Hi:
I have some problems at "PositionPathInterpolator"
the codes of my program is below :
public BranchGroup createView()
{
BranchGroup BG= new BranchGroup();
PhysicalBody body= new PhysicalBody();
PhysicalEnvironment environment= new PhysicalEnvironment();
View view= new View();
ViewPlatform VP=new ViewPlatform();
view.addCanvas3D(canvas3D);
view.setPhysicalBody(body);
view.setPhysicalEnvironment(environment);
view.setProjectionPolicy(View.PERSPECTIVE_PROJECTION);
view.setBackClipDistance(10000.0);
view.attachViewPlatform(VP);
/* -------------- Step 1
---------------------------------------------------- */
Transform3D TF = new Transform3D();
Transform3D t1 = new Transform3D();
TF.set(new Vector3d(0.0, 5.0, 0.0)); /// change the oriented
point
t1.rotY(Math.PI/2); /// rotate the view axis
TF.mul(t1);
TransformGroup TG = new TransformGroup(TF);
/* -------------- Step 1
---------------------------------------------------- */
TG.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);
TG.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
/*----------------- Step 2
---------------------------------------------------*/
KeyNavigatorBehavior keyNavBeh = new KeyNavigatorBehavior(TG);
keyNavBeh.setSchedulingBounds(new BoundingSphere(new
Point3d(),1000.0));
BG.addChild(keyNavBeh);
/*----------------- Step 2
---------------------------------------------------*/
/*----------------- Step 3
---------------------------------------------------*/
Alpha alpha = new Alpha(-1, 10000);
Transform3D axisOfRotPos = new Transform3D();
AxisAngle4f axis = new AxisAngle4f(1.0f,0.0f,0.0f,0.0f);
axisOfRotPos.set(axis);
float[] knots = {0.0f, 0.33f, 0.66f,1.0f};
Point3f[] positions = new Point3f[4];
positions[0]= new Point3f(30.0f,5.0f,20.0f);
positions[1]= new Point3f(-10.0f,5.0f,10.0f);
positions[2]= new Point3f(-20.0f,5.0f,20.0f);
positions[3]= new Point3f(-30.0f,5.0f,30.0f);
PositionPathInterpolator PosPath = new
PositionPathInterpolator(alpha, TG, axisOfRotPos, knots, positions);
PosPath.setSchedulingBounds(new BoundingSphere());
BG.addChild(PosPath);
/*----------------- Step 3
---------------------------------------------------*/
BG.addChild(TG);
TG.addChild(VP);
BG.compile();
return BG;
}
"Step1" : for translating and rotating the view coordinate
"Step2" : for setting the "KeyNavigatorBehavior"
"Step3" : for using "PositionPathInterpolator"
Question1 :
if I add "Step1" and "Step2" in my program and run it, the
program is well --- it means that "Step1" and "Step2" are working
together!!
but when I add "Step1" and "Step3" in my program the
program and run it, the result is :
Initially, "Step1" is running, but when the "Step3" is
running, the "Step1" isn't working ---
it means that Step3 and Step1 aren't working together,
"PosPath" is working at the original coordinate.
how do I get it work together with "Step1" and "Step3" ?
Question2 :
the Constructor of PositionPathInterpolator is :
Public PositionPathInterpolator(Alpha alpha,TransformGroup
target,
Transform3D
axisOfTranslation,float[] knots,Point3f[] positions)
What is the purpose of the "Transform3D axisOfTranslation"
?
and How to give the value of "Transform3D
axisOfTranslation" ?
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