Geometric Functions 3D

Function prototypes. More...

Functions
void	Clip3DCompOutCodes (INT32 numpoints, DPOINT3D *point, UINT8 *outcode, double zmin, UINT32 flags)
int	Clip3DFlatPolygon (DPOINT3D *ipoint, UINT8 *outcode, INT32 numIPoints, DPOINT3D *opoint, double ViewPlaneDist, UINT32 flags)
int	Clip3DLine (DPOINT3D *p0, DPOINT3D *p1, double zmin, UINT32 flags)
int	Clip3DLineParallel (DPOINT3D *p0, DPOINT3D *p1, UINT32 flags)
int	Clip3DLinePerspective (DPOINT3D *p0, DPOINT3D *p1, double zmin, UINT32 flags)
int	Clip3DTriangle (DPOINT3D **tp, UINT8 *outcode, DPOINT3D *opoint, double ViewPlaneDist, UINT32 flags)

---

Detailed Description

Function prototypes.

:Associate with "Geometric Functions (3D)"

---

Function Documentation

void Clip3DCompOutCodes	(	INT32	numpoints,
		DPOINT3D *	point,
		UINT8 *	outcode,
		double	zmin,
		UINT32	flags
	)

Compute Cohen-Sutherland "out-codes" used in clipping.

int Clip3DFlatPolygon	(	DPOINT3D *	ipoint,
		UINT8 *	outcode,
		INT32	numIPoints,
		DPOINT3D *	opoint,
		double	ViewPlaneDist,
		UINT32	flags
	)

Clip flat polygon to canonical view volume.

Returns:

Number of boundary points, 0 if outside view volume.

Parameters:

opoint

Boundary points returned.(Should be twice more than numIPoints)

int Clip3DLine	(	DPOINT3D *	p0,
		DPOINT3D *	p1,
		double	zmin,
		UINT32	flags
	)

Clip line against canonical view volume.

Parameters:

	p0	Line starting point passed/returned.
	p1	Line ending point passed/returned.

int Clip3DLineParallel	(	DPOINT3D *	p0,
		DPOINT3D *	p1,
		UINT32	flags
	)

Clip line against canonical parallel-projection view volume.

Returns:

1 if line accepted (and clipped).

Parameters:

	p0	Line starting point passed/returned
	p1	Line ending point passed/returned

int Clip3DLinePerspective	(	DPOINT3D *	p0,
		DPOINT3D *	p1,
		double	zmin,
		UINT32	flags
	)

Clip line against canonical perspective-projection view volume.

Returns:

1 if line accepted (and clipped).

Parameters:

	p0	Line starting point passed/returned.
	p1	Line ending point passed/returned.

int Clip3DTriangle	(	DPOINT3D **	tp,
		UINT8 *	outcode,
		DPOINT3D *	opoint,
		double	ViewPlaneDist,
		UINT32	flags
	)

Clip triangle to canonical view volume.

Returns:

Number of boundary points, 0 if outside view volume.

Parameters:

opoint

Boundary points returned.