Searched refs:M_4PI_F (Results 1 – 2 of 2) sorted by relevance
321 *pdf = 1.0f / M_4PI_F; in background_light_sample()427 return kernel_data.integrator.pdf_lights / M_4PI_F; in background_light_pdf()
71 #ifndef M_4PI_F72 # define M_4PI_F (12.566370614359172f) /* 4*pi */ macro