mirror of
https://github.com/nillerusr/source-engine.git
synced 2024-12-22 06:06:50 +00:00
69 lines
1.6 KiB
C++
69 lines
1.6 KiB
C++
//========= Copyright Valve Corporation, All rights reserved. ============//
|
|
//
|
|
// Purpose:
|
|
//
|
|
// $Workfile: $
|
|
// $Date: $
|
|
//
|
|
//-----------------------------------------------------------------------------
|
|
// $Log: $
|
|
//
|
|
// $NoKeywords: $
|
|
//=============================================================================//
|
|
|
|
#if !defined(_STATIC_LINKED) || defined(_SHARED_LIB)
|
|
|
|
|
|
#ifdef QUIVER
|
|
#include "r_local.h"
|
|
#endif
|
|
#include "mathlib/bumpvects.h"
|
|
#include "mathlib/vector.h"
|
|
#include <assert.h>
|
|
|
|
// memdbgon must be the last include file in a .cpp file!!!
|
|
#include "tier0/memdbgon.h"
|
|
|
|
// z is coming out of the face.
|
|
|
|
void GetBumpNormals( const Vector& sVect, const Vector& tVect, const Vector& flatNormal,
|
|
const Vector& phongNormal, Vector bumpNormals[NUM_BUMP_VECTS] )
|
|
{
|
|
Vector tmpNormal;
|
|
bool leftHanded;
|
|
int i;
|
|
|
|
assert( NUM_BUMP_VECTS == 3 );
|
|
|
|
// Are we left or right handed?
|
|
CrossProduct( sVect, tVect, tmpNormal );
|
|
if( DotProduct( flatNormal, tmpNormal ) < 0.0f )
|
|
{
|
|
leftHanded = true;
|
|
}
|
|
else
|
|
{
|
|
leftHanded = false;
|
|
}
|
|
|
|
// Build a basis for the face around the phong normal
|
|
matrix3x4_t smoothBasis;
|
|
CrossProduct( phongNormal.Base(), sVect.Base(), smoothBasis[1] );
|
|
VectorNormalize( smoothBasis[1] );
|
|
CrossProduct( smoothBasis[1], phongNormal.Base(), smoothBasis[0] );
|
|
VectorNormalize( smoothBasis[0] );
|
|
VectorCopy( phongNormal.Base(), smoothBasis[2] );
|
|
|
|
if( leftHanded )
|
|
{
|
|
VectorNegate( smoothBasis[1] );
|
|
}
|
|
|
|
// move the g_localBumpBasis into world space to create bumpNormals
|
|
for( i = 0; i < 3; i++ )
|
|
{
|
|
VectorIRotate( g_localBumpBasis[i], smoothBasis, bumpNormals[i] );
|
|
}
|
|
}
|
|
|
|
#endif // !_STATIC_LINKED || _SHARED_LIB
|