📄 camera.html
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<CODE> int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javax/microedition/m3g/Camera.html#getProjection(float[])">getProjection</A></B>(float[] params)</CODE>
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Gets the current projection parameters and type. </TD>
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<CODE> int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javax/microedition/m3g/Camera.html#getProjection(javax.microedition.m3g.Transform)">getProjection</A></B>(<A HREF="../../../javax/microedition/m3g/Transform.html">Transform</A> transform)</CODE>
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Gets the current projection matrix and type. </TD>
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<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javax/microedition/m3g/Camera.html#setGeneric(javax.microedition.m3g.Transform)">setGeneric</A></B>(<A HREF="../../../javax/microedition/m3g/Transform.html">Transform</A> transform)</CODE>
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Sets the given 4x4 transformation as the current projection matrix. </TD>
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<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javax/microedition/m3g/Camera.html#setParallel(float, float, float, float)">setParallel</A></B>(float fovy, float aspectRatio, float near, float far)</CODE>
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Constructs a parallel projection matrix and sets that as the current projection matrix. </TD>
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<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../javax/microedition/m3g/Camera.html#setPerspective(float, float, float, float)">setPerspective</A></B>(float fovy, float aspectRatio, float near, float far)</CODE>
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Constructs a perspective projection matrix and sets that as the current projection matrix. </TD>
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<A NAME="methods_inherited_from_class_javax.microedition.m3g.Node"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%">
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<TD><B>Methods inherited from class javax.microedition.m3g.<A HREF="../../../javax/microedition/m3g/Node.html">Node</A></B></TD>
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<TD><CODE><A HREF="../../../javax/microedition/m3g/Node.html#align(javax.microedition.m3g.Node)">align</A>, <A HREF="../../../javax/microedition/m3g/Node.html#getAlphaFactor()">getAlphaFactor</A>, <A HREF="../../../javax/microedition/m3g/Node.html#getParent()">getParent</A>, <A HREF="../../../javax/microedition/m3g/Node.html#getScope()">getScope</A>, <A HREF="../../../javax/microedition/m3g/Node.html#getTransformTo(javax.microedition.m3g.Node, javax.microedition.m3g.Transform)">getTransformTo</A>, <A HREF="../../../javax/microedition/m3g/Node.html#isPickingEnabled()">isPickingEnabled</A>, <A HREF="../../../javax/microedition/m3g/Node.html#isRenderingEnabled()">isRenderingEnabled</A>, <A HREF="../../../javax/microedition/m3g/Node.html#setAlignment(javax.microedition.m3g.Node, int, javax.microedition.m3g.Node, int)">setAlignment</A>, <A HREF="../../../javax/microedition/m3g/Node.html#setAlphaFactor(float)">setAlphaFactor</A>, <A HREF="../../../javax/microedition/m3g/Node.html#setPickingEnable(boolean)">setPickingEnable</A>, <A HREF="../../../javax/microedition/m3g/Node.html#setRenderingEnable(boolean)">setRenderingEnable</A>, <A HREF="../../../javax/microedition/m3g/Node.html#setScope(int)">setScope</A></CODE></TD>
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<A NAME="methods_inherited_from_class_javax.microedition.m3g.Transformable"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%">
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<TD><B>Methods inherited from class javax.microedition.m3g.<A HREF="../../../javax/microedition/m3g/Transformable.html">Transformable</A></B></TD>
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<TD><CODE><A HREF="../../../javax/microedition/m3g/Transformable.html#getCompositeTransform(javax.microedition.m3g.Transform)">getCompositeTransform</A>, <A HREF="../../../javax/microedition/m3g/Transformable.html#getOrientation(float[])">getOrientation</A>, <A HREF="../../../javax/microedition/m3g/Transformable.html#getScale(float[])">getScale</A>, <A HREF="../../../javax/microedition/m3g/Transformable.html#getTransform(javax.microedition.m3g.Transform)">getTransform</A>, <A HREF="../../../javax/microedition/m3g/Transformable.html#getTranslation(float[])">getTranslation</A>, <A HREF="../../../javax/microedition/m3g/Transformable.html#postRotate(float, float, float, float)">postRotate</A>, <A HREF="../../../javax/microedition/m3g/Transformable.html#preRotate(float, float, float, float)">preRotate</A>, <A HREF="../../../javax/microedition/m3g/Transformable.html#scale(float, float, float)">scale</A>, <A HREF="../../../javax/microedition/m3g/Transformable.html#setOrientation(float, float, float, float)">setOrientation</A>, <A HREF="../../../javax/microedition/m3g/Transformable.html#setScale(float, float, float)">setScale</A>, <A HREF="../../../javax/microedition/m3g/Transformable.html#setTransform(javax.microedition.m3g.Transform)">setTransform</A>, <A HREF="../../../javax/microedition/m3g/Transformable.html#setTranslation(float, float, float)">setTranslation</A>, <A HREF="../../../javax/microedition/m3g/Transformable.html#translate(float, float, float)">translate</A></CODE></TD>
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<A NAME="methods_inherited_from_class_javax.microedition.m3g.Object3D"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%">
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<TD><B>Methods inherited from class javax.microedition.m3g.<A HREF="../../../javax/microedition/m3g/Object3D.html">Object3D</A></B></TD>
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<TD><CODE><A HREF="../../../javax/microedition/m3g/Object3D.html#addAnimationTrack(javax.microedition.m3g.AnimationTrack)">addAnimationTrack</A>, <A HREF="../../../javax/microedition/m3g/Object3D.html#animate(int)">animate</A>, <A HREF="../../../javax/microedition/m3g/Object3D.html#duplicate()">duplicate</A>, <A HREF="../../../javax/microedition/m3g/Object3D.html#find(int)">find</A>, <A HREF="../../../javax/microedition/m3g/Object3D.html#getAnimationTrack(int)">getAnimationTrack</A>, <A HREF="../../../javax/microedition/m3g/Object3D.html#getAnimationTrackCount()">getAnimationTrackCount</A>, <A HREF="../../../javax/microedition/m3g/Object3D.html#getReferences(javax.microedition.m3g.Object3D[])">getReferences</A>, <A HREF="../../../javax/microedition/m3g/Object3D.html#getUserID()">getUserID</A>, <A HREF="../../../javax/microedition/m3g/Object3D.html#getUserObject()">getUserObject</A>, <A HREF="../../../javax/microedition/m3g/Object3D.html#removeAnimationTrack(javax.microedition.m3g.AnimationTrack)">removeAnimationTrack</A>, <A HREF="../../../javax/microedition/m3g/Object3D.html#setUserID(int)">setUserID</A>, <A HREF="../../../javax/microedition/m3g/Object3D.html#setUserObject(java.lang.Object)">setUserObject</A></CODE></TD>
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<TD><B>Methods inherited from class java.lang.Object</B></TD>
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<TD><CODE>equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</CODE></TD>
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<!-- ============ FIELD DETAIL =========== -->
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<B>Field Detail</B></FONT></TD>
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<A NAME="GENERIC"><!-- --></A><H3>
GENERIC</H3>
<PRE>
public static final int <B>GENERIC</B></PRE>
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<DD><p>Specifies a generic 4x4 projection matrix.</p>
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<DT><B>See Also:</B><DD><A HREF="../../../constant-values.html#javax.microedition.m3g.Camera.GENERIC">Constant Field Values</A></DL>
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<A NAME="PARALLEL"><!-- --></A><H3>
PARALLEL</H3>
<PRE>
public static final int <B>PARALLEL</B></PRE>
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<DD><p>Specifies a parallel projection matrix.</p>
<P>
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<DT><B>See Also:</B><DD><A HREF="../../../constant-values.html#javax.microedition.m3g.Camera.PARALLEL">Constant Field Values</A></DL>
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<A NAME="PERSPECTIVE"><!-- --></A><H3>
PERSPECTIVE</H3>
<PRE>
public static final int <B>PERSPECTIVE</B></PRE>
<DL>
<DD><p>Specifies a perspective projection matrix.</p>
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../../../constant-values.html#javax.microedition.m3g.Camera.PERSPECTIVE">Constant Field Values</A></DL>
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<!-- ========= CONSTRUCTOR DETAIL ======== -->
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<B>Constructor Detail</B></FONT></TD>
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<A NAME="Camera()"><!-- --></A><H3>
Camera</H3>
<PRE>
public <B>Camera</B>()</PRE>
<DL>
<DD><p>Constructs a new Camera node with default values. The default values are as follows:</p> <ul> <li>projection mode : <code>PARALLEL</code></li> <li>view volume : opposite corners at (-1 -1 -1) and (1 1 1)</li> </ul>
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<!-- ============ METHOD DETAIL ========== -->
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<A NAME="setParallel(float, float, float, float)"><!-- --></A><H3>
setParallel</H3>
<PRE>
public void <B>setParallel</B>(float fovy, float aspectRatio, float near, float far)</PRE>
<DL>
<DD><p>Constructs a parallel projection matrix and sets that as the current projection matrix. Note that the near and far clipping planes may be in arbitrary order, although usually near < far.</p> <p>Denoting the width, height and depth of the view volume by <i>w</i>, <i>h</i> and <i>d</i>, respectively, the parallel projection matrix <b>P</b> is constructed as follows.</p> <blockquote> <pre>2/w 0 0 0 0 2/h 0 0 0 0 -2/d -(near+far)/d 0 0 0 1 </pre> </blockquote> <p>where</p> <blockquote> h = height (= fovy)<br> w = aspectRatio * h<br> d = far - near </blockquote> <p>The rendered image will "stretch" to fill the viewport entirely (not just the visible portion of it). It is therefore recommended that the aspect ratio given here be equal to the aspect ratio of the viewport as defined in <A HREF="../../../javax/microedition/m3g/Graphics3D.html#setViewport(int, int, int, int)"><CODE>setViewport</CODE></A>. Otherwise, the image will appear elongated in either the horizontal or the vertical direction. No attempt is made to correct this effect automatically, for example by adjusting the field of view. Instead,⌨️ 快捷键说明
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