ISnapElement

public interface ISnapElement

Base interface for all snapping elements. Implementors: snapping elements should be immutable as results may get cached.

Properties

SnapProjection Projection { get; }

Gets the type of projection for this element.

double Radius { get; }

Gets the radius within which this element is active.

bool Project(double x, double y, bool limitToRadius, out double xʹ, out double yʹ, out string description)

Project a coordinate pair onto this element.

Parameters:

x (double)	X coordinate to project.
y (double)	Y coordinate to project.
limitToRadius (bool)	If true, coordinates will not be projected if the projection distance would exceed the radius.
xʹ (out double)	Projected x coordinate. If the projection fails, xʹ will be equal to x.
yʹ (out double)	Projected y coordinate. If the projection fails, yʹ will be equal to y.
description (out string)	A meaningful descriptor may be returned here.

Returns: True if projection was successful.