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#ifndef lint |
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static const char RCSid[] = "$Id$"; |
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#endif |
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/* |
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* Read and write portable ambient values |
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* |
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* Declarations of external symbols in ambient.h |
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*/ |
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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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#include "ray.h" |
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|
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#include "ambient.h" |
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|
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|
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#define putvec(v,fp) putflt((v)[0],fp);putflt((v)[1],fp);putflt((v)[2],fp) |
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|
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#define getvec(v,fp) (v)[0]=getflt(fp);(v)[1]=getflt(fp);(v)[2]=getflt(fp) |
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|
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#define badflt(x) ((x) < -FHUGE || (x) > FHUGE) |
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|
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#define badvec(v) (badflt((v)[0]) || badflt((v)[1]) || badflt((v)[2])) |
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|
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|
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|
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void |
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putambmagic(fp) /* write out ambient value magic number */ |
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FILE *fp; |
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{ |
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putint((long)AMBMAGIC, 2, fp); |
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} |
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|
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|
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int |
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hasambmagic(fp) /* read in and check validity of magic # */ |
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FILE *fp; |
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{ |
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register int magic; |
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|
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magic = getint(2, fp); |
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if (feof(fp)) |
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return(0); |
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return(magic == AMBMAGIC); |
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} |
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|
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|
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int |
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writambval(av, fp) /* write ambient value to stream */ |
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register AMBVAL *av; |
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FILE *fp; |
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{ |
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COLR col; |
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|
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putint((long)av->lvl, 1, fp); |
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putflt(av->weight, fp); |
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putvec(av->pos, fp); |
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putvec(av->dir, fp); |
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setcolr(col, colval(av->val,RED), |
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colval(av->val,GRN), colval(av->val,BLU)); |
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fwrite((char *)col, sizeof(col), 1, fp); |
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putflt(av->rad, fp); |
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putvec(av->gpos, fp); |
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putvec(av->gdir, fp); |
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return(ferror(fp) ? -1 : 0); |
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} |
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|
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|
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int |
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ambvalOK(av) /* check consistency of ambient value */ |
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register AMBVAL *av; |
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{ |
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double d; |
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|
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if (badvec(av->pos)) return(0); |
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if (badvec(av->dir)) return(0); |
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d = DOT(av->dir,av->dir); |
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if (d < 0.9999 || d > 1.0001) return(0); |
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if (av->lvl < 0 || av->lvl > 100) return(0); |
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if (av->weight <= 0. || av->weight > 1.) return(0); |
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if (av->rad <= 0. || av->rad >= FHUGE) return(0); |
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if (colval(av->val,RED) < 0. || |
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colval(av->val,RED) > FHUGE || |
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colval(av->val,GRN) < 0. || |
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colval(av->val,GRN) > FHUGE || |
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colval(av->val,BLU) < 0. || |
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colval(av->val,BLU) > FHUGE) return(0); |
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if (badvec(av->gpos)) return(0); |
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if (badvec(av->gdir)) return(0); |
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return(1); |
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} |
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|
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|
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int |
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readambval(av, fp) /* read ambient value from stream */ |
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register AMBVAL *av; |
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FILE *fp; |
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{ |
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COLR col; |
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|
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av->lvl = getint(1, fp); |
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if (feof(fp)) |
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return(0); |
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av->weight = getflt(fp); |
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getvec(av->pos, fp); |
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getvec(av->dir, fp); |
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if (fread((char *)col, sizeof(col), 1, fp) != 1) |
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return(0); |
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colr_color(av->val, col); |
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av->rad = getflt(fp); |
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getvec(av->gpos, fp); |
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getvec(av->gdir, fp); |
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return(feof(fp) ? 0 : ambvalOK(av)); |
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} |