feat: implemented LookCloseGoal

api/src/main/java/ru/dragonestia/msb3/api/entity/goal/LookCloseGoal.java

@@ -0,0 +1,83 @@
+package ru.dragonestia.msb3.api.entity.goal;
+
+import lombok.Getter;
+import lombok.Setter;
+import net.minestom.server.entity.EntityCreature;
+import net.minestom.server.entity.Player;
+import net.minestom.server.entity.ai.GoalSelector;
+import org.jetbrains.annotations.NotNull;
+
+public class LookCloseGoal extends GoalSelector {
+
+    private final static int MAX_DIST = 7 * 7;
+
+    @Setter @Getter private volatile boolean enabled = false;
+    private boolean lastSeePlayer = false;
+    @Getter private float defaultYaw;
+    @Getter private float defaultPitch;
+
+    public LookCloseGoal(@NotNull EntityCreature entityCreature) {
+        super(entityCreature);
+
+        defaultYaw = entityCreature.getPosition().yaw();
+        defaultPitch = entityCreature.getPosition().pitch();
+    }
+
+    @Override
+    public boolean shouldStart() {
+        return true;
+    }
+
+    @Override
+    public void start() {}
+
+    @Override
+    public void tick(long l) {
+        if ((l & 0b11) == 0) return;
+
+        if (!enabled) {
+            if (lastSeePlayer) {
+                entityCreature.setView(defaultYaw, defaultPitch);
+                lastSeePlayer = false;
+            }
+            return;
+        }
+
+        Player closestPlayer = null;
+        double closestDistance = Double.MAX_VALUE;
+
+        for (var player: entityCreature.getViewers()) {
+            var distance = player.getPosition().distanceSquared(entityCreature.getPosition());
+            if (distance > MAX_DIST) continue;
+
+            if (distance < closestDistance) {
+                closestDistance = distance;
+                closestPlayer = player;
+            }
+        }
+
+        if (closestPlayer != null) {
+            entityCreature.lookAt(closestPlayer);
+            lastSeePlayer = true;
+            return;
+        }
+
+        if (lastSeePlayer) {
+            entityCreature.setView(defaultYaw, defaultPitch);
+            lastSeePlayer = false;
+        }
+    }
+
+    @Override
+    public boolean shouldEnd() {
+        return false;
+    }
+
+    @Override
+    public void end() {}
+
+    public void setDefaultRotation(float yaw, float pitch) {
+        defaultYaw = yaw;
+        defaultPitch = pitch;
+    }
+}