3dCamera.h

/*****************************************************************************
 *	File:		3dCamera.h
 *
 *	© 1989 Mark M. Owen. All rights reserved.
 *****************************************************************************/

#ifndef _3d_
#include "3d.h"
#endif

#ifndef	_Camera_
#define	_Camera_

/*	Horizontal angles of view for 35mm Camera Lens equivalence
 *	when used on a 640x480 screen.  A 35mm film frame has an
 *	aspect ratio of 0.666É whereas the 640x480 screen is 0.75.
 *	For example:  using the Lens40mm selection below will cause
 *	46¡ of a circle centered about the viewer to span the width
 *	of a 640x480 pixel screen.  Lens specifications vary, but
 *	often include horizontal, vertical and diagonal field of
 *	view specifications.  This implementation considers only the
 *	horizontal specification.
 */
#define Lens15mm	Int2Fix( 105 )
#define Lens20mm	Int2Fix(  83 )
#define Lens30mm	Int2Fix(  62 )
#define Lens40mm	Int2Fix(  46 )
#define Lens50mm	Int2Fix(  40 )
#define Lens60mm	Int2Fix(  33 )
#define Lens70mm	Int2Fix(  29 )
#define Lens80mm	Int2Fix(  26 )
#define Lens90mm	Int2Fix(  23 )
#define Lens100mm	Int2Fix(  20 )
#define Lens150mm	Int2Fix(  15 )
#define Lens200mm	Int2Fix(  10 )
#define Lens500mm	Int2Fix(   4 )
#define Lens1000mm	Int2Fix(   2 )

#define AimCamera3d(fx,fy,fz,tx,ty,tz,vAngle)\
	{	Point3d	from,to;\
	\
		SetPt3d(&from,(fx), (fy),(fz));\
		SetPt3d(&to,(tx), (ty),(tz) );\
		AimCamera(from,to,(vAngle),0.000);\
	}

#if XVT_CC_PROTO
void AimCamera (Point3d, Point3d, Fixed, Fixed);
#else
void AimCamera ();
#endif

#endif