v.0.5.2

src/main/java/bigtrace/BigTraceActions.java

@@ -12,14 +12,19 @@
 import net.imglib2.type.NativeType;
 import net.imglib2.type.numeric.RealType;
 
+
 import org.scijava.ui.behaviour.io.InputTriggerConfig;
 import org.scijava.ui.behaviour.util.Actions;
+import org.scijava.ui.behaviour.util.Behaviours;
 
 import bigtrace.geometry.Line3D;
+import bigtrace.gui.Rotate3DViewerStyle;
 import bigtrace.rois.LineTrace3D;
 import bigtrace.rois.Roi3D;
 import bigtrace.rois.RoiManager3D;
 import bigtrace.volume.VolumeMisc;
+import bvvpg.vistools.BvvHandle;
+
 
 public class BigTraceActions < T extends RealType< T > & NativeType< T > > 
 {
@@ -28,12 +33,14 @@ public class BigTraceActions < T extends RealType< T > & NativeType< T > >
 	final Actions actions;
 
 	public BigTraceActions(final BigTrace<T> bt_)
-	{
-
+	{		
 		bt = bt_;
 		actions = new Actions( new InputTriggerConfig() );
 		installActions();
+		installBehaviors();
 	}
+
+
 	public void installActions()
 	{
 		//final Actions actions = new Actions( new InputTriggerConfig() );
@@ -84,6 +91,24 @@ public void installActions()
 
 
 	}
+
+	/** install smoother rotation **/
+	void installBehaviors()
+	{
+		final BvvHandle handle = bt.bvv_main.getBvvHandle();
+		//change drag rotation for navigation "3D Viewer" style
+		final Rotate3DViewerStyle dragRotate = new Rotate3DViewerStyle( 0.75, handle);
+		final Rotate3DViewerStyle dragRotateFast = new Rotate3DViewerStyle( 2.0, handle);
+		final Rotate3DViewerStyle dragRotateSlow = new Rotate3DViewerStyle( 0.1, handle);
+
+		final Behaviours behaviours = new Behaviours( new InputTriggerConfig() );
+		behaviours.behaviour( dragRotate, "drag rotate", "button1" );
+		behaviours.behaviour( dragRotateFast, "drag rotate fast", "shift button1" );
+		behaviours.behaviour( dragRotateSlow, "drag rotate slow", "ctrl button1" );
+		behaviours.install( handle.getTriggerbindings(), "BigTrace Behaviours" );
+	}
+
+
 	/** find a brightest pixel in the direction of a click
 	 *  and add a new 3D point to active ROI OR
 	 *  start a new ROI (if none selected)

src/main/java/bigtrace/gui/Rotate3DViewerStyle.java

@@ -0,0 +1,78 @@
+package bigtrace.gui;
+
+
+import net.imglib2.realtransform.AffineTransform3D;
+
+import org.scijava.ui.behaviour.DragBehaviour;
+
+import bvvpg.vistools.BvvHandle;
+
+public class Rotate3DViewerStyle implements DragBehaviour
+{
+	/**
+	 * Coordinates where mouse dragging started.
+	 */
+	private double oX, oY;
+
+	private final double speed;
+	/**
+	 * One step of rotation (radian).
+	 */
+	final private static double step = Math.PI / 180;
+
+	private int centerX = 0, centerY = 0;
+	final BvvHandle bvvHandle;
+	private final AffineTransform3D transform = new AffineTransform3D();
+	private final AffineTransform3D affineDragStart = new AffineTransform3D();
+	private final AffineTransform3D affineDragCurrent = new AffineTransform3D();
+
+	public Rotate3DViewerStyle( final double speed, BvvHandle bvvHandle_)
+	{		
+		this.bvvHandle = bvvHandle_;
+		this.speed = speed;
+	}
+
+	@Override
+	public void init( final int x, final int y )
+	{
+		oX = x;
+		oY = y;
+		centerX = bvvHandle.getViewerPanel().getDisplay().getWidth()/2;
+		centerY = bvvHandle.getViewerPanel().getDisplay().getHeight()/2;
+		//affineDragStart.set(bvvHandle.getViewerPanel().state().getViewerTransform());
+		//transform.get( affineDragStart );
+	}
+
+	@Override
+	public void drag( final int x, final int y )
+	{
+		final double dX = oX - x;
+		final double dY = oY - y;
+
+		affineDragCurrent.set( affineDragStart );
+
+		// center shift
+		affineDragCurrent.set( affineDragCurrent.get( 0, 3 ) - centerX, 0, 3 );
+		affineDragCurrent.set( affineDragCurrent.get( 1, 3 ) - centerY, 1, 3 );
+		final double v = step * speed;
+		affineDragCurrent.rotate( 0, -dY * v );
+		affineDragCurrent.rotate( 1, dX * v );
+
+		// center un-shift
+		affineDragCurrent.set( affineDragCurrent.get( 0, 3 ) + centerX, 0, 3 );
+		affineDragCurrent.set( affineDragCurrent.get( 1, 3 ) + centerY, 1, 3 );
+
+		//does not depend on how far we from initial click
+		oX = x;
+		oY = y;
+
+		transform.set( bvvHandle.getViewerPanel().state().getViewerTransform() );
+		transform.preConcatenate( affineDragCurrent );
+		bvvHandle.getViewerPanel().state().setViewerTransform(transform);
+	}
+
+	@Override
+	public void end( final int x, final int y )
+	{}
+
+}