1 files changed, 43 insertions, 0 deletions
diff --git a/src/model/face.cc b/src/model/face.cc
new file mode 100644
index 0000000..c6c3269
--- /dev/null
+++ b/src/model/face.cc
@@ -0,0 +1,43 @@
+/*
+   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);
+}
+
+}