WO2012128421A1

WO2012128421A1 - 3d graphic model spatial rendering device and 3d rendering method

Info

Publication number: WO2012128421A1
Application number: PCT/KR2011/003962
Authority: WO
Inventors: 김성재; 신명석
Original assignee: 주식회사 넥서스칩스
Priority date: 2011-03-22
Filing date: 2011-05-31
Publication date: 2012-09-27
Also published as: KR101227183B1; KR20120107711A

Abstract

A 3D graphic model spatial rendering device comprises: a function calling unit for calling a graphic processing function including a rendering function in order to render a 3D graphic model; a function changing unit for changing the rendering function, which is delivered from the function calling unit, into a first rendering function and a second rendering function in order to generate a first view point image and a second view point image for the 3D graphic model; and a geometry processing unit for performing a first geometry conversion on the 3D graphic module by applying the first rendering function, and performing a second geometry conversion on the 3D graphic model by applying the second rendering function.

Description

3D graphic model stereoscopic rendering device and stereoscopic rendering method

The present invention relates to a 3D graphic model stereoscopic rendering apparatus and a stereoscopic rendering method, and more particularly, to a 3D graphic model stereoscopic rendering apparatus and stereoscopic rendering method capable of converting a single-view image into a left eye image and a right eye image in real time. will be.

Realtime rendering refers to the process of creating a video called raster graphics image in real time from 3D graphic model information using a computer program. The 3D graphic model information is information about a 3D object and may include geometry, viewpoint, texture mapping, lighting, and shading information. Real-time rendering is used in a variety of fields, including architecture, video games, simulators, special effects, and design visualization.

Real-time rendering requires a lot of computation, so we use a graphics accelerator to speed up rendering. The graphics accelerator may be mounted in the form of a hardware chip in the terminal. In order to use the graphic accelerator attached to the terminal in the software platform of the terminal, there is a graphic library for the graphic accelerator, and only the graphic library can be used to utilize the graphic acceleration of the graphic accelerator.

In this case, the graphic library is an implementation of a real-time rendering graphics development API (application programming interface) commonly used in the industry. The accelerator is controlled by a hardware graphics accelerator driver inside the graphics library. The graphics library is divided into data setting functions, state transformation functions, and rendering functions (hereinafter, all these functions are referred to as graphic processing functions). The data setting function sets the model data (3D vertex, etc.), and the state transformation function sets the rendering method. Rendering functions are functions that actually perform rasterization on geometry processing and framebuffers.

Graphics libraries to support graphics accelerators on a single platform are provided by graphics accelerator manufacturers. PC graphics libraries include DirectX and OpenGL. On embedded devices, libraries are mostly provided according to the OpenGL ES specification, and Direct3D Mobile is additionally provided on Windows. As such, there are no more than two graphics libraries that support graphics accelerators on a single platform. Most 3D games are built using only one of these two. Examples of rendering functions among the graphic functions include glDrawArrays and glDrawElements in the case of the OpenGL ES API.

Humans feel a three-dimensional effect by the effect of a single object being seen in different directions due to the gap between the left and right eyes. The stereoscopic image display device displays a left eye image on the left eye of the user and a right eye image on the right eye of the user by using this principle, so that the user feels a 3D effect.

In the case of due diligence, a left eye image and a right eye image of a stereoscopic image may be produced from a production time using a binocular camera. However, it is not easy to convert a single viewpoint image into a stereoscopic image in real time.

The technical problem to be solved by the present invention is a 3D graphics model stereoscopic rendering apparatus and stereoscopic rendering to generate a three-dimensional image in real time by changing the single-view real-time rendering method in the real-time 3D graphics rendering technology to a rendering method for generating left and right eyes image It is to provide a method.

3D graphics model stereoscopic rendering apparatus according to an embodiment of the present invention, a function call unit for calling a graphics processing function including a rendering function for rendering a 3D graphics model, a first viewpoint image and the second for the 3D graphics model A function changer for changing a rendering function received from the function caller into a first rendering function and a second rendering function to generate a view image, and applying the first rendering function to first geometry for the 3D graphic model And a geometry processor configured to perform a transformation, and apply a second rendering function to perform a second geometry transformation on the 3D graphic model.

A first viewpoint image is generated by performing rasterization on the 3D graphic model on which the first geometry transformation has been performed, and a second viewpoint by rasterizing the 3D graphic model on which the second geometry transformation has been performed. The apparatus may further include a raster processor configured to generate an image.

The function caller may further include a data storage to store a call order and data for calling the graphic processing function.

The function caller may call the graphic processing function in the calling order stored in the data storage unit after the first rendering using the first rendering function is performed.

The function changer may change a rendering function of the graphic processing functions called in the calling order to the second rendering function.

The data storage unit may store information on a graphic processing function called by the function caller in units of frames.

In the 3D graphic model stereoscopic rendering method according to another embodiment of the present invention, calling the rendering function to generate a first viewpoint image for the 3D graphic model, and setting the first rendering method by changing the called rendering function Generating a first view image by performing rendering on the 3D graphic model through the first rendering method, and changing the rendering function to generate a second view image of the 3D graphic model. Setting a rendering method, and generating a second viewpoint image by performing rendering on the 3D graphic model through the second rendering method.

The setting of the first rendering method may include changing a viewpoint of the 3D graphic model to a first viewpoint by changing a model view matrix value set before the rendering function is called.

The setting of the first rendering method may further include mapping the 3D graphic model to the virtual space at the first viewpoint by changing a projection matrix value set before the call to the rendering function. can do.

The setting of the first rendering method may further include converting the 3D graphic model to a first viewpoint coordinate system on the screen at the first viewpoint by changing a viewport set before the rendering function is called. .

The setting of the second rendering method may include changing a viewpoint of the 3D graphic model to a second viewpoint by changing a model view matrix value set before the rendering function is called.

The setting of the second rendering method may further include mapping the 3D graphic model to the virtual space at the second viewpoint by changing a projection matrix value set before the call of the rendering function. can do.

The setting of the second rendering method may further include converting the 3D graphic model to a second viewpoint coordinate system on the screen at the second viewpoint by changing a viewport matrix value set before the rendering function is called. Can be.

The setting of the first rendering method may further include storing a calling order in which a graphic processing function including the rendering function is called, and changing a rendering function among graphic processing functions called in the calling order. The second rendering method may be set.

The rendering method according to the viewpoint change may be equally used for rendering for various viewpoints such as the third and fourth in addition to the first and second.

It is possible to generate a three-dimensional image composed of left and right eye images in real time by changing the single-view real-time rendering method of an application (game, graphic program, etc.) using real-time graphic rendering technology into a rendering method for generating left and right eye images without modifying the application. Can be.

1 is a block diagram illustrating a 3D graphic model stereoscopic rendering device according to an embodiment of the present invention.

2 is a flowchart illustrating a 3D graphic model stereoscopic rendering method according to an embodiment of the present invention.

3 is a block diagram illustrating a 3D graphic model stereoscopic rendering device according to another embodiment of the present invention.

4 is a flowchart illustrating a 3D graphic model stereoscopic rendering method according to another embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention.

In addition, in various embodiments, components having the same configuration will be representatively described in the first embodiment using the same reference numerals, and in other embodiments, only components different from the first embodiment will be described. do.

In order to clearly describe the present invention, parts irrelevant to the description are omitted, and like reference numerals designate like elements throughout the specification.

Throughout the specification, when a part is said to "include" a certain component, it means that it can further include other components, without excluding other components unless specifically stated otherwise.

Referring to FIG. 1, the 3D graphic model stereoscopic rendering apparatus 100 includes a function call unit 110, a function change unit 120, a geometry processor 130, and a raster processor 140. do.

The function caller 110 calls a graphics processing function including a rendering function for rendering the 3D graphics model. Graphics processing functions include data setting functions, state transformation functions, and rendering functions. The function call unit 110 may be a rendering interface that receives 3D graphic model information and sets a rendering method of the 3D graphic model.

The 3D graphic model information may include geometry, viewpoint, lighting, shading information, and the like for the 3D graphic model. The 3D graphic model information may be information stored in a specific storage medium, and may be provided to the function call unit 110 in a specific storage medium.

The function caller 110 transmits the called graphic processing function to the function changer 120 and / or the geometry converter 130. In particular, the function call unit 110 transmits a rendering function that performs actual rendering among the called graphic processing functions to the function change unit 120, and other functions to the geometry transformation unit 130.

An embodiment of the present invention describes a case where a rendering function is changed among graphic processing functions. However, the present invention is not limited thereto, and other functions other than the rendering function among graphic processing functions may be transferred to the function changer 120 as necessary.

The function change unit 120 performs stereoscopic transformation of the 3D graphic model in real time. The function changing unit 120 changes the rendering function to the first rendering function and the second rendering function among the graphic processing functions to generate the first view image and the second view image. The function changer 120 may call the first render function and the second render function when the function call unit 110 calls the render function. The first rendering function includes a model view matrix value, a projection matrix value, and a viewport value to generate a first viewpoint image for the 3D graphic model, and the second rendering function generates a second viewpoint image for the 3D graphic model. This includes model view matrix values, projection matrix values, and viewport values. The first rendering function refers to a function that performs rendering by changing a model view matrix value, a projection matrix value, and a viewport value to generate a first view image. The second rendering function refers to a function that performs rendering by changing a model view matrix value, a projection matrix value, and a viewport value to generate a second view image.

The Model-View Matrix is a matrix value that changes the viewpoint of the 3D graphics model, the Projection Matrix is a matrix value that maps the 3D graphic model to the virtual space, and the viewport is a 3D graphic. This value converts the model to the coordinate system on the screen. The meaning of the viewport may include a clip area.

The first view image refers to any one of a left eye image and a right eye image, and the second view image refers to the other. The stereoscopic image is displayed by combining the first viewpoint image and the second viewpoint image.

In this case, the projection matrix value and the viewport value change may be determined according to the format of the final stereoscopic image. In general, the form of Side by side (left half of the whole area is left or right eye image, right half is right or left eye image), and Top-down (upper half of the whole area is left or right eye image, lower half is right or left eye image) The projection matrix value and the viewport value may be determined, and the projection matrix value and the viewport value may be set for other area division.

That is, the function changer 120 moves / rotates the 3D graphic model to the left eye viewpoint position before the geometry processing to generate a left eye image, and moves / rotates the 3D graphic model to the right eye view point to the right eye. The model view matrix can be changed to generate an image. At this time, the rotation can be rotated to match the focus position. The focus position can be set automatically by specifying an arbitrary point or by finding the nearest point using Depth information of the rendering device. And / or the function changer 120 may change the model view matrix value such that the camera position is set to move to the left eye view or the right eye view with respect to the 3D graphic model.

The function changing unit 120 changes the projection matrix value so that the 3D graphic model is mapped to the cube at the changed time point according to the movement / rotation of the 3D graphic model and / or the position setting of the camera. The cube to which the 3D graphic model is mapped refers to a virtual space in which a left eye image or a right eye image is displayed. The function changing unit 120 changes the viewport so that the 3D graphic model is converted into a coordinate system on the screen at the left eye view or the right eye view. At this time, both the projection matrix value and the viewport value may be changed, or only one of them may be changed.

The function changer 120 changes the model view matrix value, the projection matrix value, and the viewport value corresponding to the left eye view and the right eye view with respect to the rendering functions transferred from the function caller 110 and transmits them to the geometry processor 130. do. Here, the function changer 120 transmits the model view matrix value, the projection matrix value, and the viewport value changed for the left and right eyes to the geometry processor 130 twice.

As such, the model view matrix value, the projection matrix value, and the viewport are changed with respect to the first viewpoint (left eye) in the function changer 120 to set a first rendering method for generating a first viewpoint image for the 3D graphic model. do. After the first view image is generated, the model view matrix value, the projection matrix value, and the viewport for the second view point (right eye) are changed to set a second rendering method for generating a second view image for the 3D graphic model.

The geometry processor 130 performs geometry transformation on the 3D graphic model. Geometry transformation is the process of transforming a 3D graphic model using affine transformation. Affine transformations include translation, zooming and rotation transformations of figures. Geometry transformations include model-view transformations, lighting calculations, projection transformations, clip tests, and view port transformations for 3D graphical models. do.

Model view conversion is a process of converting a viewpoint of a 3D graphic model. The illumination calculation is a process of calculating the direction and amount of projection light, the direction and amount of reflected light, the ambient light, etc., projected onto the 3D graphic model from a predetermined light source such as a point light source, a parallel light source, a concentrated light source, and the like. Projection transformation is a process of mapping an object in the camera (field frustum) to a cube, resulting in a perspective effect in which an object located near the camera is enlarged by the projection transformation. Clip testing is the process of cutting out invisible and invisible parts of the mapped cube in the 3D graphics model for viewport transformation.

Viewport transformation is the process of converting a projection-converted 3D graphic model into a coordinate system on the screen.

The geometry processor 130 converts the 3D graphic model into vector graphics through geometry transformation. Vector graphics are a way to mathematically express the position, length, and direction of a line. That is, the geometry processor 130 may perform geometry transformation by using a model view transformation function, an illumination calculation function, a projection transformation function, a clip test function, and a viewport transformation function that perform each process. In particular, the modelview transform function and the projection transform function may be represented by a 4 × 4 matrix that transforms the coordinates of the 3D graphic model.

The geometry processor 130 may use a geometry engine that speeds up geometry transformation by hardware.

The geometry processor 130 performs a first geometry transformation on the 3D graphic model by applying a first rendering function including a model view matrix value change, a projection matrix value, and a viewport change to the first viewpoint (left eye). The geometry processor 130 performs a second geometry transformation on the 3D graphic model by applying a second rendering function including a model view matrix value change, a projection matrix value, and a viewport change to the second viewpoint (right eye).

The raster processor 140 performs rasterization on the 3D graphic model converted into vector graphics by the geometric transformation. Rasterization is the process of converting vector graphics into pixel pattern images. That is, the raster processor 1 40 performs a process of pasting a polygon of a 3D graphic model, which has not existed, corresponding to a pixel on the screen. Polygon means the smallest unit of polygon that represents a 3D graphic model. Rasterization is performed on the 3D graphic model on which the first geometry transformation is performed to generate a first viewpoint image (left eye image). The rasterization is performed on the 3D graphic model on which the second geometry transformation is performed to generate a second viewpoint image (right eye image). The raster processor 140 transfers the rasterized left eye image and the right eye image to the frame buffer 160 so that the left eye image and the right eye image are generated in real time in the frame buffer 160.

The raster processing unit 140 may use a raster engine that speeds up the rasterization conversion by hardware.

The frame buffer 160 temporarily stores the left eye image and the right eye image generated by the 3D graphic model rendering apparatus 100 and transmits them to the display unit 170.

The display unit 170 displays the left eye image and the right eye image generated in the frame buffer 160. The display unit 170 includes a stereoscopic image display apparatus using special glasses and a stereoscopic image display apparatus not using special glasses. The stereoscopic image display apparatus using the special glasses allows the left eye image and the right eye image to be separately selected by using a sunglasses, a polarized glasses, a shutter glasses. A stereoscopic image display device that does not use special glasses is selected such that a left eye image, an image, and a right eye image are separately selected using a lenticular sheet method, a bac k light distribution method, a slit barrier method, or the like. do.

A method of rendering a 3D graphic model according to an exemplary embodiment of converting an image of a single viewpoint into a left eye image and a right eye image in real time will now be described with reference to FIGS. 1 and 2.

1 and 2, the 3D graphic model stereoscopic rendering apparatus 100 receives 3D graphic model information and calls the graphic processing function from the function call unit 110 in which the graphic processing function is defined (S110). In this case, the function call unit 110 transmits the corresponding rendering function to the function change unit 120.

The 3D graphic model stereoscopic rendering apparatus 100 changes the model view matrix value and the projection matrix value to change the viewpoint to the first viewpoint (S120). In the function changer 120, the model view matrix value, the projection matrix value, and the viewport value are changed in each of the left and right eyes.

The function changing unit 120 changes the viewpoint of the 3D graphic model to the first viewpoint by changing the model view matrix value set before the rendering function is called. That is, the function changer 120 rotates the 3D graphic model in a first direction (counterclockwise or clockwise) with respect to an axis and moves the camera position to a first viewpoint (left eye view or right eye view). Change the model view matrix value. That is, the 3D graphic model stereoscopic rendering apparatus 100 changes the viewpoint of the 3D graphic model to the first viewpoint according to the change of the model view matrix value.

The function changing unit 120 changes the projection matrix value so that the 3D graphic model is mapped to a cube (virtual space) at the first viewpoint. That is, the function changer 120 changes the projection matrix value set before the rendering function is called to map the 3D graphic model to the virtual space at the first viewpoint.

The 3D graphic model stereoscopic rendering apparatus 100 performs a viewport change so that the 3D graphic model is converted into a coordinate system on the screen at the first viewpoint (S130). That is, the function change unit 120 changes the viewport set before the rendering function is called so that the 3D graphic model is converted into the first view coordinate system on the screen at the first view.

The 3D graphic model stereoscopic rendering apparatus 100 performs rendering on the first viewpoint image (S140). That is, the 3D graphic model stereoscopic rendering apparatus 100 sets a first rendering method for generating a first viewpoint image by changing a model view matrix value, a projection matrix value, and a viewport value to generate a first viewpoint image. do. The 3D graphic model stereoscopic rendering apparatus 100 generates a first view image by rendering the 3D graphic model through a first rendering method.

The 3D graphic model stereoscopic rendering apparatus 100 changes the model view matrix value and the projection matrix value to change the viewpoint to the second viewpoint (S150). The function change unit 120 changes the viewpoint of the 3D graphic model to the second viewpoint by changing the model view matrix value set before the rendering function is called. That is, the function changer 120 rotates the 3D graphic model in a second direction (counterclockwise or clockwise) with respect to an axis and moves the camera to a second viewpoint (left eye view or right eye view). You can change the model view matrix value. The 3D graphic model stereoscopic rendering apparatus 100 may change the viewpoint of the 3D graphic model to the second viewpoint according to the change of the model view matrix value.

The function changing unit 120 changes the projection matrix value set before the rendering function is called so that the 3D graphic model is mapped to the virtual space at the second viewpoint at the second viewpoint.

The 3D graphic model stereoscopic rendering apparatus 100 performs a viewport change so that the 3D graphic model is converted into a coordinate system on the screen at the second viewpoint (S160). That is, the function changer 120 changes the viewport matrix value set before the rendering function is called so that the 3D graphic model is converted into the second view coordinate system on the screen at the second view.

The 3D graphic model stereoscopic rendering apparatus 100 performs rendering on the second viewpoint image (S170). That is, the 3D graphic model stereoscopic rendering apparatus 100 applies a second rendering method for generating a second viewpoint image by applying a model view matrix value change, a projection matrix value change, and a viewport value change to generate a second viewpoint image. Set it. The 3D graphic model stereoscopic rendering apparatus 100 generates a second view image by rendering the 3D graphic model through the second rendering method.

The generated first view image and the second view image are temporarily stored in the frame buffer 160 and transferred to the display unit 170, and the display unit 170 displays a stereoscopic image by the first view image and the second view image. do.

As such, by changing the rendering function for the 3D graphic model, a single view rendering method may be changed to a rendering method for generating left and right eye images to generate a stereoscopic image composed of left and right eyes in real time.

Referring to FIG. 3, the 3D graphic model stereoscopic rendering apparatus 200 includes a function caller 210, a function changer 220, a geometry processor 230, a raster processor 240, and a data storage 250. do. The 3D graphic model stereoscopic rendering apparatus 200 further includes a data storage unit 250 as compared with FIG. 1. The description will be made mainly on the difference compared to FIG. 1, and parts not described may be interpreted according to the description of FIG. 1.

The data storage unit 250 stores information about the graphic processing function called by the function call unit 210 during the process of generating the first view image. The information on the graphic processing function includes a call order and data information of the graphic processing function called by the function caller 210. That is, the data storage unit 250 may store a call order and data information of the graphic processing function called by the function caller 210. The data storage unit 250 may store information about a graphic processing function called by the function caller 210 in one frame unit of a left eye image or a right eye image. The data information includes the function, state, data, etc. of the rendering function. As described with reference to FIG. 2, the generation process of the first view image includes a first rendering method in which a model view matrix value, a projection matrix value, and a viewport value are changed with respect to the first view point, and the changed model view matrix, projection matrix, and viewport are applied. As such, the rendering of the 3D graphic model is performed. That is, the graphic processing function that is called while the first view image is generated includes a function for transforming geometry. Functions for geometric transformation include model view transformation function, lighting calculation function, projection transformation function, clip test function, viewport transformation function, and so on.

The graphic processing function information stored in the data storage unit 250 is transferred to the function call unit 210 in the process of generating the second view image.

The function caller 210 sequentially calls the graphic processing function by using the graphic processing function information stored in the data storage 250, that is, the calling order and data information of the graphic processing function, and generates a second view image. 2 Rendering method can be set. That is, the function call unit 210 may call the graphic processing functions stored in the data storage unit 250 in the stored calling order after the first rendering using the first rendering function is performed. The function caller 210 transmits a rendering function among the called graphic processing functions to the function changer 220 and / or the geometry converter 230.

In the process of generating the second view image, the function changing unit 220 changes the rendering function among the graphic processing functions that are called in the calling order from the function caller 210 to the second rendering function. The function changer 220 changes the model view matrix value, the projection matrix value, and the viewport value to the geometry processor 230 to generate the second view image.

The geometry processor 230 may perform geometry transformation on the 3D graphic model in a second rendering method to which the changed function is applied to generate the second view image.

That is, except for the rendering function to be transferred to the function changer 120 for generating the second view image, the functions used in the process of generating the first view image may be used.

3 and 4, a three-dimensional rendering method of a 3D graphic model according to another exemplary embodiment of converting an image of a single viewpoint into a left eye image and a right eye image in real time will be described.

3 and 4, the 3D graphic model stereoscopic rendering apparatus 200 receives 3D graphic model information and calls the graphic processing function from the function caller 210 in which the graphic processing function is defined (S210). In this case, the function call unit 210 transmits a rendering function for the 3D graphic model to the function change unit 220.

The 3D graphic model stereoscopic rendering apparatus 200 stores the graphic processing function information called by the function call unit 210 in the data storage unit 250 during the process of generating the first view image (S220). The graphics processing function that is called may include a modelview transform function, a light calculation function, a projection transform function, a clip test function, a viewport transform function, and the like, for geometric transformation.

The 3D graphic model stereoscopic rendering apparatus 200 changes the model view matrix value and the projection matrix value to change the viewpoint to the first viewpoint (S230). That is, the function changer 220 rotates the 3D graphic model in a first direction (counterclockwise or clockwise) with respect to an axis and moves the camera position to a first viewpoint (left eye view or right eye view). Change the model view matrix value. The function change unit 220 changes the projection matrix value so that the 3D graphic model is mapped to the virtual space of the first view at the first view.

The 3D graphic model stereoscopic rendering apparatus 200 performs a viewport change so that the 3D graphic model is converted into a coordinate system on the screen at the first viewpoint (S240). That is, the function change unit 220 changes and changes the viewport value so that the 3D graphic model is converted into the first view coordinate system on the screen at the first view.

The 3D graphic model stereoscopic rendering apparatus 200 performs rendering on the first viewpoint image (S250). The 3D graphic model stereoscopic rendering apparatus 200 may set the first rendering method for generating the first viewpoint image by applying the changed model view matrix value, the projection matrix value, and the viewport value to generate the first viewpoint image. The 3D graphic model stereoscopic rendering apparatus 200 generates a first view image by rendering a 3D graphic model through a first rendering method.

The 3D graphic model stereoscopic rendering apparatus 200 recalls the graphic processing function using the graphic processing function information stored in the data storage unit 250 (S260). That is, the 3D graphic model stereoscopic rendering apparatus 200 may sequentially call the graphic processing function using the graphic processing function information stored in the data storage 250, that is, the calling order and data information of the graphic processing function. In this case, the function call unit 210 transmits a rendering function for the 3D graphic model to the function change unit 220.

The 3D graphic model stereoscopic rendering apparatus 200 changes the model view matrix value and the projection matrix value to change the viewpoint to the second viewpoint (S270). That is, the function changing unit 220 rotates the 3D graphic model in a second direction (clockwise or counterclockwise) with respect to an axis and moves the camera position to a second viewpoint (right eye view or left eye view). Change the model view matrix value. The function changing unit 220 changes the projection matrix value so that the 3D graphic model is mapped to the virtual space of the second viewpoint at the second viewpoint.

The 3D graphic model stereoscopic rendering apparatus 200 changes the viewport value so that the 3D graphic model is converted into a second viewpoint coordinate system on the screen at the second viewpoint (S280). That is, the function change unit 220 changes the viewport value so that the 3D graphic model is converted into a coordinate system on the screen at the second time point.

The 3D graphic model stereoscopic rendering apparatus 200 performs rendering on the second viewpoint image (S290). The 3D graphic model stereoscopic rendering apparatus 200 may set a second rendering method for generating the second view image by applying the changed model view matrix value, the projection matrix value, and the viewport value to generate the second view image. The 3D graphic model stereoscopic rendering apparatus 200 generates a second viewpoint image by rendering the 3D graphic model through the second rendering method.

The rendering method according to the viewpoint change may be equally used for rendering for various viewpoints such as a third viewpoint and a fourth viewpoint in addition to the first viewpoint and the second viewpoint. The viewpoint change method of the third viewpoint and the fourth viewpoint or more is the same as the method according to the viewpoint change, and when the graphic processing function is stored, the second viewpoint, the third viewpoint, or the fourth viewpoint or more is stored by using the information stored in the first rendering. The same can be used for changing the viewpoint.

The generated first view image and the second view image are temporarily stored in the frame buffer 260 and transferred to the display unit 270, and the display unit 270 displays a stereoscopic image by the first view image and the second view image. do.

DETAILED DESCRIPTION OF THE INVENTION The detailed description of the invention and the drawings so far referred to are merely illustrative of the invention, which is used only for the purpose of illustrating the invention and is intended to limit the scope of the invention as defined in the claims or claims. It is not. Therefore, those skilled in the art will understand that various modifications and equivalent other embodiments are possible. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

Claims

A function caller for calling a graphics processing function including a rendering function for rendering a 3D graphic model;

A function changer for changing a rendering function received from the function caller into a first rendering function and a second rendering function to generate a first view image and a second view image of the 3D graphic model; And

3D graphics including a geometry processing unit for applying the first rendering function to perform a first geometry transformation on the 3D graphics model, and applying a second rendering function to perform a second geometry transformation on the 3D graphics model. Model stereoscopic rendering device.
The method of claim 1,

A first viewpoint image is generated by performing rasterization on the 3D graphic model on which the first geometry transformation has been performed, and a second viewpoint by rasterizing the 3D graphic model on which the second geometry transformation has been performed. 3D graphics model stereoscopic rendering apparatus further comprising a raster processing unit for generating an image.
According to claim 1,

And a data storage unit for storing a call order and data for the function caller to call the graphic processing function.
The method of claim 3, wherein

And the function caller calls the graphic processing function in the calling order stored in the data storage after the first rendering using the first rendering function is performed.
The method of claim 4, wherein

And the function changer changes the rendering function of the graphic processing functions called in the calling order to the second rendering function.
The method of claim 4, wherein

And the data storage unit stores information on a graphics processing function called by the function caller in units of frames.
Setting a first rendering scheme by calling a rendering function and changing the called rendering function to generate a first viewpoint image for the 3D graphic model;

Generating a first view image by performing rendering on the 3D graphic model through the first rendering method;

Setting a second rendering scheme by changing the rendering function to generate a second viewpoint image for the 3D graphic model; And

And generating a second viewpoint image by performing the rendering on the 3D graphic model through the second rendering method.
The method of claim 7, wherein

The setting of the first rendering method may include:

And changing the viewpoint of the 3D graphic model to the first viewpoint by changing a model view matrix value set before the rendering function is called.
The method of claim 8,

The setting of the first rendering method may include:

And changing the projection matrix value set before the call of the rendering function to map the 3D graphic model to the virtual space of the first view at the first view.
The method of claim 9,

The setting of the first rendering method may include:

And changing the viewport set before the call to the rendering function to convert the 3D graphic model to a first view coordinate system on a screen at the first view.
The method of claim 7, wherein

The setting of the second rendering method may include:

And changing the viewpoint of the 3D graphic model to a second viewpoint by changing a model view matrix value set before the rendering function is called.
The method of claim 11,

The setting of the second rendering method may include:

And changing the projection matrix value set before the call of the rendering function to map the 3D graphic model to the virtual space of the second view at the second view.
The method of claim 12,

The setting of the second rendering method may include:

And converting the 3D graphic model to a second view coordinate system on a screen at the second view point by changing a viewport matrix value set before the rendering function is called.
The method of claim 7, wherein

The setting of the first rendering method may include:

Storing a call order in which a graphics processing function including the rendering function is called;

3D graphics model stereoscopic rendering method of setting the second rendering method by changing a rendering function of the graphics processing functions to be called in the calling order.