void VignetteEffect::set_gl_state(GLuint glsl_program_num, const std::string &prefix, unsigned *sampler_num)
{
Effect::set_gl_state(glsl_program_num, prefix, sampler_num);
set_uniform_float(glsl_program_num, prefix, "pihalf_div_radius", 0.5 * M_PI / radius);
void VignetteEffect::set_gl_state(GLuint glsl_program_num, const std::string &prefix, unsigned *sampler_num)
{
Effect::set_gl_state(glsl_program_num, prefix, sampler_num);
set_uniform_float(glsl_program_num, prefix, "pihalf_div_radius", 0.5 * M_PI / radius);