#ifndef TXS_BARETRI_GUARD
#define TXS_BARETRI_GUARD

#include "txs_globals.h"

namespace TXS
{
	class BareTri
	{
		public:

			Point a, b, c;
			Vector normal;
			list<Plane> edgePlanes;
			Plane facePlane;

			BareTri(const Point &a, const Point &b, const Point &c) :
				a(a), b(b), c(c)
			{
				Vector e1 = b - a;
				Vector e2 = c - b;
				normal = e1 * e2;
				BOOL normSuccess = this->normal.Normalize();
				if(!normSuccess) __ERROR__("BT.h 23");

				facePlane.Set(normal, a);

				Plane ep;

				e1 = b - a;
				ep.Set(normal * e1, a);
				edgePlanes.push_back(ep);

				e1 = c - b;
				ep.Set(normal * e1, b);
				edgePlanes.push_back(ep);

				e1 = a - c;
				ep.Set(normal * e1, c);
				edgePlanes.push_back(ep);
			}

			bool pointInExtrudedInterior(const Point &p)
			{
				list<Plane>::iterator p_iter;
				for(p_iter = edgePlanes.begin(); p_iter != edgePlanes.end(); ++p_iter) {
					Plane ep = *p_iter;
					TXS_REAL dist = (TXS_REAL)Distance(ep, p);
					if(dist < 0.0) {
						return false;
					}
				}

				return true;
			}

			bool intersectRay(const Point &s, const Vector &d, Point &intxOut)
			{
				if(Intersect(facePlane, s, d, intxOut)) {
					if(pointInExtrudedInterior(intxOut)) {
						return true;
					}
				}
				return false;
			}
	};
}

#endif /* TXS_BARETRI_GUARD */