gl_DrawID Not Available Even With GL_ARB_shader_draw_parameters

[Dark_Photon]

The below post from last year might give you some ideas.

Also, you might verify that you’re populating and binding the GL_DRAW_INDIRECT_BUFFER properly, providing the correct drawCount to the draw call, and of course checking for GL errors.

Failing that, consider rolling your own gl_DrawID. For suggestions, see:

• Approaching zero driver overhead - 3/2014, Slides 31-33. They suggest a few gl_DrawID alternatives.
• 17/11/2012 - Surviving without gl_DrawID

gl_DrawID is always 0 (glMultiDrawElementsIndirect)

I use glMultiDrawElementsIndirect to draw multiple meshs. The meshs are drawn correctly just not at the correct position. The position is selected from an array using gl_DrawID as index. Further tests have shown that gl_DrawID always remains 0. Also gl_baseInstance is always the value from the first DrawElementsIndirectCommand. The strangest thing is that when I use RenderDoc it all works as expected. Could this be a driver issue? Or something extremely esoteric I’m not aware of? I have used…