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/* Copyright (c) 1986 Regents of the University of California */ |
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/* SCCSid "$SunId$ LBL" */ |
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/* RCSid: $Id$ */ |
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/* |
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* source.h - header file for ray tracing sources. |
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* |
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* 8/20/85 |
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* Include after ray.h |
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*/ |
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/* ==================================================================== |
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* The Radiance Software License, Version 1.0 |
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* |
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* Copyright (c) 1990 - 2002 The Regents of the University of California, |
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* through Lawrence Berkeley National Laboratory. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* |
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* 3. The end-user documentation included with the redistribution, |
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* if any, must include the following acknowledgment: |
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* "This product includes Radiance software |
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* (http://radsite.lbl.gov/) |
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* developed by the Lawrence Berkeley National Laboratory |
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* (http://www.lbl.gov/)." |
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* Alternately, this acknowledgment may appear in the software itself, |
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* if and wherever such third-party acknowledgments normally appear. |
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* |
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* 4. The names "Radiance," "Lawrence Berkeley National Laboratory" |
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* and "The Regents of the University of California" must |
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* not be used to endorse or promote products derived from this |
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* software without prior written permission. For written |
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* permission, please contact [email protected]. |
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* |
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* 5. Products derived from this software may not be called "Radiance", |
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* nor may "Radiance" appear in their name, without prior written |
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* permission of Lawrence Berkeley National Laboratory. |
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* |
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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* DISCLAIMED. IN NO EVENT SHALL Lawrence Berkeley National Laboratory OR |
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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* ==================================================================== |
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* |
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* This software consists of voluntary contributions made by many |
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* individuals on behalf of Lawrence Berkeley National Laboratory. For more |
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* information on Lawrence Berkeley National Laboratory, please see |
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* <http://www.lbl.gov/>. |
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*/ |
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|
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#define AIMREQT 100 /* required aim success/failure */ |
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#define SDISTANT 01 /* source distant flag */ |
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#define SSPOT 010 /* source spotlight flag */ |
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#define SVIRTUAL 020 /* source virtual flag */ |
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#define SFLAT 040 /* source flat flag */ |
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#define SFOLLOW 0100 /* source follow path flag */ |
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#define SCYL 0100 /* source cylindrical flag */ |
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#define SFOLLOW 0200 /* source follow path flag */ |
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typedef struct { |
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FVECT aim; /* aim direction or center */ |
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float siz; /* output solid angle or area */ |
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float flen; /* focal length */ |
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float flen; /* focal length (negative if distant source) */ |
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} SPOT; /* spotlight */ |
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typedef struct { |
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int sflags; /* source flags */ |
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FVECT sloc; /* direction or position of source */ |
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FVECT snorm; /* surface normal of flat source */ |
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float ss; /* tangent or disk radius */ |
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float ss2; /* domega or projected area */ |
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FVECT ss[3]; /* source dimension vectors, U, V, and W */ |
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float srad; /* maximum source radius */ |
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float ss2; /* solid angle or projected area */ |
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struct { |
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float prox; /* proximity */ |
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SPOT *s; /* spot */ |
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} sl; /* localized source information */ |
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union { |
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int success; /* successes - AIMREQT*failures */ |
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int svnext; /* next source to aim for */ |
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long success; /* successes - AIMREQT*failures */ |
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struct { |
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short pn; /* projection number */ |
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int sn; /* next source to aim for */ |
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} sv; /* virtual source */ |
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} sa; /* source aiming information */ |
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long ntests, nhits; /* shadow tests and hits */ |
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OBJREC *so; /* source destination object */ |
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} SRCREC; /* light source */ |
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#define MAXSPART 64 /* maximum partitions per source */ |
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|
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#define SU 0 /* U vector or partition */ |
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#define SV 1 /* V vector or partition */ |
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#define SW 2 /* W vector or partition */ |
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#define S0 3 /* leaf partition */ |
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|
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#define snorm ss[SW] /* normal vector for flat source */ |
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|
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typedef struct { |
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FVECT dir; /* source direction */ |
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float dom; /* domega for source */ |
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COLOR val; /* contribution */ |
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} CONTRIB; /* direct contribution */ |
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int sn; /* source number */ |
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short np; /* number of partitions */ |
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short sp; /* this partition number */ |
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double dom; /* solid angle of partition */ |
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unsigned char spt[MAXSPART/2]; /* source partitioning */ |
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} SRCINDEX; /* source index structure */ |
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#define initsrcindex(s) ((s)->sn = (s)->sp = -1, (s)->np = 0) |
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#define clrpart(pt) bzero((char *)(pt), MAXSPART/2) |
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#define setpart(pt,i,v) ((pt)[(i)>>2] |= (v)<<(((i)&3)<<1)) |
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#define spart(pt,pi) ((pt)[(pi)>>2] >> (((pi)&3)<<1) & 3) |
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|
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/* |
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* Special support functions for sources |
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*/ |
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|
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/* |
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* Virtual source materials must define the following. |
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* |
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* vproj(pm, op, sp, i) Compute i'th virtual projection |
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* of source sp in object op and assign |
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* the 4x4 transformation matrix pm. |
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* Return 1 on success, 0 if no i'th projection. |
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* |
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* nproj The number of projections. The value of |
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* i passed to vproj runs from 0 to nproj-1. |
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*/ |
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|
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typedef struct { |
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int sno; /* source number */ |
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float brt; /* brightness (for comparison) */ |
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} CNTPTR; /* contribution pointer */ |
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int (*vproj)(); /* project virtual sources */ |
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int nproj; /* number of possible projections */ |
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} VSMATERIAL; /* virtual source material functions */ |
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typedef struct { |
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void (*setsrc)(); /* set light source for object */ |
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void (*partit)(); /* partition light source object */ |
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double (*getpleq)(); /* plane equation for surface */ |
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double (*getdisk)(); /* maximum disk for surface */ |
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} SOBJECT; /* source object functions */ |
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typedef union { |
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VSMATERIAL *mf; /* material functions */ |
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SOBJECT *of; /* object functions */ |
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} SRCFUNC; /* source functions */ |
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extern SRCFUNC sfun[]; /* source dispatch table */ |
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extern SRCREC *source; /* our source list */ |
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extern int nsources; /* the number of sources */ |
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extern double srcray(); /* ray to source */ |
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#define sflatform(sn,dir) -DOT(source[sn].snorm, dir) |
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extern SPOT *makespot(); /* make spotlight */ |
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#define getplaneq(c,o) (*sfun[(o)->otype].of->getpleq)(c,o) |
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#define getmaxdisk(c,o) (*sfun[(o)->otype].of->getdisk)(c,o) |
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#define setsource(s,o) (*sfun[(o)->otype].of->setsrc)(s,o) |
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extern SRCREC *newsource(); /* allocate new source */ |
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#ifdef NOPROTO |
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extern void marksources(); |
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extern void freesources(); |
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extern int srcray(); |
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extern void srcvalue(); |
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extern int sourcehit(); |
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extern void direct(); |
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extern void srcscatter(); |
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extern int m_light(); |
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extern double nextssamp(); |
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extern int skipparts(); |
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extern void nopart(); |
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extern void cylpart(); |
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extern void flatpart(); |
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extern double scylform(); |
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extern void initstypes(); |
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extern int newsource(); |
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extern void setflatss(); |
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extern void fsetsrc(); |
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extern void ssetsrc(); |
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extern void sphsetsrc(); |
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extern void rsetsrc(); |
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extern void cylsetsrc(); |
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extern SPOT *makespot(); |
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extern int spotout(); |
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extern double fgetmaxdisk(); |
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extern double rgetmaxdisk(); |
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extern double fgetplaneq(); |
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extern double rgetplaneq(); |
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extern int commonspot(); |
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extern int commonbeam(); |
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extern int checkspot(); |
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extern double spotdisk(); |
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extern double beamdisk(); |
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extern double intercircle(); |
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extern void markvirtuals(); |
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extern void addvirtuals(); |
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extern void vproject(); |
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extern OBJREC *vsmaterial(); |
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extern int makevsrc(); |
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extern double getdisk(); |
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extern int vstestvis(); |
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extern void virtverb(); |
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#else |
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/* defined in source.c */ |
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extern void marksources(void); |
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extern void freesources(void); |
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extern int srcray(RAY *sr, RAY *r, SRCINDEX *si); |
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extern void srcvalue(RAY *r); |
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extern int sourcehit(RAY *r); |
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extern void direct(RAY *r, void (*f)(), char *p); |
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extern void srcscatter(RAY *r); |
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extern int m_light(OBJREC *m, RAY *r); |
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/* defined in srcsamp.c */ |
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extern double nextssamp(RAY *r, SRCINDEX *si); |
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extern int skipparts(int ct[3], int sz[3], int pp[2], unsigned char *pt); |
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extern void nopart(SRCINDEX *si, RAY *r); |
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extern void cylpart(SRCINDEX *si, RAY *r); |
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extern void flatpart(SRCINDEX *si, RAY *r); |
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extern double scylform(int sn, FVECT dir); |
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/* defined in srcsupp.c */ |
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extern void initstypes(void); |
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extern int newsource(void); |
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extern void setflatss(SRCREC *src); |
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extern void fsetsrc(SRCREC *src, OBJREC *so); |
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extern void ssetsrc(SRCREC *src, OBJREC *so); |
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extern void sphsetsrc(SRCREC *src, OBJREC *so); |
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extern void rsetsrc(SRCREC *src, OBJREC *so); |
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extern void cylsetsrc(SRCREC *src, OBJREC *so); |
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extern SPOT *makespot(OBJREC *m); |
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extern int spotout(RAY *r, SPOT *s); |
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extern double fgetmaxdisk(FVECT ocent, OBJREC *op); |
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extern double rgetmaxdisk(FVECT ocent, OBJREC *op); |
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extern double fgetplaneq(FVECT nvec, OBJREC *op); |
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extern double rgetplaneq(FVECT nvec, OBJREC *op); |
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extern int commonspot(SPOT *sp1, SPOT *sp2, FVECT org); |
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extern int commonbeam(SPOT *sp1, SPOT *sp2, FVECT org); |
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extern int checkspot(SPOT *sp, FVECT nrm); |
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extern double spotdisk(FVECT oc, OBJREC *op, SPOT *sp, FVECT pos); |
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extern double beamdisk(FVECT oc, OBJREC *op, SPOT *sp, FVECT dir); |
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extern double intercircle(FVECT cc, FVECT c1, FVECT c2, |
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double r1s, double r2s); |
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/* defined in virtuals.c */ |
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extern void markvirtuals(void); |
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extern void addvirtuals(int sn, int nr); |
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extern void vproject(OBJREC *o, int sn, int n); |
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extern OBJREC *vsmaterial(OBJREC *o); |
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extern int makevsrc(OBJREC *op, int sn, MAT4 pm); |
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extern double getdisk(FVECT oc, OBJREC *op, int sn); |
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extern int vstestvis(int f, OBJREC *o, FVECT oc, double or2, int sn); |
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extern void virtverb(int sn, FILE *fp); |
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#endif |
