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160 lines
3.5 KiB
160 lines
3.5 KiB
using UnityEngine;
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using System.Collections;
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public class Radar : MonoBehaviour
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{
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//网格模型顶点数量
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private int VERTICES_COUNT;
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//大小
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public float scale = 1;
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[Tooltip("边数为数组长度减1")]
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//顶点数组
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private Vector3[] vertices = new Vector3[6] ;
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//三角形数组
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int[] triangles;
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//每条边的长度设置
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private float[] edgeSizes = new float[6];
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//基础长度
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public float baseSize = 0.01f;
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MeshFilter meshFilter;
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Mesh mesh;
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float pi = 3.1415f;
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void Start()
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{
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CreateMesh();
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SetVertices();
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}
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void OnGUI()
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{
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//if (meshFilter == null)
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//{
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// CreateMesh();
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// SetVertices();
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//}
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// Fresh(); // 这个是刷新
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//if (GUILayout.Button("Fresh"))
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//{
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// Fresh();
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//}
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//if (GUILayout.Button("Set"))
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//{
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// SetVerticeLength(10);
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//}
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//if (GUILayout.Button("SetEdgeSizes"))
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//{
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// SetEdgeSizes(10, 0.5f);
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//}
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}
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void CreateMesh()
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{
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meshFilter = (MeshFilter)GetComponent(typeof(MeshFilter)); //GameObject.Find("radar")
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mesh = meshFilter.mesh;
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}
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void SetVertices()
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{
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VERTICES_COUNT = vertices.Length;
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int triangles_count = VERTICES_COUNT - 1;
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triangles = new int[triangles_count * 3];
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//设定原点坐标
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vertices[0] = new Vector3(0, 0, 1);
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//首个在x轴上的坐标点
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vertices[1] = new Vector3(45, 0, 1);
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//每个三角形角度
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float everyAngle = 360 / triangles_count;
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for (int i = 1; i < vertices.Length; i++)
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{
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var angle = GetRadians(everyAngle * (i - 1));
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vertices[i] = new Vector3(45 * Mathf.Cos(angle), 45 * Mathf.Sin(angle), 1);
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}
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int idx = 0;
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int value = 0;
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for (int i = 0; i < triangles.Length; i++)
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{
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if (i % 3 == 0)
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{
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triangles[i] = 0;
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value = idx;
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idx++;
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}
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else
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{
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value++;
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if (value == VERTICES_COUNT)
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value = 1;
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// Debug.Log("value " + value);
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triangles[i] = value;
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}
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}
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}
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float GetRadians(float angle)
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{
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return pi / 180 * angle;
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}
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void Apply()
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{
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Vector3[] tmps = new Vector3[vertices.Length];
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for (int i = 0; i < vertices.Length; i++)
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{
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tmps[i] = vertices[i] * vertices[i].z * scale * (baseSize + edgeSizes[i]);
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}
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if (mesh == null) {
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CreateMesh();
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}
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mesh.vertices = tmps;
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mesh.triangles = triangles;
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}
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/// <summary>
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/// 设置几边形
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/// </summary>
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/// <param name="num"></param>
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public void SetVerticeLength(int num)
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{
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if (num>=3)
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{
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vertices = new Vector3[num + 1];
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edgeSizes = new float[num + 1];
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SetVertices();
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}
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}
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/// <summary>
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/// 设置每条边的值
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/// </summary>
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/// <param name="i"></param>
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/// <param name="value"></param>
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public void SetEdgeSizes(int i,float value)
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{
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if (edgeSizes.Length > i)
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{
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edgeSizes[i] = value;
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}
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}
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/// <summary>
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/// 刷新绘制
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/// </summary>
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public void Fresh()
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{
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Apply();
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}
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}
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