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[sprout.darkroom] implemented refraction

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This commit is contained in:
bolero-MURAKAMI 2013-12-06 01:57:31 +09:00
parent 8e3c426684
commit 8e306168da
8 changed files with 197 additions and 37 deletions
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106
sprout/darkroom/renderers/whitted_style.hpp
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@ -43,7 +43,7 @@ namespace sprout {
Camera const& camera, Objects const& objs, Lights const& lights,
Ray const& ray, Intersection const& inter, Renderer const& renderer,
std::size_t depth_max,
Direction const& reflect_dir
Direction const& new_dir
) const
{
return sprout::darkroom::renderers::calculate<Color>(
@ -51,19 +51,8 @@ namespace sprout {
camera, objs, lights,
sprout::tuples::remake<Ray>(
ray,
sprout::darkroom::coords::add(
sprout::darkroom::intersects::point_of_intersection(inter),
sprout::darkroom::coords::scale(
reflect_dir,
sprout::numeric_limits<typename sprout::darkroom::access::unit<Direction>::type>::epsilon() * 256
)
// ???
// sprout::darkroom::coords::scale(
// sprout::darkroom::intersects::normal(inter),
// sprout::numeric_limits<typename sprout::darkroom::access::unit<Direction>::type>::epsilon() * 256
// )
),
reflect_dir
sprout::darkroom::rays::detach_position(sprout::darkroom::intersects::point_of_intersection(inter), new_dir),
new_dir
),
depth_max - 1
);
@ -102,6 +91,80 @@ namespace sprout {
}
};
//
// whitted_transparent
//
class whitted_transparent {
private:
template<
typename Color,
typename Camera, typename Objects, typename Lights,
typename Ray, typename Intersection, typename Renderer,
typename Direction
>
SPROUT_CONSTEXPR Color
color_1(
Camera const& camera, Objects const& objs, Lights const& lights,
Ray const& ray, Intersection const& inter, Renderer const& renderer,
std::size_t depth_max,
Direction const& new_dir
) const
{
return !sprout::darkroom::coords::is_zero(new_dir)
? sprout::darkroom::renderers::calculate<Color>(
renderer,
camera, objs, lights,
sprout::tuples::remake<Ray>(
ray,
sprout::darkroom::rays::detach_position(sprout::darkroom::intersects::point_of_intersection(inter), new_dir),
new_dir
),
depth_max - 1
)
: sprout::tuples::make<Color>(0, 0, 0)
;
}
public:
template<
typename Color,
typename Camera, typename Objects, typename Lights,
typename Ray, typename Intersection, typename Renderer
>
SPROUT_CONSTEXPR Color
operator()(
Camera const& camera, Objects const& objs, Lights const& lights,
Ray const& ray, Intersection const& inter, Renderer const& renderer,
std::size_t depth_max
) const
{
typedef typename std::decay<
decltype(sprout::darkroom::materials::alpha(sprout::darkroom::intersects::material(inter)))
>::type alpha_type;
typedef typename std::decay<
decltype(sprout::darkroom::materials::refraction(sprout::darkroom::intersects::material(inter)))
>::type refraction_type;
return depth_max > 0
&& sprout::darkroom::intersects::does_intersect(inter)
&& sprout::darkroom::materials::alpha(sprout::darkroom::intersects::material(inter))
> sprout::numeric_limits<alpha_type>::epsilon()
&& sprout::darkroom::materials::refraction(sprout::darkroom::intersects::material(inter))
> sprout::numeric_limits<refraction_type>::epsilon()
? color_1<Color>(
camera, objs, lights,
ray, inter, renderer,
depth_max,
sprout::darkroom::coords::refract(
sprout::darkroom::rays::direction(ray),
sprout::darkroom::intersects::normal(inter),
sprout::darkroom::intersects::is_from_inside(inter)
? 1 / sprout::darkroom::materials::refraction(sprout::darkroom::intersects::material(inter))
: sprout::darkroom::materials::refraction(sprout::darkroom::intersects::material(inter))
)
)
: sprout::tuples::make<Color>(0, 0, 0)
;
}
};
//
// whitted_style
//
template<typename InfinityColor = sprout::darkroom::renderers::direction_gradation>
@ -115,18 +178,24 @@ namespace sprout {
SPROUT_CONSTEXPR Color
color_3(
Ray const& ray, Intersection const& inter,
Color const& diffuse_color, Color const& mirror_color
Color const& diffuse_color, Color const& mirror_color, Color const& transparent_color
) const
{
return sprout::darkroom::intersects::does_intersect(inter)
? sprout::darkroom::colors::add(
sprout::darkroom::colors::mul(
diffuse_color,
1 - sprout::darkroom::materials::reflection(sprout::darkroom::intersects::material(inter))
1
- sprout::darkroom::materials::reflection(sprout::darkroom::intersects::material(inter))
- sprout::darkroom::materials::alpha(sprout::darkroom::intersects::material(inter))
),
sprout::darkroom::colors::mul(
mirror_color,
sprout::darkroom::materials::reflection(sprout::darkroom::intersects::material(inter))
),
sprout::darkroom::colors::mul(
transparent_color,
sprout::darkroom::materials::alpha(sprout::darkroom::intersects::material(inter))
)
)
: sprout::darkroom::renderers::calculate_infinity<Color>(infinity_color_, sprout::darkroom::rays::direction(ray))
@ -148,6 +217,11 @@ namespace sprout {
ray, inter,
diffuse_color,
sprout::darkroom::renderers::whitted_mirror().template operator()<Color>(
camera, objs, lights,
ray, inter, *this,
depth_max
),
sprout::darkroom::renderers::whitted_transparent().template operator()<Color>(
camera, objs, lights,
ray, inter, *this,
depth_max