Assets/Scripts/Terrain/ParallaxBackground.cs

   1 using System;
   2 using System.Collections.Generic;
   3 using System.Linq;
   4 using UnityEngine;
   5
   6 public class ParallaxBackground : MonoBehaviour
   7 {
   8     private Dictionary<ParallaxBackgroundLayer.Layer, Transform[]> m_layers = new Dictionary<ParallaxBackgroundLayer.Layer, Transform[]>();
   9     private Dictionary<ParallaxBackgroundLayer.Layer, float> m_speeds = new Dictionary<ParallaxBackgroundLayer.Layer, float>();
  10     private Dictionary<Transform, Vector3> m_offsets = new Dictionary<Transform, Vector3>();
  11
  12     private Transform m_yarn;
  13
  14     private void Start()
  15     {
  16         m_yarn = GameObject.FindGameObjectWithTag("YarnPhysics").transform;
  17
  18         List<Transform> children = new List<Transform>();
  19         foreach (Transform child in transform)
  20         {
  21             children.Add(child);
  22             m_offsets.Add(child, child.position - m_yarn.position);
  23         }
  24
  25         var layersDefined = Enum.GetValues(typeof(ParallaxBackgroundLayer.Layer));
  26         float speedModifier = 0.9f;
  27         foreach (ParallaxBackgroundLayer.Layer layer in layersDefined)
  28         {
  29             List<Transform> childrenInLayer = children.Where(t => t.GetComponent<ParallaxBackgroundLayer>().m_layer == layer).ToList();
  30
  31             m_layers.Add(layer, childrenInLayer.ToArray());
  32             m_speeds.Add(layer, speedModifier);
  33             speedModifier /= layersDefined.Length;
  34         }
  35     }
  36
  37     void Update ()
  38     {
  39         var layersDefined = Enum.GetValues(typeof(ParallaxBackgroundLayer.Layer));
  40         foreach (ParallaxBackgroundLayer.Layer layer in layersDefined)
  41         {
  42             float layerSpeed = m_speeds[layer];
  43
  44             foreach (Transform child in m_layers[layer])
  45             {
  46                 Vector3 offset = m_offsets[child];
  47
  48                 child.position = new Vector3
  49                     (
  50                         m_yarn.position.x + offset.x,
  51                         m_yarn.position.y + offset.y,   // temp, while parallax effect is being fixed
  52                         0.0f
  53                     );
  54             }
  55         }
  56         }
  57 }