using UnityEngine; using System.Collections; using System.Collections.Generic; using UnityEngine.UI; using System; /// /// 渐变字体 /// [AddComponentMenu("UI/Effects/Gradient")] public class FontGradient : BaseMeshEffect { public Color32 topColor = Color.white; public Color32 bottomColor = Color.black; public bool useGraphicAlpha = true; public override void ModifyMesh(VertexHelper vh) { if (!IsActive()) { return; } var count = vh.currentVertCount; if (count==0) { return; } var vertexs = new List(); for (int i = 0; i < count; i++) { var vertex = new UIVertex(); vh.PopulateUIVertex(ref vertex, i); vertexs.Add(vertex); } var topY = vertexs[0].position.y; var bottomY = vertexs[0].position.y; for (int i = 0; i < count; i++) { var y = vertexs[i].position.y; if (y > topY) { topY = y; } else if (y < bottomY) { bottomY = y; } } var height = topY - bottomY; for (var i = 0; i < count; i++) { var vertex = vertexs[i]; var color = Color32.Lerp(bottomColor, topColor, (vertex.position.y - bottomY) / height); vertex.color = color; vh.SetUIVertex(vertex, i); } } }