Add new triangle3d method, suggested by rogerborg. Fix comment. Fix type in multiplication.

git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@2859 dfc29bdd-3216-0410-991c-e03cc46cb475

include/ITriangleSelector.h

@@ -60,8 +60,8 @@ public:
 	an IMetaTriangleSelector) this this function may be called multiple
 	times to retrieve all triangles.
 
-	Please note that unoptimized triangle selectors also may return
-	triangles which are not in the specified box at all.
+	This method will return at least the triangles that intersect the box,
+	but may return other triangles as well.
 	\param triangles: Array where the resulting triangles will be written
 	to.
 	\param arraySize: Size of the target array.

include/triangle3d.h

@@ -48,6 +48,20 @@ namespace core
 				box.isPointInside(pointC));
 		}
 
+		//! Determines if the triangle is totally outside a bounding box.
+		/** \param box Box to check.
+		\return True if triangle is outside the box, otherwise false. */
+		bool isTotalOutsideBox(const aabbox3d<T>& box) const
+		{
+			return ((pointA.X > box.MaxEdge.X && pointB.X > box.MaxEdge.X && pointC.X > box.MaxEdge.X) ||
+
+				(pointA.Y > box.MaxEdge.Y && pointB.Y > box.MaxEdge.Y && pointC.Y > box.MaxEdge.Y) ||
+				(pointA.Z > box.MaxEdge.Z && pointB.Z > box.MaxEdge.Z && pointC.Z > box.MaxEdge.Z) ||
+				(pointA.X < box.MinEdge.X && pointB.X < box.MinEdge.X && pointC.X < box.MinEdge.X) ||
+				(pointA.Y < box.MinEdge.Y && pointB.Y < box.MinEdge.Y && pointC.Y < box.MinEdge.Y) ||
+				(pointA.Z < box.MinEdge.Z && pointB.Z < box.MinEdge.Z && pointC.Z < box.MinEdge.Z));
+		}
+
 		//! Get the closest point on a triangle to a point on the same plane.
 		/** \param p Point which must be on the same plane as the triangle.
 		\return The closest point of the triangle */

include/vector3d.h

@@ -161,9 +161,9 @@ namespace core
 		//! Inverts the vector.
 		vector3d<T>& invert()
 		{
-			X *= -1.0f;
-			Y *= -1.0f;
-			Z *= -1.0f;
+			X *= -1;
+			Y *= -1;
+			Z *= -1;
 			return *this;
 		}