#version 330 in vec4 inVar; out vec4 outVar; const int constInt = 3; uniform int uniformInt; void main() { const int a1 = 2; // okay const int a2 = constInt; // okay const int a3 = uniformInt; // error vec4 c[constInt]; // okay vec4 d[uniformInt]; // error vec4 e[constInt + uniformInt]; // error vec4 f[uniformInt + constInt]; // error vec4 g[int(sin(0.3)) + 1]; // okay } const struct S { vec3 v3; ivec2 iv2; } s = S(vec3(3.0), ivec2(3, constInt + uniformInt)); // ERROR, non-const y componenent const struct S2 { vec3 v3; ivec2 iv2; mat2x4 m; } s2 = S2(vec3(3.0), ivec2(3, constInt), mat2x4(1.0, 2.0, 3.0, inVar.x, 5.0, 6.0, 7.0, 8.0)); // ERROR, non-constant matrix