bundles/addons/org.eclipse.apogy.addons.sensors.fov.ui.jme3/src/org/eclipse/apogy/addons/sensors/fov/ui/jme3/utils/RectangularFrustrumFieldOfViewImageProjectorControl.java

package org.eclipse.apogy.addons.sensors.fov.ui.jme3.utils;
/*******************************************************************************
 * Copyright (c) 2018 Agence spatiale canadienne / Canadian Space Agency.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 * 	 	 Pierre Allard - initial API and implementation
 * 	 	 Regent L'Archeveque
 * SPDX-License-Identifier: EPL-1.0
 *******************************************************************************/

import java.awt.image.BufferedImage;

import org.eclipse.apogy.addons.sensors.fov.RectangularFrustrumFieldOfView;
import org.eclipse.apogy.addons.sensors.fov.ui.jme3.scene_objects.ProjectorData;
import org.eclipse.apogy.common.images.AbstractEImage;
import org.eclipse.apogy.common.images.EImagesUtilities;
import org.eclipse.apogy.common.topology.ui.jme3.JME3Application;
import org.eclipse.swt.graphics.RGB;

import com.jme3.renderer.Camera;

public class RectangularFrustrumFieldOfViewImageProjectorControl
		extends AbstractFieldOfViewImageProjectorControl<RectangularFrustrumFieldOfView> {

	public RectangularFrustrumFieldOfViewImageProjectorControl(JME3Application jme3Application,
			RectangularFrustrumFieldOfView fieldOfView) {
		super(jme3Application, fieldOfView);
	}

	@Override
	public float getHorizontalFOVAngleDegrees() {
		return (float) Math.toDegrees(this.fieldOfView.getHorizontalFieldOfViewAngle());
	}

	@Override
	public float getTextureHtoVRatio() {
		float ratio = 1.0f;
		if (this.fieldOfView != null) {
			if (this.fieldOfView.getHorizontalFieldOfViewAngle() > 0
					&& this.fieldOfView.getVerticalFieldOfViewAngle() > 0) {
				ratio = (float) (this.fieldOfView.getHorizontalFieldOfViewAngle()
						/ this.fieldOfView.getVerticalFieldOfViewAngle());
			}
		}

		return ratio;
	}

	@Override
	public BufferedImage getProjectedImage() {
		int width = 256;
		int height = Math.round(width * getTextureHtoVRatio());
		AbstractEImage transparentImage = EImagesUtilities.INSTANCE.createTransparentImage(width, height);

		RGB projColor = getProjectionColor();
		AbstractEImage borderedImage = EImagesUtilities.INSTANCE.addBorder(transparentImage, 4, projColor.red,
				projColor.green, projColor.blue);
		return borderedImage.asBufferedImage();
	}

	@Override
	public void updateProjectorFOVSettings() {
		ProjectorData projectorData = getProjectorData();

		// Updates the texture.
		projectorData.projector.setProjectiveTextureMap(createTexture());

		Camera projectorCamera = projectorData.projector.getProjectorCamera();
		projectorCamera.setLocation(getProjectorLocation());
		projectorCamera.setRotation(getProjectorRotation());

		if (getHorizontalFOVAngleDegrees() > 0) {
			projectorCamera.setFrustumPerspective(getHorizontalFOVAngleDegrees(), 1.0f / getTextureHtoVRatio(), 1f, 5f);
		} else {
			projectorCamera.setFrustumPerspective(0.1f, 1.0f / getTextureHtoVRatio(), 1f, 5f);
		}
	}
}