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package main
type Material interface {
Scatter(ray Ray, hit HitRecord) (Ray, Color)
}
type Lambertian struct {
albedo Color
}
func (lambertian Lambertian) Scatter(ray Ray, hit HitRecord) (Ray, Color) {
// TODO: Use the correct distribution
direction := AddVec3D(hit.normal, RandomInUnitSphere())
scattered := Ray{hit.point, direction}
return scattered, lambertian.albedo
}
type Metal struct {
albedo Color
fuzz float64
}
func (metal Metal) Scatter(ray Ray, hit HitRecord) (Ray, Color) {
reflected := AddVec3D(ray.direction.Unit().Reflect(hit.normal), ScalarProduct(metal.fuzz, RandomInUnitSphere()))
scattered := Ray{hit.point, reflected}
return scattered, metal.albedo
}
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