pointarray2d.html

Geotools是一个开源的Java GIS工具包,可利用它来开发符合标准的地理信息系统。Geotools提供了OGC(Open Geospatial Consortium)规范的一个实现来作为他们的

                                      int&nbsp;upper)</PRE>
<DL>
<DD>Returns an array that share the points in this array from point  inclusive
 to  exclusive. If the subarray doesn't contains any point (i.e. if
 ), then this method returns .
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>lower</CODE> - Index of the first point, inclusive.<DD><CODE>upper</CODE> - Index of the last point, exclusive.</DL>
</DD>
</DL>
<HR>

<A NAME="insertAt(int, org.geotools.geometry.array.PointArray2D, boolean)"><!-- --></A><H3>
insertAt</H3>
<PRE>
public final <A HREF="../../../../org/geotools/geometry/array/PointArray2D.html" title="class in org.geotools.geometry.array">PointArray2D</A> <B>insertAt</B>(int&nbsp;index,
                                   <A HREF="../../../../org/geotools/geometry/array/PointArray2D.html" title="class in org.geotools.geometry.array">PointArray2D</A>&nbsp;toMerge,
                                   boolean&nbsp;reverse)</PRE>
<DL>
<DD>Inserts all points from  into  at position .
 If  is , then the points are inserted in reverse order.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>index</CODE> - Index where to insert the first point in this array.<DD><CODE>toMerge</CODE> - The points to insert.<DD><CODE>reverse</CODE> -  for inserting the coordinates in reverse order.</DL>
</DD>
</DL>
<HR>

<A NAME="insertAt(int, float[], int, int, boolean)"><!-- --></A><H3>
insertAt</H3>
<PRE>
public abstract <A HREF="../../../../org/geotools/geometry/array/PointArray2D.html" title="class in org.geotools.geometry.array">PointArray2D</A> <B>insertAt</B>(int&nbsp;index,
                                      float[]&nbsp;toMerge,
                                      int&nbsp;lower,
                                      int&nbsp;upper,
                                      boolean&nbsp;reverse)</PRE>
<DL>
<DD>Inserts an array of (<var>x</var>,<var>y</var>) coordinates at position .
 If  is , then the points are inserted in reverse order.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>index</CODE> - Index where to insert the first point in this array.<DD><CODE>toMerge</CODE> - The points to insert as an array of (<var>x</var>,<var>y</var>) coordinates.<DD><CODE>lower</CODE> - Index (inclusive) of the first ordinates to copy from .<DD><CODE>upper</CODE> - Index (exclusive) of the last ordinates to copy from .<DD><CODE>reverse</CODE> -  for inserting the coordinates in reverse order.
<DT><B>Returns:</B><DD>An array which contains all data from this array, with the  data
         inserted into. May returns  if the insertion has been applied in-place.</DL>
</DD>
</DL>
<HR>

<A NAME="reverse()"><!-- --></A><H3>
reverse</H3>
<PRE>
public abstract <A HREF="../../../../org/geotools/geometry/array/PointArray2D.html" title="class in org.geotools.geometry.array">PointArray2D</A> <B>reverse</B>()</PRE>
<DL>
<DD>Reverts all coordinate points order in this array. The last point become first, and
 the first point become last.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>All array which contains the points in reversed order. May returns 
         if the operation has been applied in-place.</DL>
</DD>
</DL>
<HR>

<A NAME="getFinal(org.geotools.geometry.array.CompressionLevel)"><!-- --></A><H3>
getFinal</H3>
<PRE>
public <A HREF="../../../../org/geotools/geometry/array/PointArray2D.html" title="class in org.geotools.geometry.array">PointArray2D</A> <B>getFinal</B>(<A HREF="../../../../org/geotools/geometry/array/CompressionLevel.html" title="class in org.geotools.geometry.array">CompressionLevel</A>&nbsp;level)</PRE>
<DL>
<DD>Returns an immutable copy of this array. Invoking any <A HREF="../../../../org/geotools/geometry/array/PointArray2D.html#insertAt(int, org.geotools.geometry.array.PointArray2D, boolean)"><CODE>insertAt</CODE></A> or
 <A HREF="../../../../org/geotools/geometry/array/PointArray2D.html#reverse()"><CODE>reverse</CODE></A> method on the returned array while result in a new array
 being returned by the above-cited methods, instead of performing the operations in-place.
 In addition, this method can optionnaly compress the data.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>level</CODE> - The compression level, or  if no compression is wanted.
<DT><B>Returns:</B><DD>An immutable (and optionnaly compressed) copy of this array, or 
         if this array already meet the requirements, or  if this array
         doesn't contain any data.</DL>
</DD>
</DL>
<HR>

<A NAME="toFloatArray(org.geotools.geometry.array.ArrayData, float)"><!-- --></A><H3>
toFloatArray</H3>
<PRE>
public abstract void <B>toFloatArray</B>(<A HREF="../../../../org/geotools/geometry/array/ArrayData.html" title="class in org.geotools.geometry.array">ArrayData</A>&nbsp;dest,
                                  float&nbsp;resolutionSquared)</PRE>
<DL>
<DD>Appends (<var>x</var>,<var>y</var>) coordinates to the specified destination array.
 The destination array will be filled starting at index <A HREF="../../../../org/geotools/geometry/array/ArrayData.html#length()"><CODE>ArrayData.length()</CODE></A>.
 If  is greater than 0, then points that are closer than
  from previous one will be skiped.
 <p>
 <strong>Implementation note</strong><br>
 Many implementations will compute distances using Pythagoras formulas, which is okay for
 projected CRS but not strictly right
 for geographic CRS. This is not a real
 problem when the <A HREF="../../../../org/geotools/display/canvas/ReferencedCanvas.html#getObjectiveCRS()">objective CRS</A> is the same one than the <A HREF="../../../../org/geotools/geometry/array/PointArray2D.html#getCoordinateReferenceSystem()">data CRS</A>,
 since the decimation performed by this  method target specifically the
 rendering device. However, it may be a problem when the objective CRS is different, since
 points that are equidistant in the data CRS may not be equidistant in the objective CRS. In
 order to minimize the deformations induced by map projections, this method should be invoked
 only on  objects covering a relatively small geographic area.
  objects covering a large geographic area shall be splitted into smaller
  objects using the <A HREF="../../../../org/geotools/geometry/array/PointArray2D.html#subarray(int, int)"><CODE>subarray</CODE></A> method.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>dest</CODE> - The destination array.<DD><CODE>resolutionSquared</CODE> - The minimum squared distance desired between points.
         A value of 0 keep all points.</DL>
</DD>
</DL>
<HR>

<A NAME="toFloatArray()"><!-- --></A><H3>
toFloatArray</H3>
<PRE>
public final float[] <B>toFloatArray</B>()</PRE>
<DL>
<DD>Returns a copy of all (<var>x</var>,<var>y</var>) coordinates in this array.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="toShape(java.awt.geom.AffineTransform)"><!-- --></A><H3>
toShape</H3>
<PRE>
public final <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/awt/Shape.html" title="class or interface in java.awt">Shape</A> <B>toShape</B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/awt/geom/AffineTransform.html" title="class or interface in java.awt.geom">AffineTransform</A>&nbsp;transform)</PRE>
<DL>
<DD>Returns this  as a <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/awt/Shape.html" title="class or interface in java.awt">shape</A>.  This shape is not
 designed for map rendering. It is rather a debugging tool, as well as a convenient
 way to draw lines in some simple context.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>transform</CODE> - An optional transform to apply on coordinates, or  if none.
<DT><B>Returns:</B><DD>The lines in this  as a Java2D <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/awt/Shape.html" title="class or interface in java.awt">shape</A>.</DL>
</DD>
</DL>
<HR>

<A NAME="toString()"><!-- --></A><H3>
toString</H3>
<PRE>
public final <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A> <B>toString</B>()</PRE>
<DL>
<DD>Returns a string representation of this array. This method is mostly for debugging
 purpose and may change in any future Geotools version. Current implementation returns
 the class name, the number of points and the start and end coordinates.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="equals(org.geotools.geometry.array.PointArray2D)"><!-- --></A><H3>
equals</H3>
<PRE>
public final boolean <B>equals</B>(<A HREF="../../../../org/geotools/geometry/array/PointArray2D.html" title="class in org.geotools.geometry.array">PointArray2D</A>&nbsp;that)</PRE>
<DL>
<DD>Compares this array with the specified one for equality. Two arrays are considered
 identical if they contains the same coordinates in the same order. The actual array
 implementation doesn't matter.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="equals(java.lang.Object)"><!-- --></A><H3>
equals</H3>
<PRE>
public final boolean <B>equals</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>&nbsp;that)</PRE>
<DL>
<DD>Compares this array with the specified object for equality. This method performs the same
 comparaison than <A HREF="../../../../org/geotools/geometry/array/PointArray2D.html#equals(org.geotools.geometry.array.PointArray2D)"><CODE>equals(PointArray2D)</CODE></A>.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="hashCode()"><!-- --></A><H3>
hashCode</H3>
<PRE>
public final int <B>hashCode</B>()</PRE>
<DL>
<DD>Returns a hash value for this array.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
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