, projection onto the YOZ plane, and the like, and is not limited herein.

Since the projection relationship of the rectangular parallelepiped projection onto the two-dimensional plane is fixed, the first angle, the second angle, and the preset drawing direction of the rectangular parallelepiped formed by the rectangular parallelepiped projection onto the two-dimensional plane, regardless of the change in the size of the rectangular parallelepiped. stable. Therefore, using the first angle, the second angle, and the preset drawing direction in the standard rectangular parallelepiped graphic, and the first point coordinate, the second point coordinate, and the third point coordinate obtained during the drawing process, the standard rectangular parallelepiped can be drawn. The rectangular parallelepiped graphics with the same projection relationship, the length, width and height of the rectangular parallelepiped graphics are based on the first point coordinates, the second point coordinates, and the third point coordinates. Change to improve the authenticity of the rectangular figure. Among them, the length, width and height of the rectangular figure are the lengths of three different sides in the two-dimensional figure.

In this embodiment, at least one sample data group of the projection relationship may be pre-stored, and the sample data group includes a first angle, a second angle, and a preset drawing direction in the same projection relationship.

In an optional implementation manner, a sample data set of a projection relationship is fixedly stored, and each time the graphic is drawn, the parameters in the sample data set are used for drawing.

In another optional implementation, a sample data set corresponding to multiple projection relationships may be stored. Determine the sample data set before drawing the box. For example, based on the projection relationship setting interface, receiving a projection relationship setting instruction, determining a projection relationship according to the projection relationship setting instruction, thereby determining a corresponding sample data group, and then performing a rectangular parallelepiped graphic drawing according to the determined sample data group. In the setting interface, the projection relationship can be directly described by text, or the standard rectangular parallelepiped corresponding to each projection relationship can be prompted, so that the user can view the display effect of each projection relationship, thereby quickly setting the projection relationship.

The embodiment of the invention further provides a method for generating a first angle, a second angle and a preset drawing direction, the method comprising the following steps:

In this embodiment, the standard cuboid is a pre-set cuboid used as a reference. In one example, the standard cuboid may be a cube having a three-dimensional size of X ₀ = Y ₀ = Z ₀ =1. Under the specified projection relationship, the three-dimensional coordinates of the vertices of the standard cuboid in the three-dimensional coordinate system under the specified projection relationship can be obtained by keeping the placement angle of the standard cuboid, the distance between the standard cuboid and the projection device, the projection direction, and the projection mode. Because of known relationships specify a projection, it is possible to obtain three-dimensional space to two-dimensional plane of the projection matrix Mp, based on a specified projection relationship corresponding projection matrix, using the formula P = P _D * Mp _dimensional calculation of the standard two-dimensional plane at each vertex of a rectangular parallelepiped Projection coordinates. Taking FIG. 2C as an example, after obtaining the two-dimensional coordinates of the vertices O, A, B, C, and D, according to the vector product formula, it can be known that:

AO·AB=|AO||AB|·cosβ

Thereby a second angle β can be obtained:

Similarly, the first angle α can be obtained:

The coordinate of X can be taken as (1, 0).

In addition, a direction of an edge of the standard cuboid connected to the surface is determined as the preset drawing direction, for example, a direction of a line where the BD is located is determined as a preset drawing direction, and the preset drawing direction may include a vector.

Direction and vector

The direction.

Then, after obtaining the first angle, the second angle, and the preset drawing direction, the graphic drawing can be performed. In the drawing process, the first point coordinate and the second point coordinate are used as coordinates of a pair of diagonal vertices, and the target surface of the rectangular parallelepiped graphic is drawn in combination with the preset first angle and the second angle, including:

Taking the first point coordinate and the second point coordinate as coordinates of a pair of diagonal vertices, and determining coordinates of another pair of diagonal vertices in combination with the preset first angle and the second angle;

The angle between an edge of the target surface and the axis of the preset two-dimensional coordinate system is the first angle, and the angle between two adjacent edges of the target surface is the second clamp. angle. In the two-dimensional plane, it is known that the angle between one edge of the target surface and one axis in the two-dimensional coordinate system, the angle between adjacent edges in the target surface, and the two vertices in the target surface can obtain the target according to the triangular relationship. The coordinates of another pair of diagonal vertices in the face.

In one example, in order to improve computational efficiency, the combination of the preset first angle and the second angle determine coordinates of another pair of diagonal vertices, including:

And determining coordinates of another pair of diagonal vertices in the new two-dimensional coordinate system according to the first point new coordinate, the second point new coordinate, and the preset second angle.

In this embodiment, the preset two-dimensional coordinate system may be referred to as a original two-dimensional coordinate system, and the new two-dimensional coordinate system may be a pre-established two-dimensional coordinate system, or may be a two-dimensional coordinate system established when receiving a drawing instruction. . The angle between the new two-dimensional coordinate system and the corresponding axis of the preset two-dimensional coordinate system is the first angle, so that one of the axes of the new two-dimensional coordinate system is on the same line as one edge of the target surface. Up, thereby improving the efficiency of determining the coordinates of another pair of diagonal vertices. The angle between the corresponding axes is the first angle, that is, the angle between the X-axis of the new two-dimensional coordinate system and the X-axis of the preset two-dimensional coordinate system is the first angle, and the new two-dimensional coordinate system Y-axis and the preset two-dimensional The angle between the Y-axis of the coordinate system is the first angle. It can be understood that if the first angle is zero, it is not necessary to establish a new two-dimensional coordinate system.

Since the angle between the new two-dimensional coordinate system x'oy' and the preset two-dimensional coordinate system xoy is the first angle α, the mapping relationship between the coordinate system x'oy' and xoy can be calculated according to the alpha value, as follows:

The transformation matrix of the coordinate system xoy to the coordinate system x'oy' is:

The transformation matrix of the coordinate system x'oy' to the coordinate system xoy is:

Based on the transformation matrix of the preset two-dimensional coordinate system to the new two-dimensional coordinate system, the first point coordinate and the second point coordinate can be transformed into a new two-dimensional coordinate system to obtain the first point new coordinate and the new two-dimensional coordinate system. The second point is a new coordinate, and the coordinates of the other pair of diagonal vertices in the new two-dimensional coordinate system are determined according to the first point new coordinate, the second point new coordinate, and the preset second angle.

Regarding the target plane of the cuboid graph based on the coordinates of the two pairs of diagonal vertices, in one example, after determining the coordinates of the other pair of diagonal vertices in the new two-dimensional coordinate system, the two pairs of diagonal vertices may be based on the new two The coordinates in the dimension coordinate system draw the target surface.

In another example, the coordinates of another pair of diagonal vertices obtained may be transformed into a preset two-dimensional coordinate system based on a transformation matrix of the new two-dimensional coordinate system to a preset two-dimensional coordinate system, and another pair is obtained. The coordinates of the angular vertices in the preset two-dimensional coordinate system, and the target surface is drawn based on the coordinates of the two pairs of diagonal vertices in the preset two-dimensional coordinate system.

For convenience of understanding, the present embodiment is illustrated by taking FIG. 2D as an example. FIG. 2D is a schematic diagram of determining diagonal vertex coordinates according to an exemplary embodiment of the present invention. In the figure, a preset two-dimensional coordinate system xoy, a new two-dimensional coordinate system x'oy', and a target surface A'OC'B' are included. The new two-dimensional coordinate system x'oy' is the same as the origin of the preset two-dimensional coordinate system xoy, and the X-axis of the new two-dimensional coordinate system x'oy' is the same as the OC' edge of the target surface A'OC'B' On the straight line, the first point coordinate P1 and the second point coordinate P2 are taken as coordinates of a pair of diagonal vertices O and B'. Further, in order to improve the calculation efficiency, the first point coordinate P1 coincides with the origin of the preset two-dimensional coordinate system xoy and the new two-dimensional coordinate system x'oy'.

In the drawing process, the coordinates of the P1 point and the coordinates of the P2 point are obtained, and the coordinates of the P1 point and the coordinates of the P2 point are taken as the coordinates of a pair of diagonal vertices O and B', and may pass P _{x 'oy'} = P _Xoy *Mo transforms the two points P1 and P2 into the x'oy' coordinate system, obtaining the first point new coordinate P1' and the second point new coordinate P2', and in the x'oy' coordinate system, combining the second angle The beta value calculates the coordinates of A' and C' in the x'oy' coordinate system. In the x'oy' coordinate system, the coordinates of A' and C' are as follows:

A'=[P1'.X-(P2'.Y-P1'.Y)*cotβ,P2'.Y]

C'=[P1'.X+(P2'.X-A'.X), P1'.Y]

Where P1'.X-(P2'.Y-P1'.Y)*cotβ represents the abscissa of A', P2'.Y represents the ordinate of A', P1'.X+(P2'.X-A' .X) denotes the abscissa of C', P1'.Y denotes the ordinate of C', P1'.X denotes the abscissa of P1, P1'.Y denotes the ordinate of P1, and P2'.X denotes the abscissa of P2 , P2'.Y represents the ordinate of P2, and A'.X represents the abscissa of A'. Since the first point new coordinate P1' and the second point new coordinate P2', and β have been determined, the coordinates of A' and C' can be obtained.

After determining the target surface, the third point coordinate may be acquired, and the other four vertex coordinates are determined based on the second point coordinate, the third point coordinate, and the preset drawing direction, and the other faces of the cuboid figure are drawn according to the obtained coordinates.

Since the projection relationship is determined, the first angle, the second angle, and the preset drawing direction are fixed. Therefore, after the target surface is determined, the edge adjacent to the target surface extends in the preset drawing direction. The preset drawing direction may include two directions of a straight line, and the preset drawing direction may be determined according to the moving direction of the third point relative to the second point. For example, a direction in which the angle between the two directions and the moving direction is less than 90 degrees is selected as the currently required preset drawing direction.

According to the projection distance of the second point coordinate and the third point coordinate in the preset drawing direction, the height of the rectangular figure can be determined, and the four vertices in the target direction, the height, and the target surface are calculated according to the preset, and the other four vertices are calculated. The coordinates are drawn, and other faces are drawn according to the obtained vertex coordinates and the coordinates of the four vertices in the target face, thereby obtaining a rectangular parallelepiped chart.

Since the preset drawing direction is fixed in the case where the projection relationship is determined, regardless of whether the direction of the second point to the third point is consistent with the preset drawing direction, when drawing the edge adjacent to the target surface in the rectangular parallelepiped pattern, Drawing by default Draw to. FIG. 2B illustrates an example in which the moving direction of P2 to P3 is consistent with the preset drawing direction.

FIG. 2E is a schematic diagram showing another drawing according to an exemplary embodiment of the present invention. FIG. 2E illustrates an example in which the moving direction of P2 to P3 is inconsistent with the preset drawing direction. In this diagram, the direction of mouse drag is P1 to P2, P2 to P3. During the process from P1 to P2, several target faces can be drawn. If a confirmation command is received at point P2, the target surface drawn at this time is taken as the final target surface. Since the preset drawing direction includes the positive direction and the negative direction of the y-axis, and since the moving direction of the mouse is P2 to P3, the angle between the P2P3 and the negative direction of the y-axis is less than 90 degrees, and therefore, the preset drawing direction is the y-axis. In the negative direction, the lengths of P2 and D' can be determined according to the distance between P2 and P3, and the coordinates of the other four vertices D', E', F', G' are obtained, and according to the obtained vertex coordinates and the target surface The other coordinates of the vertex coordinates are drawn to obtain a rectangular parallelepiped graphic.

In the related art, a non-rotatable rectangular parallelepiped graphic is often drawn by a two-dimensional drawing engine, for example, by a two-point method; a rectangular parallelepiped graphic can also be drawn by a three-dimensional drawing engine, for example, a user manually inputs a length, a height, and a height of a rectangular parallelepiped, and a three-dimensional drawing. The engine can draw the corresponding cuboid and support the rotation function. It can be understood that the two-dimensional drawing engine and the three-dimensional drawing engine draw a picture as a two-dimensional plan. The 2D drawing engine draws a rectangular parallelepiped graphic with a fixed projection relationship and therefore cannot be rotated. Since the three-dimensional size of the input three-dimensional drawing engine is the actual size of the rectangular parallelepiped, the three-dimensional drawing engine can draw a rectangular parallelepiped figure under different projection relationships according to the rotation instruction. The length, width, and height of the cuboid graphic drawn by the 3D drawing engine are the lengths of three different sides in the drawing.

However, the two-dimensional drawing engine and the three-dimensional drawing engine are used independently. After the rectangular parallelepiped drawing is drawn by the two-dimensional drawing engine, the three-dimensional drawing engine is used to display the rectangular parallelepiped figure of the actual rectangular parallelepiped corresponding to the rectangular parallelepiped in different projection relationships. Users can only draw with the 2D drawing engine and 3D drawing engine respectively, which has low drawing efficiency and poor user experience.

To this end, an embodiment of the present invention further provides a method for determining an actual size of a rectangular parallelepiped according to a rectangular parallelepiped pattern, the method comprising the following steps:

Determining a length, a width, and a height of the rectangular parallelepiped graphic according to coordinates of each vertex in the rectangular parallelepiped graphic;

The standard rectangular parallelepiped graphic is a graphic formed by projecting a standard rectangular parallelepiped onto a two-dimensional plane according to a specified projection relationship. The length, width, and height of a standard cuboid are the actual length, width, and height. The length, width, and height of a standard cuboid is the length of three different sides in the graph. The length, width, and height of a standard cuboid pattern formed by projecting a standard cuboid onto a two-dimensional plane in different projection relationships may be different. Therefore, the 3D drawing engine needs to know the actual length, width and height of the standard cuboid to draw standard cuboid graphics in different projection relationships.

The length, width, and height of the standard cuboid are known during the generation of the first angle, the second angle, and the preset drawing direction. For example, the three-dimensional size of the standard cuboid can be set to X ₀ =Y ₀ =Z ₀ = 1. Moreover, since the vertices of the standard cuboid pattern formed by projecting the standard cuboid onto the two-dimensional plane according to the specified projection relationship have been determined, the length, width, and height of the standard cuboid map can be obtained. For example, the length is OC, the width is OA, and the height is BD. Therefore, the length, width, and height of the standard cuboid can be determined, respectively, corresponding to the length, width, and height of the standard cuboid. In addition, according to the coordinates of the vertices of the rectangular parallelepiped in the two-dimensional plane, the length, width, and height of the rectangular parallelepiped figure can be determined, for example, the length is OC', the width is OA', the height is B'D', and the correspondence and the rectangular parallelepiped figure are utilized. The length, width, and height of the cuboid are determined by the length, width, and height of the cuboid, and the determined length, width, and height are input into the three-dimensional drawing engine, so that the cuboid graphics under different projection relationships can be drawn by the three-dimensional drawing engine. .

Taking FIG. 2E as an example, assume that the length, width, and height of the standard rectangular parallelepiped are: X ₀ , Z ₀ , and Y ₀ , and the length and width of the standard rectangular parallelepiped pattern formed by projecting the standard rectangular parallelepiped onto the two-dimensional plane according to the specified projection relationship. The heights are: OC, OA, and BD. It is assumed that the length, width, and height of the rectangular parallelepiped are: X, Z, and Y, and the length of the rectangular parallelepiped formed by projecting the rectangular parallelepiped onto the two-dimensional plane according to the specified projection relationship. The width and height are: OC', OA', B'D', and X, Y, Z can be obtained by the following formula:

Wherein, since the preset drawing direction is the negative direction of the y-axis, B'D'=|P3.Y-P2.Y|.

It can be seen that the size of the actual cuboid corresponding to the cuboid figure, that is, the three-dimensional size required by the three-dimensional drawing engine, can be determined according to the drawn rectangular parallelepiped figure, and then the cuboid figure is drawn by the three-dimensional drawing engine. Specifically, the two-dimensional drawing engine or the self-made two-dimensional drawing tool can be used to draw the rectangular parallelepiped figure in the two-dimensional plane (ie, step 201 to step 204 are performed), and the cuboid corresponding to the drawn rectangular parallelepiped figure is determined in the three-dimensional drawing engine. After 3D size, you can erase the drawn cuboid image, pass the 3D size to the 3D drawing engine, and draw a new rectangle with the 3D drawing engine. Body graphics, and support the rotation of the cuboid graphics.

FIG. 2F is a schematic diagram showing another drawing according to an exemplary embodiment of the present invention. Since the first point to the final second point, the final second point to the final third point, and the rotation, the displayed figure exhibits a dynamic effect, and for the convenience of illustration, FIG. 2F exemplifies only seven states. During the drawing process, the first point clicked by the user is taken as the first point, and the first point is used as the starting point to move, and any point in the moving track is the second point, and the corresponding second point is dynamically drawn for each current second point. The target surface, FIG. 2F is exemplified by taking one of the points as an example, such as dynamic drawing to obtain the target surface shown in the second state in FIG. 2F. When the confirmation command is received, the currently drawn target surface is determined as the final target surface, as shown in state three in FIG. 2F. Then, moving from the second point as a starting point, any point in the moving track is the third point, and the corresponding cuboid figure is dynamically drawn for each current third point, and when the confirmation instruction is received, the currently drawn cuboid is drawn. The graphic is determined as the final cuboid pattern, as shown in the state of Figure 4F in the cuboid pattern. According to the calculation, the three-dimensional size of the rectangular parallelepiped corresponding to the cuboid graphic in the three-dimensional drawing engine can be obtained, the three-dimensional size is transmitted to the three-dimensional drawing engine, the new rectangular parallelepiped graphic is drawn by the three-dimensional drawing engine, and the rotation of the rectangular parallelepiped graphic is supported. Figure 2E shows three rotation diagrams, such as state five, state six, and state seven. Since the three-dimensional size of the cuboid in the three-dimensional drawing engine is determined, when the rectangular parallelepiped is rotated, a rectangular parallelepiped figure formed by projecting the rectangular parallelepiped into a two-dimensional plane according to different projection relationships can be displayed.

The various technical features in the above embodiments may be arbitrarily combined, as long as there is no conflict or contradiction between the combinations of the features, but the description is not limited, and thus the various technical features in the above embodiments are combined arbitrarily. It also falls within the scope of this specification.

As shown in FIG. 3, FIG. 3 is a flowchart of another graphic drawing method according to an exemplary embodiment of the present invention, and the method includes the following steps:

In step 301, the first point coordinates are acquired, and the second point coordinates are acquired.

In step 302, the first point coordinate and the second point coordinate are used as coordinates of a pair of diagonal vertices, and the coordinates of the other pair of diagonal vertices are determined according to the preset first angle and the second angle. And drawing a target surface of the rectangular parallelepiped figure according to the obtained coordinates, where the second angle is an angle between two adjacent sides in the preset surface in the preset standard rectangular parallelepiped image, and the first angle is the preset The angle between one edge of the face and one axis of the preset two-dimensional coordinate system in the two-dimensional plane.

In step 303, the third point coordinates are acquired.

In step 304, based on the second point coordinates, the third point coordinates, and the preset drawing direction, the other four vertex coordinates in the cuboid figure are obtained, and other faces of the cuboid figure are drawn.

In step 305, the length, width, and height of the rectangular parallelepiped pattern are determined according to the coordinates of the vertices in the rectangular parallelepiped pattern.

In step 306, the length, width, and height of the cuboid corresponding to the cuboid figure are determined by using the correspondence relationship and the length, width, and height of the cuboid figure, and the determined length, width, and height are input into a three-dimensional drawing. engine.

The correspondence relationship is a relationship between a length of a standard cuboid and a standard cuboid, a relationship between a width of a standard cuboid and a standard cuboid, a relationship between a height of a standard cuboid and a standard cuboid, and the standard cuboid A graph is a graph formed by projecting a standard cuboid onto a two-dimensional plane in a specified projection relationship.

It can be seen from the above embodiment that the present embodiment draws one face of the rectangular parallelepiped figure by two points, and draws the other five faces of the rectangular parallelepiped figure through the third point, thereby realizing the drawing of the rectangular parallelepiped figure, because the user can control the rectangular parallelepiped figure through two points. The length and width control the height of the cuboid figure through the third point, so the drawing instruction can be actively responded to draw the cuboid figure that the user desires to draw, thereby improving the accuracy of drawing the cuboid figure. Moreover, according to the drawn rectangular parallelepiped figure, the three-dimensional size of the rectangular parallelepiped can be obtained, and the three-dimensional size is transmitted to the three-dimensional drawing engine, and the rectangular parallelepiped graphic under the various projection relationships of the rectangular parallelepiped is drawn by the three-dimensional drawing engine, thereby realizing the two-dimensional drawing tool and the three-dimensional drawing engine. Combine.

Corresponding to the foregoing embodiment of the graphics rendering method, the present invention also provides a graphics rendering apparatus, an electronic device to which the apparatus is applied, and an embodiment of a computing storage medium.

As shown in FIG. 4, FIG. 4 is a block diagram of a graphics rendering apparatus according to an exemplary embodiment of the present invention, the apparatus includes:

The coordinate acquiring module 410 is configured to acquire first coordinate coordinates, acquire second coordinate coordinates, and acquire third coordinate coordinates;

a graphic drawing module 420, configured to use the first point coordinate and the second point coordinate as coordinates of a pair of diagonal vertices, and draw a target surface of the rectangular parallelepiped figure according to the preset first angle and the second angle, based on Drawing the second point coordinate, the third point coordinate, and the preset drawing direction to draw other faces of the rectangular parallelepiped graphic;

In an optional implementation manner, the standard cuboid image is a projection image that projects a standard cuboid onto a two-dimensional plane according to a specified projection relationship, and the first angle, the second angle, and a preset drawing direction are based on The specified projection relationship is obtained, and the specified projection relationship includes a placement angle of a standard cuboid, a distance between the standard cuboid and the projection device, a projection direction, and a projection manner.

In an optional implementation, the apparatus further includes a parameter determining module, configured to:

Obtaining the standard rectangular when projecting a standard cuboid from a three-dimensional space to a two-dimensional plane according to a specified projection relationship The three-dimensional coordinates of the vertices of the body;

In an optional implementation, the graphic drawing module 420 is specifically configured to:

In an optional implementation, the apparatus further includes:

For details of the implementation process of the functions and functions of the modules in the foregoing devices, refer to the implementation process of the corresponding steps in the foregoing methods, and details are not described herein again.

For the device embodiment, since it basically corresponds to the method embodiment, reference may be made to the partial description of the method embodiment. The device embodiments described above are merely illustrative, wherein the modules described as separate components may or may not be physically separate, and the components displayed as modules may or may not be physical modules, ie may be located A place, or it can be distributed to multiple network modules. Some or all of the modules may be selected according to actual needs to achieve the objectives of the solution of the present invention. Those of ordinary skill in the art are not creative In the case of action, it can be understood and implemented.

Correspondingly, the present invention also provides an electronic device, the device comprising a processor; a memory for storing processor-executable instructions; wherein the processor is configured to:

Correspondingly, the embodiment of the present application further provides a computer storage medium, where the storage medium stores program instructions, where the program instructions include:

The application can take the form of a computer program product embodied on one or more storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) in which program code is embodied. Computer-usable storage media includes both permanent and non-persistent, removable and non-removable media, and information storage can be implemented by any method or technology. The information can be computer readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read only memory. (ROM), electrically erasable programmable read only memory (EEPROM), flash memory or other memory technology, compact disk read only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, Magnetic tape cartridges, magnetic tape storage or other magnetic storage devices or any other non-transportable media can be used to store information that can be accessed by a computing device.

As shown in FIG. 5, FIG. 5 is a block diagram of an apparatus 500 for graphics rendering, according to an exemplary embodiment.

For example, device 500 can be provided as a computer. Referring to FIG. 5, apparatus 500 includes a processing component 522 that further includes one or more processors, and memory resources represented by memory 532 for storing instructions executable by processing component 522, such as an application. An application stored in memory 532 can include one or more modules each corresponding to a set of instructions. Additionally, processing component 522 is configured to execute instructions to perform the graphics rendering method described above.

Apparatus 500 can also include a power supply component 526 configured to perform power management of apparatus 500, a wired or wireless network interface 550 configured to connect apparatus 500 to the network, and an input/output (I/O) interface 558. Device 500 can operate based on an operating system stored in memory 532.

Wherein, when the instructions in the memory 532 are executed by the processing component 522, the apparatus 500 is enabled to perform a graphics rendering method, including:

Other embodiments of the present disclosure will be apparent to those skilled in the <RTIgt; The present disclosure is intended to cover any variations, uses, or adaptations of the present disclosure, which are in accordance with the general principles of the present disclosure and include common general knowledge or conventional technical means in the art that are not disclosed in the present disclosure. . The specification and examples are to be regarded as illustrative only,

It is to be understood that the invention is not limited to the details of the details and The scope of the disclosure is to be limited only by the appended claims.

The above description is only the preferred embodiment of the present disclosure, and is not intended to limit the disclosure, and any modifications, equivalents, improvements, etc., which are made within the spirit and principles of the present disclosure, should be included in the present disclosure. Within the scope of protection.

Claims

A graphic drawing method, the method comprising:

Obtaining the coordinates of the first point; acquiring the coordinates of the second point; acquiring the coordinates of the third point;

Taking the first point coordinate and the second point coordinate as coordinates of a pair of diagonal vertices, and combining the preset first angle and the second angle to draw a target surface of the rectangular parallelepiped, the second angle is pre The angle between two adjacent sides in the preset surface in the standard rectangular parallelepiped image, the first angle is a clip of one side of the preset surface and one axis of the preset two-dimensional coordinate system in the two-dimensional plane angle;

And drawing other faces of the cuboid figure based on the second point coordinates, the third point coordinates, and a preset drawing direction, where the preset drawing direction is an edge connected to the preset surface in the standard cuboid figure The direction.
The method according to claim 1, wherein the standard cuboid map is a projection graph that projects a standard cuboid onto a two-dimensional plane according to a specified projection relationship, the first angle, the second angle, and a preset. The drawing direction is obtained based on the specified projection relationship including a placement angle of the standard cuboid, a distance between the standard cuboid and the projection device, a projection direction, and a projection manner.
The method according to claim 2, wherein the step of obtaining the first angle, the second angle, and the preset drawing direction comprises:

Obtaining three-dimensional coordinates of each vertex of the standard cuboid when projecting a standard cuboid from a three-dimensional space to a two-dimensional plane according to a specified projection relationship;

And transforming the three-dimensional coordinates of each vertex into two-dimensional coordinates of the corresponding vertex on a preset two-dimensional coordinate system according to the projection matrix of the three-dimensional space to the two-dimensional plane in the specified projection relationship, and determining the two-dimensional plane according to the two-dimensional coordinates Standard cuboid in the middle;

Determining an edge of the preset surface in the standard cuboid image with an axis of the predetermined two-dimensional coordinate system as a first angle, and clamping the two adjacent sides of the preset surface The angle is determined to be a second angle, and a direction of an edge of the standard cuboid map connected to the preset surface is determined as the preset drawing direction.
The method according to claim 1, wherein the drawing the target face of the rectangular parallelepiped figure in combination with the preset first angle and the second angle comprises:

Obtaining a new two-dimensional coordinate system, the new two-dimensional coordinate system is the same as the origin of the preset two-dimensional coordinate system, and the angle between the new two-dimensional coordinate system and the corresponding axis of the preset two-dimensional coordinate system is First angle;

Converting the first point coordinate and the second point coordinate in the preset two-dimensional coordinate system to the new two-dimensional coordinate system based on a transformation matrix of a preset two-dimensional coordinate system to a new two-dimensional coordinate system, and obtaining a The first point new coordinate and the second point new coordinate in the new two-dimensional coordinate system;

Determining coordinates of another pair of diagonal vertices in the new two-dimensional coordinate system according to the first point new coordinate, the second point new coordinate, and the preset second angle;

The target surface of the cuboid graphic is drawn according to the coordinates of the two pairs of diagonal vertices.
The method according to any one of claims 1 to 4, further comprising:

Determining, according to the length, width, and height of the standard cuboid, the length, width, and height of the standard cuboid;

Determining, according to coordinates of each vertex in the rectangular parallelepiped figure, length, width, and height of the rectangular parallelepiped graphic;

The length, width, and height of the rectangular parallelepiped corresponding to the cuboid figure are determined by using the correspondence relationship and the length, width, and height of the cuboid figure, and the determined length, width, and height are input to the three-dimensional drawing engine.
A graphics drawing device, characterized in that the device comprises:

a coordinate acquiring module, configured to acquire a first point coordinate; acquire a second point coordinate; and acquire a third point coordinate;

a graphic drawing module, configured to use the first point coordinate and the second point coordinate as coordinates of a pair of diagonal vertices, and draw a target surface of the rectangular parallelepiped figure according to the preset first angle and the second angle, based on Depicting the second point coordinate, the third point coordinate, and the preset drawing direction, and drawing other faces of the rectangular parallelepiped graphic;

The second angle is an angle between two adjacent sides in the preset surface in the preset standard rectangular parallelepiped, and the first angle is one of the preset surface and the two-dimensional plane An angle of one axis of the two-dimensional coordinate system is set, and the preset drawing direction is a direction of an edge of the standard rectangular parallelepiped that is connected to the preset surface.
The apparatus according to claim 6, wherein the standard cuboid image is a projection image that projects a standard cuboid onto a two-dimensional plane according to a specified projection relationship, the first angle, the second angle, and a preset. The drawing direction is obtained based on the specified projection relationship including a placement angle of the standard cuboid, a distance between the standard cuboid and the projection device, a projection direction, and a projection manner.
The device according to claim 7, wherein the device further comprises a parameter determining module, configured to:

Obtaining three-dimensional coordinates of each vertex of the standard cuboid when projecting a standard cuboid from a three-dimensional space to a two-dimensional plane according to a specified projection relationship;

And transforming the three-dimensional coordinates of each vertex into two-dimensional coordinates of the corresponding vertex on a preset two-dimensional coordinate system according to the projection matrix of the three-dimensional space to the two-dimensional plane in the specified projection relationship, and determining the two-dimensional plane according to the two-dimensional coordinates Standard cuboid in the middle;

Determining an edge of the preset surface in the standard cuboid image with an axis of the predetermined two-dimensional coordinate system as a first angle, and clamping the two adjacent sides of the preset surface The angle is determined to be a second angle, and a direction of an edge of the standard cuboid map connected to the preset surface is determined as the preset drawing direction.
The device according to any one of claims 6 to 8, wherein the device further comprises:

a three-dimensional size determining module, configured to determine a length, a width, and a height of the standard cuboid, respectively corresponding to a length, a width, and a height of the standard cuboid figure; determining the cuboid according to coordinates of each vertex in the cuboid figure Length, width, and height of the graphic; determining, by using the correspondence relationship and the length, width, and height of the rectangular parallelepiped figure, corresponding to the rectangular parallelepiped graphic The length, width, and height of the cuboid;

An information transmission module for inputting the determined length, width, and height into the three-dimensional drawing engine.
An electronic device, comprising:

processor;

a memory for storing processor executable instructions;

Wherein the processor is configured to:

Obtaining the coordinates of the first point; acquiring the coordinates of the second point; acquiring the coordinates of the third point;

Taking the first point coordinate and the second point coordinate as coordinates of a pair of diagonal vertices, and combining the preset first angle and the second angle to draw a target surface of the rectangular parallelepiped, the second angle is pre The angle between two adjacent sides in the preset surface in the standard rectangular parallelepiped image, the first angle is a clip of one side of the preset surface and one axis of the preset two-dimensional coordinate system in the two-dimensional plane angle;

And drawing other faces of the cuboid figure based on the second point coordinates, the third point coordinates, and a preset drawing direction, where the preset drawing direction is an edge connected to the preset surface in the standard cuboid figure The direction.