AnimationCaptureController.java

package org.vorthmann.zome.app.impl;

import java.io.File;

import javax.vecmath.AxisAngle4f;
import javax.vecmath.Quat4d;
import javax.vecmath.Vector3f;

import org.vorthmann.ui.Controller;
import org.vorthmann.ui.DefaultController;

import com.vzome.desktop.controller.CameraController;

public class AnimationCaptureController extends DefaultController implements Controller
{
	private static final int NUM_ITERATIONS = 80;
	
	public static final String TYPE = "png";
	
	private static final String FILENAME_PATTERN = "frame%03d." + TYPE;
	
	private CameraController cameraController;
	
	private final Quat4d rotation;
		
	private final File parentDir;
	
	private int iteration;

	public AnimationCaptureController( CameraController cameraController, File directory )
	{    	
    	this .iteration = NUM_ITERATIONS;
    	double rotationRadians = 2 * Math.PI / NUM_ITERATIONS;

		this.cameraController = cameraController;
		Vector3f viewRotAxis = new Vector3f( 0f, 1.618f, 1f );
		this .cameraController .mapViewToWorld( viewRotAxis );
		this .rotation = new Quat4d();
		this .rotation .set( new AxisAngle4f( viewRotAxis, (float) rotationRadians ) );
			
		this .parentDir = directory .isDirectory()? directory : directory .getParentFile();
	}

	public int getImageSize()
	{
		return -1;
	}

	public void rotate()
	{
		this .cameraController .addViewpointRotation( this .rotation );
	}

	public File nextFile()
	{
		String fileName = String .format( FILENAME_PATTERN, -- this .iteration );
		return new File( this .parentDir, fileName );
	}

	public boolean finished()
	{
		return this .iteration == 0;
	}

}