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#include "glare.h" |
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< |
#define FEQ(a,b) ((a)-(b)<=FTINY&&(a)-(b)<=FTINY) |
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#define FEQ(a,b) ((a)-(b)<=FTINY&&(b)-(a)<=FTINY) |
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#define VEQ(v1,v2) (FEQ((v1)[0],(v2)[0])&&FEQ((v1)[1],(v2)[1]) \ |
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&&FEQ((v1)[2],(v2)[2])) |
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< |
char *rtargv[32] = {"rtrace", "-h", "-ov", "-fff"}; |
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char *rtargv[32] = {"rtrace", "-h-", "-ov", "-fff"}; |
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int rtargc = 4; |
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VIEW ourview = STDVIEW; /* our view */ |
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} |
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int |
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angcmp(ap1, ap2) /* compare two angles */ |
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ANGLE *ap1, *ap2; |
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{ |
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register int a1, a2; |
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|
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a1 = *ap1; |
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a2 = *ap2; |
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if (a1 == a2) { |
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fprintf(stderr, "%s: duplicate glare angle (%d)\n", |
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progname, a1); |
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exit(1); |
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} |
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return(a1-a2); |
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} |
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|
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|
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init() /* initialize global variables */ |
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{ |
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double d; |
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/* set direction vectors */ |
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for (i = 0; glarang[i] != AEND; i++) |
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; |
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< |
if (i > 0 && (glarang[0] <= 0 || glarang[i-1] >= 180)) { |
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< |
fprintf(stderr, "%s: glare angles must be between 1 and 179\n", |
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qsort(glarang, i, sizeof(ANGLE), angcmp); |
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if (i > 0 && (glarang[0] <= 0 || glarang[i-1] > 180)) { |
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fprintf(stderr, "%s: glare angles must be between 1 and 180\n", |
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progname); |
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exit(1); |
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} |
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FVECT org; /* dummy variable */ |
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hl = hlim(y); |
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< |
if (x <= -hl) /* left region */ |
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if (x <= -hl) { /* left region */ |
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if (x <= -hl-sampdens) |
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return(-1); |
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return(viewray(org, vd, &leftview, |
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(double)(x+hl)/(2*sampdens)+.5, |
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(double)y/(2*sampdens)+.5)); |
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< |
if (x >= hl) /* right region */ |
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} |
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if (x >= hl) { /* right region */ |
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if (x >= hl+sampdens) |
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return(-1); |
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return(viewray(org, vd, &rightview, |
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(double)(x-hl)/(2*sampdens)+.5, |
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(double)y/(2*sampdens)+.5)); |
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} |
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/* central region */ |
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if (viewray(org, vd, &ourview, .5, (double)y/(2*sampdens)+.5) < 0) |
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return(-1); |