pathinterpolator.html

JAVA多媒体开发类库说明

 is copied into this PathInterpolator object.
<P>
<DL>
<DT><B>Parameters:</B><DD><CODE>alpha</CODE> - the alpha object for this interpolator.<DD><CODE>target</CODE> - the transformgroup node effected by this pathInterpolator<DD><CODE>knots</CODE> - an array of knot values that specify interpolation
 points.<DT><B>Since:</B></DT>
  <DD>Java 3D 1.3</DD>
</DL>
</DL>
<HR>

<A NAME="PathInterpolator(javax.media.j3d.Alpha, javax.media.j3d.TransformGroup, javax.media.j3d.Transform3D, float[])"><!-- --></A><H3>
PathInterpolator</H3>
<PRE>
public <B>PathInterpolator</B>(<A HREF="../../../javax/media/j3d/Alpha.html" title="class in javax.media.j3d">Alpha</A>&nbsp;alpha,
                        <A HREF="../../../javax/media/j3d/TransformGroup.html" title="class in javax.media.j3d">TransformGroup</A>&nbsp;target,
                        <A HREF="../../../javax/media/j3d/Transform3D.html" title="class in javax.media.j3d">Transform3D</A>&nbsp;axisOfTransform,
                        float[]&nbsp;knots)</PRE>
<DL>
<DD>Constructs a new PathInterpolator object that interpolates
 between the knot values in the knots array.  The array of knots
 is copied into this PathInterpolator object.
<P>
<DL>
<DT><B>Parameters:</B><DD><CODE>alpha</CODE> - the alpha object for this interpolator.<DD><CODE>target</CODE> - the transform node effected by this positionInterpolator<DD><CODE>axisOfTransform</CODE> - the transform that defines the local coordinate<DD><CODE>knots</CODE> - an array of knot values that specify interpolation
 points.<DT><B>Since:</B></DT>
  <DD>Java 3D 1.3</DD>
</DL>
</DL>

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<A NAME="getArrayLengths()"><!-- --></A><H3>
getArrayLengths</H3>
<PRE>
public int <B>getArrayLengths</B>()</PRE>
<DL>
<DD>Retrieves the length of the knots array.
<P>
<DD><DL>

<DT><B>Returns:</B><DD>the array length</DL>
</DD>
</DL>
<HR>

<A NAME="setKnot(int, float)"><!-- --></A><H3>
setKnot</H3>
<PRE>
public void <B>setKnot</B>(int&nbsp;index,
                    float&nbsp;knot)</PRE>
<DL>
<DD>Sets the knot at the specified index for this interpolator.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>index</CODE> - the index to be changed<DD><CODE>knot</CODE> - the new knot value</DL>
</DD>
</DL>
<HR>

<A NAME="getKnot(int)"><!-- --></A><H3>
getKnot</H3>
<PRE>
public float <B>getKnot</B>(int&nbsp;index)</PRE>
<DL>
<DD>Retrieves the knot at the specified index.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>index</CODE> - the index of the value requested
<DT><B>Returns:</B><DD>the interpolator's knot value at the associated index</DL>
</DD>
</DL>
<HR>

<A NAME="setKnots(float[])"><!-- --></A><H3>
setKnots</H3>
<PRE>
protected void <B>setKnots</B>(float[]&nbsp;knots)</PRE>
<DL>
<DD>Replaces the existing array of knot values with
 the specified array.  The array of knots is copied into this
 interpolator object.  Prior to calling this method,
 subclasses should verify that the lengths of the new knots array
 and subclass-specific parameter arrays are the same.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>knots</CODE> - a new array of knot values that specify
 interpolation points.<DT><B>Since:</B></DT>
  <DD>Java 3D 1.2</DD>
</DL>
</DD>
</DL>
<HR>

<A NAME="getKnots(float[])"><!-- --></A><H3>
getKnots</H3>
<PRE>
public void <B>getKnots</B>(float[]&nbsp;knots)</PRE>
<DL>
<DD>Copies the array of knots from this interpolator
 into the specified array.
 The array must be large enough to hold all of the knots.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>knots</CODE> - array that will receive the knots.<DT><B>Since:</B></DT>
  <DD>Java 3D 1.2</DD>
</DL>
</DD>
</DL>
<HR>

<A NAME="computePathInterpolation(float)"><!-- --></A><H3>
computePathInterpolation</H3>
<PRE>
protected void <B>computePathInterpolation</B>(float&nbsp;alphaValue)</PRE>
<DL>
<DD>Computes the base knot index and interpolation value
 given the specified value of alpha and the knots[] array.  If
 the index is 0 and there should be no interpolation, both the
 index variable and the interpolation variable are set to 0.
 Otherwise, currentKnotIndex is set to the lower index of the
 two bounding knot points and the currentInterpolationValue
 variable is set to the ratio of the alpha value between these
 two bounding knot points.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>alphaValue</CODE> - alpha value between 0.0 and 1.0<DT><B>Since:</B></DT>
  <DD>Java 3D 1.3</DD>
</DL>
</DD>
</DL>
<HR>

<A NAME="computePathInterpolation()"><!-- --></A><H3>
computePathInterpolation</H3>
<PRE>
protected void <B>computePathInterpolation</B>()</PRE>
<DL>
<DD><B>Deprecated.</B>&nbsp;<I>As of Java 3D version 1.3, replaced by
 <code>computePathInterpolation(float)</code></I>
<P>
<DD><DL>
</DL>
</DD>
</DL>
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