Real-time dynamic shadowing realization method based on projector lamp

Abstract

The invention discloses a real-time dynamic shadowing realization method based on a projector lamp. The method mainly comprises the following steps that: a visible object list in a scene is traversed, and only visible objects or partial visible objects in the scene are rendered; when the scene is rendered in a lamp light space, a depth diagram projected by all pixels nearest to a light source is obtained; when the scene is rendered normally, depth values of new positions of the pixels obtained when a camera space is converted into the lamp light space are compared, and when the depth values of the new positions of the pixels are greater than the depth diagram, the pixels are in a shadow; and then, the shadow and the scene are subjected to color mixing and are protected onto a screen. The real-time dynamic shadowing realization method based on the projector lamp can overcome the defects of narrow use range, easy mistake making, great occupied memory, slow calculation speed and the like in the prior art, so that the method realizes the advantages that the use range is wide; mistakes cannot be easily made; the occupied memory is small; and the calculation speed is high.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to a method for realizing real-time dynamic shadows based on spotlights. Background technique [0002] With the development of computer graphics and the continuous popularization of programming, the virtual three-dimensional world simulates the reality of reality, and more visual performances are realized in games. In recent years, more and more studies on shadows have been made. The realization of this effect It increases the three-dimensionality and layering of the image, and real-time shadow calculation is an advanced topic in the field of computer graphics. [0003] At present, the game is realized by using the Z-buffer blanking algorithm. It is a coordinate system established with a point on the Z axis of the new coordinate system as the center of the circle. All points of the object in space are centered on the light source to the new coordinate system XY Plane proje...

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Problems solved by technology

[0004] In the process of realizing the present invention, the inventor found that there are at least defects in the prior art such as narrow use range, error-prone, large memory occupation and slow calculation speed.

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