#6557. Fixed incorrect implementation of idBox::PlaneDistance and PlaneSide.

They used to ignore coordinate system / matrix of the oriented box.
Now it is used to transform the plane normal.


git-svn-id: http://svn.thedarkmod.com/svn/darkmod_src/trunk@10826 49c82d7f-2e2a-0410-a16f-ae8f201b507f

Author: stgatilov

idlib/bv/Box.cpp

@@ -324,12 +324,14 @@ idBox::PlaneDistance
 ================
 */
 float idBox::PlaneDistance( const idPlane &plane ) const {
-	float d1, d2;
+	idVec3 localNormal( plane.Normal() * axis[0], plane.Normal() * axis[1], plane.Normal() * axis[2] );
 
-	d1 = plane.Distance( center );
-	d2 = idMath::Fabs( extents[0] * plane.Normal()[0] ) +
-			idMath::Fabs( extents[1] * plane.Normal()[1] ) +
-				idMath::Fabs( extents[2] * plane.Normal()[2] );
+	float d1 = plane.Distance( center );
+	float d2 = (
+		idMath::Fabs( extents.x * localNormal.x ) +
+		idMath::Fabs( extents.y * localNormal.y ) +
+		idMath::Fabs( extents.z * localNormal.z )
+	);
 
 	if ( d1 - d2 > 0.0f ) {
 		return d1 - d2;
@@ -346,12 +348,14 @@ idBox::PlaneSide
 ================
 */
 int idBox::PlaneSide( const idPlane &plane, const float epsilon ) const {
-	float d1, d2;
-
-	d1 = plane.Distance( center );
-	d2 = idMath::Fabs( extents[0] * plane.Normal()[0] ) +
-			idMath::Fabs( extents[1] * plane.Normal()[1] ) +
-				idMath::Fabs( extents[2] * plane.Normal()[2] );
+	idVec3 localNormal( plane.Normal() * axis[0], plane.Normal() * axis[1], plane.Normal() * axis[2] );
+
+	float d1 = plane.Distance( center );
+	float d2 = (
+		idMath::Fabs( extents.x * localNormal.x ) +
+		idMath::Fabs( extents.y * localNormal.y ) +
+		idMath::Fabs( extents.z * localNormal.z )
+	);
 
 	if ( d1 - d2 > epsilon ) {
 		return PLANESIDE_FRONT;