From e372a00d8484c7ca8087903a7c8a8266756e3d92 Mon Sep 17 00:00:00 2001
From: Sweet Tini <mbenjamin@instechnologies.net>
Date: Sun, 2 Feb 2020 11:01:59 -0500
Subject: [PATCH] Add parallax scrolling to level

---
 Assets/ParallaxBackground.cs | 29 +++++++++++++++++++++--------
 Assets/Scenes/LevelOne.unity | 10 +++++-----
 2 files changed, 26 insertions(+), 13 deletions(-)

diff --git a/Assets/ParallaxBackground.cs b/Assets/ParallaxBackground.cs
index 17dc4f0..a79546e 100644
--- a/Assets/ParallaxBackground.cs
+++ b/Assets/ParallaxBackground.cs
@@ -4,24 +4,37 @@ using UnityEngine;
 
 public class ParallaxBackground : MonoBehaviour
 {
-    public Camera camera;
-    public SpriteRenderer renderer;
+    [SerializeField] Camera baseCamera;
+    [SerializeField] SpriteRenderer baseRenderer;
     public Vector2 scrollRate = Vector2.one * .4f;
 
+    Vector2 tileSize;
+    Vector2 offset = new Vector2(8f, 7.5f);
+
     // Start is called before the first frame update
     void Start()
     {
-        
+        baseRenderer.transform.position = new Vector3(
+            baseCamera.transform.position.x - offset.x,
+            baseCamera.transform.position.y - offset.y, 
+            baseRenderer.transform.position.z);
+
+        tileSize = baseRenderer.size;
+
+        baseRenderer.size = new Vector2(
+            (Mathf.Ceil(tileSize.x / (offset.x * 2f)) + 2f) * tileSize.x,
+            (Mathf.Ceil(tileSize.y / (offset.y * 2f)) + 2f) * tileSize.y);
     }
 
     // Update is called once per frame
     void Update()
     {
-        //var currentPos = 
-
-        //var offset = new Vector3(8f, -7.5f, 0f);
-
-        //renderer.transform.position = camera.transform.position + ((camera.transform.position * new Vector3(scrollRate.x, scrollRate.y, 0f)) - offset);
+        var depth = baseRenderer.transform.position.z;
+        var basePosition = (Vector2)baseCamera.transform.position - (offset * new Vector2(1f, -1f));
+        var scrollOffset = baseCamera.transform.position * scrollRate;
+        scrollOffset = new Vector2(scrollOffset.x % tileSize.x, scrollOffset.y % tileSize.y);
 
+        var position = basePosition - scrollOffset - tileSize * new Vector2(1, -1);
+        baseRenderer.transform.position = new Vector3(position.x, position.y, depth);
     }
 }
diff --git a/Assets/Scenes/LevelOne.unity b/Assets/Scenes/LevelOne.unity
index 33cfec5..03e12dc 100644
--- a/Assets/Scenes/LevelOne.unity
+++ b/Assets/Scenes/LevelOne.unity
@@ -47677,14 +47677,14 @@ SpriteRenderer:
   m_AutoUVMaxDistance: 0.5
   m_AutoUVMaxAngle: 89
   m_LightmapParameters: {fileID: 0}
-  m_SortingLayerID: 0
-  m_SortingLayer: 0
+  m_SortingLayerID: 1067504601
+  m_SortingLayer: -1
   m_SortingOrder: 0
   m_Sprite: {fileID: 21300000, guid: e33008ddf5593464c90eced40f3f28e8, type: 3}
   m_Color: {r: 1, g: 1, b: 1, a: 1}
   m_FlipX: 0
   m_FlipY: 0
-  m_DrawMode: 0
+  m_DrawMode: 2
   m_Size: {x: 16, y: 16}
   m_AdaptiveModeThreshold: 0.5
   m_SpriteTileMode: 0
@@ -47703,8 +47703,8 @@ MonoBehaviour:
   m_Script: {fileID: 11500000, guid: af4fa3c5d20488d4fa39fb11819d3f97, type: 3}
   m_Name: 
   m_EditorClassIdentifier: 
-  camera: {fileID: 1337282922}
-  renderer: {fileID: 1727766210}
+  baseCamera: {fileID: 1337282922}
+  baseRenderer: {fileID: 1727766210}
   scrollRate: {x: 0.4, y: 0.4}
 --- !u!1 &1895829829
 GameObject: