mesa/progs/glsl/brick.shtest

vs CH06-brick.vert
fs CH06-brick.frag
uniform LightPosition GL_FLOAT_VEC3 0.1 0.1 9.0
uniform BrickColor GL_FLOAT_VEC3 0.8 0.2 0.2
uniform MortarColor GL_FLOAT_VEC3 0.6 0.6 0.6
uniform BrickSize  GL_FLOAT_VEC2 1.0 0.3
uniform BrickPct GL_FLOAT_VEC2 0.9 0.8