OpenGL model transformation-based method and system for acquiring three-dimensional coordinate

Abstract

The invention discloses an openGL model transformation-based method and system for acquiring a three-dimensional coordinate. The method comprises the following steps: receiving an anchor coordinate in a coordinate system of an openGL model; according to the anchor coordinate, determining a model three-dimensional coordinate with the anchor as an original point; transforming the model three-dimensional coordinate into a view three-dimensional coordinate under a view coordinate system; receiving a view window size; according to the view window size, determining the three-dimensional coordinate axis length of the view three-dimensional coordinate; and on the basis of the three-dimensional coordinate axis length, displaying the view coordinate to obtain a three-dimensional coordinate in a world coordinate system. Therefore, a problem of high efficient mechanism of three-dimensional coordinate axis length calculation based on an openGL spatial transformation technology, so that it is convenient to edit the three-dimensional model and accelerate a speed of processing on the whole model; and moreover, the manufacturing period of the three-dimensional model can be shortened and usability of the model is improved.

Description

technical field [0001] The invention relates to the field of post-video special effect processing and synthesis software, in particular to the field of radio and television, and in particular to a three-dimensional coordinate acquisition method and system for OpenGL model transformation. Background technique [0002] In order to achieve realistic image synthesis effects in post-video special effects processing and synthesis software, users are often provided with a means of synthesizing images in three-dimensional space, which is generally called a three-dimensional synthesizer. Users can add any number of 3D objects in the 3D synthesizer, such as planes, cubes, spheres, and 3D objects imported from 3D model files, etc., and add material properties, lighting, and effects to these 3D objects. The texture composed of the image can synthesize a realistic three-dimensional scene graph. The key point of the 3D synthesizer is that users can use the mouse to interactively edit 3D ...

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Problems solved by technology

[0004] Aiming at the existing problems and limitations of the method for establishing a three-dimensional coordinate axis manipulator in the prior art, the technical problem to be solved in the present invention is: solve the problem of an efficient mechanism for calculating the length of a three-dimensional coordinate axis based on OpenGL space transformation technology

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