Transform Feedback Example—Particle System

This section contains the description of a moderately complex use of transform feedback. The application uses transform feedback in two ways to implement a particle system. On a first pass, transform feedback is used to capture geometry as it passes through the OpenGL pipeline. The captured geometry is then used in a second pass along with another instance of transform feedback in order to implement a particle system that uses the vertex shader to perform collision detection between particles and the rendered geometry. A schematic of the system is shown in Figure 5.19.

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Figure 5.19. Schematic of the particle ...

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