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/* Copyright (c) 1998 Silicon Graphics, Inc. */ |
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#ifndef lint |
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static char SCCSid[] = "$SunId$ SGI"; |
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static const char RCSid[] = "$Id$"; |
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#endif |
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/* |
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* Convert Radiance -> OpenGL surfaces. |
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*/ |
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#include "copyright.h" |
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#include "radogl.h" |
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#ifndef NSLICES |
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#define NOPOLY() if (curpolysize) {glEnd(); curpolysize = 0;} else |
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void |
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setmaterial(mp, cent, ispoly) /* prepare for new material */ |
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register MATREC *mp; |
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FVECT cent; |
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} |
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static |
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glu_error(en) /* report a tessellation error as a warning */ |
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static void |
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glu_error(en) /* report an error as a warning */ |
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GLenum en; |
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{ |
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sprintf(errmsg, "GLU error %s: %s", glu_rout, gluErrorString(en)); |
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} |
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static void |
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myCombine(coords, vertex_data, weight, dataOut) |
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register GLdouble coords[3]; |
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GLdouble *vertex_data[4]; |
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GLfloat weight[4]; |
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GLdouble **dataOut; |
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{ |
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register GLdouble *newvert; |
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|
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newvert = (GLdouble *)malloc(3*sizeof(GLdouble)); |
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if (newvert == NULL) |
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error(SYSTEM, "out of memory in myCombine"); |
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VCOPY(newvert, coords); /* no data, just coordinates */ |
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*dataOut = newvert; |
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} |
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static |
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newtess() /* allocate GLU tessellation object */ |
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{ |
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if ((gluto = gluNewTess()) == NULL) |
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error(INTERNAL, "gluNewTess failed"); |
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gluTessCallback(gluto, GLU_TESS_BEGIN, glBegin); |
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gluTessCallback(gluto, GLU_TESS_VERTEX, glVertex3dv); |
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gluTessCallback(gluto, GLU_TESS_BEGIN, (_GLUfuncptr)glBegin); |
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gluTessCallback(gluto, GLU_TESS_VERTEX, (_GLUfuncptr)glVertex3dv); |
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gluTessCallback(gluto, GLU_TESS_END, glEnd); |
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gluTessCallback(gluto, GLU_TESS_COMBINE, myCombine); |
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gluTessCallback(gluto, GLU_TESS_ERROR, glu_error); |
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gluTessProperty(gluto, GLU_TESS_WINDING_RULE, GLU_TESS_WINDING_NONZERO); |
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} |
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} |
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int |
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o_face(o) /* convert a face */ |
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register OBJREC *o; |
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{ |
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if (area <= FTINY) |
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return; |
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if (dolights) /* check for source */ |
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doflatsrc(o->os, cent, norm, area); |
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setmaterial(o->os, cent, 1); /* set material */ |
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doflatsrc((MATREC *)o->os, cent, norm, area); |
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setmaterial((MATREC *)o->os, cent, 1); /* set material */ |
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if (o->oargs.nfargs/3 != curpolysize) { |
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if (curpolysize) glEnd(); |
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curpolysize = o->oargs.nfargs/3; |
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} |
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void |
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surfclean() /* clean up surface routines */ |
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{ |
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setmaterial(NULL, NULL, 0); |
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} |
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int |
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o_sphere(o) /* convert a sphere */ |
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register OBJREC *o; |
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{ |
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} else if (o->oargs.farg[3] <= FTINY) |
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return; |
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if (dolights) |
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dosphsrc(o->os, o->oargs.farg, |
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dosphsrc((MATREC *)o->os, o->oargs.farg, |
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PI*o->oargs.farg[3]*o->oargs.farg[3]); |
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setmaterial(o->os, o->oargs.farg, 0); |
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setmaterial((MATREC *)o->os, o->oargs.farg, 0); |
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if (gluqo == NULL) newquadric(); |
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glu_rout = "making sphere"; |
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gluQuadricOrientation(gluqo, |
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(GLdouble)o->oargs.farg[2]); |
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gluSphere(gluqo, (GLdouble)o->oargs.farg[3], NSLICES, NSTACKS); |
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glPopMatrix(); |
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rgl_checkerr("creating sphere"); |
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} |
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int |
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o_cone(o) /* convert a cone or cylinder */ |
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register OBJREC *o; |
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{ |
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iscyl = o->otype==OBJ_CYLINDER | o->otype==OBJ_TUBE; |
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if (o->oargs.nfargs != (iscyl ? 7 : 8)) |
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objerror(o, "bad # real arguments"); |
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objerror(o, USER, "bad # real arguments"); |
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if (o->oargs.farg[6] < -FTINY) { |
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o->oargs.farg[6] = -o->oargs.farg[6]; |
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if (iscyl) |
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objerror(o, USER, "illegal radii"); |
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if (o->oargs.farg[6] <= FTINY && (iscyl || o->oargs.farg[7] <= FTINY)) |
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return; |
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if (o->oargs.farg[6] < 0.) /* complains for tiny neg's */ |
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o->oargs.farg[6] = 0.; |
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if (!iscyl && o->oargs.farg[7] < 0.) |
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o->oargs.farg[7] = 0.; |
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if (!iscyl) { |
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if (o->oargs.farg[6] < 0.) /* complains for tiny neg's */ |
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o->oargs.farg[6] = 0.; |
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if (o->oargs.farg[7] < 0.) |
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o->oargs.farg[7] = 0.; |
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} |
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cent[0] = .5*(o->oargs.farg[0] + o->oargs.farg[3]); |
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cent[1] = .5*(o->oargs.farg[1] + o->oargs.farg[4]); |
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cent[2] = .5*(o->oargs.farg[2] + o->oargs.farg[5]); |
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setmaterial(o->os, cent, 0); |
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setmaterial((MATREC *)o->os, cent, 0); |
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if (gluqo == NULL) newquadric(); |
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glu_rout = "making cylinder"; |
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gluQuadricOrientation(gluqo, o->otype==OBJ_CUP | o->otype==OBJ_TUBE ? |
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gluCylinder(gluqo, o->oargs.farg[6], o->oargs.farg[iscyl ? 6 : 7], |
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h, NSLICES, 1); |
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glPopMatrix(); |
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rgl_checkerr("creating cone"); |
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} |
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int |
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o_ring(o) /* convert a ring */ |
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register OBJREC *o; |
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{ |
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double x1, y1, d; |
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if (o->oargs.nfargs != 8) |
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objerror(o, "bad # real arguments"); |
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objerror(o, USER, "bad # real arguments"); |
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if (o->oargs.farg[7] < o->oargs.farg[6]) { |
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register double d = o->oargs.farg[7]; |
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o->oargs.farg[7] = o->oargs.farg[6]; |
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if (o->oargs.farg[7] - o->oargs.farg[6] <= FTINY) |
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return; |
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if (dolights) |
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doflatsrc(o->os, o->oargs.farg, o->oargs.farg+3, |
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doflatsrc((MATREC *)o->os, o->oargs.farg, o->oargs.farg+3, |
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PI*(o->oargs.farg[7]*o->oargs.farg[7] - |
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o->oargs.farg[6]*o->oargs.farg[6])); |
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setmaterial(o->os, o->oargs.farg, 0); |
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setmaterial((MATREC *)o->os, o->oargs.farg, 0); |
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if (gluqo == NULL) newquadric(); |
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glu_rout = "making disk"; |
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gluQuadricOrientation(gluqo, GLU_OUTSIDE); |
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glRotated(d, (GLdouble)x1, (GLdouble)y1, 0.); |
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gluDisk(gluqo, o->oargs.farg[6], o->oargs.farg[7], NSLICES, 1); |
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glPopMatrix(); |
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rgl_checkerr("creating ring"); |
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} |