addressers.c++

#pragma once

#include <Furrovine++/Mathema.h>

namespace Furrovine {

	struct wrap_addresser {
		template <typename Ta, typename Tu>
		auto operator()( Ta&& a, Tu&& upper ) {
			return modulus( std::forward<Ta>( a ), std::forward<Tu>( upper ) );
		}
	};

	struct clamp_addresser {
		template <typename Ta, typename Tu>
		auto operator()( Ta&& a, Tu&& upper ) {
			typedef typename std::decay<Ta>::type Tad;
			return std::min( std::max( static_cast<Tad>( 0 ), std::forward<Ta>( a ) ), std::forward<Tu>( upper ) );
		}
	};

	struct mirror_addresser {
		template <typename Ta, typename Tu>
		auto operator()( Ta&& a, Tu&& upper ) {
			auto mult = ( a / upper );
			typedef decltype( mult ) mult_t;
			auto x = static_cast<mult_t>( modulus( mult, static_cast<mult_t>( 2 ) ) < 1 );
			x = ( 2 * x ) - 1;
			return ( a - ( upper * mult ) ) * x;
		}
	};

}