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14 <div id=Content><div class="CClass"><div class=CTopic id=MainTopic><h1 class=CTitle><a name="OpenLayers.Geometry.LineString"></a>OpenLayers.<wbr>Geometry.<wbr>LineString</h1><div class=CBody><p>A LineString is a Curve which, once two points have been added to it, can never be less than two points long.</p><h4 class=CHeading>Inherits from</h4><ul><li><a href="Curve-js.html#OpenLayers.Geometry.Curve" class=LClass id=link9 onMouseOver="ShowTip(event, 'tt9', 'link9')" onMouseOut="HideTip('tt9')">OpenLayers.Geometry.Curve</a></li></ul><!--START_ND_SUMMARY--><div class=Summary><div class=STitle>Summary</div><div class=SBorder><table border=0 cellspacing=0 cellpadding=0 class=STable><tr class="SMain"><td class=SEntry><a href="#OpenLayers.Geometry.LineString" >OpenLayers.<wbr>Geometry.<wbr>LineString</a></td><td class=SDescription>A LineString is a Curve which, once two points have been added to it, can never be less than two points long.</td></tr><tr class="SGroup SIndent1"><td class=SEntry><a href="#OpenLayers.Geometry.LineString.Constructor" >Constructor</a></td><td class=SDescription></td></tr><tr class="SConstructor SIndent2 SMarked"><td class=SEntry><a href="#OpenLayers.Geometry.LineString.OpenLayers.Geometry.LineString" >OpenLayers.<wbr>Geometry.<wbr>LineString</a></td><td class=SDescription>Create a new LineString geometry</td></tr><tr class="SGroup SIndent1"><td class=SEntry><a href="#OpenLayers.Geometry.LineString.Functions" >Functions</a></td><td class=SDescription></td></tr><tr class="SFunction SIndent2 SMarked"><td class=SEntry><a href="#OpenLayers.Geometry.LineString.removeComponent" id=link1 onMouseOver="ShowTip(event, 'tt1', 'link1')" onMouseOut="HideTip('tt1')">removeComponent</a></td><td class=SDescription>Only allows removal of a point if there are three or more points in the linestring. </td></tr><tr class="SFunction SIndent2"><td class=SEntry><a href="#OpenLayers.Geometry.LineString.intersects" id=link2 onMouseOver="ShowTip(event, 'tt2', 'link2')" onMouseOut="HideTip('tt2')">intersects</a></td><td class=SDescription>Test for instersection between two geometries. </td></tr><tr class="SFunction SIndent2 SMarked"><td class=SEntry><a href="#OpenLayers.Geometry.LineString.getSortedSegments" id=link3 onMouseOver="ShowTip(event, 'tt3', 'link3')" onMouseOut="HideTip('tt3')">getSortedSegments</a></td><td class=SDescription>{Array} An array of segment objects. </td></tr><tr class="SFunction SIndent2"><td class=SEntry><a href="#OpenLayers.Geometry.LineString.splitWithSegment" id=link4 onMouseOver="ShowTip(event, 'tt4', 'link4')" onMouseOut="HideTip('tt4')">splitWithSegment</a></td><td class=SDescription>Split this geometry with the given segment.</td></tr><tr class="SFunction SIndent2 SMarked"><td class=SEntry><a href="#OpenLayers.Geometry.LineString.split" id=link5 onMouseOver="ShowTip(event, 'tt5', 'link5')" onMouseOut="HideTip('tt5')">split</a></td><td class=SDescription>Use this geometry (the source) to attempt to split a target geometry.</td></tr><tr class="SFunction SIndent2"><td class=SEntry><a href="#OpenLayers.Geometry.LineString.splitWith" id=link6 onMouseOver="ShowTip(event, 'tt6', 'link6')" onMouseOut="HideTip('tt6')">splitWith</a></td><td class=SDescription>Split this geometry (the target) with the given geometry (the source).</td></tr><tr class="SFunction SIndent2 SMarked"><td class=SEntry><a href="#OpenLayers.Geometry.LineString.getVertices" id=link7 onMouseOver="ShowTip(event, 'tt7', 'link7')" onMouseOut="HideTip('tt7')">getVertices</a></td><td class=SDescription>Return a list of all points in this geometry.</td></tr><tr class="SFunction SIndent2"><td class=SEntry><a href="#OpenLayers.Geometry.LineString.distanceTo" id=link8 onMouseOver="ShowTip(event, 'tt8', 'link8')" onMouseOut="HideTip('tt8')">distanceTo</a></td><td class=SDescription>Calculate the closest distance between two geometries (on the x-y plane).</td></tr></table></div></div><!--END_ND_SUMMARY--></div></div></div>
16 <div class="CGroup"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Geometry.LineString.Constructor"></a>Constructor</h3></div></div>
18 <div class="CConstructor"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Geometry.LineString.OpenLayers.Geometry.LineString"></a>OpenLayers.<wbr>Geometry.<wbr>LineString</h3><div class=CBody><p>Create a new LineString geometry</p><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>points</td><td class=CDLDescription>{Array(<a href="Point-js.html#OpenLayers.Geometry.Point" class=LClass id=link10 onMouseOver="ShowTip(event, 'tt10', 'link10')" onMouseOut="HideTip('tt10')">OpenLayers.Geometry.Point</a>)} An array of points used to generate the linestring</td></tr></table></div></div></div>
20 <div class="CGroup"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Geometry.LineString.Functions"></a>Functions</h3></div></div>
22 <div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Geometry.LineString.removeComponent"></a>removeComponent</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class=Prototype><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class=PBeforeParameters nowrap>removeComponent: function(</td><td class=PParameter nowrap>point</td><td class=PAfterParameters nowrap>)</td></tr></table></td></tr></table></blockquote><p>Only allows removal of a point if there are three or more points in the linestring. (otherwise the result would be just a single point)</p><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>point</td><td class=CDLDescription>{<a href="Point-js.html#OpenLayers.Geometry.Point" class=LClass id=link11 onMouseOver="ShowTip(event, 'tt10', 'link11')" onMouseOut="HideTip('tt10')">OpenLayers.Geometry.Point</a>} The point to be removed</td></tr></table></div></div></div>
24 <div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Geometry.LineString.intersects"></a>intersects</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class=Prototype><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class=PBeforeParameters nowrap>intersects: function(</td><td class=PParameter nowrap>geometry</td><td class=PAfterParameters nowrap>)</td></tr></table></td></tr></table></blockquote><p>Test for instersection between two geometries. This is a cheapo implementation of the Bently-Ottmann algorigithm. It doesn’t really keep track of a sweep line data structure. It is closer to the brute force method, except that segments are sorted and potential intersections are only calculated when bounding boxes intersect.</p><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>geometry</td><td class=CDLDescription>{<a href="../Geometry-js.html#OpenLayers.Geometry" class=LClass id=link12 onMouseOver="ShowTip(event, 'tt11', 'link12')" onMouseOut="HideTip('tt11')">OpenLayers.Geometry</a>}</td></tr></table><h4 class=CHeading>Returns</h4><p>{Boolean} The input geometry intersects this geometry.</p></div></div></div>
26 <div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Geometry.LineString.getSortedSegments"></a>getSortedSegments</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class=Prototype><tr><td>getSortedSegments: function()</td></tr></table></blockquote><h4 class=CHeading>Returns</h4><p>{Array} An array of segment objects. Segment objects have properties x1, y1, x2, and y2. The start point is represented by x1 and y1. The end point is represented by x2 and y2. Start and end are ordered so that x1 < x2.</p></div></div></div>
28 <div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Geometry.LineString.splitWithSegment"></a>splitWithSegment</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class=Prototype><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class=PBeforeParameters nowrap>splitWithSegment: function(</td><td class=PParameter nowrap>seg,</td></tr><tr><td></td><td class=PParameter nowrap>options</td><td class=PAfterParameters nowrap>)</td></tr></table></td></tr></table></blockquote><p>Split this geometry with the given segment.</p><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>seg</td><td class=CDLDescription>{Object} An object with x1, y1, x2, and y2 properties referencing segment endpoint coordinates.</td></tr><tr><td class=CDLEntry>options</td><td class=CDLDescription>{Object} Properties of this object will be used to determine how the split is conducted.</td></tr></table><h4 class=CHeading>Valid options</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>edge</td><td class=CDLDescription>{Boolean} Allow splitting when only edges intersect. Default is true. If false, a vertex on the source segment must be within the tolerance distance of the intersection to be considered a split.</td></tr><tr><td class=CDLEntry>tolerance</td><td class=CDLDescription>{Number} If a non-null value is provided, intersections within the tolerance distance of one of the source segment’s endpoints will be assumed to occur at the endpoint.</td></tr></table><h4 class=CHeading>Returns</h4><p>{Object} An object with <b>lines</b> and <b>points</b> properties. If the given segment intersects this linestring, the lines array will reference geometries that result from the split. The points array will contain all intersection points. Intersection points are sorted along the segment (in order from x1,y1 to x2,y2).</p></div></div></div>
30 <div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Geometry.LineString.split"></a>split</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class=Prototype><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class=PBeforeParameters nowrap>split: function(</td><td class=PParameter nowrap>target,</td></tr><tr><td></td><td class=PParameter nowrap>options</td><td class=PAfterParameters nowrap>)</td></tr></table></td></tr></table></blockquote><p>Use this geometry (the source) to attempt to split a target geometry.</p><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>target</td><td class=CDLDescription>{<a href="../Geometry-js.html#OpenLayers.Geometry" class=LClass id=link13 onMouseOver="ShowTip(event, 'tt11', 'link13')" onMouseOut="HideTip('tt11')">OpenLayers.Geometry</a>} The target geometry.</td></tr><tr><td class=CDLEntry>options</td><td class=CDLDescription>{Object} Properties of this object will be used to determine how the split is conducted.</td></tr></table><h4 class=CHeading>Valid options</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>mutual</td><td class=CDLDescription>{Boolean} Split the source geometry in addition to the target geometry. Default is false.</td></tr><tr><td class=CDLEntry>edge</td><td class=CDLDescription>{Boolean} Allow splitting when only edges intersect. Default is true. If false, a vertex on the source must be within the tolerance distance of the intersection to be considered a split.</td></tr><tr><td class=CDLEntry>tolerance</td><td class=CDLDescription>{Number} If a non-null value is provided, intersections within the tolerance distance of an existing vertex on the source will be assumed to occur at the vertex.</td></tr></table><h4 class=CHeading>Returns</h4><p>{Array} A list of geometries (of this same type as the target) that result from splitting the target with the source geometry. The source and target geometry will remain unmodified. If no split results, null will be returned. If mutual is true and a split results, return will be an array of two arrays - the first will be all geometries that result from splitting the source geometry and the second will be all geometries that result from splitting the target geometry.</p></div></div></div>
32 <div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Geometry.LineString.splitWith"></a>splitWith</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class=Prototype><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class=PBeforeParameters nowrap>splitWith: function(</td><td class=PParameter nowrap>geometry,</td></tr><tr><td></td><td class=PParameter nowrap>options</td><td class=PAfterParameters nowrap>)</td></tr></table></td></tr></table></blockquote><p>Split this geometry (the target) with the given geometry (the source).</p><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>geometry</td><td class=CDLDescription>{<a href="../Geometry-js.html#OpenLayers.Geometry" class=LClass id=link14 onMouseOver="ShowTip(event, 'tt11', 'link14')" onMouseOut="HideTip('tt11')">OpenLayers.Geometry</a>} A geometry used to split this geometry (the source).</td></tr><tr><td class=CDLEntry>options</td><td class=CDLDescription>{Object} Properties of this object will be used to determine how the split is conducted.</td></tr></table><h4 class=CHeading>Valid options</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>mutual</td><td class=CDLDescription>{Boolean} Split the source geometry in addition to the target geometry. Default is false.</td></tr><tr><td class=CDLEntry>edge</td><td class=CDLDescription>{Boolean} Allow splitting when only edges intersect. Default is true. If false, a vertex on the source must be within the tolerance distance of the intersection to be considered a split.</td></tr><tr><td class=CDLEntry>tolerance</td><td class=CDLDescription>{Number} If a non-null value is provided, intersections within the tolerance distance of an existing vertex on the source will be assumed to occur at the vertex.</td></tr></table><h4 class=CHeading>Returns</h4><p>{Array} A list of geometries (of this same type as the target) that result from splitting the target with the source geometry. The source and target geometry will remain unmodified. If no split results, null will be returned. If mutual is true and a split results, return will be an array of two arrays - the first will be all geometries that result from splitting the source geometry and the second will be all geometries that result from splitting the target geometry.</p></div></div></div>
34 <div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Geometry.LineString.getVertices"></a>getVertices</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class=Prototype><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class=PBeforeParameters nowrap>getVertices: function(</td><td class=PParameter nowrap>nodes</td><td class=PAfterParameters nowrap>)</td></tr></table></td></tr></table></blockquote><p>Return a list of all points in this geometry.</p><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>nodes</td><td class=CDLDescription>{Boolean} For lines, only return vertices that are endpoints. If false, for lines, only vertices that are not endpoints will be returned. If not provided, all vertices will be returned.</td></tr></table><h4 class=CHeading>Returns</h4><p>{Array} A list of all vertices in the geometry.</p></div></div></div>
36 <div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Geometry.LineString.distanceTo"></a>distanceTo</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class=Prototype><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class=PBeforeParameters nowrap>distanceTo: function(</td><td class=PParameter nowrap>geometry,</td></tr><tr><td></td><td class=PParameter nowrap>options</td><td class=PAfterParameters nowrap>)</td></tr></table></td></tr></table></blockquote><p>Calculate the closest distance between two geometries (on the x-y plane).</p><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>geometry</td><td class=CDLDescription>{<a href="../Geometry-js.html#OpenLayers.Geometry" class=LClass id=link15 onMouseOver="ShowTip(event, 'tt11', 'link15')" onMouseOut="HideTip('tt11')">OpenLayers.Geometry</a>} The target geometry.</td></tr><tr><td class=CDLEntry>options</td><td class=CDLDescription>{Object} Optional properties for configuring the distance calculation.</td></tr></table><h4 class=CHeading>Valid options</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>details</td><td class=CDLDescription>{Boolean} Return details from the distance calculation. Default is false.</td></tr><tr><td class=CDLEntry>edge</td><td class=CDLDescription>{Boolean} Calculate the distance from this geometry to the nearest edge of the target geometry. Default is true. If true, calling distanceTo from a geometry that is wholly contained within the target will result in a non-zero distance. If false, whenever geometries intersect, calling distanceTo will return 0. If false, details cannot be returned.</td></tr></table><h4 class=CHeading>Returns</h4><p>{Number | Object} The distance between this geometry and the target. If details is true, the return will be an object with distance, x0, y0, x1, and x2 properties. The x0 and y0 properties represent the coordinates of the closest point on this geometry. The x1 and y1 properties represent the coordinates of the closest point on the target geometry.</p></div></div></div>
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52 <div class=CToolTip id="tt1"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class=Prototype><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class=PBeforeParameters nowrap>removeComponent: function(</td><td class=PParameter nowrap>point</td><td class=PAfterParameters nowrap>)</td></tr></table></td></tr></table></blockquote>Only allows removal of a point if there are three or more points in the linestring. </div></div><div class=CToolTip id="tt2"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class=Prototype><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class=PBeforeParameters nowrap>intersects: function(</td><td class=PParameter nowrap>geometry</td><td class=PAfterParameters nowrap>)</td></tr></table></td></tr></table></blockquote>Test for instersection between two geometries. </div></div><div class=CToolTip id="tt3"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class=Prototype><tr><td>getSortedSegments: function()</td></tr></table></blockquote>{Array} An array of segment objects. </div></div><div class=CToolTip id="tt4"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class=Prototype><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class=PBeforeParameters nowrap>splitWithSegment: function(</td><td class=PParameter nowrap>seg,</td></tr><tr><td></td><td class=PParameter nowrap>options</td><td class=PAfterParameters nowrap>)</td></tr></table></td></tr></table></blockquote>Split this geometry with the given segment.</div></div><div class=CToolTip id="tt5"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class=Prototype><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class=PBeforeParameters nowrap>split: function(</td><td class=PParameter nowrap>target,</td></tr><tr><td></td><td class=PParameter nowrap>options</td><td class=PAfterParameters nowrap>)</td></tr></table></td></tr></table></blockquote>Use this geometry (the source) to attempt to split a target geometry.</div></div><div class=CToolTip id="tt6"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class=Prototype><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class=PBeforeParameters nowrap>splitWith: function(</td><td class=PParameter nowrap>geometry,</td></tr><tr><td></td><td class=PParameter nowrap>options</td><td class=PAfterParameters nowrap>)</td></tr></table></td></tr></table></blockquote>Split this geometry (the target) with the given geometry (the source).</div></div><div class=CToolTip id="tt7"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class=Prototype><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class=PBeforeParameters nowrap>getVertices: function(</td><td class=PParameter nowrap>nodes</td><td class=PAfterParameters nowrap>)</td></tr></table></td></tr></table></blockquote>Return a list of all points in this geometry.</div></div><div class=CToolTip id="tt8"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class=Prototype><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class=PBeforeParameters nowrap>distanceTo: function(</td><td class=PParameter nowrap>geometry,</td></tr><tr><td></td><td class=PParameter nowrap>options</td><td class=PAfterParameters nowrap>)</td></tr></table></td></tr></table></blockquote>Calculate the closest distance between two geometries (on the x-y plane).</div></div><div class=CToolTip id="tt9"><div class=CClass>A Curve is a MultiPoint, whose points are assumed to be connected. </div></div><div class=CToolTip id="tt10"><div class=CClass>Point geometry class.</div></div><div class=CToolTip id="tt11"><div class=CClass>A Geometry is a description of a geographic object. </div></div><!--END_ND_TOOLTIPS-->
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