Flip to opposite side (#8)

* Add flip to opposite side button

* Allow flip of heading and velocity vectors

Author: jlbabilino

app/src/main/java/org/team2363/helixnavigator/document/DocumentActions.java

@@ -47,6 +47,9 @@
 import javafx.scene.input.MouseEvent;
 import javafx.scene.input.ScrollEvent;
 import javafx.scene.transform.Rotate;
+import javafx.scene.transform.Scale;
+import javafx.scene.transform.Transform;
+import javafx.scene.transform.Translate;
 
 public class DocumentActions {
 
@@ -465,6 +468,17 @@ public void rotateSelection180() {
         }
     }
 
+    public void flipObjectsToOppositeSide() {
+        if (documentManager.getIsDocumentOpen() && documentManager.getDocument().isPathSelected()) {
+            HDocument document = documentManager.getDocument();
+            HFieldImage fieldImage = document.getFieldImage();
+            Scale mirrorTrans = new Scale(-1, 1);
+            Translate flipTrans = new Translate(fieldImage.getFieldAreaWidth(), 0.0);
+            Transform totalTrans = flipTrans.createConcatenation(mirrorTrans);
+            documentManager.getDocument().getSelectedPath().transformSelectedElementsRelative(totalTrans);
+        }
+    }
+
     private void insertWaypoint(int index, HWaypoint waypoint) {
         documentManager.getDocument().getSelectedPath().getWaypoints().add(index, waypoint);
     }

app/src/main/java/org/team2363/helixnavigator/document/field/image/HDefaultFieldImage.java

@@ -71,6 +71,19 @@ public String getName() {
         return game;
     }
 
+    @Override
+    public double getFieldAreaWidth() {
+        Quantity<Length> widthQuan = Quantities.getQuantity(fieldSize.width, fieldUnit.unit);
+        Quantity<Length> widthQuanConv = widthQuan.to(SI.METRE);
+        return widthQuanConv.getValue().doubleValue();
+    }
+    @Override
+    public double getFieldAreaHeight() {
+        Quantity<Length> heightQuan = Quantities.getQuantity(fieldSize.height, fieldUnit.unit);
+        Quantity<Length> heightQuanConv = heightQuan.to(SI.METRE);
+        return heightQuanConv.getValue().doubleValue();
+    }
+
     @Override
     public double getImageRes() {
         return imageRes;

app/src/main/java/org/team2363/helixnavigator/document/field/image/HFieldImage.java

@@ -17,6 +17,9 @@ public interface HFieldImage {
      */
     public String getName();
 
+    public double getFieldAreaWidth();
+    public double getFieldAreaHeight();
+
     /**
      * @return the resolution of image, in meters per pixel
      */

app/src/main/java/org/team2363/helixnavigator/document/field/image/HReferenceFieldImage.java

@@ -30,6 +30,16 @@ public String getName() {
         return fieldImage.getName();
     }
 
+    @Override
+    public double getFieldAreaWidth() {
+        return fieldImage.getFieldAreaWidth();
+    }
+
+    @Override
+    public double getFieldAreaHeight() {
+        return fieldImage.getFieldAreaHeight();
+    }
+
     @Override
     public double getImageRes() {
         return fieldImage.getImageRes();

app/src/main/java/org/team2363/helixnavigator/document/timeline/HCustomWaypoint.java

@@ -17,6 +17,7 @@
 import javafx.beans.property.SimpleBooleanProperty;
 import javafx.beans.property.SimpleDoubleProperty;
 import javafx.beans.property.SimpleIntegerProperty;
+import javafx.geometry.Point2D;
 import javafx.scene.transform.Transform;
 
 public class HCustomWaypoint extends HWaypoint {
@@ -43,7 +44,22 @@ public HCustomWaypoint() {
     @Override
     public void transformRelative(Transform transform) {
         super.transformRelative(transform);
-        double deltaAngle = Math.atan2(transform.getMyx(), transform.getMxx());
+
+        Point2D curBase = new Point2D(getX(), getY());
+        Point2D curHeadTip = curBase.add(new Point2D(Math.cos(getHeading()), Math.sin(getHeading())));
+        Point2D curVelocityTip = curBase.add(new Point2D(getVelocityX(), getVelocityY()));
+
+        Point2D newBase = transform.transform(curBase);
+        Point2D newVelTip = transform.transform(curVelocityTip);
+        Point2D newVelocity = newVelTip.subtract(newBase);
+
+        Point2D newHeadTip = transform.transform(curHeadTip);
+        Point2D newHead = newHeadTip.subtract(newBase);
+
+        setVelocityX(newVelocity.getX());
+        setVelocityY(newVelocity.getY());
+
+        double deltaAngle = Math.atan2(newHead.getY(), newHead.getX()) - getHeading();
         setHeading(getHeading() + deltaAngle);
     }
 

app/src/main/java/org/team2363/helixnavigator/ui/menu/edit/EditMenu.java

@@ -24,6 +24,7 @@ public class EditMenu extends Menu {
     private final Rotate90ClockwiseMenuItem rotate90ClockwiseMenuItem;
     private final Rotate90CounterclockwiseMenuItem rotate90CounterclockwiseMenuItem;
     private final Rotate180MenuItem rotate180MenuItem;
+    private final FlipToOppositeSideMenuItem flipToOppositeSideMenuItem;
 
     public EditMenu(DocumentManager documentManager) {
         this.documentManager = documentManager;
@@ -41,6 +42,7 @@ public EditMenu(DocumentManager documentManager) {
         rotate90ClockwiseMenuItem = new Rotate90ClockwiseMenuItem(this.documentManager);
         rotate90CounterclockwiseMenuItem = new Rotate90CounterclockwiseMenuItem(this.documentManager);
         rotate180MenuItem = new Rotate180MenuItem(this.documentManager);
+        flipToOppositeSideMenuItem = new FlipToOppositeSideMenuItem(this.documentManager);
 
         getItems().add(undoMenuItem);
         getItems().add(redoMenuItem);
@@ -57,5 +59,6 @@ public EditMenu(DocumentManager documentManager) {
         getItems().add(rotate90ClockwiseMenuItem);
         getItems().add(rotate90CounterclockwiseMenuItem);
         getItems().add(rotate180MenuItem);
+        getItems().add(flipToOppositeSideMenuItem);
     }
 }

app/src/main/java/org/team2363/helixnavigator/ui/menu/edit/FlipToOppositeSideMenuItem.java

@@ -0,0 +1,23 @@
+package org.team2363.helixnavigator.ui.menu.edit;
+
+import org.team2363.helixnavigator.document.DocumentManager;
+
+import javafx.event.ActionEvent;
+import javafx.scene.control.MenuItem;
+
+public class FlipToOppositeSideMenuItem extends MenuItem {
+
+    private final DocumentManager documentManager;
+
+    public FlipToOppositeSideMenuItem(DocumentManager documentManager) {
+        this.documentManager = documentManager;
+        setText("Flip Objects to Opposite Side");
+        // setAccelerator(KeyCombination.keyCombination("shortcut+RIGHT"));
+        setOnAction(this::action);
+        disableProperty().bind(this.documentManager.isDocumentOpenProperty().not());
+    }
+
+    public void action(ActionEvent event) {
+        documentManager.actions().flipObjectsToOppositeSide();
+    }
+}