Read .map patch definitions into model quads (without triangulation)

1 files changed, 7 insertions, 0 deletions

diff --git a/src/math/vector3f.h b/src/math/vector3f.h
index a7437aa..7cd533d 100644
--- a/src/math/vector3f.h
+++ b/src/math/vector3f.h
@@ -225,6 +225,13 @@ inline btVector3 to_btVector3(const math::Vector3f & v)
 	return btVector3(v[0], v[1], v[2]);
 }
 
+/// calculate the normal of a plane defined by three vertices 
+inline const Vector3f normal(const Vector3f & first, const Vector3f & second, const Vector3f & third) {
+	Vector3f r = crossproduct(second - first, third - first);
+	r.normalize();
+	return r;
+}
+
 } // namespace math
 
 #endif // __INCLUDED_MATH_VECTOR3F_H__