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/* RCSid: $Id$ */
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/*
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* view.h - header file for image generation.
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*
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* Include after fvect.h
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* Includes resolu.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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#include "resolu.h"
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/* view types */
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#define VT_PER 'v' /* perspective */
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#define VT_PAR 'l' /* parallel */
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#define VT_ANG 'a' /* angular fisheye */
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#define VT_HEM 'h' /* hemispherical fisheye */
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#define VT_CYL 'c' /* cylindrical panorama */
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typedef struct {
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int type; /* view type */
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FVECT vp; /* view origin */
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FVECT vdir; /* view direction */
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FVECT vup; /* view up */
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double horiz; /* horizontal view size */
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double vert; /* vertical view size */
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double hoff; /* horizontal image offset */
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double voff; /* vertical image offset */
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double vfore; /* fore clipping plane */
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double vaft; /* aft clipping plane (<=0 for inf) */
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FVECT hvec; /* computed horizontal image vector */
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FVECT vvec; /* computed vertical image vector */
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double hn2; /* DOT(hvec,hvec) */
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double vn2; /* DOT(vvec,vvec) */
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} VIEW; /* view parameters */
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extern VIEW stdview;
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#define viewaspect(v) sqrt((v)->vn2/(v)->hn2)
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#define STDVIEW {VT_PER,{0.,0.,0.},{0.,1.,0.},{0.,0.,1.}, \
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45.,45.,0.,0.,0.,0., \
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{0.,0.,0.},{0.,0.,0.},0.,0.}
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#define VIEWSTR "VIEW="
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#define VIEWSTRL 5
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#ifdef NOPROTO
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extern char *setview();
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extern void normaspect();
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extern double viewray();
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extern void viewloc();
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extern void pix2loc();
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extern void loc2pix();
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extern int getviewopt();
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extern int sscanview();
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extern void fprintview();
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extern char *viewopt();
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extern int isview();
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extern int viewfile();
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#else
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extern char *setview(VIEW *v);
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extern void normaspect(double va, double *ap, int *xp, int *yp);
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extern double viewray(FVECT orig, FVECT direc, VIEW *v, double x, double y);
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extern void viewloc(FVECT ip, VIEW *v, FVECT p);
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extern void pix2loc(FLOAT loc[2], RESOLU *rp, int px, int py);
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extern void loc2pix(int pp[2], RESOLU *rp, double lx, double ly);
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extern int getviewopt(VIEW *v, int ac, char *av[]);
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extern int sscanview(VIEW *vp, char *s);
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extern void fprintview(VIEW *vp, FILE *fp);
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extern char *viewopt(VIEW *vp);
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extern int isview(char *s);
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extern int viewfile(char *fname, VIEW *vp, RESOLU *rp);
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#endif
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