70 lines
2.4 KiB
C#
70 lines
2.4 KiB
C#
using System.Collections;
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using System.Collections.Generic;
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using UnityEngine;
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namespace BF
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{
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[RequireComponent(typeof(MeshRenderer), typeof(MeshFilter))]
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public class SkillSectorMesh : MonoBehaviour
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{
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public float Radius = 1; //外半径
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public float InnerRadius = 0; //内半径
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public float AngleDegree = 360; //扇形或扇面的角度
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public int Segments = 60; //分割数
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private MeshFilter meshFilter;
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void Start()
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{
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meshFilter = GetComponent<MeshFilter>();
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}
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Mesh CreateMesh(float radius, float innerradius,float angledegree,int segments)
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{
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int verticesCount = segments * 2 + 2; // 因为vertices(顶点)的个数与triangles（索引三角形顶点数）必须匹配
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Vector3[] vertices = new Vector3[verticesCount];
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float angleCur = Mathf.Deg2Rad * (angledegree/2 + 90);
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float angledelta = (Mathf.Deg2Rad * angledegree) / segments;
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for(int i = 0; i < verticesCount; i += 2)
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{
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float cosA = Mathf.Cos(angleCur);
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float sinA = Mathf.Sin(angleCur);
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vertices[i] = new Vector3(radius * cosA, 0, radius * sinA);
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vertices[i + 1] = new Vector3(innerradius * cosA, 0, innerradius * sinA);
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angleCur -= angledelta;
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}
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int triangleCount = segments * 6;
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int[] triangles = new int[triangleCount];
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for(int i = 0, vi = 0; i < triangleCount; i += 6, vi += 2)
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{
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triangles[i] = vi;
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triangles[i + 1] = vi + 3;
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triangles[i + 2] = vi + 1;
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triangles[i + 3] = vi + 2;
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triangles[i + 4] = vi + 3;
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triangles[i + 5] = vi;
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}
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//uv:
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Vector2[] uvs = new Vector2[verticesCount];
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for (int i = 0; i < verticesCount; i++)
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{
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uvs[i] = new Vector2(vertices[i].x / radius / 2 + 0.5f, vertices[i].z / radius / 2 + 0.5f);
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}
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Mesh mesh = new Mesh();
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mesh.vertices = vertices;
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mesh.triangles = triangles;
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mesh.uv = uvs;
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return mesh;
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}
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public void RefreshMesh()
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{
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meshFilter.mesh = CreateMesh(Radius, InnerRadius, AngleDegree, Segments);
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}
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}
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} |