WlzRaster

Files
file	WlzRaster.c
	Functions to rasterize geometric Woolz objects into 2D or 3D domain objects.

Functions
WlzObject *	WlzRasterObj (WlzObject *gObj, WlzErrorNum *dstErr)
	Rasterizes the given geometric object, creating a new domain object. More...
void	WlzRasterLineSetItv2D (WlzIntervalDomain *iDom, WlzIVertex2 v0, WlzIVertex2 v1)
	Given an interval domain which has a single interval per line, which covers the line range of the two given vertices, this function updates the intervals by setting the left/right fields for a line drawn between the two given vertices. It may be used to set the intervals for any convex polygon simply by initialising the intervals to always false values (eg min = max of object and max = min of object) then calling this function for each ordered pair of boundary vertices. Both vertices must be relative to idom->(kol1,line1). More...

Detailed Description

Function Documentation

WlzRasterObj()

WlzObject* WlzRasterObj	(	WlzObject *	gObj,
		WlzErrorNum *	dstErr
	)

Rasterizes the given geometric object, creating a new domain object.

Returns

Woolz domain object, NULL on error.

Parameters

gObj	Given geometric object.
dstErr	Destination ptr for error code, may be NULL.

References _WlzDomain::core, _WlzObject::domain, _WlzObject::type, WLZ_CONTOUR, WLZ_EMPTY_OBJ, WLZ_ERR_DOMAIN_NULL, WLZ_ERR_NONE, WLZ_ERR_OBJECT_NULL, WlzBoundingBox3I(), and WlzMakeEmpty().

WlzRasterLineSetItv2D()

void WlzRasterLineSetItv2D	(	WlzIntervalDomain *	iDom,
		WlzIVertex2	v0,
		WlzIVertex2	v1
	)

Given an interval domain which has a single interval per line, which covers the line range of the two given vertices, this function updates the intervals by setting the left/right fields for a line drawn between the two given vertices. It may be used to set the intervals for any convex polygon simply by initialising the intervals to always false values (eg min = max of object and max = min of object) then calling this function for each ordered pair of boundary vertices. Both vertices must be relative to idom->(kol1,line1).

Parameters

iDom	Interval domain for which intervals are to be set.
v0	First vertex.
v1	Second vertex.

References _WlzInterval::ileft, _WlzIntervalDomain::intvlines, _WlzInterval::iright, _WlzIVertex2::vtX, and _WlzIVertex2::vtY.

Referenced by WlzMakeQuadrilateral().