org.opengis.spatialschema.geometry.geometry

Interface LineSegment

All Superinterfaces:

CurveSegment, GenericCurve, LineString

@UML(identifier="GM_LineSegment",
     specification=ISO_19107)
public interface LineSegment
extends LineString

Two distinct direct positions (the start point and end point) joined by a straight line. Thus its interpolation attribute shall be LINEAR. The default parameterization is:

 L = endParam - startParam
 c(s) = ControlPoint[1]+((s-startParam)/L)*(ControlPoint[2]-ControlPoint[1])
 

Any other point in the control point array must fall on this line. The control points of a LineSegment shall all lie on the straight line between its start point and end point. Between these two points, other positions may be interpolated linearly. The linear interpolation, given using a constructive parameter t, 0 ? t ? 1.0, where c(o) = c.startPoint and c(1)=c.endPoint, is:

c(t) = c(0)(1-t) + c(1)t

Since:

GeoAPI 1.0

See Also:

GeometryFactory.createLineSegment(org.opengis.spatialschema.geometry.geometry.Position, org.opengis.spatialschema.geometry.geometry.Position)

Method Summary

Methods inherited from interface org.opengis.spatialschema.geometry.geometry.LineString

asLineSegments, getControlPoints

Methods inherited from interface org.opengis.spatialschema.geometry.primitive.CurveSegment

getBoundary, getCurve, getInterpolation, getNumDerivativesAtEnd, getNumDerivativesAtStart, getNumDerivativesInterior, getSamplePoints, reverse

Methods inherited from interface org.opengis.spatialschema.geometry.geometry.GenericCurve

asLineString, forConstructiveParam, forParam, getEndConstructiveParam, getEndParam, getEndPoint, getParamForPoint, getStartConstructiveParam, getStartParam, getStartPoint, getTangent, length, length