CydandClaude Fable 5
db7745fcd0
Un-ignored: the dev drive is the ground truth the restoration and emulator work constantly reference (DPL3/LIBDPL + VRENDER i860 renderer source, BT/RP live+dev game trees, VGL_LABS pod boot, scene/audio content). Kept in-repo for the pod-owner community. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
93 lines
1.6 KiB
C++
93 lines
1.6 KiB
C++
#define X0 0
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#define Y0 1
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#define X1 2
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#define Y1 3
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#define X2 4
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#define Y2 5
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#define X 0
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#define Y 1
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#define Z 2
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#define W 3
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#define MINAREA 1.0e-5
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typedef float POINT[4];
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static int CalcDeltas2 ( POINT *s, int i, float *d)
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{
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int j;
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float recip, temp, cc;
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float dx0,dy0,dx1,dy1,dx2,dy2;
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float sx0,sy0,sx1,sy1,sx2,sy2;
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for (j=0; j<8; j++ ) {
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sx0=s[0][X];
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sy0=s[0][Y];
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sx1=s[1][X];
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sy1=s[1][Y];
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sx2=s[2][X];
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sy2=s[2][Y];
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dx0 = sx0;
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dy0 = sy0;
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dx1 = sx1 - sx0;
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dy1 = sy1 - sy0;
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dx2 = sx2 - sx0;
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dy2 = sy2 - sy0;
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cc = dx1*dy2 - dy1*dx2;
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/*
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temp = cc;
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if (cc < 0)
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temp = -cc;
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if (temp < MINAREA) return -1;
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*/
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recip = 1.0f/cc;
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d[X1] = dx1*recip;
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d[Y1] = dy1*recip;
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d[X2] = dx2*recip;
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d[Y2] = dy2*recip;
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d[X0] = dx0;
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d[X1] = dy0;
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d+=16;
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s+=3;
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}
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}
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#define FitPlane(A, B, C, d,z0,z1,z2) \
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{ \
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dz1 = (z1) - (z0); \
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dz2 = (z2) - (z0); \
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A = d[Y2]*dz1 - d[Y1]*dz2; \
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B = d[X1]*dz2 - d[X2]*dz1; \
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C = (x0) - A * d[X0] - B * d[Y0]; \
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}
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static void test ( float *coeff )
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{
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register float A, B, C, dz1, dz2;
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POINT tri[3];
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float deltas[6];
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CalcDeltas2 ( tri, 1, deltas );
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FitPlane ( A, B, C, deltas, tri[0][Z], tri[1][Z], tri[2][Z] );
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*coeff++=A;
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*coeff++=B;
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*coeff++=C;
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FitPlane ( A, B, C, deltas, tri[0][W], tri[1][W], tri[2][W] );
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*coeff++=A;
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*coeff++=B;
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*coeff++=C;
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}
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