CN114529706A - Method, device, equipment and medium for splitting target object in three-dimensional model - Google Patents
Method, device, equipment and medium for splitting target object in three-dimensional model Download PDFInfo
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Abstract
The invention relates to the technical field of computers, and provides a method, a device, equipment and a medium for splitting a target object in a three-dimensional model, wherein the method comprises the following steps: acquiring first vertex information of a target object in a three-dimensional model; drawing a target object in a two-dimensional canvas based on the first vertex information and a preset dimension conversion relation, wherein the dimension conversion relation is used for indicating the corresponding relation between coordinate information in a three-dimensional coordinate system and coordinate information in the canvas coordinate system; splitting a target object in a two-dimensional canvas to obtain at least two sub-objects; acquiring second vertex information of each sub-object; and splitting the target object in the three-dimensional model based on the second vertex information and the dimension conversion relation. The method and the device are used for overcoming the defects of long time consumption and low efficiency in the prior art when the target object is split in the three-dimensional model, and realizing the rapid splitting of the target object in the three-dimensional model.
Description
Technical Field
The invention relates to the technical field of computers, in particular to a method, a device, equipment and a medium for splitting a target object in a three-dimensional model.
Background
In the prior art, when splitting a target object in a three-dimensional model, a three-dimensional software is used to display the target object in the three-dimensional model, so as to split the target object. However, the target object cannot be visually displayed in this way, which results in long time consumption and low efficiency in splitting the target object.
Disclosure of Invention
The invention provides a method, a device, equipment and a medium for splitting a target object in a three-dimensional model, which are used for solving the defects of long time consumption and low efficiency in splitting the target object in the three-dimensional model in the prior art and realizing the rapid splitting of the target object in the three-dimensional model.
The invention provides a method for splitting a target object in a three-dimensional model, which comprises the following steps:
acquiring first vertex information of a target object in a three-dimensional model;
drawing the target object in a two-dimensional canvas based on the first vertex information and a preset dimension conversion relation, wherein the dimension conversion relation is used for indicating a corresponding relation between coordinate information in a three-dimensional coordinate system and coordinate information in a canvas coordinate system;
splitting the target object in the two-dimensional canvas to obtain at least two sub-objects;
acquiring second vertex information of each sub-object;
splitting the target object in the three-dimensional model based on the second vertex information and the dimension conversion relationship.
According to the method for splitting the target object in the three-dimensional model provided by the invention, before splitting the target object in the two-dimensional canvas to obtain at least two sub-objects, the method further comprises the following steps:
determining a ratio of a height and a width of the target object;
comparing the ratio with a preset value to obtain a comparison result;
splitting the target object in the two-dimensional canvas to obtain at least two sub-objects, including:
and splitting the target object in the two-dimensional canvas based on the comparison result to obtain the sub-object.
According to the method for splitting the target object in the three-dimensional model provided by the invention, the splitting the target object in the two-dimensional canvas based on the comparison result to obtain the sub-object comprises the following steps:
under the condition that the comparison result is that the ratio is larger than the preset value, splitting the target object in the two-dimensional canvas based on the height of the target object and a first preset height to obtain the sub-object;
under the condition that the comparison result is determined that the ratio is smaller than or equal to the preset value, splitting the target object in the two-dimensional canvas based on the height of the target object, the first preset height and the second preset height to obtain the sub-object;
wherein the height of the target object is greater than or equal to the sum of the first preset height and the second preset height.
According to the method for splitting the target object in the three-dimensional model provided by the invention, the three-dimensional model comprises the following steps: a three-dimensional building model;
the target object includes: a floor slab;
splitting the target object in the two-dimensional canvas based on the comparison result to obtain the sub-object, including:
determining the floor slab to be a one-way plate under the condition that the comparison result is that the ratio is larger than the preset value; determining a first segmentation mode corresponding to the unidirectional plate based on the height of the floor slab and the first preset height; splitting the one-way plate in the two-dimensional canvas based on the first splitting mode to obtain the sub-object;
determining the floor slab to be a bidirectional slab under the condition that the comparison result is that the ratio is smaller than or equal to the preset value; determining a second segmentation mode corresponding to the bidirectional plate based on the height of the floor slab, the first preset height and the second preset height; and splitting the bidirectional board in the two-dimensional canvas based on the second segmentation mode to obtain the sub-object.
According to the method for splitting the target object in the three-dimensional model, which is provided by the invention, the splitting of the one-way plate in the two-dimensional canvas based on the first splitting mode comprises the following steps:
creating at least one temporary cutting line based on the first segmentation mode;
acquiring a click instruction of a mouse in the two-dimensional canvas;
converting the temporary cutting line into a cutting line based on the click command so as to split the one-way board in the two-dimensional canvas;
the splitting the bi-directional panel in the two-dimensional canvas based on the second splitting manner includes:
creating at least two temporary cutting lines based on the second cutting mode;
acquiring the click instruction;
based on the click command, converting the temporary cut line into the cut line so as to split the bidirectional board in the two-dimensional canvas.
According to the method for splitting the target object in the three-dimensional model, provided by the invention, the step of drawing the target object in the two-dimensional canvas based on the first vertex information and the preset dimension conversion relationship comprises the following steps:
determining third vertex information corresponding to the first vertex information based on the dimension conversion relation, wherein the third vertex information is coordinate information in the canvas coordinate system;
removing a value corresponding to the Z axis in the third vertex information to obtain new third vertex information;
drawing the target object in the two-dimensional canvas based on the new third vertex information.
According to the method for splitting the target object in the three-dimensional model provided by the present invention, before splitting the target object in the three-dimensional model based on the second vertex information and the dimension conversion relationship, the method further includes:
storing a value corresponding to a Z axis in the first vertex information;
the splitting the target object in the three-dimensional model based on the second vertex information and the dimension conversion relationship includes:
determining fourth vertex information corresponding to the second vertex information based on the dimension conversion relationship, wherein the fourth vertex information is coordinate information in the three-dimensional coordinate system;
adding the value corresponding to the Z axis into the fourth vertex information to obtain new fourth vertex information;
splitting the target object in the three-dimensional model based on the new fourth vertex information.
The invention also provides a device for splitting the target object in the three-dimensional model, which comprises:
the first acquisition module is used for acquiring first vertex information of a target object in the three-dimensional model;
the drawing module is used for drawing the target object in a two-dimensional canvas based on the first vertex information and a preset dimension conversion relation, and the dimension conversion relation is used for indicating the corresponding relation between coordinate information in a three-dimensional coordinate system and coordinate information in a canvas coordinate system;
the first splitting module is used for splitting the target object in the two-dimensional canvas to obtain at least two sub-objects;
the second acquisition module is used for acquiring second vertex information of each sub-object;
and the second splitting module is used for splitting the target object in the three-dimensional model based on the second vertex information and the dimension conversion relation.
The invention also provides an electronic device, which comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor executes the program to realize the method for splitting the target object in the three-dimensional model.
The present invention also provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements a method of splitting a target object in a three-dimensional model as described in any of the above.
According to the method, the device, the equipment and the medium for splitting the target object in the three-dimensional model, the first vertex information of the target object in the three-dimensional model is obtained; the target object is drawn in the two-dimensional canvas based on the first vertex information and a preset dimension conversion relation, wherein the dimension conversion relation is used for indicating the corresponding relation between the coordinate information under the three-dimensional coordinate system and the coordinate information under the canvas coordinate system; the target object is clearly and visually displayed in the two-dimensional canvas, so that the target object can be conveniently and quickly split, and finally, second vertex information of each sub-object is obtained; the target object in the three-dimensional model is split based on the second vertex information and the dimension conversion relation, the splitting of the target object in the three-dimensional model is completed, the whole process is convenient and quick, the splitting time is effectively shortened, and the splitting efficiency is improved.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic flow chart of a method for splitting a target object in a three-dimensional model according to the present invention;
FIG. 2 is a second flowchart of a method for splitting a target object in a three-dimensional model according to the present invention;
FIG. 3 is a third schematic flowchart of a method for splitting a target object in a three-dimensional model according to the present invention;
FIG. 4 is a fourth flowchart of a method for splitting a target object in a three-dimensional model according to the present invention;
FIG. 5 is a fifth flowchart illustrating a method for splitting a target object in a three-dimensional model according to the present invention;
FIG. 6 is a sixth schematic flowchart of a method for splitting a target object in a three-dimensional model according to the present invention;
FIG. 7 is a seventh flowchart of a method for splitting a target object in a three-dimensional model according to the present invention;
FIG. 8 is a schematic structural diagram of a device for splitting a target object in a three-dimensional model provided by the present invention;
fig. 9 is a schematic structural diagram of an electronic device provided by the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Specifically, in the prior art, when the floor in the three-dimensional model is split by using three-dimensional software, whether the target floor is a unidirectional plate or a bidirectional plate cannot be determined, manual determination is required, and whether the target floor is a unidirectional plate or a bidirectional plate is determined based on a manual determination result. After the target floor is determined, the floor is cut, but the target floor is cut in the three-dimensional model, size marking is not displayed, artificial marking size is needed, and then the floor is cut based on the artificial marking size, so that the floor splitting efficiency is low in the process. If the size is not marked artificially, the problem of cutting size errors is easily caused, the cutting needs to be carried out again, and the floor slab splitting efficiency is low. In addition, the target floor slab cannot be visually displayed when the target floor slab is switched in the three-dimensional model, the cutting process is long in time consumption, and the efficiency is low.
The method for splitting a target object in a three-dimensional model according to the present invention is described below with reference to fig. 1 to 7.
The embodiment of the invention provides a method for splitting a target object in a three-dimensional model, which can be applied to a server and an intelligent terminal. The method is applied to a server as an example, but it should be noted that the method is only an example and is not intended to limit the scope of protection. The specific examples in the embodiments are not intended to limit the scope of protection, and will not be described one by one. The specific implementation of the method is shown in fig. 1:
Wherein, the three-dimensional model includes: a three-dimensional building model.
Wherein the target object includes: and (7) a floor slab.
Specifically, first vertex information of a floor slab in the three-dimensional model is extracted by using building information model software (Revit). The method specifically comprises the following steps: a set of vertices of the geometric outer contour of the upper surface of the floor member in the three-dimensional building model is extracted, and the set of vertices is used as first vertex information. Wherein the geometric outer contour comprises a quadrilateral.
In the following, examples are given:
the first vertex information is represented by means of vertices, each first vertex coordinate being represented by the array List < XYZ >, the coordinates being in millimeters. In the following, the first vertex information includes 4 first vertex coordinates as an example:
TABLE 1 first vertex information
And 102, drawing the target object in the two-dimensional canvas based on the first vertex information and a preset dimension conversion relation.
The dimension conversion relation is used for indicating the corresponding relation between the coordinate information in the three-dimensional coordinate system and the coordinate information in the canvas coordinate system.
The X axis of the three-dimensional coordinate system is right, the Y axis is upward, the origin of the canvas coordinate system is at the upper left corner of the canvas, the X axis is right, and the Y axis is downward, so that the first vertex information needs to be converted in order to draw the target object in the three-dimensional coordinate system into the two-dimensional canvas. In order to realize the correspondence between the coordinate information in the three-dimensional coordinate system and the coordinate information in the canvas coordinate system, a dimension conversion relationship needs to be created in advance.
The quadrangle corresponding to the floor slab is a rectangle, and the rectangle is a centrosymmetric figure, so that the target object is transformed or turned by taking the center of the rectangle as a reference.
Specifically, the first vertex coordinates at the lower left position on the XY plane are obtained by traversing the first vertex information and comparing the size of each value in the X axis with the size of each value in the Y axis, and are recorded as the minimum vertex coordinates, and the first vertex coordinates at the upper right position are recorded as the maximum vertex coordinates. The minimum vertex coordinate is denoted by min and the maximum vertex coordinate is denoted by max.
For example:
max=(-8500.000000000,26268.832031250,3150.000000000)
min=(-11900.000000000,16443.070312500,3150.000000000)
obtaining the center coordinate of the target object through the minimum vertex coordinate and the maximum vertex coordinate:
center=(max+min)/2=
(-10200.000000000,21355.951171875,3150.000000000)
next, the target object is turned over and transformed to the canvas coordinate system through the model transformation matrix:
where center.x represents the value of the X axis of the center coordinate, center.y represents the value of the Y axis of the center coordinate, and center.z represents the value of the Z axis of the center coordinate.
The model transformation matrix may be a dimension transformation relationship of the present application.
In a specific embodiment, third vertex information corresponding to the first vertex information is determined based on a dimension conversion relation, and the third vertex information is coordinate information in a canvas coordinate system; removing a value corresponding to the Z axis in the third vertex information to obtain new third vertex information; based on the new third vertex information, the target object is drawn in the two-dimensional canvas.
Specifically, before determining third vertex information corresponding to the first vertex information through a dimension conversion relationship, traversing the first vertex information to obtain a center coordinate of the first vertex information, and inputting the obtained center coordinate into a model transformation matrix to obtain the third vertex information. Since the third vertex information obtained by conversion based on the dimension conversion relationship is a three-dimensional coordinate, which is a two-dimensional canvas in the present application, in order to clearly and intuitively display the target object in the two-dimensional canvas, a value corresponding to the Z axis in the third vertex information needs to be removed, and a value corresponding to the X axis and a value corresponding to the Y axis in the XY plane are obtained. And taking the value corresponding to the X axis and the value corresponding to the Y axis as new third vertex information, and drawing the target object in the two-dimensional canvas.
Specifically, before the target object is drawn in the two-dimensional canvas based on the new third vertex information, the third vertex information is normalized, that is, the third vertex information is transformed into the range of the unit matrix of [ -1,1], specifically, by projecting a transformation matrix:
where max.x denotes a value of an X-axis of the maximum vertex coordinate, min.x denotes a value of an X-axis of the minimum vertex coordinate, max.y denotes a value of a Y-axis of the maximum vertex coordinate, and min.y denotes a value of a Y-axis of the minimum vertex coordinate.
Specifically, after the third vertex information is transformed to the range of the identity matrix of [ -1,1], a first aspect ratio of the width and height of the target object is calculated, and a second aspect ratio of the width and height of the two-dimensional canvas is calculated. Specifically, after obtaining the first vertex information, the first aspect ratio is determined, and after determining the two-dimensional canvas, the second aspect ratio is determined.
In the following, a first aspect ratio modelRatio = modelWidth/modelHeight = 0.346029 will be described by taking as an example that the width modelWidth = | max.x-min.x | =3400 of the target object and the height modelHeight = | max.y-min.y | =9826 of the target object. Taking the example of the canvas width viewWidth =1265 canvas height viewHeight =874, the second aspect ratio viewRatio = viewWidth/viewHeight =1.447368 is based on this.
Specifically, after the first aspect ratio and the second aspect ratio are obtained, the first aspect ratio and the second aspect ratio are compared, and based on a comparison result, whether to directly draw the target object in the two-dimensional canvas or to further zoom the target object is determined, and the zoomed target object is drawn in the two-dimensional canvas.
Specifically, at this time, a concept of the view port aspect ratio is introduced, and the view port is an area in the two-dimensional canvas where the target object is displayed, so that the target object needs to be drawn with reference to the view port aspect ratio (ascpectRatio).
Specifically, in the case of modelRatio < = viewRatio, the viewport aspect ratio = modelRatio, and the target object can be directly drawn in the two-dimensional canvas. If modelRatio > viewRatio, it is determined whether viewRatio is greater than 1, if so, ascictratio = modelRatio/viewRatio, otherwise, ascictratio = modelRatio/viewRatio, and at this time, the target object needs to be scaled and the scaled target object is drawn in the two-dimensional canvas.
Specifically, the zoom operation of the target object is performed according to the specified zoom scale through the viewport transformation matrix, and the zoomed target object is drawn in the center of the canvas. And judging the height and width of the target object, and scaling by using the short edge of the target object. In the example in the present embodiment, the modeltidth of the target object is smaller than the modeltehight, so the short side length = modeltidth = 3400.
In addition, in order to reserve the marked position, the whole target object needs to be scaled by a preset ratio, where the preset ratio is expressed by scaledratio, and the example is described by taking scaledratio =0.7 as an example. The viewport transformation matrix is as follows:
specifically, the viewport transformation matrix and the projection transformation matrix are multiplied by the model transformation matrix to obtain a composite transformation matrix. In order to draw a target object in a two-dimensional canvas conveniently and quickly, a composite transformation matrix can be used as a dimension conversion relation of the application, and the composite transformation matrix is as follows:
where the composite transformation matrix is a 4 x 4 matrix, but since the matrix is large, it is shown for clarity below by section 2:
the composite transformation matrix is represented by A, A =
Wherein, B is a matrix of 4 x 2, and C is a matrix of 4 x 2.
In the following, the dimension conversion relationship is taken as an example of a composite transformation matrix:
specifically, before splitting a target object in a two-dimensional canvas, first vertex information is traversed, all first vertex coordinates are transformed based on a composite transformation matrix to obtain a new vertex set, and a value corresponding to a Z axis in the new vertex set is recorded. Wherein the new set of vertices is third vertex information.
TABLE 2 third vertex information
And traversing second vertex coordinates in the third vertex information, removing a value corresponding to the Z axis in the third vertex information, obtaining two-dimensional coordinates of an XY plane, and taking the two-dimensional coordinates as new third vertex information, wherein the second vertex coordinates are coordinate information in a canvas coordinate system.
TABLE 3 New third vertex information
And creating a target object in the canvas based on the second vertex coordinate in the new third vertex information, and displaying the target object in the canvas, which can be seen in fig. 2. The height and width of the target object can be displayed in real time in fig. 2.
And 103, splitting the target object in the two-dimensional canvas to obtain at least two sub-objects.
In a specific embodiment, after the target object is created in the canvas based on the second vertex coordinates in the new third vertex information, the ratio of the height to the width of the target object is determined; comparing the ratio with a preset value to obtain a comparison result; and splitting the target object in the two-dimensional canvas based on the comparison result to obtain the sub-object.
Specifically, the ratio of the height and the width of the target object is represented by ratio.
ratio = modelHeight/modelWidth
In a specific embodiment, when the comparison result is that the ratio is greater than the preset value, splitting the target object in the two-dimensional canvas based on the height of the target object and the first preset height to obtain a sub-object; under the condition that the comparison result is that the ratio is smaller than or equal to the preset value, splitting the target object in the two-dimensional canvas based on the height of the target object, the first preset height and the second preset height to obtain a sub-object; the height of the target object is greater than or equal to the sum of the first preset height and the second preset height.
Specifically, a temporary cutting line is created in the target object based on the height of the target object and a first preset height, and basic data are provided for splitting the target object in the two-dimensional canvas; and creating a temporary cutting line in the target object based on the height of the target object, the first preset height and the second preset height, and providing basic data for splitting the target object in the two-dimensional canvas.
In a specific embodiment, under the condition that the comparison result is that the ratio is greater than the preset value, determining that the floor slab is a one-way plate; determining a first segmentation mode corresponding to the unidirectional plate based on the height of the floor slab and a first preset height; splitting a one-way plate in the two-dimensional canvas based on a first splitting mode to obtain a sub-object; determining the floor slab to be a bidirectional plate under the condition that the comparison result is that the ratio is smaller than or equal to the preset value; determining a second segmentation mode corresponding to the bidirectional plate based on the height of the floor slab, the first preset height and the second preset height; and splitting the two-way board in the two-dimensional canvas based on the second splitting mode to obtain the sub-object.
The first preset height is the splitting height corresponding to the floor slab, and the second preset height is the height corresponding to the cast-in-place section.
Specifically, the first division mode is to create a temporary cutting line in the unidirectional sheet based on a first preset height in the height direction of the unidirectional sheet. The second segmentation mode is at the direction of height of two-way board, based on two-way board in the two-dimensional canvas of preset splitting mode split, obtains the sub-object, and preset splitting mode is: creating a temporary cut line in the bi-directional board based on a first preset height in a height direction of the bi-directional board, and creating a temporary cut line of a cast-in-place section in the bi-directional board based on a second preset height in the height direction of the bi-directional board.
Specifically, the preset value equal to 3 is taken as an example for explanation:
and if the ratio is greater than 3, determining that the target object is a one-way plate, otherwise, determining that the target object is a two-way plate.
In this embodiment, modelHeight =9826 and modelWidth =3400 are taken as examples to explain:
ratio = model height/model width = 2.89, it can be seen that 2.89 is less than or equal to 3, the target object in this embodiment is a bi-directional slab, and a cast-in-place section needs to be created between the cut floors.
The method determines whether the target object is the unidirectional board or the bidirectional board by calculating the ratio of the height to the width of the target object without manual calculation, thereby effectively improving the splitting efficiency of the target object and reducing the splitting time.
In a specific embodiment, based on a first segmentation mode, automatically calculating the segmentation condition of the unidirectional board, and creating at least one temporary cutting line to obtain at least two quadrangles and the height of each quadrangle; acquiring a click instruction of a mouse; and converting the temporary cutting line into a cutting line based on the click command, and completing the splitting of the one-way board in the two-dimensional canvas. Based on a second segmentation mode, automatically calculating the segmentation condition of the bidirectional plate, and creating at least two temporary cutting lines to obtain at least three quadrangles and the height of each quadrangle; acquiring a click instruction of a mouse in a two-dimensional canvas; and converting the temporary cutting line into a cutting line based on the click command, and completing the splitting of the two-way board in the two-dimensional canvas.
In a specific embodiment, based on a first segmentation mode, automatically calculating the segmentation condition of the unidirectional board, and creating at least one temporary cutting line to obtain at least two quadrangles and the height of each quadrangle; acquiring position information of a mouse and a click instruction of the mouse in a two-dimensional canvas; and converting the temporary cutting line into a cutting line based on the position information and the click command, and completing the splitting of the one-way board in the two-dimensional canvas. Based on a second segmentation mode, automatically calculating the segmentation condition of the bidirectional plate, and creating at least two temporary cutting lines to obtain at least three quadrangles and the height of each quadrangle; acquiring position information of a mouse and a click instruction of the mouse in a two-dimensional canvas; and converting the temporary cutting line into a cutting line based on the position information and the click command, and completing the splitting of the two-way board in the two-dimensional canvas.
And after the position information of the mouse is determined to be at the position of any temporary cutting line and the click command of the mouse is acquired, converting the temporary cutting line into the cutting line.
After the height of each quadrangle is obtained, the height of each quadrangle is displayed in the two-dimensional canvas, so that a user can conveniently check the height.
Next, the first preset height 2231.5 and the second preset height 300 will be described as an example. Specifically, as shown in fig. 3, the temporary cutting line is indicated by a dotted line, and the height of a quadrangle formed by the temporary cutting line and the width of the floor slab is shown in real time in fig. 3.
According to the invention, a plurality of temporary cutting lines can be created at the same time, and after the click command is obtained, the plurality of temporary cutting lines are converted into the cutting lines at the same time.
Additionally, to improve the efficiency of splitting floors, standardized splitting logic is created. Namely, when different heights exist in the same type of floor slabs, the floor slabs are separated according to the first preset height corresponding to the floor slabs. For example, there are a plurality of the first preset heights, e.g., 2000,1500,1000, etc. The floor slabs with different heights correspond to different first preset heights. Therefore, when the height of the floor slab is obtained, the first preset height corresponding to the height needs to be determined, and then the floor slab is detached according to the determined first preset height. The second preset height is determined to be the same as the first preset height, and the user can preset the second preset height according to the needs of actual conditions.
Specifically, when the floor slab is determined to be the one-way plate, the corresponding first preset height is determined based on the height of the one-way plate, and the one-way plate is split based on the first preset height. The step of determining that the floor slab is a bidirectional slab comprises the steps of determining a corresponding first preset height and a corresponding second preset height based on the height of the bidirectional slab, and splitting the bidirectional slab based on the first preset height and the second preset height.
Specifically, before the floor slab is split, a first quotient of the height of the floor slab and a preset splitting value is calculated. When the first quotient value is an integer, a temporary cut line is created in the target object based on the height of the target object and the first preset height, or the temporary cut line is created in the target object based on the height of the target object, the first preset height and the second preset height. When the first quotient value is a decimal, determining the quotient and the remainder, calculating a second quotient of the height of the partial floor corresponding to the remainder and the quotient, and creating a temporary cutting line in the target object based on the height of the target object, the first preset height and the second quotient, or creating the temporary cutting line in the target object based on the height of the target object, the first preset height, the second preset height and the second quotient.
And the second quotient value is used for representing a gap between each floor slab, and the preset splitting value is smaller than the height of each floor slab.
In addition, the invention can also convert the temporary cutting line into the cutting line one by one. And when the height of the quadrangle is determined to be equal to the first preset height, acquiring a click command of the mouse, and converting the temporary cutting line into a cutting line based on the click command, wherein the cutting line is represented by a solid line. After switching a floor area, a cast-in-place section having a quadrangular height of 300 is created using the steps of the above process. And repeatedly executing the steps of creating the cutting line corresponding to the first preset height and creating the cutting line corresponding to the second preset height until the target object is completely split. See in particular fig. 4 and 5.
Fig. 4 is a result corresponding to one execution process of creating a cutting line corresponding to a first preset height and creating a cutting line corresponding to a second preset height, fig. 5 is a result corresponding to a target object after the target object is completely detached, and an area marked by an oblique line in fig. 5 corresponds to a floor slab.
In the process of cutting the target object, the height and the width of the floor slab and the width and the height of the quadrangle are always in a display state, the specific position of the created cutting line can be visually determined, and compared with the mode that manual marking is needed in the prior art, the floor slab splitting efficiency is effectively improved.
In addition, the method and the device can visually check the split result, clearly determine the corresponding dimension information of each floor slab after splitting, and effectively improve the user experience.
And 104, acquiring second vertex information of each sub-object.
Specifically, after the target object is split, a vertex set of a plurality of polygons obtained by splitting is obtained, and the vertex set at this time is used as second vertex information.
Wherein the second vertex information includes only values corresponding to the X-axis and the Y-axis in the XY plane.
And 105, splitting the target object in the three-dimensional model based on the second vertex information and the dimension conversion relation.
In a specific embodiment, based on the dimension conversion relationship, fourth vertex information corresponding to the second vertex information is determined, and a previously stored value corresponding to the Z axis is added to the fourth vertex information to obtain new fourth vertex information; and splitting the target object in the three-dimensional model based on the new fourth vertex information, wherein the fourth vertex information is coordinate information in a three-dimensional coordinate system.
The invention realizes two-dimensional and three-dimensional linkage by utilizing the dimension conversion relation, converts the three-dimensional data into the two-dimensional data so as to clearly and visually split the target object in the two-dimensional canvas, and further splits the target object in the three-dimensional model based on the splitting result of the two-dimensional canvas, the whole process is convenient and quick, and the time consumed by splitting the target object in the three-dimensional model is reduced.
Next, a specific implementation manner of drawing the target object in the three-dimensional model on the two-dimensional canvas is specifically described with reference to fig. 6:
And 603, traversing the outline vertex set, transforming all the vertexes by using the composite transformation matrix to obtain a new vertex set, and recording the Z-axis coordinate of the vertex.
And step 604, traversing the vertex set obtained in the previous step, abandoning the Z-axis coordinate, and creating a two-dimensional coordinate vertex to obtain a vertex set in a two-dimensional coordinate system.
Step 605 creates a polygon in the canvas from the set of two-dimensional coordinate vertices.
Next, a specific implementation manner of splitting the target object in the two-dimensional canvas and splitting the target object in the three-dimensional model is specifically described with reference to fig. 7:
Step 705, transforming the coordinates under the canvas coordinate system into coordinates under the world coordinate system by using inverse transformation of the composite transformation matrix to obtain a three-dimensional coordinate vertex set under the world coordinate system, calling Revit, and splitting a target object in the three-dimensional model according to the transformed three-dimensional coordinate vertex set.
The method for splitting the target object in the three-dimensional model comprises the steps of obtaining first vertex information of the target object in the three-dimensional model; the target object is drawn in the two-dimensional canvas based on the first vertex information and a preset dimension conversion relation, wherein the dimension conversion relation is used for indicating the corresponding relation between the coordinate information under the three-dimensional coordinate system and the coordinate information under the canvas coordinate system; the target object is clearly and visually displayed in the two-dimensional canvas, so that the target object can be conveniently and quickly split, and finally, second vertex information of each sub-object is obtained; the target object in the three-dimensional model is split based on the second vertex information and the dimension conversion relation, the splitting of the target object in the three-dimensional model is completed, the whole process is convenient and quick, the splitting time is effectively shortened, and the splitting efficiency is improved.
The following describes a device for splitting a target object in a three-dimensional model, where the device for splitting a target object in a three-dimensional model described below and the method for splitting a target object in a three-dimensional model described above may be referred to correspondingly, and repeated parts are not repeated, as shown in fig. 8, the device includes:
a first obtaining module 801, configured to obtain first vertex information of a target object in a three-dimensional model;
a drawing module 802, configured to draw the target object in the two-dimensional canvas based on the first vertex information and a preset dimension conversion relationship, where the dimension conversion relationship is used to indicate a correspondence relationship between coordinate information in a three-dimensional coordinate system and coordinate information in a canvas coordinate system;
a first splitting module 803, configured to split a target object in a two-dimensional canvas to obtain at least two sub-objects;
a second obtaining module 804, configured to obtain second vertex information of each sub-object;
and a second splitting module 805, configured to split the target object in the three-dimensional model based on the second vertex information and the dimension conversion relationship.
In a specific embodiment, the first splitting module 803 is further configured to determine a ratio of the height and the width of the target object; comparing the ratio with a preset value to obtain a comparison result; the first splitting module 803 is specifically configured to split the target object in the two-dimensional canvas based on the comparison result, so as to obtain a sub-object.
In a specific embodiment, the first splitting module 803 is specifically configured to, when it is determined that the comparison result is that the ratio is greater than the preset value, split the target object in the two-dimensional canvas based on the height of the target object and a first preset height, to obtain a sub-object; under the condition that the comparison result is that the ratio is smaller than or equal to the preset value, splitting the target object in the two-dimensional canvas based on the height of the target object, the first preset height and the second preset height to obtain a sub-object; the height of the target object is greater than or equal to the sum of the first preset height and the second preset height.
In one embodiment, the three-dimensional model comprises: a three-dimensional building model; the target object includes: a floor slab; the first splitting module 803 is specifically configured to determine that the floor slab is a one-way plate when it is determined that the comparison result is that the ratio is greater than the preset value; determining a first segmentation mode corresponding to the unidirectional plate based on the height of the floor slab and a first preset height; splitting a one-way plate in the two-dimensional canvas based on a first splitting mode to obtain a sub-object; determining the floor slab to be a bidirectional plate under the condition that the comparison result is that the ratio is smaller than or equal to the preset value; determining a second segmentation mode corresponding to the bidirectional plate based on the height of the floor slab, the first preset height and the second preset height; and splitting the two-way board in the two-dimensional canvas based on the second splitting mode to obtain the sub-object.
In a specific embodiment, the first splitting module 803 is specifically configured to create at least one temporary cut line based on a first splitting manner; acquiring a click instruction of a mouse in a two-dimensional canvas; converting the temporary cutting line into a cutting line based on the click command so as to split a one-way plate in the two-dimensional canvas; creating at least two temporary cutting lines based on the second cutting mode; acquiring a click instruction; and converting the temporary cutting line into a cutting line based on the click command so as to split the two-way board in the two-dimensional canvas.
In a specific embodiment, the drawing module 802 is specifically configured to determine, based on the dimension conversion relationship, third vertex information corresponding to the first vertex information, where the third vertex information is coordinate information in a canvas coordinate system; removing a value corresponding to the Z axis in the third vertex information to obtain new third vertex information; based on the new third vertex information, the target object is drawn in the two-dimensional canvas.
In a specific embodiment, the second splitting module 805 is further configured to store a value corresponding to the Z axis in the first vertex information; the second splitting module 805 is specifically configured to determine fourth vertex information corresponding to the second vertex information based on the dimension conversion relationship, where the fourth vertex information is coordinate information in a three-dimensional coordinate system; adding the value corresponding to the Z axis into the fourth vertex information to obtain new fourth vertex information; and splitting the target object in the three-dimensional model based on the new fourth vertex information.
Fig. 9 illustrates a physical structure diagram of an electronic device, and as shown in fig. 9, the electronic device may include: a processor (processor)901, a communication Interface (Communications Interface)902, a memory (memory)903 and a communication bus 904, wherein the processor 901, the communication Interface 902 and the memory 903 are communicated with each other through the communication bus 904. The processor 901 may call logic instructions in the memory 903 to perform a method for splitting a target object in a three-dimensional model, the method comprising: acquiring first vertex information of a target object in a three-dimensional model; drawing a target object in a two-dimensional canvas based on the first vertex information and a preset dimension conversion relation, wherein the dimension conversion relation is used for indicating the corresponding relation between coordinate information in a three-dimensional coordinate system and coordinate information in the canvas coordinate system; splitting a target object in a two-dimensional canvas to obtain at least two sub-objects; acquiring second vertex information of each sub-object; and splitting the target object in the three-dimensional model based on the second vertex information and the dimension conversion relation.
In addition, the logic instructions in the memory 903 may be implemented in a software functional unit and stored in a computer readable storage medium when the logic instructions are sold or used as a separate product. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
In another aspect, the present invention further provides a computer program product, which includes a computer program stored on a non-transitory computer readable storage medium, the computer program including program instructions, when the program instructions are executed by a computer, the computer being capable of executing the method for splitting a target object in a three-dimensional model provided in the above embodiments, the method including: acquiring first vertex information of a target object in a three-dimensional model; drawing a target object in a two-dimensional canvas based on the first vertex information and a preset dimension conversion relation, wherein the dimension conversion relation is used for indicating the corresponding relation between coordinate information in a three-dimensional coordinate system and coordinate information in the canvas coordinate system; splitting a target object in a two-dimensional canvas to obtain at least two sub-objects; acquiring second vertex information of each sub-object; and splitting the target object in the three-dimensional model based on the second vertex information and the dimension conversion relation.
In yet another aspect, the present invention further provides a non-transitory computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the method for splitting a target object in a three-dimensional model provided in the foregoing embodiments, where the method includes: acquiring first vertex information of a target object in a three-dimensional model; drawing a target object in a two-dimensional canvas based on the first vertex information and a preset dimension conversion relation, wherein the dimension conversion relation is used for indicating the corresponding relation between coordinate information in a three-dimensional coordinate system and coordinate information in the canvas coordinate system; splitting a target object in a two-dimensional canvas to obtain at least two sub-objects; acquiring second vertex information of each sub-object; and splitting the target object in the three-dimensional model based on the second vertex information and the dimension conversion relation.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A method for splitting a target object in a three-dimensional model is characterized by comprising the following steps:
acquiring first vertex information of a target object in a three-dimensional model;
drawing the target object in a two-dimensional canvas based on the first vertex information and a preset dimension conversion relation, wherein the dimension conversion relation is used for indicating a corresponding relation between coordinate information in a three-dimensional coordinate system and coordinate information in a canvas coordinate system;
splitting the target object in the two-dimensional canvas to obtain at least two sub-objects;
acquiring second vertex information of each sub-object;
splitting the target object in the three-dimensional model based on the second vertex information and the dimension conversion relationship.
2. The method according to claim 1, wherein before splitting the target object in the two-dimensional canvas to obtain at least two sub-objects, the method further comprises:
determining a ratio of a height and a width of the target object;
comparing the ratio with a preset value to obtain a comparison result;
splitting the target object in the two-dimensional canvas to obtain at least two sub-objects, including:
and splitting the target object in the two-dimensional canvas based on the comparison result to obtain the sub-object.
3. The method for splitting a target object in a three-dimensional model according to claim 2, wherein the splitting the target object in the two-dimensional canvas based on the comparison result to obtain the sub-objects comprises:
under the condition that the comparison result is that the ratio is larger than the preset value, splitting the target object in the two-dimensional canvas based on the height of the target object and a first preset height to obtain the sub-object;
under the condition that the comparison result is determined that the ratio is smaller than or equal to the preset value, splitting the target object in the two-dimensional canvas based on the height of the target object, the first preset height and the second preset height to obtain the sub-object;
wherein the height of the target object is greater than or equal to the sum of the first preset height and the second preset height.
4. The method for splitting the target object in the three-dimensional model according to claim 3, wherein the three-dimensional model comprises: a three-dimensional building model;
the target object includes: a floor slab;
splitting the target object in the two-dimensional canvas based on the comparison result to obtain the sub-object, including:
determining the floor slab to be a one-way plate under the condition that the comparison result is that the ratio is larger than the preset value; determining a first segmentation mode corresponding to the unidirectional plate based on the height of the floor slab and the first preset height; splitting the one-way plate in the two-dimensional canvas based on the first splitting mode to obtain the sub-object;
determining the floor slab to be a bidirectional slab under the condition that the comparison result is that the ratio is smaller than or equal to the preset value; determining a second segmentation mode corresponding to the bidirectional plate based on the height of the floor slab, the first preset height and the second preset height; and splitting the bidirectional board in the two-dimensional canvas based on the second segmentation mode to obtain the sub-object.
5. The method for splitting the target object in the three-dimensional model according to claim 4, wherein the splitting the one-way plate in the two-dimensional canvas based on the first splitting manner comprises:
creating at least one temporary cutting line based on the first segmentation mode;
acquiring a click instruction of a mouse in the two-dimensional canvas;
converting the temporary cutting line into a cutting line based on the click command so as to split the one-way board in the two-dimensional canvas;
the splitting the bi-directional panel in the two-dimensional canvas based on the second splitting manner includes:
creating at least two temporary cutting lines based on the second cutting mode;
acquiring the click instruction;
based on the click command, converting the temporary cut line into the cut line so as to split the bidirectional board in the two-dimensional canvas.
6. The method for splitting the target object in the three-dimensional model according to any one of claims 1 to 5, wherein the drawing the target object in the two-dimensional canvas based on the first vertex information and the preset dimension conversion relationship comprises:
determining third vertex information corresponding to the first vertex information based on the dimension conversion relation, wherein the third vertex information is coordinate information in the canvas coordinate system;
removing a value corresponding to the Z axis in the third vertex information to obtain new third vertex information;
drawing the target object in the two-dimensional canvas based on the new third vertex information.
7. The method for splitting a target object in a three-dimensional model according to any one of claims 1 to 5, wherein before splitting the target object in the three-dimensional model based on the second vertex information and the dimension conversion relationship, the method further comprises:
storing a value corresponding to a Z axis in the first vertex information;
the splitting the target object in the three-dimensional model based on the second vertex information and the dimension conversion relationship includes:
determining fourth vertex information corresponding to the second vertex information based on the dimension conversion relationship, wherein the fourth vertex information is coordinate information in the three-dimensional coordinate system;
adding the value corresponding to the Z axis into the fourth vertex information to obtain new fourth vertex information;
splitting the target object in the three-dimensional model based on the new fourth vertex information.
8. A device for splitting a target object in a three-dimensional model is characterized by comprising:
the first acquisition module is used for acquiring first vertex information of a target object in the three-dimensional model;
the drawing module is used for drawing the target object in a two-dimensional canvas based on the first vertex information and a preset dimension conversion relation, and the dimension conversion relation is used for indicating the corresponding relation between coordinate information in a three-dimensional coordinate system and coordinate information in a canvas coordinate system;
the first splitting module is used for splitting the target object in the two-dimensional canvas to obtain at least two sub-objects;
the second acquisition module is used for acquiring second vertex information of each sub-object;
and the second splitting module is used for splitting the target object in the three-dimensional model based on the second vertex information and the dimension conversion relation.
9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements a method of splitting a target object in a three-dimensional model according to any one of claims 1 to 7 when executing the program.
10. A non-transitory computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, implements a method for splitting a target object in a three-dimensional model according to any one of claims 1 to 7.
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