annotate src/samer/j3d/ViewGroup.java @ 8:5e3cbbf173aa tip

Reorganise some more

/**
		ViewGroup.java

		A View branch group containing a ViewPlatform
		and associated Views, Canvas3Ds and Windows to
		hold the canvases.  Can be added dynamically
		to a live universe.

		Parameters:
			initial placement
			autostart canvas?
			autostart view?
			keyboard navigator?
			various view policies

		Requirements:
			must be placable (hence TransformGroup and ViewPlatform)
			must be Node so addable to universe
			renderable:
				view.renderOnce()
				view.startView()
				view.stopView()
				canvas.startRenderer()
				canvas.stopRenderer()
				... ?
			disposable: cleans up properly
			must have accessible View and Canvas objects
			must manage multiple canvases for stereo

 */
package samer.j3d;

import samer.core.*;
import javax.media.j3d.*;
import javax.vecmath.*;


public class ViewGroup extends BranchGroup
{
	TransformGroup	VT;
	ViewPlatform		VP;
	ViewBase			V;

	public void lookFrom(Point3d eye, Vector3d up)
	{
		// view platform placement
		Transform3D		t=new Transform3D();
		t.lookAt(eye, new Point3d(0,0,0), up);
		t.invert();
		VT.setTransform(t);
	}

	public ViewGroup()
	{
		VT=new TransformGroup();
		VP=new ViewPlatform();
		lookFrom(
			new Point3d(X.doubleArray(Shell.getString("lookfrom","(0,1,8)"),3)),
			new Vector3d(0,1,0)
		);
		VT.addChild(VP);
		addChild(VT);

		// addChild(new FPS(200));
		// setCapability(ALLOW_DETACH);
		// setCapability(ALLOW_CHILDREN_WRITE);
	}

	public void attachView(View v) { v.attachViewPlatform(VP); }
}