88 lines
2.8 KiB
C#
88 lines
2.8 KiB
C#
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using System.Collections.Generic;
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using UnityEngine;
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using System.Linq;
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namespace TilemapShadowCaster.Runtime
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{
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[ExecuteInEditMode]
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[DisallowMultipleComponent]
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[AddComponentMenu("Rendering/2D/Tilemap Shadow Caster")]
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public class TilemapShadowCaster2D : MonoBehaviour
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{
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[SerializeField] private uint colliderHash;
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[SerializeField] private bool m_SelfShadows = false;
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[SerializeField] private int m_ApplyToSortingLayers = -1;
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private void Update()
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{
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CompositeCollider2D collider = GetComponent<CompositeCollider2D>();
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uint shapeHash = collider.GetShapeHash();
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if (shapeHash == colliderHash) return;
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colliderHash = shapeHash;
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ReinitializeShapes(collider);
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}
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private int[] getLayers(){
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int[] values = SortingLayer.layers.Select(l => l.id).ToArray();
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List<int> sortingLayers = new List<int>();
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int propCount = 0;
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for (int i = 0; i < values.Length; i++)
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{
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int layer = 1 << i;
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if ((m_ApplyToSortingLayers & layer) != 0)
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{
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sortingLayers.Add(values[propCount]);
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propCount ++;
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}
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}
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int[] layerArray = sortingLayers.ToArray();
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return layerArray;
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}
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private void ReinitializeShapes(CompositeCollider2D collider)
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{
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RemoveCurrentShadows();
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for (int i = 0; i < collider.pathCount; i++)
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{
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List<Vector2> points = new List<Vector2>();
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collider.GetPath(i, points);
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GameObject go = new GameObject("AutogeneratedShadowPath", typeof(MeshRenderer));
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go.transform.parent = transform;
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PathShadow path = go.AddComponent<PathShadow>();
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path.useRendererSilhouette = false;
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path.selfShadows = m_SelfShadows;
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path.SetShape(points, getLayers());
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}
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}
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private void RemoveCurrentShadows()
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{
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new List<PathShadow>(GetComponentsInChildren<PathShadow>())
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.ConvertAll(comp => comp.transform.gameObject)
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.ForEach(gameObject =>
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{
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if (Application.isEditor)
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{
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DestroyImmediate(gameObject);
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}
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else
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{
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Destroy(gameObject);
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}
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});
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}
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public void ReinitializeShapes()
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{
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ReinitializeShapes(GetComponent<CompositeCollider2D>());
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}
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public void OnDestroy()
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{
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RemoveCurrentShadows();
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}
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}
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}
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