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52 行
1.4 KiB
52 行
1.4 KiB
using UnityEngine;
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using System.Collections;
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using System.Collections.Generic;
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using UnityEngine.UI;
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[AddComponentMenu("UI/Effects/Gradient")]
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public class Gradient : BaseMeshEffect
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{
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public Color32 topColor = new Color32(248, 217, 44, 255);
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public Color32 bottomColor = new Color32(255, 255, 255, 255);
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public override void ModifyMesh(VertexHelper vh)
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{
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if (!IsActive())
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{
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return;
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}
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int count = vh.currentVertCount;
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if (count == 0) return;
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List<UIVertex> vertexs = new List<UIVertex>();
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for (int i = 0; i < count; i++)
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{
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UIVertex vertex = new UIVertex();
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vh.PopulateUIVertex(ref vertex, i);
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vertexs.Add(vertex);
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}
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float topY = vertexs[0].position.y;
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float bottomY = vertexs[0].position.y;
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for (int i = 1; i < count; i++)
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{
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float y = vertexs[i].position.y;
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if (y > topY)
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{
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topY = y;
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}
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else if (y < bottomY)
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{
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bottomY = y;
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}
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}
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float height = topY - bottomY;
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for (int i = 0; i < count; i++)
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{
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UIVertex vertex = vertexs[i];
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Color32 color = Color32.Lerp(bottomColor, topColor, (vertex.position.y - bottomY) / height);
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vertex.color = color;
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vh.SetUIVertex(vertex, i);
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}
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}
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}
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