Revision: 172
http://hgengine.svn.sourceforge.net/hgengine/?rev=172&view=rev
Author: axlecrusher
Date: 2009-03-03 21:36:47 +0000 (Tue, 03 Mar 2009)
Log Message:
-----------
fix point behind plane test
Modified Paths:
--------------
Mercury2/src/MercuryPlane.cpp
Modified: Mercury2/src/MercuryPlane.cpp
===================================================================
--- Mercury2/src/MercuryPlane.cpp 2009-03-03 13:37:30 UTC (rev 171)
+++ Mercury2/src/MercuryPlane.cpp 2009-03-03 21:36:47 UTC (rev 172)
@@ -4,7 +4,8 @@
bool MercuryPlane::IsBehindPlane(const MercuryVertex& point) const
{
- return m_normal.DotProduct( point ) < 0;
+ // origional algorithim was -dotproduct < 0
+ return m_normal.DotProduct( point+m_center ) >= 0;
}
bool MercuryPlane::IsBehindPlane(const BoundingBox& bb) const
@@ -12,15 +13,8 @@
const MercuryVertex& center = bb.GetCenter();
const MercuryVertex& extends = bb.GetExtend();
- MercuryVertex A1, A2, A3, tmp;
-
- tmp = center+MercuryVertex( extends.GetX(), 0, 0 );
- A1 = (center-tmp).Normalize();
- tmp = center+MercuryVertex( 0, extends.GetY(), 0 );
- A2 = (center-tmp).Normalize();
- tmp = center+MercuryVertex( 0, 0, extends.GetZ() );
- A3 = (center-tmp).Normalize();
-
+ const MercuryVertex &A1(bb.Normal(0)), &A2(bb.Normal(1)), &A3(bb.Normal(2));
+
float x = ABS( extends.GetX() * m_normal.DotProduct( A1 ) );
x += ABS( extends.GetY() * m_normal.DotProduct( A2 ) );
x += ABS( extends.GetZ() * m_normal.DotProduct( A3 ) );
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