Accessing processing 3+ draw function implementation

mattww

Hello

I just started to learn processing and would like to learn more about how the draw calls are implemented. For example i would like to see rect() implementation and its relevant OpenGL calls. Problem is i can not locate the files of the code. Can anyone point me in the right direction and name the location of code files.

Thank you

kfrajer

This will be a good start:

https://github.com/processing/processing/blob/master/core/src/processing/core/PGraphics.java#L2582

https://github.com/processing/processing/blob/master/core/src/processing/opengl/PGraphicsOpenGL.java#L3109

https://github.com/processing/processing/blob/master/core/src/processing/awt/PGraphicsJava2D.java#L1234

Kf

koogs

the opengl stuff quickly disappears into the InGeometry class:

https://github.com/processing/processing/blob/master/core/src/processing/opengl/PGraphicsOpenGL.java#L7594

mattww

i could not actually find any OpenGl commands from these files. For example glDrawArrays,, , glGenBuffers, glBindBuffers or glBufferdata.

What i am interested in is that when i call rect() in a loop, does Processing first generate new buffer for each rectangle fill vertex and color data arrays and copy those into array buffer and then call draw for each rectangle. i can not get hold on how this is done in processing.