private void resetUniformsNotSetByCurrent(Shader shader) {
ListMap<String, Uniform> uniforms = shader.getUniformMap();
int size = uniforms.size();
for (int i = 0; i < size; i++) {
Uniform u = uniforms.getValue(i);
if (!u.isSetByCurrentMaterial()) {
u.clearValue();
}
}
}
