Piece : add getShootingPoint() and getImpactPoint()

1 files changed, 21 insertions, 0 deletions

diff --git a/core/src/ch/asynk/gdx/boardgame/Piece.java b/core/src/ch/asynk/gdx/boardgame/Piece.java
index 9e253e4..6b7f2b4 100644
--- a/core/src/ch/asynk/gdx/boardgame/Piece.java
+++ b/core/src/ch/asynk/gdx/boardgame/Piece.java
@@ -5,6 +5,8 @@ import java.lang.Math;
 import com.badlogic.gdx.graphics.Texture;
 import com.badlogic.gdx.graphics.g2d.Sprite;
 import com.badlogic.gdx.math.Vector3;
+import com.badlogic.gdx.math.Vector2;
+import com.badlogic.gdx.math.MathUtils;
 
 import ch.asynk.gdx.boardgame.Drawable;
 import ch.asynk.gdx.boardgame.Orientation;
@@ -53,4 +55,23 @@ public class Piece extends Sprite implements Drawable, Positionable, Rotable, Sc
     {
         return (Orientation.fromR(getRotation()) == orientation);
     }
+
+    public void getShootingPoint(Vector2 v, Piece target)
+    {
+        float x0 = getX();
+        float y0 = getY();
+        float x1 = target.getX();
+        float y1 = target.getY();
+
+        float r = (float) (MathUtils.atan2(y1 - y0, x1 - x0));
+        x0 += (Math.cos(r) + 1f) * (getWidth() / 2f);
+        y0 += (Math.sin(r) + 1f) * (getHeight() / 2f);
+
+        v.set(x0, y0);
+    }
+
+    public void getImpactPoint(Vector2 v)
+    {
+        v.set(getX()+ (getWidth() / 2f), getY() + (getHeight() / 2f));
+    }
 }