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69 lines
1.6 KiB
69 lines
1.6 KiB
//========= Copyright Valve Corporation, All rights reserved. ============// |
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// |
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// Purpose: |
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// |
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// $Workfile: $ |
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// $Date: $ |
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// |
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//----------------------------------------------------------------------------- |
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// $Log: $ |
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// |
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// $NoKeywords: $ |
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//=============================================================================// |
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#if !defined(_STATIC_LINKED) || defined(_SHARED_LIB) |
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#ifdef QUIVER |
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#include "r_local.h" |
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#endif |
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#include "mathlib/bumpvects.h" |
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#include "mathlib/vector.h" |
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#include <assert.h> |
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// memdbgon must be the last include file in a .cpp file!!! |
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#include "tier0/memdbgon.h" |
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// z is coming out of the face. |
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void GetBumpNormals( const Vector& sVect, const Vector& tVect, const Vector& flatNormal, |
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const Vector& phongNormal, Vector bumpNormals[NUM_BUMP_VECTS] ) |
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{ |
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Vector tmpNormal; |
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bool leftHanded; |
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int i; |
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assert( NUM_BUMP_VECTS == 3 ); |
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// Are we left or right handed? |
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CrossProduct( sVect, tVect, tmpNormal ); |
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if( DotProduct( flatNormal, tmpNormal ) < 0.0f ) |
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{ |
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leftHanded = true; |
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} |
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else |
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{ |
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leftHanded = false; |
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} |
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// Build a basis for the face around the phong normal |
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matrix3x4_t smoothBasis; |
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CrossProduct( phongNormal.Base(), sVect.Base(), smoothBasis[1] ); |
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VectorNormalize( smoothBasis[1] ); |
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CrossProduct( smoothBasis[1], phongNormal.Base(), smoothBasis[0] ); |
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VectorNormalize( smoothBasis[0] ); |
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VectorCopy( phongNormal.Base(), smoothBasis[2] ); |
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if( leftHanded ) |
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{ |
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VectorNegate( smoothBasis[1] ); |
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} |
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// move the g_localBumpBasis into world space to create bumpNormals |
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for( i = 0; i < 3; i++ ) |
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{ |
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VectorIRotate( g_localBumpBasis[i], smoothBasis, bumpNormals[i] ); |
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} |
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} |
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#endif // !_STATIC_LINKED || _SHARED_LIB
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