/*
**  ClanLib SDK
**  Copyright (c) 1997-2020 The ClanLib Team
**
**  This software is provided 'as-is', without any express or implied
**  warranty.  In no event will the authors be held liable for any damages
**  arising from the use of this software.
**
**  Permission is granted to anyone to use this software for any purpose,
**  including commercial applications, and to alter it and redistribute it
**  freely, subject to the following restrictions:
**
**  1. The origin of this software must not be misrepresented; you must not
**     claim that you wrote the original software. If you use this software
**     in a product, an acknowledgment in the product documentation would be
**     appreciated but is not required.
**  2. Altered source versions must be plainly marked as such, and must not be
**     misrepresented as being the original software.
**  3. This notice may not be removed or altered from any source distribution.
**
**  Note: Some of the libraries ClanLib may link to may have additional
**  requirements or restrictions.
**
**  File Author(s):
**
**    Harry Storbacka
**    Mark Page
*/

#include "Core/precomp.h"
#include "API/Core/Math/triangle_math.h"

namespace clan
{
	template<typename Type>
	bool Trianglex<Type>::point_inside(const Vec2<Type> &point) const
	{
		Type b0 = (q.x - p.x) * (r.y - p.y) - (r.x - p.x) * (q.y - p.y);
		Type b1 = ((q.x - point.x)  * (r.y - point.y) - (r.x - point.x)  * (q.y - point.y)) / b0;
		Type b2 = ((r.x - point.x)  * (p.y - point.y) - (p.x - point.x)  * (r.y - point.y)) / b0;
		Type b3 = ((p.x - point.x)  * (q.y - point.y) - (q.x - point.x)  * (p.y - point.y)) / b0;

		Type zero = (Type)0;
		if ((b1 > zero && b2 > zero && b3 > zero) || ((b1 >= zero && b2 >= zero && b3 >= zero) && b1 + b2 + b3 > zero))
			return true;

		return false;
	}

	// Explicit instantiate the versions we use:
	template class Trianglex<int>;
	template class Trianglex<float>;
	template class Trianglex<double>;
}
