Merge branch 'enemyHorizontal' into 'master'

enemy fixes

See merge request !28

Assets/Scripts/Enemy/BaseEnemy.cs

+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+public class BaseEnemy : MonoBehaviour {
+
+    public float speed = 2f;
+    Rigidbody2D body;
+    protected SpriteRenderer sr;
+    protected float startMoveTime;
+
+    public Transform rightCollisionPos;
+    public Transform leftCollisionPos;
+
+    void Start()
+    {
+        body = GetComponent<Rigidbody2D>();
+        sr = GetComponent<SpriteRenderer>();
+        startMoveTime = Time.time + .4f;
+    }
+
+    protected void Move(Vector2 dir, bool isFlipped)
+    {
+        body.transform.Translate((isFlipped ? -dir:dir) * speed * Time.deltaTime);
+    }
+	
+    protected bool CheckCollision(Vector2 dir, bool isFlipped)
+    {
+        Vector3 position = isFlipped ? leftCollisionPos.position : rightCollisionPos.position;
+        Debug.DrawRay(position, (isFlipped ? -dir : dir) * .1f, Color.blue, .1f);
+        Debug.DrawRay(position, -transform.up * .1f, Color.red, .1f);
+        RaycastHit2D hitSide = Physics2D.Raycast(position, isFlipped ? -dir:dir, .1f);
+        RaycastHit2D hitDown = Physics2D.Raycast(position, -transform.up, .1f);
+        if (hitDown.collider != null && hitSide.collider == null)
+        {
+            return true;
+        }
+        return false;
+    }
+}

Assets/Scripts/Enemy/HorizontalEnemy.cs

+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+public class HorizontalEnemy : BaseEnemy {
+
+    // Update is called once per frame
+    void Update () {
+		if (CheckCollision(transform.right, sr.flipX))
+        {
+            if (startMoveTime < Time.time)
+            {
+                Move(transform.right, sr.flipX);
+            }
+        }
+        else
+        {
+            sr.flipX = !sr.flipX;
+        }
+        
+	}
+}

Assets/Scripts/Enemy/VerticalEnemy.cs

+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+public class VerticalEnemy : BaseEnemy {
+    public bool leftWall;
+    void Update()
+    {
+        if (CheckCollision(transform.right, leftWall ? !sr.flipX : sr.flipX))
+        {
+            if (startMoveTime < Time.time)
+            {
+                Move(-transform.up, sr.flipX);
+            }
+        }
+        else
+        {
+            sr.flipX = !sr.flipX;
+        }
+    }
+}