line2d.html

来自「API資料大全」· HTML 代码 · 共 1,339 行 · 第 1/4 页

<DL>
<DD>Sets the location of the endpoints of this <code>Line2D</code> to
 the specified double coordinates.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>X1,&nbsp;Y1</CODE> - the first specified coordinate<DD><CODE>X2,&nbsp;Y2</CODE> - the second specified coordinate</DL>
</DD>
</DL>
<HR>

<A NAME="setLine(java.awt.geom.Point2D, java.awt.geom.Point2D)"><!-- --></A><H3>
setLine</H3>
<PRE>
public void <B>setLine</B>(<A HREF="../../../java/awt/geom/Point2D.html">Point2D</A>&nbsp;p1,
                    <A HREF="../../../java/awt/geom/Point2D.html">Point2D</A>&nbsp;p2)</PRE>
<DL>
<DD>Sets the location of the endpoints of this <code>Line2D</code> to
 the specified <code>Point2D</code> coordinates.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>p1,&nbsp;p2</CODE> - the specified <code>Point2D</code> objects</DL>
</DD>
</DL>
<HR>

<A NAME="setLine(java.awt.geom.Line2D)"><!-- --></A><H3>
setLine</H3>
<PRE>
public void <B>setLine</B>(<A HREF="../../../java/awt/geom/Line2D.html">Line2D</A>&nbsp;l)</PRE>
<DL>
<DD>Sets the location of the endpoints of this <code>Line2D</code> to
 the same as those endpoints of the specified <code>Line2D</code>.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>l</CODE> - the specified <code>Line2D</code></DL>
</DD>
</DL>
<HR>

<A NAME="relativeCCW(double, double, double, double, double, double)"><!-- --></A><H3>
relativeCCW</H3>
<PRE>
public static int <B>relativeCCW</B>(double&nbsp;X1,
                              double&nbsp;Y1,
                              double&nbsp;X2,
                              double&nbsp;Y2,
                              double&nbsp;PX,
                              double&nbsp;PY)</PRE>
<DL>
<DD>Returns an indicator of where the specified point 
 (PX,&nbsp;PY) lies with respect to the line segment from 
 (X1,&nbsp;Y1) to (X2,&nbsp;Y2).
 The value is 1 if the line segment must turn counterclockwise
 to point at the specified point, -1 if it must turn clockwise,
 or 0 if the point lies exactly on the line segment.
 If the point is colinear with the line segment, but not between
 the endpoints, then the value will be -1 if the point lies
 "beyond (X1,&nbsp;Y1)" or 1 if the point lies 
 "beyond (X2,&nbsp;Y2)".
 Note that an indicator value of 0 is rare and not useful for
 determining colinearity because of floating point rounding
 issues.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>X1,&nbsp;Y1</CODE> - the coordinates of the beginning of the
		specified line segment<DD><CODE>X2,&nbsp;Y2</CODE> - the coordinates of the end of the specified
		line segment<DD><CODE>PX,&nbsp;PY</CODE> - the coordinates of the specified point to be
 		compared with the specified line segment<DT><B>Returns:</B><DD>an integer that indicates the position of the third specified
			coordinates with respect to the line segment formed
			by the first two specified coordinates.</DL>
</DD>
</DL>
<HR>

<A NAME="relativeCCW(double, double)"><!-- --></A><H3>
relativeCCW</H3>
<PRE>
public int <B>relativeCCW</B>(double&nbsp;PX,
                       double&nbsp;PY)</PRE>
<DL>
<DD>Returns an indicator of where the specified point 
 (PX,&nbsp;PY) lies with respect to this line segment.
 The value is 1 if the line segment must turn counterclockwise
 to point at the specified point, -1 if it must turn clockwise,
 or 0 if the point lies exactly on the line segment.
 If the point is colinear with the line segment, but not between
 the endpoints, then the value is -1 if the point lies
 "beyond (x1,&nbsp;y1)" or 1 if the point lies 
 "beyond (x2,&nbsp;y2)".
 Note that an indicator value of 0 is rare and not useful for
 determining colinearity because of floating point rounding
 issues.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>PX,&nbsp;PY</CODE> - the coordinates of the specified point
			to be compared with the current line segment<DT><B>Returns:</B><DD>an integer that indicates the position of the specified
			coordinates with respect to the current line segment.</DL>
</DD>
</DL>
<HR>

<A NAME="relativeCCW(java.awt.geom.Point2D)"><!-- --></A><H3>
relativeCCW</H3>
<PRE>
public int <B>relativeCCW</B>(<A HREF="../../../java/awt/geom/Point2D.html">Point2D</A>&nbsp;p)</PRE>
<DL>
<DD>Returns an indicator of where the specified <code>Point2D</code>
 lies with respect to this line segment.
 The value is 1 if the line segment must turn counterclockwise
 to point at the specified point, -1 if it must turn clockwise,
 or 0 if the point lies exactly on the line segment.
 If the point is colinear with the line segment, but not between
 the endpoints, then the value is -1 if the point lies
 "beyond (x1,&nbsp;y1)" or 1 if the point lies 
 "beyond (x2,&nbsp;y2)".
 Note that an indicator value of 0 is rare and not useful for
 determining colinearity because of floating point rounding
 issues.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>p</CODE> - the specified <code>Point2D</code> to be compared 
			with the current line segment<DT><B>Returns:</B><DD>an integer that indicates the position of the 
			<code>Point2D</code> with respect to the current 
			line segment.</DL>
</DD>
</DL>
<HR>

<A NAME="linesIntersect(double, double, double, double, double, double, double, double)"><!-- --></A><H3>
linesIntersect</H3>
<PRE>
public static boolean <B>linesIntersect</B>(double&nbsp;X1,
                                     double&nbsp;Y1,
                                     double&nbsp;X2,
                                     double&nbsp;Y2,
                                     double&nbsp;X3,
                                     double&nbsp;Y3,
                                     double&nbsp;X4,
                                     double&nbsp;Y4)</PRE>
<DL>
<DD>Tests if the line segment from (X1,&nbsp;Y1) to 
 (X2,&nbsp;Y2) intersects the line segment from (X3,&nbsp;Y3) 
 to (X4,&nbsp;Y4).<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>X1,&nbsp;Y1</CODE> - the coordinates of the beginning of the first 
			specified line segment<DD><CODE>X2,&nbsp;Y2</CODE> - the coordinates of the end of the first 
			specified line segment<DD><CODE>X3,&nbsp;Y3</CODE> - the coordinates of the beginning of the second
			 specified line segment<DD><CODE>X4,&nbsp;Y4</CODE> - the coordinates of the end of the second 
			specified line segment<DT><B>Returns:</B><DD><code>true</code> if the first specified line segment 
			and the second specified line segment intersect  
			each other; <code>false</code> otherwise.</DL>
</DD>
</DL>
<HR>

<A NAME="intersectsLine(double, double, double, double)"><!-- --></A><H3>
intersectsLine</H3>
<PRE>
public boolean <B>intersectsLine</B>(double&nbsp;X1,
                              double&nbsp;Y1,
                              double&nbsp;X2,
                              double&nbsp;Y2)</PRE>
<DL>
<DD>Tests if the line segment from (X1,&nbsp;Y1) to 
 (X2,&nbsp;Y2) intersects this line segment.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>X1,&nbsp;Y1</CODE> - the coordinates of the beginning of the 
			specified line segment<DD><CODE>X2,&nbsp;Y2</CODE> - the coordinates of the end of the specified
			line segment<DT><B>Returns:</B><DD><true> if this line segment and the specified line segment
			intersect each other; <code>false</code> otherwise.</DL>
</DD>
</DL>
<HR>

<A NAME="intersectsLine(java.awt.geom.Line2D)"><!-- --></A><H3>
intersectsLine</H3>
<PRE>
public boolean <B>intersectsLine</B>(<A HREF="../../../java/awt/geom/Line2D.html">Line2D</A>&nbsp;l)</PRE>
<DL>
<DD>Tests if the specified line segment intersects this line segment.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>l</CODE> - the specified <code>Line2D</code><DT><B>Returns:</B><DD><code>true</code> if this line segment and the specified line
			segment intersect each other; 
			<code>false</code> otherwise.</DL>
</DD>
</DL>
<HR>

<A NAME="ptSegDistSq(double, double, double, double, double, double)"><!-- --></A><H3>
ptSegDistSq</H3>
<PRE>
public static double <B>ptSegDistSq</B>(double&nbsp;X1,
                                 double&nbsp;Y1,
                                 double&nbsp;X2,
                                 double&nbsp;Y2,
                                 double&nbsp;PX,
                                 double&nbsp;PY)</PRE>
<DL>
<DD>Returns the square of the distance from a point to a line segment.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>X1,&nbsp;Y1</CODE> - the coordinates of the beginning of the 
			specified line segment<DD><CODE>X2,&nbsp;Y2</CODE> - the coordinates of the end of the specified 
		line segment<DD><CODE>PX,&nbsp;PY</CODE> - the coordinates of the specified point being
		measured<DT><B>Returns:</B><DD>a double value that is the square of the distance from the
			specified point to the specified line segment.</DL>
</DD>
</DL>
<HR>

<A NAME="ptSegDist(double, double, double, double, double, double)"><!-- --></A><H3>
ptSegDist</H3>
<PRE>
public static double <B>ptSegDist</B>(double&nbsp;X1,
                               double&nbsp;Y1,
                               double&nbsp;X2,
                               double&nbsp;Y2,
                               double&nbsp;PX,
                               double&nbsp;PY)</PRE>
<DL>
<DD>Returns the distance from a point to a line segment.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>X1,&nbsp;Y1</CODE> - the coordinates of the beginning of the
		specified line segment<DD><CODE>X2,&nbsp;Y2</CODE> - the coordinates of the end of the specified line
 		segment<DD><CODE>PX,&nbsp;PY</CODE> - the coordinates of the specified point being
		measured<DT><B>Returns:</B><DD>a double value that is the distance from the specified point
				to the specified line segment.</DL>
</DD>
</DL>
<HR>

<A NAME="ptSegDistSq(double, double)"><!-- --></A><H3>
ptSegDistSq</H3>
<PRE>
public double <B>ptSegDistSq</B>(double&nbsp;PX,
                          double&nbsp;PY)</PRE>
<DL>
<DD>Returns the square of the distance from a point to this line segment.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>PX,&nbsp;PY</CODE> - the coordinates of the specified point being
 		measured<DT><B>Returns:</B><DD>a double value that is the square of the distance from a
			specified point to the current line segment.</DL>
</DD>
</DL>
<HR>

<A NAME="ptSegDistSq(java.awt.geom.Point2D)"><!-- --></A><H3>
ptSegDistSq</H3>
<PRE>
public double <B>ptSegDistSq</B>(<A HREF="../../../java/awt/geom/Point2D.html">Point2D</A>&nbsp;pt)</PRE>
<DL>
<DD>Returns the square of the distance from a <code>Point2D</code> to 
 this line segment.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>pt</CODE> - the specified <code>Point2D</code> being measured<DT><B>Returns:</B><DD>a double value that is the square of the distance from a
			specified <code>Point2D</code> to the current 
			line segment.</DL>
</DD>
</DL>
<HR>

<A NAME="ptSegDist(double, double)"><!-- --></A><H3>
ptSegDist</H3>
<PRE>
public double <B>ptSegDist</B>(double&nbsp;PX,
                        double&nbsp;PY)</PRE>
<DL>
<DD>Returns the distance from a point to this line segment.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>PX,&nbsp;PY</CODE> - the coordinates of the specified point
				 being measured<DT><B>Returns:</B><DD>a double value that is the distance from a specified 
				point to the current line segment.</DL>
</DD>
</DL>
<HR>

<A NAME="ptSegDist(java.awt.geom.Point2D)"><!-- --></A><H3>
ptSegDist</H3>
<PRE>
public double <B>ptSegDist</B>(<A HREF="../../../java/awt/geom/Point2D.html">Point2D</A>&nbsp;pt)</PRE>
<DL>
<DD>Returns the distance from a <code>Point2D</code> to this line
 segment.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>pt</CODE> - the specified <code>Point2D</code> being measured<DT><B>Returns:</B><DD>a double value that is the distance from a specified
				<code>Point2D</code> to the current line
				segment.</DL>
</DD>
</DL>
<HR>

<A NAME="ptLineDistSq(double, double, double, double, double, double)"><!-- --></A><H3>
ptLineDistSq</H3>
<PRE>
public static double <B>ptLineDistSq</B>(double&nbsp;X1,
                                  double&nbsp;Y1,
                                  double&nbsp;X2,
                                  double&nbsp;Y2,
                                  double&nbsp;PX,
                                  double&nbsp;PY)</PRE>
<DL>
<DD>Returns the square of the distance from a point to a line.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>X1,&nbsp;Y1</CODE> - the coordinates of the beginning of the
 		specified line segment<DD><CODE>X2,&nbsp;Y2</CODE> - the coordinates of the end of the specified 
		line segment<DD><CODE>PX,&nbsp;PY</CODE> - the coordinates of the specified point being
 		measured<DT><B>Returns:</B><DD>a double value that is the square of the distance from a
			specified point to a specified line segment.</DL>
</DD>
</DL>