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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN""http://www.w3.org/TR/REC-html40/loose.dtd"><!--NewPage--><HTML><HEAD><!-- Generated by javadoc on Fri Apr 18 11:16:59 PDT 2003 --><TITLE>PickCanvas (Java 3D API)</TITLE><LINK REL ="stylesheet" TYPE="text/css" HREF="../../../../../stylesheet.css" TITLE="Style"></HEAD><SCRIPT>function asd(){parent.document.title="PickCanvas (Java 3D API)";}</SCRIPT><BODY BGCOLOR="white" onload="asd();"><!-- ========== START OF NAVBAR ========== --><A NAME="navbar_top"><!-- --></A><TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0"><TR><TD COLSPAN=3 BGCOLOR="#EEEEFF" CLASS="NavBarCell1"><A NAME="navbar_top_firstrow"><!-- --></A><TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3"> <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="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"> PREV CLASS <A HREF="../../../../../com/sun/j3d/utils/picking/PickIntersection.html"><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="PickCanvas.html" TARGET="_top"><B>NO FRAMES</B></A> <SCRIPT> <!-- if(window==top) { document.writeln('<A HREF="../../../../../allclasses-noframe.html" TARGET=""><B>All Classes</B></A>'); } //--></SCRIPT><NOSCRIPT><A HREF="../../../../../allclasses-noframe.html" TARGET=""><B>All Classes</B></A></NOSCRIPT></FONT></TD></TR><TR><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> SUMMARY: NESTED | <A HREF="#fields_inherited_from_class_com.sun.j3d.utils.picking.PickTool">FIELD</A> | <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><!-- =========== END OF NAVBAR =========== --><HR><!-- ======== START OF CLASS DATA ======== --><H2><FONT SIZE="-1">com.sun.j3d.utils.picking</FONT><BR>Class PickCanvas</H2><PRE>java.lang.Object | +--<A HREF="../../../../../com/sun/j3d/utils/picking/PickTool.html">com.sun.j3d.utils.picking.PickTool</A> | +--<B>com.sun.j3d.utils.picking.PickCanvas</B></PRE><HR><DL><DT>public class <B>PickCanvas</B><DT>extends <A HREF="../../../../../com/sun/j3d/utils/picking/PickTool.html">PickTool</A></DL><P>A subclass of PickTool, simplifies picking using mouse events from a canvas. This class allows picking using canvas x,y locations by generating the appropriate pick shape. <p> The pick tolerance specifies the distance from the pick center to include in the pick shape. A tolerance of 0.0 may speedup picking slightly, but also make it very difficult to pick points and lines. <p> The pick canvas can be used to make a series of picks. For example, to initialize the pick canvas: <blockquote><pre> PickCanvas pickCanvas = new PickCanvas(canvas, scene); pickCanvas.setMode(PickTool.GEOMETRY_INTERSECT_INFO); pickCanvas.setTolerance(4.0f); </pre></blockquote> <p> Then for each mouse event: <blockquote><pre> pickCanvas.setShapeLocation(mouseEvent); PickResult[] results = pickCanvas.pickAll(); </pre></blockquote> <p> NOTE: For the pickAllSorted or pickClosest methods, the picks will be sorted by the distance from the ViewPlatform to the intersection point.<P><P><DL><DT><B>See Also:</B><DD><A HREF="../../../../../com/sun/j3d/utils/picking/PickTool.html"><CODE>PickTool</CODE></A></DL><HR><P><!-- ======== NESTED CLASS SUMMARY ======== --><!-- =========== FIELD SUMMARY =========== --><A NAME="field_summary"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=2><FONT SIZE="+2"><B>Field Summary</B></FONT></TD></TR></TABLE> <A NAME="fields_inherited_from_class_com.sun.j3d.utils.picking.PickTool"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"><TD><B>Fields inherited from class com.sun.j3d.utils.picking.<A HREF="../../../../../com/sun/j3d/utils/picking/PickTool.html">PickTool</A></B></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><A HREF="../../../../../com/sun/j3d/utils/picking/PickTool.html#BOUNDS">BOUNDS</A>, <A HREF="../../../../../com/sun/j3d/utils/picking/PickTool.html#GEOMETRY">GEOMETRY</A>, <A HREF="../../../../../com/sun/j3d/utils/picking/PickTool.html#GEOMETRY_INTERSECT_INFO">GEOMETRY_INTERSECT_INFO</A>, <A HREF="../../../../../com/sun/j3d/utils/picking/PickTool.html#INTERSECT_COORD">INTERSECT_COORD</A>, <A HREF="../../../../../com/sun/j3d/utils/picking/PickTool.html#INTERSECT_FULL">INTERSECT_FULL</A>, <A HREF="../../../../../com/sun/j3d/utils/picking/PickTool.html#INTERSECT_TEST">INTERSECT_TEST</A>, <A HREF="../../../../../com/sun/j3d/utils/picking/PickTool.html#userDefineShape">userDefineShape</A></CODE></TD></TR></TABLE> <!-- ======== CONSTRUCTOR SUMMARY ======== --><A NAME="constructor_summary"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><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="../../../../../com/sun/j3d/utils/picking/PickCanvas.html#PickCanvas(javax.media.j3d.Canvas3D, javax.media.j3d.BranchGroup)">PickCanvas</A></B>(<A HREF="../../../../../javax/media/j3d/Canvas3D.html">Canvas3D</A> c, <A HREF="../../../../../javax/media/j3d/BranchGroup.html">BranchGroup</A> b)</CODE><BR> Constructor with Canvas3D for mouse events and BranchGroup to be picked.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE><B><A HREF="../../../../../com/sun/j3d/utils/picking/PickCanvas.html#PickCanvas(javax.media.j3d.Canvas3D, javax.media.j3d.Locale)">PickCanvas</A></B>(<A HREF="../../../../../javax/media/j3d/Canvas3D.html">Canvas3D</A> c, <A HREF="../../../../../javax/media/j3d/Locale.html">Locale</A> l)</CODE><BR> Constructor with Canvas3D for mouse events and Locale to be picked.</TD></TR></TABLE> <!-- ========== METHOD SUMMARY =========== --><A NAME="method_summary"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><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="../../../../../javax/media/j3d/Canvas3D.html">Canvas3D</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../../../../com/sun/j3d/utils/picking/PickCanvas.html#getCanvas()">getCanvas</A></B>()</CODE><BR> Inquire the canvas to be used for picking operations.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> float</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../../com/sun/j3d/utils/picking/PickCanvas.html#getTolerance()">getTolerance</A></B>()</CODE><BR> Get the pick tolerance.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> void</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../../com/sun/j3d/utils/picking/PickCanvas.html#setShapeLocation(int, int)">setShapeLocation</A></B>(int xpos, int ypos)</CODE><BR> Set the pick location.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> void</CODE></FONT></TD><TD><CODE><B><A HREF="../../../../../com/sun/j3d/utils/picking/PickCanvas.html#setShapeLocation(java.awt.event.MouseEvent)">setShapeLocation</A></B>(java.awt.event.MouseEvent mevent)</CODE><BR> Set the pick location.</TD>⌨️ 快捷键说明
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