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/VerticalColorGradual")]
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public class VerticalColorGradual:BaseMeshEffect {
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[SerializeField]
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private Color32 m_TopColor = Color.white;
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public Color32 topColor {
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get {
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return m_TopColor;
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}
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set {
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m_TopColor = value;
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this.graphic.SetVerticesDirty();
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}
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}
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[SerializeField]
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private Color32 m_BottomColor = Color.black;
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public Color32 bottomColor {
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get {
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return m_BottomColor;
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}
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set {
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m_BottomColor = value;
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this.graphic.SetVerticesDirty();
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}
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}
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[Range(-1,1)]
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[SerializeField]
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private float m_Center = 0f;
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public float center {
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get {
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return m_Center;
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}
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set {
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m_Center = value;
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this.graphic.SetVerticesDirty();
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}
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}
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public override void ModifyMesh(VertexHelper vh) {
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var vertexList = new List<UIVertex>();
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vh.GetUIVertexStream(vertexList);
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int count = vertexList.Count;
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if(count > 0) {
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var bottomY = vertexList[0].position.y;
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var topY = vertexList[0].position.y;
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for(int i = 1;i < count;i++) {
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var y = vertexList[i].position.y;
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if(y > topY) {
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topY = y;
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}
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else if(y < bottomY) {
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bottomY = y;
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}
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}
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var height = topY - bottomY;
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for(int i = 0;i < count;i++) {
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var uiVertex = vertexList[i];
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uiVertex.color = Color32.Lerp(bottomColor,topColor,Mathf.Clamp01((uiVertex.position.y - (bottomY + height * center)) / height));
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vertexList[i] = uiVertex;
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}
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}
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vh.Clear();
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vh.AddUIVertexTriangleStream(vertexList);
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}
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}
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