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/* Copyright (c) 1996 Regents of the University of California */ |
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#ifndef lint |
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static char SCCSid[] = "$SunId$ LBL"; |
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static const char RCSid[] = "$Id$"; |
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#endif |
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/* |
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* Convert MGF (Materials and Geometry Format) to Radiance |
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*/ |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <math.h> |
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#include <string.h> |
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#include "mgflib/parser.h" |
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if (r2 == 0.) |
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return(MG_EILL); |
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inv = r2 < 0.; |
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} else if (r2 != 0. && inv ^ r2 < 0.) |
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} else if (r2 != 0. && inv ^ (r2 < 0.)) |
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return(MG_EILL); |
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if (inv) { |
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r1 = -r1; |
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xf_rotvect(norm, cv->n); /* rotate normal */ |
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r1 = xf_scale(atof(av[2])); /* scale radii */ |
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r2 = xf_scale(atof(av[3])); |
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if (r1 < 0. | r2 <= r1) |
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if ((r1 < 0.) | (r2 <= r1)) |
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return(MG_EILL); |
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if ((mat = material()) == NULL) /* get material */ |
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return(MG_EBADMAT); |
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char **av; |
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{ |
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static int nfaces; |
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int myi = invert; |
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char *mat; |
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register int i; |
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register C_VERTEX *cv; |
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if (is0vect(cva[i-1]->n)) |
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break; |
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} |
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if (i == ac) { |
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if (i < ac) |
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i = ISFLAT; |
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else |
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i = flat_tri(cva[0]->p, cva[1]->p, cva[2]->p, |
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cva[0]->n, cva[1]->n, cva[2]->n); |
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if (i < 0) |
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return(MG_OK); /* degenerate (error?) */ |
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if (i == DEGEN) |
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return(MG_OK); /* degenerate (error?) */ |
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if (i == RVBENT) { |
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myi = !myi; |
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i = ISBENT; |
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} else if (i == RVFLAT) { |
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myi = !myi; |
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i = ISFLAT; |
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} |
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if (!i) { /* smoothed triangles */ |
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do_tri(mat, cva[0], cva[1], cva[2]); |
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if (i == ISBENT) { /* smoothed triangles */ |
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do_tri(mat, cva[0], cva[1], cva[2], myi); |
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if (ac == 5) |
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do_tri(mat, cva[2], cva[3], cva[0]); |
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do_tri(mat, cva[2], cva[3], cva[0], myi); |
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return(MG_OK); |
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} |
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} |
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printf("\n%s polygon %sf%d\n", mat, object(), ++nfaces); |
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printf("0\n0\n%d\n", 3*(ac-1)); |
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for (i = 1; i < ac; i++) { /* get, transform, print each vertex */ |
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if ((cv = c_getvert(av[invert ? ac-i : i])) == NULL) |
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if ((cv = c_getvert(av[myi ? ac-i : i])) == NULL) |
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return(MG_EUNDEF); |
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xf_xfmpoint(v, cv->p); |
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putv(v); |
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} |
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do_tri(mat, cv1, cv2, cv3) /* put out smoothed triangle */ |
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do_tri(mat, cv1, cv2, cv3, iv) /* put out smoothed triangle */ |
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char *mat; |
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C_VERTEX *cv1, *cv2, *cv3; |
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int iv; |
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{ |
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static int ntris; |
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BARYCCM bvecs; |
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FLOAT bcoor[3][3]; |
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RREAL bcoor[3][3]; |
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C_VERTEX *cvt; |
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FVECT v1, v2, v3; |
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FVECT n1, n2, n3; |
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register int i; |
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if (invert) { /* swap vertex order if inverted */ |
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if (iv) { /* swap vertex order if inverted */ |
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cvt = cv1; |
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cv1 = cv3; |
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cv3 = cvt; |
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} |
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d = c_cmaterial->rd + c_cmaterial->td + |
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c_cmaterial->rs + c_cmaterial->ts; |
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if (d < 0. | d > 1.) |
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if ((d < 0.) | (d > 1.)) |
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return(NULL); |
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/* check for glass/dielectric */ |
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if (c_cmaterial->nr > 1.1 && |
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register char *op, *arg; |
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{ |
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*op = ' '; |
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while (*++op = *arg++) |
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while ( (*++op = *arg++) ) |
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; |
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return(op); |
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} |
