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#include "glare.h" |
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#include "random.h" |
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#define FEQ(a,b) ((a)-(b)<=FTINY&&(a)-(b)<=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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struct illum *indirect; /* array of indirect illuminances */ |
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long npixinvw; /* number of pixels in view */ |
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long npixmiss; /* number of pixels missed */ |
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main(argc, argv) |
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int argc; |
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char *argv[]; |
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indirect = (struct illum *)calloc(nglardirs, sizeof(struct illum)); |
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if (indirect == NULL) |
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memerr("indirect illuminances"); |
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npixinvw = npixmiss = 0L; |
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copystruct(&leftview, &ourview); |
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copystruct(&rightview, &ourview); |
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spinvector(leftview.vdir, ourview.vdir, ourview.vup, maxtheta); |
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close_pict(); |
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if (octree != NULL) |
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done_rtrace(); |
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if (npixinvw < 100*npixmiss) |
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fprintf(stderr, "%s: warning -- missing %ld%% of samples\n", |
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progname, 100L*npixmiss/npixinvw); |
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} |
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FVECT vd; |
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int x, y; |
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{ |
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long t; |
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FVECT org; /* dummy variable */ |
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if (x <= -hlim) /* left region */ |
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return(viewray(org, vd, &leftview, |
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(x+hlim)/(2.*sampdens)+.5, |
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y/(2.*sampdens)+.5)); |
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(double)(x+hlim)/(2*sampdens)+.5, |
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(double)y/(2*sampdens)+.5)); |
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if (x >= hlim) /* right region */ |
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return(viewray(org, vd, &rightview, |
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(x-hlim)/(2.*sampdens)+.5, |
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y/(2.*sampdens)+.5)); |
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/* central region */ |
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if (viewray(org, vd, &ourview, .5, y/(2.*sampdens)+.5) < 0) |
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(double)(x-hlim)/(2*sampdens)+.5, |
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(double)y/(2*sampdens)+.5)); |
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/* central region */ |
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/* avoid over-counting of poles */ |
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t = random() % vsize; |
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if (t*t >= (long)vsize*vsize - (long)y*y) |
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return(-1); |
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if (viewray(org, vd, &ourview, .5, (double)y/(2*sampdens)+.5) < 0) |
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return(-1); |
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spinvector(vd, vd, ourview.vup, h_theta(x)); |
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return(0); |