IPoint Interface接口

Description

A Point is a zero-dimensional object that represents a specific (X, Y) location in a the two-dimensional XY-Plane.  A Point may also have Z, M, and ID attributes associated with it.  Existence of attributes does not alter the dimensionality of a Point nor does it alter geometric calculations performed on the Point.  Attributes are only considered for attribute calculations when the Point is ZAware, MAware, or PointIDAware.  Points may be constructed using PutCoords, individually setting the X and Y properties, or using the IConstructPoint interface.

Members

	All Properties Methods Inherited Non-inherited	Description
	Compare	Compares X, Y, M, Z, ID of this point (in that order) with that of the other point. Returns -1 if this point's value is less, 1 if greater, and 0 otherwise. Useful for sorting a group of points.
	ConstrainAngle	Projects this point to the point on the infinite line defined by anchor and angle (in radians). If allowOpposite is true, then the point can also snap to angle + pi radians.
	ConstrainDistance	Projects this point to the perimeter of the circle defined by radius and anchor.
	Dimension	The topological dimension of this geometry.
	Envelope	Creates a copy of this geometry's envelope and returns it.
	GeometryType	The type of this geometry.
	GeoNormalize	Shifts longitudes, if need be, into a continuous range of 360 degrees.
	GeoNormalizeFromLongitude	Normalizes longitudes into a continuous range containing the longitude. This method is obsolete.
	ID	The Point ID attribute.
	IsEmpty	Indicates whether this geometry contains any points.
	M	The measure attribute.
	Project	Projects this geometry into a new spatial reference.
	PutCoords	Sets the X and Y coordinates.
	QueryCoords	Returns the X and Y coordinates.
	QueryEnvelope	Copies this geometry's envelope properties into the specified envelope.
	SetEmpty	Removes all points from this geometry.
	SnapToSpatialReference	Moves points of this geometry so that they can be represented in the precision of the geometry's associated spatial reference system.
	SpatialReference	The spatial reference associated with this geometry.
	X	The X coordinate.
	Y	The Y coordinate.
	Z	The Z attribute.

Inherited Interfaces

Interfaces	Description
IGeometry	Provides access to members that describe properties and behavior of all geometric objects.

 

Classes that implement IPoint

Classes	Description
Point	A two dimensional point, optionally with measure, height, and ID attributes.