CODEWITHSUNDEEP
glsluniform
ranzy
ranzy

Reputation: 179

uniform variables same in opengl

I have two variables that I'm getting from shader in opengl. I do something like this.

    vLoc = glGetAttribLocation(progId,"vPosition");
    nLoc = glGetAttribLocation(progId,"vNormal");

matViewLoc = glGetUniformLocation(progId,"matView");
matProjLoc = glGetUniformLocation(progId,"matProj");
matTranslateLoc = glGetUniformLocation(progId,"matTranslate");

vLoc and projLoc return the same location. Would anybody know why? Thanks!

Upvotes: 1

Views: 293

Answers (2)

Dr. Snoopy
Dr. Snoopy

Reputation: 56407

The space for uniform locations and attribute locations is different, so you can have same IDs, but they refer to different objects.

You can't pass a attribute location to a glUniform function or a uniform location to a attrib function.

Upvotes: 4

cuatro
cuatro

Reputation: 103

did you bind the attrib location when you created the shader program using glBindAttribLocation?

You need something like this:

glBindAttribLocation(progId, 0, "vPosition");
glBindAttribLocation(progId, 1, "vNormal");

Upvotes: 0

Related Questions