84 lines
2.4 KiB
C#
84 lines
2.4 KiB
C#
using UnityEngine;
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using System.Collections;
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using UnityEngine.UI;
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using Unity.VisualScripting;
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using System.Collections.Generic;
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[ExecuteInEditMode]
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public class PolygonUIMesh : Image
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{
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public List<Transform> points = new List<Transform>();
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private void OnGUI()
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{
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// 实时检测更新绘制 OnPopulateMesh 中 transform.child 位置
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SetAllDirty();
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}
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/// <summary>
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/// 根据 transform.child 位置 绘制 Mesh
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/// </summary>
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/// <param name="vh"></param>
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protected override void OnPopulateMesh(VertexHelper vh)
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{
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if (points.Count <= 2)
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{
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return;
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}
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Color32 color32 = color;
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vh.Clear();
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GenerateSimpleSprite(vh, false);
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}
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void GenerateSimpleSprite(VertexHelper vh, bool lPreserveAspect)
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{
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//Vector4 v = GetDrawingDimensions(lPreserveAspect);
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var uv = (sprite != null) ? UnityEngine.Sprites.DataUtility.GetOuterUV(sprite) : Vector4.zero;
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var color32 = color;
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vh.Clear();
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//vh.AddVert(new Vector3(v.x, v.y), color32, new Vector2(uv.x, uv.y));
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//vh.AddVert(new Vector3(v.x, v.w), color32, new Vector2(uv.x, uv.w));
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//vh.AddVert(new Vector3(v.z, v.w), color32, new Vector2(uv.z, uv.w));
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//vh.AddVert(new Vector3(v.z, v.y), color32, new Vector2(uv.z, uv.y));
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//vh.AddTriangle(0, 1, 2);
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//vh.AddTriangle(2, 3, 0);
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// 几何图形的顶点，本例中根据子节点坐标确定顶点
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vh.AddVert(points[0].localPosition, color32, new Vector2(uv.x, uv.y));
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vh.AddVert(points[1].localPosition, color32, new Vector2(uv.x, uv.w));
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vh.AddVert(points[2].localPosition, color32, new Vector2(uv.z, uv.w));
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vh.AddVert(points[3].localPosition, color32, new Vector2(uv.z, uv.y));
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vh.AddTriangle(0, 1, 2);
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vh.AddTriangle(2, 3, 0);
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//for (int i = 0; i < (transform.childCount - 2); i++)
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//{
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// // 几何图形中的三角形
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// vh.AddTriangle(i + 1, i + 2, 0);
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//}
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}
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/// <summary>
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/// 点的辅助绘制
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/// </summary>
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private void OnDrawGizmos()
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{
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if (transform.childCount == 0)
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{
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return;
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}
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for (int i = 0; i < transform.childCount; i++)
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{
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Gizmos.DrawSphere(transform.GetChild(i).position, 2.55f);
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Gizmos.DrawIcon(transform.GetChild(i).position, "numbers/numbers_" + i + ".PNG", false);
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}
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}
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} |