[Hgengine-cvs] SF.net SVN: hgengine:[693] Mercury2/src/DataTypes

[<axl...@us...>]

Revision: 693
          http://hgengine.svn.sourceforge.net/hgengine/?rev=693&view=rev
Author:   axlecrusher
Date:     2010-04-22 00:01:37 +0000 (Thu, 22 Apr 2010)

Log Message:
-----------
construct can construct bounding boxes around triangles
can be used for terrain collision

Modified Paths:
--------------
    Mercury2/src/DataTypes/MTriangle.cpp
    Mercury2/src/DataTypes/MTriangle.h

Modified: Mercury2/src/DataTypes/MTriangle.cpp
===================================================================
--- Mercury2/src/DataTypes/MTriangle.cpp	2010-04-20 15:47:42 UTC (rev 692)
+++ Mercury2/src/DataTypes/MTriangle.cpp	2010-04-22 00:01:37 UTC (rev 693)
@@ -14,7 +14,6 @@
 	m_verts[0] = t.m_verts[0];
 	m_verts[1] = t.m_verts[1];
 	m_verts[2] = t.m_verts[2];
-	
 }
 
 MTriangle::MTriangle(const MercuryVertex& a, const MercuryVertex& b, const MercuryVertex& c)
@@ -89,6 +88,32 @@
 	return true;
 }
 
+BoundingBox MTriangle::MakeBoundingBox()
+{
+	float minX, minY, minZ;
+	float maxX, maxY, maxZ;
+	minX=minY=minZ = 9999999999999;
+	maxX=maxY=maxZ = -9999999999999;
+	
+	for (uint8_t i = 0; i<3; ++i)
+	{
+		minX = MIN<float>(minX,m_verts[i].GetX());
+		minY = MIN<float>(minY,m_verts[i].GetY());
+		minZ = MIN<float>(minZ,m_verts[i].GetZ());
+		maxX = MAX<float>(maxX,m_verts[i].GetX());
+		maxY = MAX<float>(maxY,m_verts[i].GetY());
+		maxZ = MAX<float>(maxZ,m_verts[i].GetZ());
+	}
+	
+	//compute center
+	MercuryVertex center( (maxX+minX)/2.0f, (maxY+minY)/2.0f, (maxZ+minZ)/2.0f );
+
+	//extends
+	MercuryVertex extend( (maxX-minX)/2.0, (maxY-minY)/2.0, (maxZ-minZ)/2.0 );
+
+	return BoundingBox(center, extend);
+}
+
 /****************************************************************************
  *   Copyright (C) 2009 by Joshua Allen                                     *
  *                                                                          *

Modified: Mercury2/src/DataTypes/MTriangle.h
===================================================================
--- Mercury2/src/DataTypes/MTriangle.h	2010-04-20 15:47:42 UTC (rev 692)
+++ Mercury2/src/DataTypes/MTriangle.h	2010-04-22 00:01:37 UTC (rev 693)
@@ -2,6 +2,7 @@
 #define MTRIANGLE_H
 
 #include <MercuryVertex.h>
+#include <BoundingBox.h>
 
 class MTriangle
 {
@@ -17,6 +18,8 @@
 		MercuryVertex InterpolatePosition(const MercuryVertex& barycentric);
 				
 		bool operator == (const MTriangle& rhs) const;
+		
+		BoundingBox MakeBoundingBox();
 //	private:
 		
 		MercuryVertex m_verts[3];


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