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105 lines
3.2 KiB
C++
105 lines
3.2 KiB
C++
#ifndef SPROUT_DARKROOM_MATERIALS_PLAID_HPP
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#define SPROUT_DARKROOM_MATERIALS_PLAID_HPP
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#include <cstdint>
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#include <sprout/config.hpp>
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#include <sprout/tuple/tuple.hpp>
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#include <sprout/math/fmod.hpp>
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namespace sprout {
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namespace darkroom {
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namespace materials {
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//
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// plaid_element
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//
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template<typename Element, typename Scale = double>
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class plaid_element {
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public:
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typedef Element result_type;
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typedef Scale unit_type;
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private:
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result_type elem1_;
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result_type elem2_;
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unit_type scale_;
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private:
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template<typename Unit>
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SPROUT_CONSTEXPR result_type
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calc_1(Unit const& u, Unit const& v) const {
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return (u >= 0 && v >= 0) || (u < 0 && v < 0) ? elem1_ : elem2_;
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}
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public:
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SPROUT_CONSTEXPR plaid_element(result_type const& elem1, result_type const& elem2, unit_type const& scale = 1)
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: elem1_(elem1)
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, elem2_(elem2)
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, scale_(scale)
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{}
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template<typename Unit>
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SPROUT_CONSTEXPR result_type
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operator()(Unit const& u, Unit const& v) const {
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return calc_1(
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(u < 0
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? scale_ + sprout::fmod(u, scale_)
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: sprout::fmod(u, scale_)
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)
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- scale_ / 2
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,
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(v < 0
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? scale_ + sprout::fmod(v, scale_)
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: sprout::fmod(v, scale_)
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)
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- scale_ / 2
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);
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}
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};
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//
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// make_plaid
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//
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template<typename Element>
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inline SPROUT_CONSTEXPR sprout::darkroom::materials::plaid_element<Element>
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make_plaid(Element const& elem1, Element const& elem2) {
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return sprout::darkroom::materials::plaid_element<Element>(elem1, elem2);
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}
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template<typename Element, typename Unit>
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inline SPROUT_CONSTEXPR sprout::darkroom::materials::plaid_element<Element>
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make_plaid(Element const& elem1, Element const& elem2, Unit const& scale) {
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return sprout::darkroom::materials::plaid_element<Element, Unit>(elem1, elem2, scale);
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}
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//
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// make_plaid_material_image
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//
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template<typename Color, typename Reflection>
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inline SPROUT_CONSTEXPR sprout::tuples::tuple<
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sprout::darkroom::materials::plaid_element<Color>,
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sprout::darkroom::materials::plaid_element<Reflection>
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>
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make_plaid_material_image(
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Color const& col1, Color const& col2,
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Reflection const& ref1, Reflection const& ref2
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)
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{
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return sprout::tuples::make_tuple(
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sprout::darkroom::materials::make_plaid(col1, col2),
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sprout::darkroom::materials::make_plaid(ref1, ref2)
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);
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}
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template<typename Color, typename Reflection, typename Unit>
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inline SPROUT_CONSTEXPR sprout::tuples::tuple<
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sprout::darkroom::materials::plaid_element<Color, Unit>,
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sprout::darkroom::materials::plaid_element<Reflection, Unit>
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>
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make_plaid_material_image(
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Color const& col1, Color const& col2,
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Reflection const& ref1, Reflection const& ref2,
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Unit const& scale
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)
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{
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return sprout::tuples::make_tuple(
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sprout::darkroom::materials::make_plaid(col1, col2, scale),
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sprout::darkroom::materials::make_plaid(ref1, ref2, scale)
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);
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}
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} // namespace materials
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} // namespace darkroom
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} // namespace sprout
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#endif // #ifndef SPROUT_DARKROOM_MATERIALS_PLAID_HPP
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