v0.3.0: added Ethereal Chains

src/com/shatteredpixel/shatteredpixeldungeon/effects/Chains.java

@@ -0,0 +1,84 @@
+package com.shatteredpixel.shatteredpixeldungeon.effects;
+
+import com.shatteredpixel.shatteredpixeldungeon.DungeonTilemap;
+import com.watabou.noosa.Game;
+import com.watabou.noosa.Group;
+import com.watabou.noosa.Image;
+import com.watabou.utils.Callback;
+import com.watabou.utils.PointF;
+
+/**
+ * Created by Evan on 23/05/2015.
+ */
+public class Chains extends Group {
+
+	private static final double A = 180 / Math.PI;
+
+	private float spent = 0f;
+	private float duration;
+
+	private Callback callback;
+
+	private Image[] chains;
+	private int numChains;
+	private float distance;
+	private float rotation = 0;
+
+	private PointF from, to;
+
+	public Chains(int from, int to, Callback callback){
+		this(DungeonTilemap.tileCenterToWorld(from),
+				DungeonTilemap.tileCenterToWorld(to),
+				callback);
+	}
+
+	public Chains(PointF from, PointF to, Callback callback){
+		super();
+
+		this.callback = callback;
+
+		this.from = from;
+		this.to = to;
+
+		float dx = to.x - from.x;
+		float dy = to.y - from.y;
+		distance = (float)Math.hypot(dx, dy);
+
+
+		duration = distance/300f + 0.1f;
+
+		rotation = (float)(Math.atan2( dy, dx ) * A) + 90f;
+
+		numChains = Math.round(distance/6f)+1;
+
+		chains = new Image[numChains];
+		for (int i = 0; i < chains.length; i++){
+			chains[i] = new Image(Effects.get(Effects.Type.CHAIN));
+			chains[i].angle = rotation;
+			chains[i].origin.set( chains[i].width()/ 2, chains[i].height() );
+			add(chains[i]);
+		}
+	}
+
+	@Override
+	public void update() {
+		if ((spent += Game.elapsed) > duration) {
+
+			killAndErase();
+			if (callback != null) {
+				callback.call();
+			}
+
+		} else {
+			float dx = to.x - from.x;
+			float dy = to.y - from.y;
+			for (int i = 0; i < chains.length; i++) {
+				chains[i].center(new PointF(
+						from.x + ((dx * (i / (float)chains.length)) * (spent/duration)),
+						from.y + ((dy * (i / (float)chains.length)) * (spent/duration))
+				));
+			}
+		}
+	}
+
+}

src/com/shatteredpixel/shatteredpixeldungeon/effects/Effects.java

@@ -27,6 +27,7 @@ public class Effects {
 		LIGHTNING,
 		WOUND,
 		EXCLAMATION,
+		CHAIN,
 		DEATH_RAY,
 		LIGHT_RAY,
 		HEALTH_RAY
@@ -47,6 +48,9 @@ public class Effects {
 			case EXCLAMATION:
 				icon.frame(icon.texture.uvRect(0, 16, 6, 25));
 				break;
+			case CHAIN:
+				icon.frame(icon.texture.uvRect(6, 16, 11, 22));
+				break;
 			case DEATH_RAY:
 				icon.frame(icon.texture.uvRect(16, 16, 32, 24));
 				break;