using UnityEngine;
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using UnityEngine.UI;
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using System.Collections.Generic;
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/// <summary>
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/// UGUI描边
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/// </summary>
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public class OutlineEx : BaseMeshEffect
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{
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[Header("新shader描边")]
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public Color OutlineColor = Color.white;
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QualityTextColType m_ColorType = QualityTextColType.None;
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public QualityTextColType colorType
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{
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get { return m_ColorType; }
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set
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{
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if (m_ColorType != value)
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{
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m_ColorType = value;
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OutlineColor = UIHelper.GetUIOutlineColor(value);
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this._Refresh();
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}
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}
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}
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[Range(0, 15)]
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public int OutlineWidth = 0;
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private static List<UIVertex> m_VetexList = new List<UIVertex>();
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// 材质池：Key为"颜色_宽度"格式的字符串，Value为对应的材质; 减少合批问题，又能保持不同的描边；共用材质会同时改变参数
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private static Dictionary<string, Material> m_MaterialPool = new Dictionary<string, Material>();
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private static Shader m_Shader;
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protected override void Start()
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{
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base.Start();
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if (m_Shader == null)
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{
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m_Shader = Shader.Find("TSF Shaders/UI/OutlineEx");
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}
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// 使用材质池获取或创建材质
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string key = GetMaterialKey(OutlineColor, OutlineWidth);
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if (!m_MaterialPool.TryGetValue(key, out Material material))
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{
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material = new Material(m_Shader);
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material.SetColor("_OutlineColor", this.OutlineColor);
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material.SetInt("_OutlineWidth", this.OutlineWidth);
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m_MaterialPool[key] = material;
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}
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base.graphic.material = material;
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var v1 = base.graphic.canvas.additionalShaderChannels;
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var v2 = AdditionalCanvasShaderChannels.TexCoord1;
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if ((v1 & v2) != v2)
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{
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base.graphic.canvas.additionalShaderChannels |= v2;
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}
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v2 = AdditionalCanvasShaderChannels.TexCoord2;
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if ((v1 & v2) != v2)
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{
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base.graphic.canvas.additionalShaderChannels |= v2;
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}
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this._Refresh();
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}
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#if UNITY_EDITOR
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protected override void OnValidate()
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{
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base.OnValidate();
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if (base.graphic.material != null)
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{
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this._Refresh();
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}
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}
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#endif
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private void _Refresh()
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{
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// 检查当前材质是否与所需属性匹配，如果不匹配则从池中获取或创建新材质
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string key = GetMaterialKey(OutlineColor, OutlineWidth);
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Material material;
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if (!m_MaterialPool.TryGetValue(key, out material))
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{
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// 如果池中没有对应的材质，创建新材质
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var shader = Shader.Find("TSF Shaders/UI/OutlineEx");
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material = new Material(shader);
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m_MaterialPool[key] = material;
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}
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material.SetColor("_OutlineColor", this.OutlineColor);
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material.SetInt("_OutlineWidth", this.OutlineWidth);
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// 更新图形材质
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base.graphic.material = material;
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base.graphic.SetVerticesDirty();
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}
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public override void ModifyMesh(VertexHelper vh)
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{
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vh.GetUIVertexStream(m_VetexList);
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this._ProcessVertices();
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vh.Clear();
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vh.AddUIVertexTriangleStream(m_VetexList);
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}
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private void _ProcessVertices()
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{
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for (int i = 0, count = m_VetexList.Count - 3; i <= count; i += 3)
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{
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var v1 = m_VetexList[i];
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var v2 = m_VetexList[i + 1];
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var v3 = m_VetexList[i + 2];
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// 计算原顶点坐标中心点
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//
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var minX = _Min(v1.position.x, v2.position.x, v3.position.x);
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var minY = _Min(v1.position.y, v2.position.y, v3.position.y);
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var maxX = _Max(v1.position.x, v2.position.x, v3.position.x);
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var maxY = _Max(v1.position.y, v2.position.y, v3.position.y);
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var posCenter = new Vector2(minX + maxX, minY + maxY) * 0.5f;
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// 计算原始顶点坐标和UV的方向
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//
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Vector2 triX, triY, uvX, uvY;
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Vector2 pos1 = v1.position;
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Vector2 pos2 = v2.position;
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Vector2 pos3 = v3.position;
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if (Mathf.Abs(Vector2.Dot((pos2 - pos1).normalized, Vector2.right))
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> Mathf.Abs(Vector2.Dot((pos3 - pos2).normalized, Vector2.right)))
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{
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triX = pos2 - pos1;
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triY = pos3 - pos2;
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uvX = v2.uv0 - v1.uv0;
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uvY = v3.uv0 - v2.uv0;
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}
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else
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{
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triX = pos3 - pos2;
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triY = pos2 - pos1;
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uvX = v3.uv0 - v2.uv0;
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uvY = v2.uv0 - v1.uv0;
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}
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// 计算原始UV框
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//
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var uvMin = _Min(v1.uv0, v2.uv0, v3.uv0);
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var uvMax = _Max(v1.uv0, v2.uv0, v3.uv0);
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var uvOrigin = new Vector4(uvMin.x, uvMin.y, uvMax.x, uvMax.y);
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// 为每个顶点设置新的Position和UV，并传入原始UV框
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//
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v1 = _SetNewPosAndUV(v1, this.OutlineWidth, posCenter, triX, triY, uvX, uvY, uvOrigin);
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v2 = _SetNewPosAndUV(v2, this.OutlineWidth, posCenter, triX, triY, uvX, uvY, uvOrigin);
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v3 = _SetNewPosAndUV(v3, this.OutlineWidth, posCenter, triX, triY, uvX, uvY, uvOrigin);
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// 应用设置后的UIVertex
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//
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m_VetexList[i] = v1;
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m_VetexList[i + 1] = v2;
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m_VetexList[i + 2] = v3;
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}
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}
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private static UIVertex _SetNewPosAndUV(UIVertex pVertex, int pOutLineWidth,
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Vector2 pPosCenter,
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Vector2 pTriangleX, Vector2 pTriangleY,
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Vector2 pUVX, Vector2 pUVY,
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Vector4 pUVOrigin)
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{
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// Position
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var pos = pVertex.position;
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var posXOffset = pos.x > pPosCenter.x ? pOutLineWidth : -pOutLineWidth;
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var posYOffset = pos.y > pPosCenter.y ? pOutLineWidth : -pOutLineWidth;
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pos.x += posXOffset;
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pos.y += posYOffset;
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pVertex.position = pos;
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// UV
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var uv = pVertex.uv0;
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uv += new Vector4((pUVX / pTriangleX.magnitude * posXOffset * (Vector2.Dot(pTriangleX, Vector2.right) > 0 ? 1 : -1)).x, (pUVX / pTriangleX.magnitude * posXOffset * (Vector2.Dot(pTriangleX, Vector2.right) > 0 ? 1 : -1)).y, 0, 0);
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uv += new Vector4((pUVY / pTriangleY.magnitude * posYOffset * (Vector2.Dot(pTriangleY, Vector2.up) > 0 ? 1 : -1)).x, (pUVY / pTriangleY.magnitude * posYOffset * (Vector2.Dot(pTriangleY, Vector2.up) > 0 ? 1 : -1)).y, 0, 0);
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pVertex.uv0 = uv;
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// 原始UV框
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pVertex.uv1 = new Vector2(pUVOrigin.x, pUVOrigin.y);
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pVertex.uv2 = new Vector2(pUVOrigin.z, pUVOrigin.w);
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return pVertex;
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}
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private static float _Min(float pA, float pB, float pC)
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{
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return Mathf.Min(Mathf.Min(pA, pB), pC);
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}
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private static float _Max(float pA, float pB, float pC)
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{
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return Mathf.Max(Mathf.Max(pA, pB), pC);
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}
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private static Vector2 _Min(Vector2 pA, Vector2 pB, Vector2 pC)
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{
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return new Vector2(_Min(pA.x, pB.x, pC.x), _Min(pA.y, pB.y, pC.y));
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}
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private static Vector2 _Max(Vector2 pA, Vector2 pB, Vector2 pC)
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{
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return new Vector2(_Max(pA.x, pB.x, pC.x), _Max(pA.y, pB.y, pC.y));
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}
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// 生成材质池的键
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private string GetMaterialKey(Color color, int width)
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{
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// 使用颜色的RGBA值和宽度生成唯一键
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return string.Format("{0}_{1}_{2}_{3}_{4}",
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color.r, color.g, color.b, color.a, width);
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}
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}
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