Module tray_rust::mc

Defines various Monte Carlo sampling functions for sampling points/directions on objects and computing the corresponding pdfs

Functions

concentric_sample_disk	Compute concentric sample positions on a unit disk mapping input from range [0, 1) to sample positions on a disk samples should be two random samples in range [0, 1) See: Shirley and Chiu, A Low Distortion Map Between Disk and Square
cos_hemisphere_pdf	Compute the PDF of the cosine weighted hemisphere sampling
cos_sample_hemisphere	Sample a hemisphere using a cosine distribution to produce cosine weighted samples samples should be two random samples in range [0, 1) directions returned will be in the hemisphere around (0, 0, 1)
power_heuristic	Power heuristic for multiple importance sampling for two functions being sampled, f & g where beta is hard-coded to be two following PBR & Veach
uniform_cone_pdf	Return the PDF for uniformly sampling a cone with some max solid angle
uniform_sample_cone	Uniformly sample a direction in a cone with max angle cos_theta_max where the cone lies along the z-axis
uniform_sample_cone_frame	Uniformly sample a direction in a cone with max angle cos_theta_max where the cone looks down the w_z vector provided, with w_x, w_y forming the rest of the coordinate frame for the cone
uniform_sample_sphere	Uniformly sample a direction on the unit sphere about the origin