WARN: Variable cannot be bound (it either doesn't exist or has been optimized away)

Question

I am trying to pass a variable timeVar (a float initially set to 0.0) that changes in my display() method with the line

timeVar = time(0);

to my fragment shader. Then I do this

safe_glUniform1f(h_uTime, timeVar);

and pass it to my shader program like so

h_uTime = safe_glGetAttribLocation(h_program, "uTime");

But I keep getting this error. Please help!

WARN: uTime cannot be bound (it either doesn't exist or has been optimized 
away). safe_glAttrib calls will silently ignore it.

`uTime` seems to be a uniform but you query an attribute location. Try using `glGetUniformLocation` instead. — BDL, Sep 23 '15 at 22:09

score 2 · Accepted Answer · answered Sep 23 '15 at 22:23

2

Since uTime is a uniform and not an attribute, using glGetAttribLocation will always result in an error. One has to use glGetUniformLocation instead.

answered Sep 23 '15 at 22:23

BDL

21,052
22
49
55

WARN: Variable cannot be bound (it either doesn't exist or has been optimized away)

1 Answers1