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clip3d_f(3)			Allegro	manual			   clip3d_f(3)

NAME
       clip3d_f	 -  Clips  the polygon given in	vtx using floating point math,
       Allegro game programming	library.

SYNOPSIS
       #include	<allegro.h>

       int clip3d_f(int	type, float min_z, float max_z,	int  vc,  const	 V3D_f
       *vtx[], V3D_f *vout[], V3D_f *vtmp[], int out[]);

DESCRIPTION
       Clips  the  polygon given in `vtx'. The number of vertices is `vc', the
       result goes in `vout', and `vtmp' and `out'  are	 needed	 for  internal
       purposes.  The pointers in `vtx', `vout'	and `vtmp' must	point to valid
       V3D_f structures.

       As additional vertices may appear in the	process	of  clipping,  so  the
       size  of	 `vout',  `vtmp'  and `out' should be at least vc * (1.5 ^ n),
       where `n' is the	number of clipping planes (5 or	6),  and  `^'  denotes
       "to the power of".

       The   frustum   (viewing	  volume)   is	 defined  by  -z<x<z,  -z<y<z,
       0<min_z<z<max_z.	If  max_z<=min_z, the z<max_z clipping is not done. As
       you  can	see, clipping is done in the camera space, with	perspective in
       mind, so	this routine should be called after you	apply the  camera  ma-
       trix, but before	the perspective	projection. The	routine	will correctly
       interpolate u, v, and c in the vertex structure.	However, no  provision
       is made for high/truecolor GCOL.

RETURN VALUE
       Returns the number of vertices after clipping is	done.

SEE ALSO
       polygon3d(3), clip3d(3),	excamera(3), exscn3d(3)

Allegro				 version 4.4.2			   clip3d_f(3)

NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | SEE ALSO

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