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DP Tool Club 8
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VIEW.H
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C/C++ Source or Header
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1993-10-07
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1KB
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42 lines
/* Copyright (c) 1988 Regents of the University of California */
/* SCCSid "@(#)view.h 2.2 10/2/92 LBL" */
/*
* view.h - header file for image generation.
*
* 9/19/88
*/
/* view types */
#define VT_PER 'v' /* perspective */
#define VT_PAR 'l' /* parallel */
#define VT_ANG 'a' /* angular fisheye */
#define VT_HEM 'h' /* hemispherical fisheye */
typedef struct {
int type; /* view type */
FVECT vp; /* view origin */
FVECT vdir; /* view direction */
FVECT vup; /* view up */
double horiz; /* horizontal view size */
double vert; /* vertical view size */
double hoff; /* horizontal image offset */
double voff; /* vertical image offset */
FVECT hvec; /* computed horizontal image vector */
FVECT vvec; /* computed vertical image vector */
double hn2; /* DOT(hvec,hvec) */
double vn2; /* DOT(vvec,vvec) */
} VIEW; /* view parameters */
extern VIEW stdview;
extern char *setview();
#define viewaspect(v) sqrt((v)->vn2/(v)->hn2)
#define STDVIEW {VT_PER,0.,0.,0.,0.,1.,0.,0.,0.,1.,45.,45.,0.,0.}
#define VIEWSTR "VIEW="
#define VIEWSTRL 5