From 0055d1c508cf0389afc54e520d23a620ba985161 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Bart=C5=82omiej=20Przemys=C5=82aw=20Pluta?=
 <noreply.git@mx.bartlomiejpluta.com>
Date: Mon, 22 Mar 2021 16:06:02 +0100
Subject: [PATCH] Create BulletAnimationRunner

---
 .../lib/animation/BulletAnimationRunner.java  | 152 ++++++++++++++++++
 1 file changed, 152 insertions(+)
 create mode 100644 api/src/main/java/com/bartlomiejpluta/base/lib/animation/BulletAnimationRunner.java

diff --git a/api/src/main/java/com/bartlomiejpluta/base/lib/animation/BulletAnimationRunner.java b/api/src/main/java/com/bartlomiejpluta/base/lib/animation/BulletAnimationRunner.java
new file mode 100644
index 00000000..b0560726
--- /dev/null
+++ b/api/src/main/java/com/bartlomiejpluta/base/lib/animation/BulletAnimationRunner.java
@@ -0,0 +1,152 @@
+package com.bartlomiejpluta.base.lib.animation;
+
+import com.bartlomiejpluta.base.api.animation.Animation;
+import com.bartlomiejpluta.base.api.context.Context;
+import com.bartlomiejpluta.base.api.entity.Entity;
+import com.bartlomiejpluta.base.api.map.layer.base.Layer;
+import com.bartlomiejpluta.base.api.map.layer.object.ObjectLayer;
+import com.bartlomiejpluta.base.api.move.Direction;
+import com.bartlomiejpluta.base.util.path.Path;
+import org.joml.Vector2fc;
+import org.joml.Vector2i;
+
+import java.util.function.Consumer;
+
+import static java.util.Objects.requireNonNull;
+
+public class BulletAnimationRunner implements AnimationRunner {
+   private static final Path<Animation> UP = new Path<Animation>().move(Direction.UP);
+   private static final Path<Animation> DOWN = new Path<Animation>().move(Direction.DOWN);
+   private static final Path<Animation> LEFT = new Path<Animation>().move(Direction.LEFT);
+   private static final Path<Animation> RIGHT = new Path<Animation>().move(Direction.RIGHT);
+
+   private final String animationUid;
+
+   private Integer range;
+   private Integer repeat = 1;
+   private float scale = 1.0f;
+   private int delay = 0;
+   private float animationSpeed = 0.05f;
+   private float speed = 0.05f;
+   private float rotation = 0f;
+   private Direction direction;
+   private Path<Animation> path;
+   private Consumer<Entity> onHit;
+   private float offsetX = 0;
+   private float offsetY = 0;
+
+   public BulletAnimationRunner(String animationUid) {
+      this.animationUid = animationUid;
+   }
+
+   public BulletAnimationRunner onHit(Consumer<Entity> runnable) {
+      this.onHit = requireNonNull(runnable);
+      return this;
+   }
+
+   public BulletAnimationRunner range(int n) {
+      this.range = n;
+      return this;
+   }
+
+   public BulletAnimationRunner infiniteRange() {
+      this.range = null;
+      return this;
+   }
+
+   public BulletAnimationRunner repeat(int n) {
+      this.repeat = n;
+      return this;
+   }
+
+   public BulletAnimationRunner infinite() {
+      this.repeat = null;
+      return this;
+   }
+
+   public BulletAnimationRunner scale(float scale) {
+      this.scale = scale;
+      return this;
+   }
+
+   public BulletAnimationRunner delay(int delay) {
+      this.delay = delay;
+      return this;
+   }
+
+   public BulletAnimationRunner animationSpeed(float speed) {
+      this.animationSpeed = speed;
+      return this;
+   }
+
+   public BulletAnimationRunner speed(float speed) {
+      this.speed = speed;
+      return this;
+   }
+
+   public BulletAnimationRunner rotation(float rotation) {
+      this.rotation = rotation;
+      return this;
+   }
+
+   public BulletAnimationRunner offset(float x, float y) {
+      this.offsetX = x;
+      this.offsetY = y;
+      return this;
+   }
+
+   public BulletAnimationRunner direction(Direction direction) {
+      this.direction = direction;
+      this.path = switch (direction) {
+         case UP -> UP;
+         case DOWN -> DOWN;
+         case LEFT -> LEFT;
+         case RIGHT -> RIGHT;
+      };
+
+      return this;
+   }
+
+   @Override
+   public void run(Context context, Layer layer, Vector2fc origin) {
+      var animation = new BulletAnimation(context.createAnimation(animationUid), delay, direction, onHit);
+      animation.setPosition(origin.x() + offsetX, origin.y() + offsetY);
+      animation.setScale(scale);
+      animation.setAnimationSpeed(animationSpeed);
+      animation.setSpeed(speed);
+      animation.setRotation(rotation);
+      animation.setRepeat(repeat);
+      animation.setPositionOffset(offsetX, offsetY);
+
+      animation.followPath(path, range, true, true);
+
+      layer.pushAnimation(animation);
+   }
+
+   private static class BulletAnimation extends DelayedAnimation {
+      private final Direction direction;
+      private final Consumer<Entity> action;
+
+      public BulletAnimation(Animation animation, int delay, Direction direction, Consumer<Entity> action) {
+         super(animation, delay);
+         this.direction = direction;
+         this.action = action;
+      }
+
+      @Override
+      public void onFinish(Layer layer) {
+         if (action != null) {
+            var target = getCoordinates().add(direction.vector, new Vector2i());
+            if (layer instanceof ObjectLayer) {
+               for (var entity : ((ObjectLayer) layer).getEntities()) {
+                  var movement = entity.getMovement();
+                  if (entity.getCoordinates().equals(target) || movement != null && movement.getTo().equals(target)) {
+                     action.accept(entity);
+                     return;
+                  }
+               }
+            }
+         }
+      }
+   }
+}