Hello everyone. I've run into a problem where the linking of my fragment shader is failing due to GL_MAX_FRAGMENT_UNIFORM_COMPONENTS being exceeded - yet based on that value and the uniforms that are in my shader, I do not see how that's possible.
In my test the uniform declaration part of my generated fragment shader source is:
uniform sampler2D tex;
uniform float ambientEnabled;
uniform vec3 eyeVector;
uniform float lightTypeList0[156];
uniform vec3 lightDirectionList0[156];
uniform vec3 lightLocationList0[156];
uniform vec3 lightColorList0[156];
uniform float lightDistanceRateList0[156];
uniform float lightAreaLimitList0[156];
uniform float lightShineList0[156];
By my calculations that comes to a total of 2026, but the value I'm getting back from:
System.out.println("Max Fragment Uniform Components: "+GL11.glGetInteger(GL20.GL_MAX_FRAGMENT_UNIFORM_COMPONENTS));
is:
Max Fragment Uniform Components: 2048
Can anyone please advise as to how I'm exceeding 2048 floats? Does the sampler2D count towards the limit? If so, by how much?
The vec3s probably count as vec4s, that's why you go over the limit.
Thankyou! That was the problem - each of the uniforms was being considered a vec4 in terms of the component count. Now I've packed them together into vec4s and its working great.
Thanks again.