Hi, I have no knowlegde of opengl, but I need to use it because the way P3D renders the texture using beginshape doesnt look good.


So my sketch is running fine at 60fps using OPENGL, but when I add some loadPixel funcitons it drops sharply to 9fps, I read on a post that using get, loadpixels and those methods alike with opengl makes the sketch runs very slowly but it doesnt get into details as why.

So if that is the case what can I do?, is there any other way to workaround this?

Any help will be much appreciated!

Cheers
rS

loadPixels() is slow because it causes pixels from either the OpenGL framebuffer or texture memory (depending on where you are calling it) to be copied from the graphics card to the CPU. Those pixels then need to be put back after you're done modifying them. Graphics card are not particularly good at doing that sort of transfers. This is a slow operation that is proportional to the number of pixels that need to be moved: the higher the resolution you are working with, the slower it will be.

As for workarounds, that really depends on what you're trying to do exactly.

d.