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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><!--NewPage--><HTML><HEAD><!-- Generated by javadoc (build 1.4.2_13) on Tue Jun 05 11:36:17 GMT-05:00 2007 --><META http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><TITLE>Line (Geotools 2.3.x 2.3.2 API)</TITLE><META NAME="keywords" CONTENT="org.geotools.math.Line class"><META NAME="keywords" CONTENT="setLine()"><META NAME="keywords" CONTENT="translate()"><META NAME="keywords" CONTENT="y()"><META NAME="keywords" CONTENT="x()"><META NAME="keywords" CONTENT="getY0()"><META NAME="keywords" CONTENT="getX0()"><META NAME="keywords" CONTENT="getSlope()"><META NAME="keywords" CONTENT="intersectionPoint()"><META NAME="keywords" CONTENT="nearestColinearPoint()"><META NAME="keywords" CONTENT="isoscelesTriangleBase()"><META NAME="keywords" CONTENT="toString()"><META NAME="keywords" CONTENT="equals()"><META NAME="keywords" CONTENT="hashCode()"><META NAME="keywords" CONTENT="clone()"><LINK REL ="stylesheet" TYPE="text/css" HREF="../../../stylesheet.css" TITLE="Style"><SCRIPT type="text/javascript">function windowTitle(){ parent.document.title="Line (Geotools 2.3.x 2.3.2 API)";}</SCRIPT></HEAD><BODY BGCOLOR="white" onload="windowTitle();"><!-- ========= START OF TOP NAVBAR ======= --><A NAME="navbar_top"><!-- --></A><A HREF="#skip-navbar_top" title="Skip navigation links"></A><TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0" SUMMARY=""><TR><TD COLSPAN=3 BGCOLOR="#EEEEFF" CLASS="NavBarCell1"><A NAME="navbar_top_firstrow"><!-- --></A><TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3" SUMMARY=""> <TR ALIGN="center" VALIGN="top"> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../overview-summary.html"><FONT CLASS="NavBarFont1"><B>Overview</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-summary.html"><FONT CLASS="NavBarFont1"><B>Package</B></FONT></A> </TD> <TD BGCOLOR="#FFFFFF" CLASS="NavBarCell1Rev"> <FONT CLASS="NavBarFont1Rev"><B>Class</B></FONT> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="class-use/Line.html"><FONT CLASS="NavBarFont1"><B>Use</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-tree.html"><FONT CLASS="NavBarFont1"><B>Tree</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../deprecated-list.html"><FONT CLASS="NavBarFont1"><B>Deprecated</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../index-all.html"><FONT CLASS="NavBarFont1"><B>Index</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../help-doc.html"><FONT CLASS="NavBarFont1"><B>Help</B></FONT></A> </TD> </TR></TABLE></TD><TD ALIGN="right" VALIGN="top" ROWSPAN=3><EM></EM></TD></TR><TR><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../org/geotools/math/Complex.html" title="class in org.geotools.math"><B>PREV CLASS</B></A> <A HREF="../../../org/geotools/math/Plane.html" title="class in org.geotools.math"><B>NEXT CLASS</B></A></FONT></TD><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../index.html" target="_top"><B>FRAMES</B></A> <A HREF="Line.html" target="_top"><B>NO FRAMES</B></A> <SCRIPT type="text/javascript"> <!-- if(window==top) { document.writeln('<A HREF="../../../allclasses-noframe.html"><B>All Classes</B></A>'); } //--></SCRIPT><NOSCRIPT> <A HREF="../../../allclasses-noframe.html"><B>All Classes</B></A></NOSCRIPT></FONT></TD></TR><TR><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> SUMMARY: NESTED | FIELD | <A HREF="#constructor_summary">CONSTR</A> | <A HREF="#method_summary">METHOD</A></FONT></TD><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2">DETAIL: FIELD | <A HREF="#constructor_detail">CONSTR</A> | <A HREF="#method_detail">METHOD</A></FONT></TD></TR></TABLE><A NAME="skip-navbar_top"></A><!-- ========= END OF TOP NAVBAR ========= --><HR><!-- ======== START OF CLASS DATA ======== --><H2><FONT SIZE="-1">org.geotools.math</FONT><BR>Class Line</H2><PRE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A> <IMG SRC="../../../resources/inherit.gif" ALT="extended by"><B>Line</B></PRE><DL><DT><B>All Implemented Interfaces:</B> <DD>Cloneable, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Cloneable.html" title="class or interface in java.lang">Cloneable</A>, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/Serializable.html" title="class or interface in java.io">Serializable</A></DD></DL><HR><DL><DT>public class <B>Line</B><DT>extends <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A><DT>implements Cloneable, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/Serializable.html" title="class or interface in java.io">Serializable</A></DL><P>Equation of a line in a two dimensional space (<var>x</var>,<var>y</var>). A line has an equation of the form <var>y</var>=<var>a</var><var>x</var>+<var>b</var>. At the difference of <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/awt/geom/Line2D.html" title="class or interface in java.awt.geom"><CODE>Line2D</CODE></A> (which are bounded by (<var>x1</var>,<var>y1</var>) and (<var>x2</var>,<var>y2</var>) points), objects extends toward infinity. The equation parameters for a object can bet set at construction time or using one of the methods. The <var>y</var> value can be computed for a given <var>x</var> value using the <A HREF="../../../org/geotools/math/Line.html#y(double)"><CODE>y(double)</CODE></A> method. Method <A HREF="../../../org/geotools/math/Line.html#x(double)"><CODE>x(double)</CODE></A> compute the converse and should work even if the line is vertical.<P><P><DL><DT><B>Since:</B></DT> <DD>2.0</DD><DT><B>Author:</B></DT> <DD>Martin Desruisseaux</DD><DT><B>See Also:</B><DD><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/awt/geom/Point2D.html" title="class or interface in java.awt.geom"><CODE>Point2D</CODE></A>, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/awt/geom/Line2D.html" title="class or interface in java.awt.geom"><CODE>Line2D</CODE></A>, <A HREF="../../../org/geotools/math/Plane.html" title="class in org.geotools.math"><CODE>Plane</CODE></A>, <A HREF="../../../serialized-form.html#org.geotools.math.Line">Serialized Form</A><DT><B>Module:</B></DT><DD><CODE><B>module/referencing</B></CODE> (<A HREF="http://maven.geotools.fr/repository/org/geotools/gt2-referencing/"><CODE>gt2-referencing.jar</CODE></A>) (<A HREF="http://maven.geotools.fr/reports/referencing/index.html">Maven report</A>) (<A HREF="http://svn.geotools.org/geotools/tags/2.3.2/module/referencing/src/org/geotools/math/Line.java">SVN head</A>)</DD></DL><HR><P><!-- ======== NESTED CLASS SUMMARY ======== --><!-- =========== FIELD SUMMARY =========== --><!-- ======== CONSTRUCTOR SUMMARY ======== --><A NAME="constructor_summary"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=2><FONT SIZE="+2"><B>Constructor Summary</B></FONT></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><B><A HREF="../../../org/geotools/math/Line.html#Line()">Line</A></B>()</CODE><BR> Construct an initially unitialized line. </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><B><A HREF="../../../org/geotools/math/Line.html#Line(double, double)">Line</A></B>(double slope, double y0)</CODE><BR> Construct a line with the specified slope and offset. </TD></TR></TABLE> <!-- ========== METHOD SUMMARY =========== --><A NAME="method_summary"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=2><FONT SIZE="+2"><B>Method Summary</B></FONT></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../org/geotools/math/Line.html#clone()">clone</A></B>()</CODE><BR> Returns a clone of this line.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> boolean</CODE></FONT></TD><TD><CODE><B><A HREF="../../../org/geotools/math/Line.html#equals(java.lang.Object)">equals</A></B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A> object)</CODE><BR> Compare this object with the specified one for equality.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> double</CODE></FONT></TD><TD><CODE><B><A HREF="../../../org/geotools/math/Line.html#getSlope()">getSlope</A></B>()</CODE><BR> Returns the slope.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> double</CODE></FONT></TD><TD><CODE><B><A HREF="../../../org/geotools/math/Line.html#getX0()">getX0</A></B>()</CODE><BR> Returns the <var>x</var> value for <var>y</var>==0. </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> double</CODE></FONT></TD><TD><CODE><B><A HREF="../../../org/geotools/math/Line.html#getY0()">getY0</A></B>()</CODE><BR> Returns the <var>y</var> value for <var>x</var>==0. </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> int</CODE></FONT></TD><TD><CODE><B><A HREF="../../../org/geotools/math/Line.html#hashCode()">hashCode</A></B>()</CODE><BR> Returns a hash code value for this line.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/awt/geom/Point2D.html" title="class or interface in java.awt.geom">Point2D</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../org/geotools/math/Line.html#intersectionPoint(org.geotools.math.Line)">intersectionPoint</A></B>(<A HREF="../../../org/geotools/math/Line.html" title="class in org.geotools.math">Line</A> line)</CODE><BR> Returns the intersection point between this line and the specified one. </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/awt/geom/Point2D.html" title="class or interface in java.awt.geom">Point2D</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../org/geotools/math/Line.html#intersectionPoint(java.awt.geom.Line2D)">intersectionPoint</A></B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/awt/geom/Line2D.html" title="class or interface in java.awt.geom">Line2D</A> line)</CODE><BR> Returns the intersection point between this line and the specified bounded line. </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/awt/geom/Line2D.html" title="class or interface in java.awt.geom">Line2D</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../org/geotools/math/Line.html#isoscelesTriangleBase(java.awt.geom.Point2D, double)">isoscelesTriangleBase</A></B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/awt/geom/Point2D.html" title="class or interface in java.awt.geom">Point2D</A> summit, double sideLength)</CODE><BR> Compute the base of a isosceles triangle having the specified summit and side length. </TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/awt/geom/Point2D.html" title="class or interface in java.awt.geom">Point2D</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../org/geotools/math/Line.html#nearestColinearPoint(java.awt.geom.Point2D)">nearestColinearPoint</A></B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/awt/geom/Point2D.html" title="class or interface in java.awt.geom">Point2D</A> point)</CODE><BR> Returns the nearest point on this line from the specified point.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor">⌨️ 快捷键说明
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