ftp.nice.ch/pub/next/graphics/3d/geomview.1.4.1.s.tar.gz#/Geomview/src/lib/gprim/discgrp/projective.h

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#ifndef _projective_
#define _projective_

#ifndef _proj_matrix_
#define _proj_matrix_

typedef double proj_matrix[4][4];
typedef double point[4];

#endif

#if PROTOTYPES
/* in sl2c_to_proj.c */
extern void		sl2c_to_proj(sl2c_matrix, proj_matrix);
extern void		proj_to_sl2c(proj_matrix, sl2c_matrix);
extern void		proj_mult(proj_matrix, proj_matrix, proj_matrix);
extern void		proj_copy(proj_matrix, proj_matrix);
extern void		proj_invert(proj_matrix, proj_matrix);
#endif

#endif

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