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/*
model/face.cc
This file is part of the Osirion project and is distributed under
the terms of the GNU General Public License version 2
*/
#include <string>
#include "model/face.h"
namespace model
{
using math::Vector3f;
/*
* all points p(x, y, z) on the plane satisfy the general equation
* x*a() + y*b() + z*c() + d() = 0
*/
Face::Face(Vector3f const & point0, Vector3f const &point1, Vector3f const &point2)
{
face_detail = false;
face_surface_flags = 0;
face_material = 0;
face_point[0] = point0;
face_point[1] = point1;
face_point[2] = point2;
face_normal = crossproduct((face_point[1] - face_point[0]) , (face_point[2] - face_point[0]));
pd = -1 * (face_normal.x * face_point[0].x + face_normal.y * face_point[0].y + face_normal.z * face_point[0].z);
}
Face::Face(Face const & other)
{
for (size_t i=0; i < 3; i++)
this->face_point[i] = other.face_point[i];
face_normal = crossproduct((face_point[1] - face_point[0]) , (face_point[2] - face_point[0]));
pd = -1 * (face_normal.x * face_point[0].x + face_normal.y * face_point[0].y + face_normal.z * face_point[0].z);
}
}
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