OpenGL ES 3.0. I am currently close to exceeding the guaranteed number of uniforms (AFAIK the spec guarantees 1024) in my vertex shader. So far I’ve been sending individual uniforms and uniform arrays. Now, in an effort to fix all the problems with ‘max number of uniforms exceeded’ once and for all…

[image] Utumno: The basic types of the uniforms which will become parts of the UBO are arrays of ints and arrays of vec4s. You can always emulate an array of integers with an array of uvec4s. You simply have to transform the index into two indices: one for the uvec4 array, and one for the com…

Uh, so the following layout (shared) uniform vec4Uniforms { vec4 vEffectUni[MAX_NUM_EFFECT]; } ( or ‘uvec4’ ) is guaranteed to be tighly packed, i.e. without any gaps? That would solve all the problems. EDIT: Indeed, now I actually read section 7.6.2.2 ’ Standard Uniform Block Layout’ of the…

[image] Utumno: is guaranteed to be tighly packed No, nothing is guaranteed because you used shared. Only std140 has explicit layout guarantees. Basically, you should pretend that shared and packed don’t exist.

Layout in Uniform Buffer Object

OpenGL OpenGL: Basic Coding

Dark_Photon August 23, 2020, 3:02pm 5

Related: It sure would be useful if we had a GL extension to add std430 packing for UBOs in GLSL (GL or GL-ES).

This already exists in GLSL (Vulkan) in Vulkan 1.2 or with this extension:

VK_KHR_uniform_buffer_standard_layout