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@@ -1,124 +1,288 @@
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using UnityEngine;
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using System.Collections.Generic;
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using System.Linq;
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public class ShadowColliderGenerator : MonoBehaviour
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{
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public Camera shadowCamera; // ר<><D7A8><EFBFBD><EFBFBD>Ⱦ<EFBFBD><C8BE>Ӱ<EFBFBD><D3B0><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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public RenderTexture shadowRT; // <20><>Ⱦ<EFBFBD><C8BE><EFBFBD><EFBFBD>
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public LayerMask shadowCasterLayer; // Ͷ<><CDB6><EFBFBD><EFBFBD>Ӱ<EFBFBD><D3B0><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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public float colliderPrecision = 0.1f; // <20><>ײ<EFBFBD>徫<EFBFBD><E5BEAB>
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[Header("References")]
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public Camera shadowCamera;
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public RenderTexture shadowRT;
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public PolygonCollider2D polygonCollider;
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[Header("Settings")]
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[Range(0f, 1f)]
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public float shadowThreshold = 0.3f;
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public int gridSize = 2; // 网格大小，越小越精确
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public float simplifyTolerance = 1f;
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private Texture2D processedTexture;
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private PolygonCollider2D polygonCollider;
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void Start()
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{
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// <20><>ʼ<EFBFBD><CABC><EFBFBD><EFBFBD>Ⱦ<EFBFBD><C8BE><EFBFBD><EFBFBD>
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shadowRT = new RenderTexture(512, 512, 24);
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shadowCamera.targetTexture = shadowRT;
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// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>õ<EFBFBD><C3B5><EFBFBD><EFBFBD><EFBFBD>
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processedTexture = new Texture2D(512, 512, TextureFormat.RGB24, false);
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polygonCollider = GetComponent<PolygonCollider2D>();
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if (polygonCollider == null)
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polygonCollider = gameObject.AddComponent<PolygonCollider2D>();
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polygonCollider = GetComponent<PolygonCollider2D>();
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processedTexture = new Texture2D(shadowRT.width, shadowRT.height, TextureFormat.R8, false);
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GenerateCollider();
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}
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void Update()
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{
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GenerateShadowCollider();
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if (Input.GetKeyDown(KeyCode.Space))
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{
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GenerateCollider();
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}
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}
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void GenerateShadowCollider()
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[ContextMenu("Generate Collider")]
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public void GenerateCollider()
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{
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// 1. <20><>Ⱦ<EFBFBD><C8BE>Ӱ<EFBFBD><D3B0><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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if (shadowCamera == null || shadowRT == null) return;
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// 渲染阴影
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shadowCamera.Render();
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// 2. <20><>GPU<50><55>ȡ<EFBFBD><C8A1><EFBFBD><EFBFBD><EFBFBD><EFBFBD>CPU
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// 读取纹理
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RenderTexture.active = shadowRT;
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processedTexture.ReadPixels(new Rect(0, 0, shadowRT.width, shadowRT.height), 0, 0);
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processedTexture.Apply();
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RenderTexture.active = null;
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// 3. <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӱ<EFBFBD><D3B0>Ե
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List<Vector2> edgePoints = DetectEdges(processedTexture);
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// 生成轮廓
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List<Vector2> contour = GenerateContourFromTexture();
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// 4. ת<><D7AA>Ϊ<EFBFBD><CEAA><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>겢<EFBFBD><EAB2A2><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ײ<EFBFBD><D7B2>
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if (edgePoints.Count > 2)
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if (contour.Count > 2)
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{
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List<Vector2> worldPoints = ConvertToWorldCoordinates(edgePoints);
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List<Vector2> worldPoints = ConvertToWorldCoordinates(contour);
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polygonCollider.SetPath(0, worldPoints);
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Debug.Log($"Collider generated with {worldPoints.Count} points");
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}
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else
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{
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polygonCollider.pathCount = 0;
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Debug.Log("No contour generated");
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}
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}
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List<Vector2> DetectEdges(Texture2D texture)
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List<Vector2> GenerateContourFromTexture()
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{
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List<Vector2> edges = new List<Vector2>();
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Color[] pixels = texture.GetPixels();
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int width = processedTexture.width;
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int height = processedTexture.height;
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int width = texture.width;
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int height = texture.height;
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// 创建二值化网格
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bool[,] grid = CreateBinaryGrid(width, height);
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// <EFBFBD>ı<EFBFBD>Ե<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>㷨
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for (int y = 1; y < height - 1; y += (int)(1f / colliderPrecision))
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// 找到所有边界点
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List<Vector2> boundaryPoints = FindBoundaryPoints(grid);
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// 连接边界点形成轮廓
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List<Vector2> contour = ConnectBoundaryPoints(boundaryPoints);
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return contour;
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}
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bool[,] CreateBinaryGrid(int width, int height)
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{
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bool[,] grid = new bool[width / gridSize, height / gridSize];
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for (int x = 0; x < grid.GetLength(0); x++)
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{
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for (int x = 1; x < width - 1; x += (int)(1f / colliderPrecision))
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for (int y = 0; y < grid.GetLength(1); y++)
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{
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int index = y * width + x;
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int texX = x * gridSize;
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int texY = y * gridSize;
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Color pixel = processedTexture.GetPixel(texX, texY);
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grid[x, y] = pixel.grayscale < shadowThreshold;
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}
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}
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// <20><><EFBFBD>鵱ǰ<E9B5B1><C7B0><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Χ<EFBFBD><CEA7><EFBFBD>صIJ<D8B5><C4B2><EFBFBD>
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if (IsEdgePixel(pixels, index, width))
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return grid;
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}
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List<Vector2> FindBoundaryPoints(bool[,] grid)
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{
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List<Vector2> boundaryPoints = new List<Vector2>();
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int width = grid.GetLength(0);
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int height = grid.GetLength(1);
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for (int x = 0; x < width; x++)
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{
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for (int y = 0; y < height; y++)
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{
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if (grid[x, y])
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{
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edges.Add(new Vector2(x, y));
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// 检查是否是边界（有非阴影像素邻居）
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bool isBoundary = false;
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// 检查4邻域
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if (x == 0 || !grid[x - 1, y]) isBoundary = true;
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else if (x == width - 1 || !grid[x + 1, y]) isBoundary = true;
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else if (y == 0 || !grid[x, y - 1]) isBoundary = true;
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else if (y == height - 1 || !grid[x, y + 1]) isBoundary = true;
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if (isBoundary)
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{
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boundaryPoints.Add(new Vector2(x * gridSize, y * gridSize));
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}
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}
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}
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}
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return edges;
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Debug.Log($"Found {boundaryPoints.Count} boundary points");
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return boundaryPoints;
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}
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bool IsEdgePixel(Color[] pixels, int index, int width)
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List<Vector2> ConnectBoundaryPoints(List<Vector2> points)
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{
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Color current = pixels[index];
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float currentBrightness = current.r + current.g + current.b;
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if (points.Count < 3) return points;
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// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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float[] neighborBrightness = new float[4]
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{
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pixels[index - 1].r + pixels[index - 1].g + pixels[index - 1].b, // <20><>
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pixels[index + 1].r + pixels[index + 1].g + pixels[index + 1].b, // <20><>
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pixels[index - width].r + pixels[index - width].g + pixels[index - width].b, // <20><>
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pixels[index + width].r + pixels[index + width].g + pixels[index + width].b // <20><>
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};
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List<Vector2> contour = new List<Vector2>();
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List<Vector2> remaining = new List<Vector2>(points);
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// <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ھӲ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ϴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD>DZ<EFBFBD>Ե
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float threshold = 0.3f;
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for (int i = 0; i < 4; i++)
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// 找到最左边的点作为起点
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Vector2 start = remaining.OrderBy(p => p.x).First();
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contour.Add(start);
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remaining.Remove(start);
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Vector2 current = start;
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Vector2 previousDirection = Vector2.right;
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int maxIterations = points.Count * 2;
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int iterations = 0;
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while (remaining.Count > 0 && iterations < maxIterations)
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{
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if (Mathf.Abs(currentBrightness - neighborBrightness[i]) > threshold)
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return true;
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iterations++;
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// 找到与当前方向最一致的下一个点
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float bestScore = float.MinValue;
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Vector2 bestPoint = Vector2.zero;
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int bestIndex = -1;
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for (int i = 0; i < remaining.Count; i++)
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{
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Vector2 toPoint = (remaining[i] - current).normalized;
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float distance = Vector2.Distance(current, remaining[i]);
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// 评分：方向一致性 + 距离权重
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float directionScore = Vector2.Dot(previousDirection, toPoint);
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float distanceScore = 1f / (distance + 0.1f);
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float totalScore = directionScore + distanceScore * 0.1f;
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if (totalScore > bestScore && distance < 50f) // 距离限制
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{
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bestScore = totalScore;
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bestPoint = remaining[i];
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bestIndex = i;
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}
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}
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if (bestIndex >= 0)
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{
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previousDirection = (bestPoint - current).normalized;
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contour.Add(bestPoint);
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remaining.RemoveAt(bestIndex);
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current = bestPoint;
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}
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else
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{
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break;
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}
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}
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return false;
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// 确保轮廓闭合
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if (contour.Count > 2 && Vector2.Distance(contour[0], contour[contour.Count - 1]) > 30f)
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{
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contour.Add(contour[0]);
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}
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// 简化轮廓
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contour = SimplifyContour(contour);
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Debug.Log($"Connected {contour.Count} points into contour");
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return contour;
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}
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List<Vector2> SimplifyContour(List<Vector2> contour)
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{
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if (contour.Count <= 3) return contour;
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List<Vector2> simplified = new List<Vector2>();
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simplified.Add(contour[0]);
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for (int i = 1; i < contour.Count - 1; i++)
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{
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// 如果角度变化太大，保留这个点
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if (i > 1)
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{
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Vector2 prevDir = (contour[i] - contour[i - 1]).normalized;
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Vector2 nextDir = (contour[i + 1] - contour[i]).normalized;
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float angle = Vector2.Angle(prevDir, nextDir);
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if (angle > 30f) // 角度阈值
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{
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simplified.Add(contour[i]);
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}
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}
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}
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simplified.Add(contour[contour.Count - 1]);
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return simplified;
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}
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List<Vector2> ConvertToWorldCoordinates(List<Vector2> texturePoints)
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{
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List<Vector2> worldPoints = new List<Vector2>();
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Bounds wallBounds = GetComponent<Collider2D>().bounds;
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foreach (Vector2 point in texturePoints)
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foreach (Vector2 texCoord in texturePoints)
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{
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// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ת<EFBFBD><D7AA>Ϊǽ<CEAA><C7BD><EFBFBD>ֲ<EFBFBD><D6B2><EFBFBD><EFBFBD><EFBFBD>
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Vector2 localPoint = new Vector2(
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point.x / shadowRT.width * wallBounds.size.x - wallBounds.size.x * 0.5f,
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point.y / shadowRT.height * wallBounds.size.y - wallBounds.size.y * 0.5f
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Vector3 viewportPos = new Vector3(
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texCoord.x / processedTexture.width,
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texCoord.y / processedTexture.height,
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shadowCamera.nearClipPlane
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);
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worldPoints.Add(localPoint);
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Vector3 worldPos = shadowCamera.ViewportToWorldPoint(viewportPos);
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worldPoints.Add(new Vector2(worldPos.x, worldPos.y));
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}
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return worldPoints;
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}
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// 调试：显示边界点
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void OnDrawGizmosSelected()
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{
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if (processedTexture == null) return;
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Gizmos.color = Color.red;
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// 显示边界点
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bool[,] grid = CreateBinaryGrid(processedTexture.width, processedTexture.height);
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List<Vector2> boundaryPoints = FindBoundaryPoints(grid);
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foreach (Vector2 point in boundaryPoints)
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{
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Vector3 viewportPos = new Vector3(
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point.x / processedTexture.width,
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point.y / processedTexture.height,
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shadowCamera.nearClipPlane
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);
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Vector3 worldPos = shadowCamera.ViewportToWorldPoint(viewportPos);
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Gizmos.DrawSphere(worldPos, 0.02f);
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}
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// 显示碰撞器轮廓
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if (polygonCollider != null && polygonCollider.pathCount > 0)
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{
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Gizmos.color = Color.green;
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Vector2[] path = polygonCollider.GetPath(0);
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for (int i = 0; i < path.Length; i++)
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{
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Vector3 start = path[i];
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Vector3 end = path[(i + 1) % path.Length];
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Gizmos.DrawLine(start, end);
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}
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}
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}
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}
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Reference in New Issue
Block a user