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/* RCSid: $Id$ */ |
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/* RCSid $Id$ */ |
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/* |
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* Common definitions for interreflection routines. |
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* |
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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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#ifndef _RAD_AMBIENT_H_ |
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#define _RAD_AMBIENT_H_ |
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#ifdef __cplusplus |
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extern "C" { |
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#endif |
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/* |
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* Since we've defined our vectors as float below to save space, |
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* watch out for changes in the definitions of VCOPY() and DOT() |
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* and don't pass these vectors to fvect routines. |
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* Normal and u-vector directions encoded using dircode.c |
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*/ |
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typedef struct ambrec { |
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unsigned long latick; /* last accessed tick */ |
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struct ambrec *next; /* next in list */ |
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float pos[3]; /* position in space */ |
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float dir[3]; /* normal direction */ |
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int lvl; /* recursion level of parent ray */ |
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int32 ndir; /* encoded surface normal */ |
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int32 udir; /* u-vector direction */ |
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short lvl; /* recursion level of parent ray */ |
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float weight; /* weight of parent ray */ |
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float rad; /* validity radius */ |
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float rad[2]; /* anisotropic radii (rad[0] <= rad[1]) */ |
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COLOR val; /* computed ambient value */ |
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float gpos[3]; /* gradient wrt. position */ |
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float gdir[3]; /* gradient wrt. direction */ |
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struct ambrec *next; /* next in list */ |
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float gpos[2]; /* (u,v) gradient wrt. position */ |
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float gdir[2]; /* (u,v) gradient wrt. direction */ |
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uint32 corral; /* potential light leak direction flags */ |
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} AMBVAL; /* ambient value */ |
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typedef struct ambtree { |
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struct ambtree *kid; /* 8 child nodes */ |
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} AMBTREE; /* ambient octree */ |
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|
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typedef struct { |
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short t, p; /* theta, phi indices */ |
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COLOR v; /* value sum */ |
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float r; /* 1/distance sum */ |
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float k; /* variance for this division */ |
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int n; /* number of subsamples */ |
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} AMBSAMP; /* ambient sample division */ |
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|
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typedef struct { |
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FVECT ux, uy, uz; /* x, y and z axis directions */ |
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short nt, np; /* number of theta and phi directions */ |
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} AMBHEMI; /* ambient sample hemisphere */ |
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|
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extern double maxarad; /* maximum ambient radius */ |
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extern double minarad; /* minimum ambient radius */ |
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#ifndef AVGREFL |
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#define AVGREFL 0.5 /* assumed average reflectance */ |
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#endif |
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#define AMBVALSIZ 75 /* number of bytes in portable AMBVAL struct */ |
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#define AMBMAGIC 557 /* magic number for ambient value files */ |
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#define AMBVALSIZ 67 /* number of bytes in portable AMBVAL struct */ |
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#define AMBMAGIC 559 /* magic number for ambient value files */ |
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#define AMBFMT "Radiance_ambval" /* format id string */ |
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#ifdef NOPROTO |
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extern int divsample(); |
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extern double doambient(); |
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extern void inithemi(); |
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extern void comperrs(); |
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extern void posgradient(); |
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extern void dirgradient(); |
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extern void setambres(); |
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extern void setambacc(); |
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extern void setambient(); |
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extern void ambdone(); |
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extern void ambnotify(); |
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extern void ambient(); |
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extern double sumambient(); |
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extern double makeambient(); |
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extern void extambient(); |
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extern int ambsync(); |
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extern void putambmagic(); |
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extern int hasambmagic(); |
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extern int writambval(); |
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extern int ambvalOK(); |
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extern int readambval(); |
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extern void lookamb(); |
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extern void writamb(); |
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|
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#else |
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/* defined in ambcomp.c */ |
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extern int divsample(AMBSAMP *dp, AMBHEMI *h, RAY *r); |
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extern double doambient(COLOR acol, RAY *r, double wt, FVECT pg, FVECT dg); |
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extern void inithemi(AMBHEMI *hp, RAY *r, double wt); |
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extern void comperrs(AMBSAMP *da, AMBHEMI *hp); |
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extern void posgradient(FVECT gv, AMBSAMP *da, AMBHEMI *hp); |
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extern void dirgradient(FVECT gv, AMBSAMP *da, AMBHEMI *hp); |
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/* defined in ambient.c */ |
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extern void setambres(int ar); |
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extern void setambacc(double newa); |
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extern void setambient(void); |
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extern void multambient(COLOR aval, RAY *r, FVECT nrm); |
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extern void ambdone(void); |
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extern void ambnotify(OBJECT obj); |
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extern void ambient(COLOR acol, RAY *r, FVECT nrm); |
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extern double sumambient(COLOR acol, RAY *r, FVECT rn, int al, |
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AMBTREE *at, FVECT c0, double s); |
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extern double makeambient(COLOR acol, RAY *r, FVECT rn, int al); |
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extern void extambient(COLOR cr, AMBVAL *ap, FVECT pv, FVECT nv); |
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extern int ambsync(void); |
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/* defined in ambcomp.c */ |
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extern int doambient(COLOR acol, RAY *r, double wt, |
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FVECT uv[2], float rad[2], |
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float gpos[2], float gdir[2], uint32 *crlp); |
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/* defined in ambio.c */ |
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extern void putambmagic(FILE *fp); |
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extern int hasambmagic(FILE *fp); |
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extern int writambval(AMBVAL *av, FILE *fp); |
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extern int ambvalOK(AMBVAL *av); |
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extern int readambval(AMBVAL *av, FILE *fp); |
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/* defined in lookamb.c */ |
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extern void lookamb(FILE *fp); |
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extern void writamb(FILE *fp); |
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extern int ambvalOK(AMBVAL *av); |
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|
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#ifdef __cplusplus |
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} |
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#endif |
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#endif /* _RAD_AMBIENT_H_ */ |
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|
