Add a new Evaporate effect when clearing cells

core/src/io/github/lonamiwebs/klooni/effects/EvaporateEffect.java

@@ -0,0 +1,72 @@
+package io.github.lonamiwebs.klooni.effects;
+
+
+import com.badlogic.gdx.Gdx;
+import com.badlogic.gdx.graphics.Color;
+import com.badlogic.gdx.graphics.g2d.SpriteBatch;
+import com.badlogic.gdx.math.Interpolation;
+import com.badlogic.gdx.math.MathUtils;
+import com.badlogic.gdx.math.Vector2;
+
+import io.github.lonamiwebs.klooni.game.Cell;
+
+public class EvaporateEffect implements IEffect {
+    private Vector2 pos;
+    private float originalX;
+
+    private float size;
+
+    private Color vanishColor;
+    private float vanishSize;
+    private float vanishElapsed;
+    private float driftMagnitude;
+    private float randomOffset;
+
+    private static final float UP_SPEED = 100.0f;
+    private static final float LIFETIME = 3.0f;
+    private static final float INV_LIFETIME = 1.0f / 3.0f;
+
+    public EvaporateEffect() {
+        vanishElapsed = Float.POSITIVE_INFINITY;
+    }
+
+    @Override
+    public void setInfo(Cell deadCell, Vector2 culprit) {
+        pos = deadCell.pos.cpy();
+        originalX = pos.x;
+        size = deadCell.size;
+
+        vanishSize = deadCell.size;
+        vanishColor = deadCell.getColorCopy();
+        driftMagnitude = Gdx.graphics.getWidth() * 0.05f;
+        vanishElapsed = 0;
+        randomOffset = MathUtils.random(MathUtils.PI2);
+    }
+
+    @Override
+    public void draw(SpriteBatch batch) {
+        vanishElapsed += Gdx.graphics.getDeltaTime();
+
+        // Update the size as we fade away
+        final float progress = vanishElapsed * INV_LIFETIME;
+        vanishSize = Interpolation.fade.apply(size, 0, progress);
+
+        // Fade away depending on the time
+        vanishColor.set(vanishColor.r, vanishColor.g, vanishColor.b, 1.0f - progress);
+
+        // Ghostly fade upwards, by doing a lerp from our current position to the wavy one
+        pos.x = MathUtils.lerp(
+                pos.x,
+                originalX + MathUtils.sin(randomOffset + vanishElapsed * 3f) * driftMagnitude,
+                0.3f
+        );
+        pos.y += UP_SPEED * Gdx.graphics.getDeltaTime();
+
+        Cell.draw(vanishColor, batch, pos.x, pos.y, vanishSize);
+    }
+
+    @Override
+    public boolean isDone() {
+        return vanishElapsed > LIFETIME;
+    }
+}

core/src/io/github/lonamiwebs/klooni/game/Board.java

@@ -29,6 +29,7 @@ import java.io.DataOutputStream;
 import java.io.IOException;
 
 import io.github.lonamiwebs.klooni.Klooni;
+import io.github.lonamiwebs.klooni.effects.EvaporateEffect;
 import io.github.lonamiwebs.klooni.effects.IEffect;
 import io.github.lonamiwebs.klooni.effects.VanishEffect;
 import io.github.lonamiwebs.klooni.serializer.BinSerializable;
@@ -212,7 +213,7 @@ public class Board implements BinSerializable {
             for (int i = 0; i < cellCount; ++i) {
                 if (clearedRows[i]) {
                     for (int j = 0; j < cellCount; ++j) {
-                        VanishEffect effect = new VanishEffect();
+                        IEffect effect = new EvaporateEffect();
                         effect.setInfo(cells[i][j], lastPutPiecePos);
                         effects.add(effect);
                         cells[i][j].set(-1);
@@ -224,7 +225,7 @@ public class Board implements BinSerializable {
                 if (clearedCols[j]) {
                     pan += 2f * (j - cellCount / 2) / (float)cellCount;
                     for (int i = 0; i < cellCount; ++i) {
-                        VanishEffect effect = new VanishEffect();
+                        IEffect effect = new EvaporateEffect();
                         effect.setInfo(cells[i][j], lastPutPiecePos);
                         effects.add(effect);
                         cells[i][j].set(-1);