#version 120 uniform float inInit = 13.0; // accept uniform initializers uniform mat4x3 nonSqMat; // non square matrices void main() { const float cosPI = cos(3.1415); // built-in calls in constant initializers vec4 v; v.x = 1.2f; // accepts 'f' suffix v.y = 5; // automatic int-to-float v.z = inInit; v.w = cosPI; v.x += nonSqMat[0][0]; float arr[4] = float[](1,2,3,4); // array initializer v.y += arr[0]; v.z += arr.length(); // array length gl_FragColor = v; }