SF.net SVN: quesa:[3113] trunk/quesa/Development/Source/Renderers/OpenGL/ QOShadowMarker.cpp

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

Revision: 3113
          http://quesa.svn.sourceforge.net/quesa/?rev=3113&view=rev
Author:   jwwalker
Date:     2010-10-07 00:19:44 +0000 (Thu, 07 Oct 2010)

Log Message:
-----------
Correct casting of shadows when using kQ3BackfacingStyleRemoveFront.

Modified Paths:
--------------
    trunk/quesa/Development/Source/Renderers/OpenGL/QOShadowMarker.cpp

Modified: trunk/quesa/Development/Source/Renderers/OpenGL/QOShadowMarker.cpp
===================================================================
--- trunk/quesa/Development/Source/Renderers/OpenGL/QOShadowMarker.cpp	2010-10-05 23:33:11 UTC (rev 3112)
+++ trunk/quesa/Development/Source/Renderers/OpenGL/QOShadowMarker.cpp	2010-10-07 00:19:44 UTC (rev 3113)
@@ -217,7 +217,29 @@
 
 
 
+static bool IsFaceVisible( TQ3BackfacingStyle inBackfacing, bool inFrontFace )
+{
+	bool	isVis = true;
+	
+	if (inBackfacing == kQ3BackfacingStyleRemove)
+	{
+		if (! inFrontFace)
+		{
+			isVis = false;
+		}
+	}
+	else if (inBackfacing == kQ3BackfacingStyleRemoveFront)
+	{
+		if (inFrontFace)
+		{
+			isVis = false;
+		}
+	}
+	
+	return isVis;
+}
 
+
 /*!
 	@function	MarkShadowOfTriMeshDirectional
 	@abstract	Mark the shadow of a TriMesh by a directional light.
@@ -278,8 +300,7 @@
 	TQ3Uns32 e;
 	for (i = 0; i < kNumFaces; ++i)
 	{
-		if ( (mStyleState.mBackfacing != kQ3BackfacingStyleRemove) ||
-			litFaceFlags[i] )
+		if ( IsFaceVisible( mStyleState.mBackfacing, litFaceFlags[i] ) )
 		{
 			const TQ3TriMeshTriangleData& theFace( inFaces[i] );
 			
@@ -409,8 +430,7 @@
 	TQ3Uns32 e;
 	for (i = 0; i < kNumFaces; ++i)
 	{
-		if ( (mStyleState.mBackfacing != kQ3BackfacingStyleRemove) ||
-			litFaceFlags[i] )
+		if ( IsFaceVisible( mStyleState.mBackfacing, litFaceFlags[i] ) )
 		{
 			const TQ3TriMeshTriangleData& theFace( inFaces[i] );
 			
@@ -559,7 +579,7 @@
 	// If the triangle is away from the light and we are removing backfaces,
 	// then the triangle should be invisible from the light and hence not cast
 	// a shadow.
-	if ( (towardLight < 0.0f) && (mStyleState.mBackfacing == kQ3BackfacingStyleRemove) )
+	if ( ! IsFaceVisible( mStyleState.mBackfacing, towardLight > 0.0f ))
 	{
 		return;
 	}


This was sent by the SourceForge.net collaborative development platform, the world's largest Open Source development site.