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| author | Joe Ludwig <[email protected]> | 2013-06-26 15:22:04 -0700 |
|---|---|---|
| committer | Joe Ludwig <[email protected]> | 2013-06-26 15:22:04 -0700 |
| commit | 39ed87570bdb2f86969d4be821c94b722dc71179 (patch) | |
| tree | abc53757f75f40c80278e87650ea92808274aa59 /sp/src/public/bitmap/cubemap.h | |
| download | source-sdk-2013-39ed87570bdb2f86969d4be821c94b722dc71179.tar.xz source-sdk-2013-39ed87570bdb2f86969d4be821c94b722dc71179.zip | |
First version of the SOurce SDK 2013
Diffstat (limited to 'sp/src/public/bitmap/cubemap.h')
| -rw-r--r-- | sp/src/public/bitmap/cubemap.h | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/sp/src/public/bitmap/cubemap.h b/sp/src/public/bitmap/cubemap.h new file mode 100644 index 00000000..7e95a391 --- /dev/null +++ b/sp/src/public/bitmap/cubemap.h @@ -0,0 +1,68 @@ +//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: a class for performing cube-mapped spherical sample lookups.
+//
+// $Workfile: $
+// $Date: $
+// $NoKeywords: $
+//===========================================================================//
+
+#ifndef CUBEMAP_H
+#define CUBEMAP_H
+
+#ifdef _WIN32
+#pragma once
+#endif
+
+#include "tier0/platform.h"
+#include "tier1/utlmemory.h"
+#include "mathlib/mathlib.h"
+
+template<class T, int RES> struct CCubeMap
+{
+ T m_Samples[6][RES][RES];
+
+public:
+ FORCEINLINE void GetCoords( Vector const &vecNormalizedDirection, int &nX, int &nY, int &nFace )
+ {
+ // find largest magnitude component
+ int nLargest = 0;
+ int nAxis0 = 1;
+ int nAxis1 = 2;
+ if ( fabs( vecNormalizedDirection[1] ) > fabs( vecNormalizedDirection[0] ) )
+ {
+ nLargest = 1;
+ nAxis0 = 0;
+ nAxis1 = 2;
+ }
+ if ( fabs( vecNormalizedDirection[2] ) > fabs( vecNormalizedDirection[nLargest] ) )
+ {
+ nLargest = 2;
+ nAxis0 = 0;
+ nAxis1 = 1;
+ }
+ float flZ = vecNormalizedDirection[nLargest];
+ if ( flZ < 0 )
+ {
+ flZ = - flZ;
+ nLargest += 3;
+ }
+ nFace = nLargest;
+ flZ = 1.0 / flZ;
+ nX = RemapValClamped( vecNormalizedDirection[nAxis0] * flZ, -1, 1, 0, RES - 1 );
+ nY = RemapValClamped( vecNormalizedDirection[nAxis1] * flZ, -1, 1, 0, RES - 1 );
+ }
+
+ FORCEINLINE T & GetSample( Vector const &vecNormalizedDirection )
+ {
+ int nX, nY, nFace;
+ GetCoords( vecNormalizedDirection, nX, nY, nFace );
+ return m_Samples[nFace][nX][nY];
+ }
+};
+
+
+
+
+
+#endif // CUBEMAP_H
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