Lower the bar for mouse movement on the photo renderer.

Map X & Y to view alt & az. It gimble locks, it inverts when you are
upside down, but it actually mostly works.

swing/src/net/sf/openrocket/gui/figure3d/photo/PhotoPanel.java

@@ -76,7 +76,6 @@ public class PhotoPanel extends JPanel implements GLEventListener {
 
 	private RocketRenderer rr;
 	private PhotoSettings p;
-	private Trackball trackball = new Trackball();
 
 	void setDoc(final OpenRocketDocument doc) {
 		((GLAutoDrawable) canvas).invoke(false, new GLRunnable() {
@@ -204,21 +203,14 @@ public class PhotoPanel extends JPanel implements GLEventListener {
 				final double y1 = (2 * lastY - height) / height;
 				final double x2 = (width - 2 * e.getX()) / width;
 				final double y2 = (2 * e.getY() - height) / height;
-				trackball.swipe(x1, y1, x2, y2, p.getViewAz(), p.getViewAlt());
 				
-				p.setPitchYawRoll(trackball.getPitch(), trackball.getYaw(), trackball.getRoll());
+				p.setViewAltAz(p.getViewAlt() - (y1-y2), p.getViewAz() + (x1-x2));
 
 				lastX = e.getX();
 				lastY = e.getY();
 			}
 		};
 
-		p.addChangeListener(new StateChangeListener() {
-			@Override
-			public void stateChanged(EventObject e) {
-				trackball.setPitchYawRoll(p.getPitch(), p.getYaw(), p.getRoll());
-			}
-		});
 		canvas.addMouseMotionListener(a);
 		canvas.addMouseListener(a);
 	}

swing/src/net/sf/openrocket/gui/figure3d/photo/PhotoSettings.java

@@ -86,6 +86,11 @@ public class PhotoSettings extends AbstractChangeSource implements FlameSettings
 		return viewAlt;
 	}
 	
+	public void setViewAltAz(double viewAlt, double viewAz){
+		this.viewAz = viewAz;
+		this.viewAlt = viewAlt;
+		fireChangeEvent();
+	}
 	public void setViewAlt(double viewAlt) {
 		this.viewAlt = viewAlt;
 		fireChangeEvent();

swing/src/net/sf/openrocket/gui/figure3d/photo/Trackball.java

@@ -1,41 +0,0 @@
-package net.sf.openrocket.gui.figure3d.photo;
-
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
-
-public class Trackball {
-	
-	@SuppressWarnings("unused")
-	private static final Logger log = LoggerFactory.getLogger(Trackball.class);
-	
-	private double pitch, yaw, roll;
-	
-	public Trackball() {
-		
-	}
-	
-	public void setPitchYawRoll(final double pitch, final double yaw, final double roll) {
-		this.pitch = pitch;
-		this.yaw = yaw;
-		this.roll = roll;
-	}
-	
-	public double getPitch() {
-		return pitch;
-	}
-	
-	public double getYaw() {
-		return yaw;
-	}
-	
-	public double getRoll() {
-		return roll;
-	}
-	
-	public void swipe
-			(final double p1x, final double p1y, final double p2x, final double p2y, final double vAz, final double vAlt) {
-		
-	}
-	
-}