Unity查找网格边缘并给边缘绘制线条代码参考

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已于 2024-10-14 08:18:16 修改 · 387 阅读

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#Unity

于 2024-10-13 11:25:58 首次发布

效果参考如下：

代码参考如下：

using System.Collections.Generic;
using UnityEngine;

public class BorderFind : MonoBehaviour
{
	[SerializeField]
	MeshFilter meshFilter;
	[SerializeField]
	Material matLine;

	void Start()
	{
		if (meshFilter == null) return;
		Mesh mesh = OptimizeMesh(meshFilter.sharedMesh, true);
		if (mesh == null) return;
		List<List<Vector3>> borders = GetBorders(mesh);
		foreach (List<Vector3> b in borders)
		{
			GameObject go = new GameObject();
			go.transform.parent = transform;
			LineRenderer lineRenderer = go.AddComponent<LineRenderer>();
			lineRenderer.positionCount = b.Count;
			lineRenderer.SetPositions(b.ToArray());
			lineRenderer.loop = true;
			lineRenderer.material = Instantiate(matLine);
			lineRenderer.material.color = Random.ColorHSV();
		}
	}

	List<List<Vector3>> GetBorders(Mesh meshOriginal)
	{
		List<Edge> listEdgeNoSharedAll = new();
		Mesh mesh = OptimizeMesh(meshOriginal, true);
		Vector3[] vs = mesh.vertices;
		int[] ts = mesh.triangles;

		for (int i = 0; i < ts.Length; i += 3)
		{
			int edge01Start = ts[i];
			int edge01End = ts[i + 1];
			int edge02Start = ts[i + 1];
			int edge0