75 lines
2.0 KiB
C++
75 lines
2.0 KiB
C++
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//========= Copyright Valve Corporation, All rights reserved. ============//
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//
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// Purpose:
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//
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//===========================================================================//
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#include "tier0/platform.h"
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#include "tier0/progressbar.h"
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#include "bitmap/float_bm.h"
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#include "mathlib/mathlib.h"
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#include "tier1/strtools.h"
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#include "tier2/tier2.h"
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#include "tier0/memdbgon.h"
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static float RangeAdjust( float x )
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{
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return (2*(x-.5));
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}
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static float saturate_and_square( float x )
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{
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x=max(0.f,min(1.f, x) );
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return x * x;
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}
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#define OO_SQRT_3 0.57735025882720947f
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static Vector bumpBasis[3] = {
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Vector( 0.81649661064147949f, 0.0f, OO_SQRT_3 ),
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Vector( -0.40824833512306213f, 0.70710676908493042f, OO_SQRT_3 ),
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Vector( -0.40824821591377258f, -0.7071068286895752f, OO_SQRT_3 )
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};
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void main(int argc,char **argv)
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{
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InitCommandLineProgram( argc, argv );
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if (argc != 2)
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{
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printf("format is 'normal2ssbump filename.tga\n");
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}
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else
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{
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ReportProgress( "reading src texture",0,0 );
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FloatBitMap_t src_texture(argv[1]);
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for(int y=0;y<src_texture.Height;y++)
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{
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ReportProgress( "Converting to ssbump format",src_texture.Height,y );
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for(int x=0;x<src_texture.Width;x++)
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{
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Vector n( RangeAdjust( src_texture.Pixel( x,y,0 ) ),
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RangeAdjust( src_texture.Pixel( x,y,1 ) ),
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RangeAdjust( src_texture.Pixel( x,y,2 ) ) );
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Vector dp( saturate_and_square( DotProduct( n, bumpBasis[0] ) ),
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saturate_and_square( DotProduct( n, bumpBasis[1] ) ),
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saturate_and_square( DotProduct( n, bumpBasis[2] ) ) );
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float sum = DotProduct(dp, Vector(1,1,1));
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dp *= 1.0/sum;
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src_texture.Pixel(x,y,0) = dp.x;
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src_texture.Pixel(x,y,1) = dp.y;
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src_texture.Pixel(x,y,2) = dp.z;
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}
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}
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char oname[1024];
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strcpy(oname,argv[1]);
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char *dot=Q_stristr(oname,"_normal");
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if (! dot)
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dot=strchr(oname,'.');
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if (! dot)
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dot=oname+strlen(oname);
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strcpy(dot,"_ssbump.tga");
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printf( "\nWriting %s\n",oname );
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src_texture.WriteTGAFile( oname );
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}
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}
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