darts/sampling.h file

Functions

auto randf() -> float

Global random number generator that produces floats between [0,1)

auto random_in_unit_sphere() -> Vec3f

Sample a random point uniformly within a unit sphere (uses the global randf() RNG and rejection sampling)

auto random_in_unit_disk() -> Vec2f

Sample a random point uniformly within a unit disk (uses the global randf() RNG and rejection sampling)

auto sample_disk(const Vec2f& rv) -> Vec2f

Uniformly sample a vector on a 2D disk with radius 1, centered around the origin.

auto sample_disk_pdf(const Vec2f& p) -> float

Probability density of sample_disk()

auto sample_sphere(const Vec2f& rv) -> Vec3f

Uniformly sample a vector on the unit sphere with respect to solid angles.

auto sample_sphere_pdf() -> float

Probability density of sample_sphere()

auto sample_hemisphere(const Vec2f& rv) -> Vec3f

Uniformly sample a vector on the unit hemisphere around the pole (0,0,1) with respect to solid angles.

auto sample_hemisphere_pdf(const Vec3f& v) -> float

Probability density of sample_hemisphere()

auto sample_hemisphere_cosine(const Vec2f& rv) -> Vec3f

Uniformly sample a vector on the unit hemisphere around the pole (0,0,1) with respect to projected solid angles.

auto sample_hemisphere_cosine_pdf(const Vec3f& v) -> float

Probability density of sample_hemisphere_cosine()

auto sample_hemisphere_cosine_power(float exponent, const Vec2f& rv) -> Vec3f

Sample a vector on the unit hemisphere with a cosine-power density about the pole (0,0,1)

auto sample_hemisphere_cosine_power_pdf(float exponent, float cosine) -> float

Probability density of sample_hemisphere_cosine_power()

auto sample_sphere_cap(const Vec2f& rv, float cos_theta_max) -> Vec3f

Uniformly sample a vector on a spherical cap around (0, 0, 1)

auto sample_sphere_cap_pdf(float cos_theta, float cos_theta_max) -> float

Probability density of sample_sphere_cap()

auto sample_triangle(const Vec3f& v0, const Vec3f& v1, const Vec3f& v2, const Vec2f& rv) -> Vec3f

Sample a point uniformly on a triangle with vertices v0, v1, v2.

auto sample_triangle_pdf(const Vec3f& v0, const Vec3f& v1, const Vec3f& v2) -> float

Sampling density of sample_triangle()