It will work: I have used it to smooth 3D spacial lines.
please find here an bit of code where I use this:
/**
* return an array of points interpolated from the given knots
* it is hardcoded to being 5 times the number of knots
* this is done by building the new inferred points from an existing
java3D
* interpolator overloaded so that i can manually manged its output
* @param the base knots
* @return the interpolated array of points
*/
private Point3f[] getSpline(Point3f[] knots) {
file://build an iterator to reuse existing java3d facility
MyAlpha myAlpha = new MyAlpha ();
file://create knots
Matrix4d mat = new Matrix4d();
Quat4f r = new Quat4f ();
r.set(mat); file://no rotation
Point3f s = new Point3f(1.0f, 1.0f, 1.0f); // uniform scale
int nb = knots.length;
file://set the points as knots
TCBKeyFrame[] splineKeyFrames = new TCBKeyFrame[nb];
for (int i = 0; i < nb; i++) {
splineKeyFrames[i] = new TCBKeyFrame((float)i/(nb - 1), 0, knots[i],
r,
s, 0.0f, 0.0f, 0.0f);
}
// create spline interpolator
TransformGroup target = new TransformGroup();
RotPosScaleTCBSplinePathInterpolator splineInterpolator =
new RotPosScaleTCBSplinePathInterpolator(myAlpha, target,
new Transform3D(),
splineKeyFrames);
Point3f[] newPoints = new Point3f[nb*5 + 1];
file://add 5 interpolated values for each segment
Transform3D transform3d = new Transform3D();
Vector3d vec = new Vector3d();
for (int i = 0 ; i <= nb * 5; i++) {
myAlpha.setValue((float)i / (nb * 5f));
splineInterpolator.processStimulus(null);
target.getTransform(transform3d);
transform3d.get(vec);
newPoints[i] = new Point3f(vec);
}
return newPoints;
}
please note the use of a MyAlpha class which is an alpha I can force the
value of=>
/*
* Privately defined subclass of Alpha to be able to use a controlled
* version of the iterator: here the value returned is constant and set
* programmatically instead of varying with the time
*/
protected class MyAlpha extends Alpha {
float valueSet = 0f;
public MyAlpha() {
super(1,1);
}
public float value(){
return valueSet;
}
public void setValue(float v) {
valueSet = v;
}
}
Olivier Fillon Minestar Project
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-----Original Message-----
From: SMM-Mohd Nordin Zakaria <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED] <[EMAIL PROTECTED]>
Date: Sunday, February 06, 2000 4:06 PM
Subject: [JAVA3D] TCBSplinePathInterpolator
>Hi,
>
>Where can I find the documentation for TCBSplinePathInterpolator ?
>I need spline or bezier interpolation for my animation. Will
>TCBSplinePathInterpolator do the job ?
>
>thanks.
>Nordin
>
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