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<title>GEOS: geos::operation::buffer::OffsetCurveBuilder Class Reference</title>
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<li><a class="el" href="classgeos_1_1operation_1_1buffer_1_1OffsetCurveBuilder.html">geos::operation::buffer::OffsetCurveBuilder</a> </li>
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<h1>geos::operation::buffer::OffsetCurveBuilder Class Reference</h1> </div>
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<p>Computes the raw offset curve for a single Geometry component (ring, line or point).
<a href="#_details">More...</a></p>
<p><code>#include <<a class="el" href="opBuffer_8h_source.html">geos/opBuffer.h</a>></code></p>
<p><a href="classgeos_1_1operation_1_1buffer_1_1OffsetCurveBuilder-members.html">List of all members.</a></p>
<table class="memberdecls">
<tr><td colspan="2"><h2><a name="pub-methods"></a>
Public Member Functions</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a0bf748068191e6c936cba1ce2adae408"></a><!-- doxytag: member="geos::operation::buffer::OffsetCurveBuilder::OffsetCurveBuilder" ref="a0bf748068191e6c936cba1ce2adae408" args="(const geom::PrecisionModel *newPrecisionModel, const BufferParameters &bufParams)" -->
</td><td class="memItemRight" valign="bottom"><b>OffsetCurveBuilder</b> (const <a class="el" href="classgeos_1_1geom_1_1PrecisionModel.html">geom::PrecisionModel</a> *newPrecisionModel, const <a class="el" href="classgeos_1_1operation_1_1buffer_1_1BufferParameters.html">BufferParameters</a> &bufParams)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1buffer_1_1OffsetCurveBuilder.html#a5e4cc3b46211b1b8f17e1fe41bdb7760">getLineCurve</a> (const <a class="el" href="classgeos_1_1geom_1_1CoordinateSequence.html">geom::CoordinateSequence</a> *inputPts, double distance, std::vector< <a class="el" href="classgeos_1_1geom_1_1CoordinateSequence.html">geom::CoordinateSequence</a> * > &lineList)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1buffer_1_1OffsetCurveBuilder.html#aaf73691f2640a2f530803690f9edf361">getSingleSidedLineCurve</a> (const <a class="el" href="classgeos_1_1geom_1_1CoordinateSequence.html">geom::CoordinateSequence</a> *inputPts, double distance, std::vector< <a class="el" href="classgeos_1_1geom_1_1CoordinateSequence.html">geom::CoordinateSequence</a> * > &lineList, bool leftSide, bool rightSide)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classgeos_1_1operation_1_1buffer_1_1OffsetCurveBuilder.html#a6e6b3d556509d004890a4b6e8bc2da8b">getRingCurve</a> (const <a class="el" href="classgeos_1_1geom_1_1CoordinateSequence.html">geom::CoordinateSequence</a> *inputPts, int side, double distance, std::vector< <a class="el" href="classgeos_1_1geom_1_1CoordinateSequence.html">geom::CoordinateSequence</a> * > &lineList)</td></tr>
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<hr/><a name="_details"></a><h2>Detailed Description</h2>
<p>Computes the raw offset curve for a single Geometry component (ring, line or point). </p>
<p>A raw offset curve line is not noded - it may contain self-intersections (and usually will). The final buffer polygon is computed by forming a topological graph of all the noded raw curves and tracing outside contours. The points in the raw curve are rounded to the required precision model.</p>
<p>Last port: operation/buffer/OffsetCurveBuilder.java rev. 1.9 </p>
<hr/><h2>Member Function Documentation</h2>
<a class="anchor" id="a5e4cc3b46211b1b8f17e1fe41bdb7760"></a><!-- doxytag: member="geos::operation::buffer::OffsetCurveBuilder::getLineCurve" ref="a5e4cc3b46211b1b8f17e1fe41bdb7760" args="(const geom::CoordinateSequence *inputPts, double distance, std::vector< geom::CoordinateSequence * > &lineList)" -->
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<td class="memname">void geos::operation::buffer::OffsetCurveBuilder::getLineCurve </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="classgeos_1_1geom_1_1CoordinateSequence.html">geom::CoordinateSequence</a> * </td>
<td class="paramname"> <em>inputPts</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">double </td>
<td class="paramname"> <em>distance</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">std::vector< <a class="el" href="classgeos_1_1geom_1_1CoordinateSequence.html">geom::CoordinateSequence</a> * > & </td>
<td class="paramname"> <em>lineList</em></td><td> </td>
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<td></td>
<td>)</td>
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<p>This method handles single points as well as lines. Lines are assumed to <b>not</b> be closed (the function will not fail for closed lines, but will generate superfluous line caps).</p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>lineList</em> </td><td>the std::vector to which the newly created CoordinateSequences will be pushed_back. Caller is responsible to delete these new elements. </td></tr>
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<a class="anchor" id="a6e6b3d556509d004890a4b6e8bc2da8b"></a><!-- doxytag: member="geos::operation::buffer::OffsetCurveBuilder::getRingCurve" ref="a6e6b3d556509d004890a4b6e8bc2da8b" args="(const geom::CoordinateSequence *inputPts, int side, double distance, std::vector< geom::CoordinateSequence * > &lineList)" -->
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<td class="memname">void geos::operation::buffer::OffsetCurveBuilder::getRingCurve </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="classgeos_1_1geom_1_1CoordinateSequence.html">geom::CoordinateSequence</a> * </td>
<td class="paramname"> <em>inputPts</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"> <em>side</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">double </td>
<td class="paramname"> <em>distance</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">std::vector< <a class="el" href="classgeos_1_1geom_1_1CoordinateSequence.html">geom::CoordinateSequence</a> * > & </td>
<td class="paramname"> <em>lineList</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
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<p>This method handles the degenerate cases of single points and lines, as well as rings.</p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>lineList</em> </td><td>the std::vector to which CoordinateSequences will be pushed_back </td></tr>
</table>
</dd>
</dl>
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<a class="anchor" id="aaf73691f2640a2f530803690f9edf361"></a><!-- doxytag: member="geos::operation::buffer::OffsetCurveBuilder::getSingleSidedLineCurve" ref="aaf73691f2640a2f530803690f9edf361" args="(const geom::CoordinateSequence *inputPts, double distance, std::vector< geom::CoordinateSequence * > &lineList, bool leftSide, bool rightSide)" -->
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<td class="memname">void geos::operation::buffer::OffsetCurveBuilder::getSingleSidedLineCurve </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="classgeos_1_1geom_1_1CoordinateSequence.html">geom::CoordinateSequence</a> * </td>
<td class="paramname"> <em>inputPts</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">double </td>
<td class="paramname"> <em>distance</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">std::vector< <a class="el" href="classgeos_1_1geom_1_1CoordinateSequence.html">geom::CoordinateSequence</a> * > & </td>
<td class="paramname"> <em>lineList</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">bool </td>
<td class="paramname"> <em>leftSide</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">bool </td>
<td class="paramname"> <em>rightSide</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
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<div class="memdoc">
<p>This method handles single points as well as lines.</p>
<p>Lines are assumed to <b>not</b> be closed (the function will not fail for closed lines, but will generate superfluous line caps).</p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>lineList</em> </td><td>the std::vector to which newly created CoordinateSequences will be pushed_back. Caller will be responsible to delete them. </td></tr>
<tr><td valign="top"></td><td valign="top"><em>leftSide</em> </td><td>indicates that the left side buffer will be obtained/skipped </td></tr>
<tr><td valign="top"></td><td valign="top"><em>rightSide</em> </td><td>indicates that the right side buffer will be obtained/skipped</td></tr>
</table>
</dd>
</dl>
<p>NOTE: this is a GEOS extension </p>
</div>
</div>
<hr/>The documentation for this class was generated from the following file:<ul>
<li><a class="el" href="OffsetCurveBuilder_8h_source.html">OffsetCurveBuilder.h</a></li>
</ul>
</div>
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