43 lines
1.3 KiB
C#
43 lines
1.3 KiB
C#
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using UnityEngine;
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using UnityEngine.UI;
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using System.Collections.Generic;
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public class UIGradient : BaseMeshEffect
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{
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public Color maxColor = Color.white;
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public Color minColor = Color.black;
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public bool isHorizontal;
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public override void ModifyMesh(VertexHelper vh)
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{
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if (!IsActive())
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return;
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var count = vh.currentVertCount;
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if (count < 1)
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return;
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List<UIVertex> verticles = new List<UIVertex>();
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for (var i = 0; i < count; i++)
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{
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var vertex = new UIVertex();
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vh.PopulateUIVertex(ref vertex, i);
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verticles.Add(vertex);
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}
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float min = GetAxis(verticles[0]);
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float max = GetAxis(verticles[0]);
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for (int i = 1; i < verticles.Count; i++)
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{
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min = Mathf.Min(min, GetAxis(verticles[i]));
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max = Mathf.Max(max, GetAxis(verticles[i]));
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}
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var heightInvert = 1f / (max - min);
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for (int i = 0; i < verticles.Count; i++)
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{
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var item = verticles[i];
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item.color = Color.Lerp(minColor, maxColor, (GetAxis(item) - min) * heightInvert);
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vh.SetUIVertex(item, i);
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}
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}
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public float GetAxis(UIVertex vertex)
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{
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return isHorizontal ? vertex.position.x : vertex.position.y;
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}
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}
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