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package javafx.scene;

import com.sun.javafx.geom.PickRay;
import com.sun.javafx.geom.Vec3d;
import com.sun.javafx.geom.transform.Affine3D;
import com.sun.javafx.geom.transform.GeneralTransform3D;
import com.sun.javafx.sg.PGNode;
import com.sun.javafx.sg.PGParallelCamera;
import com.sun.javafx.tk.Toolkit;

/**
 * Specifies a parallel camera for rendering a scene without perspective correction. 
 * 
 * 

If a scene contains only 2D transforms, then the following details are not * relevant. * This camera defines a viewing volume for a parallel (orthographic) projection; * a rectangular box. This camera is always located at center of the window and * looks along the positive z-axis. The coordinate system defined by this camera * has its origin in the upper left corner of the panel with the Y-axis pointing * down and the Z axis pointing away from the viewer (into the screen). The * units are in pixel coordinates. * * @since JavaFX 2.0 */ public class ParallelCamera extends Camera { @Override Camera copy() { ParallelCamera c = new ParallelCamera(); c.setNearClip(getNearClip()); c.setFarClip(getFarClip()); return c; } /** * @treatAsPrivate implementation detail * @deprecated This is an internal API that is not intended for use and will be removed in the next version */ @Deprecated @Override protected PGNode impl_createPGNode() { PGParallelCamera pgCamera = Toolkit.getToolkit().createPGParallelCamera(); pgCamera.setNearClip((float) getNearClip()); pgCamera.setFarClip((float) getFarClip()); return pgCamera; } @Override final PickRay computePickRay(double x, double y, PickRay pickRay) { return PickRay.computeParallelPickRay(x, y, getCameraTransform(), //TODO: use actual clips after rendering uses them Double.NEGATIVE_INFINITY, Double.POSITIVE_INFINITY, pickRay); } @Override void computeProjectionTransform(GeneralTransform3D proj) { final double viewWidth = getViewWidth(); final double viewHeight = getViewHeight(); final double halfDepth = (viewWidth > viewHeight) ? viewWidth / 2.0 : viewHeight / 2.0; proj.ortho(0.0, viewWidth, viewHeight, 0.0, -halfDepth, halfDepth); } @Override void computeViewTransform(Affine3D view) { view.setToIdentity(); } @Override Vec3d computePosition(Vec3d position) { if (position == null) { position = new Vec3d(); } position.set(0.0, 0.0, -1.0); return position; } }





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