Material class
#include <darts/material.h>

A base class used to represent surface material properties.

Derived classes

class Dielectric: A smooth dielectric surface that reflects and refracts light according to the specified index of refraction ior.
class DiffuseLight: A material that emits light equally in all directions from the front side of a surface.
class Lambertian: A perfectly diffuse (Lambertian) material.
class Metal: A metallic material that reflects light into the (potentially rough) mirror reflection direction.

Material(const json& j = json::object()): Default constructor which accepts a json object of named parameters.
~Material() defaulted virtual: Free all memory.

auto scatter(const Ray3f& ray, const HitInfo& hit, Color3f& attenuation, Ray3f& scattered) const -> bool virtual: Compute the scattered direction scattered at a surface hitpoint.
auto emitted(const Ray3f& ray, const HitInfo& hit) const -> Color3f virtual: Compute the amount of emitted light at the surface hitpoint.
auto is_emissive() const -> bool virtual: Return whether or not this Material is emissive.

Compute the scattered direction scattered at a surface hitpoint.

Parameters
ray	incoming ray
hit	the ray's intersection with the surface
attenuation	how much the light should be attenuated
scattered	the direction light should be scattered
Returns	bool True if the surface scatters light

The base Material does not scatter any light, so it simply returns false.

Compute the amount of emitted light at the surface hitpoint.

Parameters
ray	the incoming ray
hit	the ray's intersection with the surface
Returns	the emitted color

The base Material class does not emit light, so it simply returns black.

Return whether or not this Material is emissive.

This is primarily used to create a global list of emitters for sampling.