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Geometric Functions 3D

:Associate with "Geometric Functions (3D)" 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

: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.

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