Three-dimensional model perspective projection method, system and related device

Abstract

The three-dimensional model perspective projection method provided by the invention comprises the following steps: obtaining an original projection image of a three-dimensional model by utilizing camera viewpoint parameter information and the three-dimensional model; When the camera viewpoint parameter information is changed, obtaining a projection image of the three-dimensional model by using thechanged camera viewpoint parameter information and the three-dimensional model; Determining a scaling matrix by using the projection image and the three-dimensional model; And multiplying the three-dimensional model by the scaling matrix to adjust the size of the projection image to be consistent with the size of the original projection image. Therefore, the method is simple to operate, only onescaling matrix needs to be calculated to keep the size of the projection image unchanged, the technical processing time can be shortened, and then the working efficiency is improved. The invention further provides a three-dimensional model perspective projection system and device and a computer readable storage medium which all have the above beneficial effects.

Description

technical field [0001] The present application relates to the technical field of 3D scene rendering, in particular to a 3D model perspective projection method, system, device and computer-readable storage medium. Background technique [0002] In order to make the 3D model projected onto the 2D screen after passing through the model view matrix and the perspective projection matrix, no matter whether the camera viewpoint is near or far away, a general method of keeping the size of the projected model constant and always facing the screen is as follows: Billboard technology (Billboard), it is a method of fast drawing in the field of computer graphics, its principle is to establish a drawing area (rectangular plane) on the XOY plane, and render an area of ​​a map on this area, And this rectangular plane should face the camera. When rendering, rotate this rectangle in real time according to the camera direction so that it always faces the camera. [0003] The current general-pu...

AI Technical Summary

Problems solved by technology

[0003] The current general-purpose billboard technology mainly deals with the problem of invariant orientation. When the camera is in perspective projection mode, in order to ensure that the size of the projected model remains unchanged, the billboard technology is complicated to operate and needs to determine multiple scaling matrices, resulting in Technical processing time is too long, reducing work efficiency

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