SF.net SVN: quesa:[3325] trunk/quesa/SDK/Extras/Utility Sources/ Mutating Algorithms/TransformGeometry.cpp

[<jww...@us...>]

Revision: 3325
          http://sourceforge.net/p/quesa/code/3325
Author:   jwwalker
Date:     2014-05-22 18:39:56 +0000 (Thu, 22 May 2014)
Log Message:
-----------
Utility sources:  When transforming a TriMesh, re-normalize the normals.

Modified Paths:
--------------
    trunk/quesa/SDK/Extras/Utility Sources/Mutating Algorithms/TransformGeometry.cpp

Modified: trunk/quesa/SDK/Extras/Utility Sources/Mutating Algorithms/TransformGeometry.cpp
===================================================================
--- trunk/quesa/SDK/Extras/Utility Sources/Mutating Algorithms/TransformGeometry.cpp	2014-05-22 18:33:56 UTC (rev 3324)
+++ trunk/quesa/SDK/Extras/Utility Sources/Mutating Algorithms/TransformGeometry.cpp	2014-05-22 18:39:56 UTC (rev 3325)
@@ -8,7 +8,7 @@
 		Initial version written by James W. Walker.
 
     COPYRIGHT:
-        Copyright (c) 2008, Quesa Developers. All rights reserved.
+        Copyright (c) 2008-2014, Quesa Developers. All rights reserved.
 
         For the current release of Quesa, please see:
 
@@ -182,6 +182,7 @@
 			&theNormal ))
 		{
 			Q3Vector3D_Transform( &theNormal, &inMatrix, &theNormal );
+			Q3FastVector3D_Normalize( &theNormal, &theNormal );
 			Q3AttributeSet_Add( ioAtts, kQ3AttributeTypeNormal, &theNormal );
 		}
 	}
@@ -286,6 +287,14 @@
 	return theNormals;
 }
 
+static void NormalizeNormals( TQ3Vector3D* ioNormals, TQ3Uns32 inCount )
+{
+	for (TQ3Uns32 i = 0; i < inCount; ++i)
+	{
+		Q3FastVector3D_Normalize( &ioNormals[i], &ioNormals[i] );
+	}
+}
+
 static void TransformTriMesh( const TQ3Matrix4x4* inMatrix,
 								TQ3GeometryObject ioGeom )
 {
@@ -309,6 +318,7 @@
 	{
 		Q3Vector3D_To3DTransformArray( normals, &normalTrans, normals,
 			tmData->numPoints, sizeof(TQ3Vector3D), sizeof(TQ3Vector3D) );
+		NormalizeNormals( normals, tmData->numPoints );
 	}
 
 	// face normal vectors
@@ -318,6 +328,7 @@
 	{
 		Q3Vector3D_To3DTransformArray( normals, &normalTrans, normals,
 			tmData->numTriangles, sizeof(TQ3Vector3D), sizeof(TQ3Vector3D) );
+		NormalizeNormals( normals, tmData->numTriangles );
 	}
 	
 	// Recompute the bounding box

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