opengl example "dynamicParticlesRetained" not better than immediate version

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mschissler

opengl example "dynamicParticlesRetained" not better than immediate version

in Core Library Questions • 16 days ago

hi, can anyone explain me why the dynamicParticlesRetained-example has almost the same frameRate as the dynamicParticlesImmediate-example? i would have expected the retained-example to be much faster.

thanks

martin

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andres

Re: opengl example "dynamicParticlesRetained" not better than immediate version

16 days ago

the performance is similar because the positions of the vertices are modified in each frame.

Re: opengl example "dynamicParticlesRetained" not better than immediate version

16 days ago

ok. so i guess this means that retained mode does not offer advantages in animations like particle systems, flocking, ... damn. or do you see any way how these animations can be improved with retain mode?

Re: opengl example "dynamicParticlesRetained" not better than immediate version

15 days ago

I cannot think of an easy answer. Performance optimizations really depend on the specifics of your system and how it is implemented.

A couple of general ideas:

*if the particle system is very large and never visible in its entirely, you could consider adding some culling to avoid updating invisible particles.

* if the particles' movement is dependent on a parameter such as time, then you could calculate the displacements directly in the vertex shader, while leaving the geometry completely static in Processing.

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opengl example "dynamicParticlesRetained" not better than immediate version

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Re: opengl example "dynamicParticlesRetained" not better than immediate version

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