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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 1.5.0_06) on Wed Dec 13 16:20:06 PST 2006 --><TITLE>Screen3D (Java 3D 1.5.0)</TITLE><META NAME="keywords" CONTENT="javax.media.j3d.Screen3D class"><LINK REL ="stylesheet" TYPE="text/css" HREF="../../../stylesheet.css" TITLE="Style"><SCRIPT type="text/javascript">function windowTitle(){ parent.document.title="Screen3D (Java 3D 1.5.0)";}</SCRIPT><NOSCRIPT></NOSCRIPT></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=2 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="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="../../../javax/media/j3d/SceneGraphPath.html" title="class in javax.media.j3d"><B>PREV CLASS</B></A> <A HREF="../../../javax/media/j3d/Sensor.html" title="class in javax.media.j3d"><B>NEXT CLASS</B></A></FONT></TD><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../index.html?javax/media/j3d/Screen3D.html" target="_top"><B>FRAMES</B></A> <A HREF="Screen3D.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 | CONSTR | <A HREF="#method_summary">METHOD</A></FONT></TD><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2">DETAIL: FIELD | CONSTR | <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">javax.media.j3d</FONT><BR>Class Screen3D</H2><PRE>java.lang.Object <IMG SRC="../../../resources/inherit.gif" ALT="extended by "><B>javax.media.j3d.Screen3D</B></PRE><HR><DL><DT><PRE>public class <B>Screen3D</B><DT>extends java.lang.Object</DL></PRE><P>The Screen3D Object contains all information about a particular screen. All Canvas3D objects on the same physical screen (display device) refer to the same Screen3D object. Note that Screen3D has no public constructors--it is obtained from the Canvas3D via the getScreen3D method. <p> Default values for Screen3D parameters are as follows: <ul> physical screen width : 0.0254/90.0 * screen width (in pixels)<br> physical screen height : 0.0254/90.0 * screen height (in pixels)<br> tracker base to image plate transform : identity<br> head tracker to left image plate transform : identity<br> head tracker to right image plate transform : identity<br> off-screen size : (0,0)<br> </ul> <P> <b>Offscreen Rendering</b><P> New for Java 3D 1.2, an off-screen rendering mode allows rendering to a memory image, which is possibly larger than the screen. The setSize and getSize methods are defined specifically for this mode. Note that the off-screen size, physical width, and physical height must be set prior to rendering to the associated off-screen canvas. Failure to do so will result in an exception.<P> <b>Calibration Parameters</b><P> The Screen3D object must be calibrated with the coexistence volume. The Screen3D class provides several methods for defining the calibration parameters.<P> <UL>Measured Parameters<P> The screen's (image plate's) physical width and height (in meters) is set once, typically by a browser, calibration program, system administrator, or system calibrator, not by an applet. These values must be determined by measuring the display's active image width and height. In the case of a head-mounted display, this should be the display's apparent width and height at the focal plane. These values are defined by the setPhysicalScreenWidth and setPhysicalScreenHeight methods.<P> Head-tracker Coordinate System<P> If head tracking is enabled, one of two parameters need to be specified:<P> <UL><LI>If the view policy is SCREEN_VIEW, the tracker-base-to-image-plate coordinate system must be specified (setTrackerBaseToImagePlate method). This coordinate system must be recalibrated whenever the image plate moves relative to the tracker.</LI><P> <LI>If the view policy is HMD_VIEW, the head-tracker-to-left-image-plate and head-tracker-to-right-image-plate coordinate systems must be specified (setHeadTrackerToLeftImagePlate and setHeadTrackerToRightImagePlate methods).</LI><P></UL> </UL><P> <p> <b>Additional Information</b> <p> For more information, see the <a href="doc-files/intro.html">Introduction to the Java 3D API</a> and <a href="doc-files/ViewModel.html">View Model</a> documents.<P><P><DL><DT><B>See Also:</B><DD><A HREF="../../../javax/media/j3d/Canvas3D.html" title="class in javax.media.j3d"><CODE>Canvas3D</CODE></A>, <A HREF="../../../javax/media/j3d/Canvas3D.html#getScreen3D()"><CODE>Canvas3D.getScreen3D()</CODE></A></DL><HR><P><!-- ========== METHOD SUMMARY =========== --><A NAME="method_summary"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"><B>Method Summary</B></FONT></TH></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="../../../javax/media/j3d/Screen3D.html#getHeadTrackerToLeftImagePlate(javax.media.j3d.Transform3D)">getHeadTrackerToLeftImagePlate</A></B>(<A HREF="../../../javax/media/j3d/Transform3D.html" title="class in javax.media.j3d">Transform3D</A> t)</CODE><BR> Retrieves the head-tracker coordinate system to left image-plate coordinate system transform and copies it into the specified Transform3D object.</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="../../../javax/media/j3d/Screen3D.html#getHeadTrackerToRightImagePlate(javax.media.j3d.Transform3D)">getHeadTrackerToRightImagePlate</A></B>(<A HREF="../../../javax/media/j3d/Transform3D.html" title="class in javax.media.j3d">Transform3D</A> t)</CODE><BR> Retrieves the head-tracker coordinate system to right image-plate coordinate system transform and copies it into the specified Transform3D object.</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="../../../javax/media/j3d/Screen3D.html#getPhysicalScreenHeight()">getPhysicalScreenHeight</A></B>()</CODE><BR> Retrieves the the screen's physical height in meters.</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="../../../javax/media/j3d/Screen3D.html#getPhysicalScreenWidth()">getPhysicalScreenWidth</A></B>()</CODE><BR> Retrieves the screen's physical width in meters.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> java.awt.Dimension</CODE></FONT></TD><TD><CODE><B><A HREF="../../../javax/media/j3d/Screen3D.html#getSize()">getSize</A></B>()</CODE><BR> Retrieves the width and height (in pixels) of this Screen3D.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> java.awt.Dimension</CODE></FONT></TD><TD><CODE><B><A HREF="../../../javax/media/j3d/Screen3D.html#getSize(java.awt.Dimension)">getSize</A></B>(java.awt.Dimension rv)</CODE><BR> Retrieves the width and height (in pixels) of this Screen3D and copies it into the specified Dimension object.</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="../../../javax/media/j3d/Screen3D.html#getTrackerBaseToImagePlate(javax.media.j3d.Transform3D)">getTrackerBaseToImagePlate</A></B>(<A HREF="../../../javax/media/j3d/Transform3D.html" title="class in javax.media.j3d">Transform3D</A> t)</CODE><BR> Retrieves the tracker-base coordinate system to image-plate coordinate system transform and copies it into the specified Transform3D object.</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="../../../javax/media/j3d/Screen3D.html#setHeadTrackerToLeftImagePlate(javax.media.j3d.Transform3D)">setHeadTrackerToLeftImagePlate</A></B>(<A HREF="../../../javax/media/j3d/Transform3D.html" title="class in javax.media.j3d">Transform3D</A> t)</CODE><BR> Sets the head-tracker coordinate system to left image-plate coordinate system transform.</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="../../../javax/media/j3d/Screen3D.html#setHeadTrackerToRightImagePlate(javax.media.j3d.Transform3D)">setHeadTrackerToRightImagePlate</A></B>(<A HREF="../../../javax/media/j3d/Transform3D.html" title="class in javax.media.j3d">Transform3D</A> t)</CODE><BR> Sets the head-tracker coordinate system to right image-plate coordinate system transform.</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="../../../javax/media/j3d/Screen3D.html#setPhysicalScreenHeight(double)">setPhysicalScreenHeight</A></B>(double height)</CODE><BR> Sets the screen physical height in meters.</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="../../../javax/media/j3d/Screen3D.html#setPhysicalScreenWidth(double)">setPhysicalScreenWidth</A></B>(double width)</CODE><BR> Sets the screen physical width in meters.</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="../../../javax/media/j3d/Screen3D.html#setSize(java.awt.Dimension)">setSize</A></B>(java.awt.Dimension d)</CODE><BR> Sets the width and height (in pixels) of this off-screen Screen3D.</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="../../../javax/media/j3d/Screen3D.html#setSize(int, int)">setSize</A></B>(int width, int height)</CODE><BR> Sets the width and height (in pixels) of this off-screen Screen3D.</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="../../../javax/media/j3d/Screen3D.html#setTrackerBaseToImagePlate(javax.media.j3d.Transform3D)">setTrackerBaseToImagePlate</A></B>(<A HREF="../../../javax/media/j3d/Transform3D.html" title="class in javax.media.j3d">Transform3D</A> t)</CODE><BR> Sets the tracker-base coordinate system to image-plate coordinate system transform.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> java.lang.String</CODE></FONT></TD><TD><CODE><B><A HREF="../../../javax/media/j3d/Screen3D.html#toString()">toString</A></B>()</CODE><BR> </TD></TR></TABLE> <A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A><TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""><TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"><TH ALIGN="left"><B>Methods inherited from class java.lang.Object</B></TH></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE>clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait</CODE></TD></TR></TABLE> <P><!-- ============ METHOD DETAIL ========== --><A NAME="method_detail"><!-- --></A>⌨️ 快捷键说明
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