31 results about "Shading language" patented technology

The invention provides a three-dimensional terrain model real-time smooth drawing method with combination of a GPU technology, and belongs to the technical field of image processing. The objective of the invention is to provide the three-dimensional terrain model real-time smooth drawing method with combination of the GPU technology so that cache reuse in multiple times of drawing can be realized based on the current popular programmable GPU technology with a global digital elevation model acting as a data source, and load of computation space is effectively reduced. The method comprises the steps of construction of a multi-resolution pyramid model, elimination of image noise points, filtering of images, partitioning of planar projection of the earth according to equal latitude and longitude, and construction of different hierarchical levels of pyramid layers according to a mode from the top to the bottom. Acceleration and enhancement of terrain rendering are realized based on the programmable GPU technology, i.e. all phases of a graphical drawing pipeline are controlled by using shader languages, two and textures are respectively generated by vertex information and index information of elevation data to be stored in video memory for scheduling of whole terrain drawing; and vertex interpolation and migration are performed in the geometric phase by utilizing a curved surface subdivision and fractal technology so that procedural details are generated and the phenomenon of edges and corners of the terrain mesh when resolution is insufficient can be compensated.

A software application that allows users to create shader definitions using an intuitive graphical user interface. The invention is characterized by an intuitive user interface with a streamlined workflow that non-technical users (artists) are able to understand and utilize without the need to become technically proficient in computer software expression. This interface allows the user to create a shader graphically without writing code, by wiring predefined filter, assembly and property primitives together into a dynamic, directed wire graph. A high level code definer writes an XML (for example) script for the defined wire graph. The output produced by the system is translated into a shader program implemented in a format that is recognized by some other rendering system. Typically this means a shader program represented as a text file containing code in some specific shader language. The system is able to generate output targeted for specific platforms based on a single graphical representation of the shader program created by the user.

The efficiency of shading and rendering processes can be improved through implementing object oriented programming for shading program languages. Computer graphics data representing a geometric model in a scene are determined and assigned to object oriented classes and subclasses and are subsequently sorted and grouped into several (e.g., two or more) groups based on the classification information. Once the computer graphics data are assigned in a class and / or subclasses and grouped, a shader interpreter implements SIMD operators on each group of data values.

The invention discloses a spacecraft solar panel three-dimensional dynamic simulation method taking a shielding effect into consideration, belongs to the technical field of computer simulation, and solves the problems that the power generating efficiency is estimated inaccurately caused by complex analyzing tasks of the existing shielding situations generated by a satellite orbit and a large-scale mechanism. According to the technical main points, the method comprises the following steps: building a realization environment; performing three-dimensional virtual modeling on a spacecraft; displaying a spacecraft body, a solar panel and an antenna in real time; calculating a sheltering matrix through a shadow shielding algorithm; performing visual rendering based on solar panel shadow of shading language; performing multi-view-angle interactive three-dimensional roaming; displaying the power and a temperature curve of the solar panel in real time. According to the method, the analyzing tasks of the shielding situations generated by the satellite orbit and the large-scale mechanism are realized, the power generating power of solar batteries is calculated according to a shielding analysis result, and the number of the solar batteries is designed reasonably.

The invention provides a three-dimensional terrain model real-time smooth drawing method with combination of a GPU technology, and belongs to the technical field of image processing. The objective of the invention is to provide the three-dimensional terrain model real-time smooth drawing method with combination of the GPU technology so that cache reuse in multiple times of drawing can be realized based on the current popular programmable GPU technology with a global digital elevation model acting as a data source, and load of computation space is effectively reduced. The method comprises the steps of construction of a multi-resolution pyramid model, elimination of image noise points, filtering of images, partitioning of planar projection of the earth according to equal latitude and longitude, and construction of different hierarchical levels of pyramid layers according to a mode from the top to the bottom. Acceleration and enhancement of terrain rendering are realized based on the programmable GPU technology, i.e. all phases of a graphical drawing pipeline are controlled by using shader languages, two and textures are respectively generated by vertex information and index information of elevation data to be stored in video memory for scheduling of whole terrain drawing; and vertex interpolation and migration are performed in the geometric phase by utilizing a curved surface subdivision and fractal technology so that procedural details are generated and the phenomenon of edges and corners of the terrain mesh when resolution is insufficient can be compensated.

The invention provides a three-dimensional dynamic simulation method for a submarine-launched missile exiting the water process, relating to a three-dimensional dynamic simulation method. This method is to solve the problems of complex test equipment, high test cost and poor repeatability required for ground simulation tests. The three-dimensional dynamic simulation method of the submarine-launched missile's water exit process is realized based on the CPU-GPU heterogeneous multi-threaded development environment. The method includes the following contents: 1. Building a human-computer interaction platform; Modeling and display; 3. Particle system-based visual modeling of submarine-based missiles exiting water; 4. Visual modeling of submarine-based missiles exiting cavitation bubbles based on coloring language; 5. Dynamic display of ocean depth scales; 6. Process of submarine-based missiles exiting water 7. Visualization of the key parameters of the submarine-based missile's water exit process. The invention has the advantages of being safe, economical, controllable, non-destructive, allowing multiple repetitions, and the like. The invention can be applied to the technical field of computer simulation method.

An embodiment of the present application provides a coloring language translation method. In the coloring language translation method, the abstract syntax tree of the code file of the original coloring language is obtained, and the keywords of the nodes in the abstract syntax tree are analyzed to obtain the coloring language information contained in the code file of the original coloring language. Combined with the set information mapping rules, the coloring language information can be translated to obtain a code file of another coloring language. In this process, the node analysis is performed based on the abstract syntax tree, and the original grammatical structure of the code file of the original coloring language is preserved. At the same time, based on the analysis of node keywords, the corresponding translation between different types of information is realized, which is conducive to improving the readability of translation results; in addition, the information mapping rules can be updated according to actual needs, improving It improves the scalability of the language translation method, and supports the new coloring language syntax conveniently and quickly.

The invention provides a texture image binding method, device and readable storage medium. It is used to provide a simple and accurate method for binding texture images. The method is applied to the Direct3D11 software platform, including: determining the first texture of the Texture2D type in a shader script based on the high-level shader language HLSL, and obtaining all The name of the first texture, based on the correspondence between the texture name and the register index, determine the first register index corresponding to the first texture; based on the object-oriented programming language C++, create the ID3D11Texture2D type corresponding to the first texture Create a texture view corresponding to the second texture; bind the first texture and the second texture based on the register index of the first texture and the texture view.

The invention provides a graphics processing method and device. The graphics processing method provided by the present invention includes: reading the program code of the graphics assembly language AGAL, ​​the program code including the data information and instruction code of the AGAL; according to the corresponding relationship between the AGAL and the coloring language GLSL, converting the The program code of the above-mentioned AGAL is converted into the program code of GLSL for the graphics program interface OpenGL; the GLSL is executed by the graphics processor GPU. The embodiment of the present invention solves the problem that the graphics processing method in the prior art cannot directly execute the AGAL language through GPU for three-dimensional rendering, which leads to the low practicability of AGAL based on Stage 3D technology, and correspondingly improves the performance of Stage 3D technology. flexibility.

The invention provides a color calibration optimization algorithm based on a projector-camera system, which is used for eliminating influence on immersion and reality sense of an observer caused by color difference of a display system of a large multi-projection screen. In the invention, for the problem of neglecting influence of a camera in the previous algorithm, a high dynamic range image (HDRI) synthesis algorithm based on Pedro image segmentation is proposed so as to establish a mapping relation between an input pixel and an output pixel of the camera; brightness and chrominance of a projector are calibrated at the same time by virtue of a combined function approximation method for a YUV (luminance and chrominance) color space transformation model so as to generate a color lookup table (CLUT); graphic processing unit (GPU) rendering for color calibration is realized based on shading language; and finally the three-channel annular multi-projection screen is taken as an experimental platform to verify effectiveness of the algorithm.

The invention discloses a screen-based three-dimensional linear symbol rendering method, which utilizes a shader language to realize high-efficiency high-quality rendering of linear map symbols in a three-dimensional map. The method includes the steps of establishing a mapping relation between vector line segments and a terrain unit, and encoding vector nodes and indexes, thereby forming node texture and index texture; in a fragment shader, searching and reestablishing vector line segments associated with a current fragment; performing grouping and ranking on vector line segment indexes, solving texture coordinates of line segment nodes in the node texture, and reading node attributes from the node texture; and selecting corresponding rendering functions according to symbol types of the associated line segments, and arranging a calculation sequence according to priority. Through direct calculation of screen fragments, the screen-based three-dimensional linear symbol rendering method provided by the invention can realize lamination rendering of linear symbols in a terrain rendering process. In addition, precise spatial position relation calculation and flexible fragment operation meet rendering of different types of linear symbols, and ensure efficiency of real-time rendering.

The invention discloses a cross-platform modularized shader language general integration method which comprises the following steps: defining the format and grammar of a macro definition analysis file, and creating the macro definition analysis file; creating a grammar parser Shader-X, and pre-compiling a shader file by using the Shader-X parser; analyzing the macro definition analysis file, generating a macro definition result set, and generating a macro definition result ordered list according to the macro definition result set; respectively calculating hash values of the ordered list of the macro definition results, generating shader files of the platforms corresponding to the macro definition results respectively according to the macro definition results, pre-compiling the shader files into binary files through a Shader-X analyzer, and marking the binary files through the Hash values of the macro definition results and the platforms; and locating and executing the binary file by the rendering program according to the hash value of the macro definition result ordered list and the platform. The same shader code can be used on different platforms, online compiling is not needed, a modular programming scheme is supported, and the shader programming efficiency is improved.

The embodiment of the invention discloses a video frame rendering method and a video frame rendering device. The video frame rendering method comprises the following steps: receiving a rendering instruction of a user and a to-be-rendered video frame; analyzing the rendering instruction, and determining special effects corresponding to the video frame and an action time interval of each special effect; extracting the identifier information of the determined special effects, and determining GLSL (open graphics library shading language) programs corresponding to the special effects, wherein each special effect corresponds to one GLSL program; respectively judging whether each special effect corresponding to the video frame meets a preset rule according to the action time interval of each special effect and the extracted identifier information of each special effect; combining the GLSL programs corresponding to the special effects which meet the preset rule to obtain a combined GLSL program; executing the combined GLSL program and the GLSL programs corresponding to the special effects which do not meet the preset rule to obtain a rendered special-effect frame. According to the technical scheme, the execution frequency of the GLSL programs is reduced, and the transfer frequency of repeating data is reduced, so that the rendering efficiency is improved.