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>
73 lines
1.4 KiB
C++
73 lines
1.4 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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float recip, temp, cc;
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d[X0] = s[0][X];
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d[Y0] = s[0][Y];
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d[X1] = s[i][X] - s[0][X];
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d[Y1] = s[i][Y] - s[0][Y];
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d[X2] = s[i+1][X] - s[0][X];
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d[Y2] = s[i+1][Y] - s[0][Y];
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cc = d[X1]*d[Y2] - d[Y1]*d[X2];
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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; /* is polygon degenerate ? */
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recip = 1.0f/cc;
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d[X1] *= recip;
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d[Y1] *= recip;
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d[X2] *= recip;
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d[Y2] *= recip;
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return(0);
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}
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#define FitPlane(A, B, C, d,x0,x1,x2) \
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{ \
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dz1 = (x1) - (x0); \
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dz2 = (x2) - (x0); \
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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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