using UnityEngine;
using System.Collections;
using System.Collections.Generic;
using UnityEngine.UI;
[AddComponentMenu("UI/Effects/Gradient")]
public class Gradient : BaseVertexEffect {
[SerializeField]
private Color32 topColor =
Color.white;
[SerializeField]
private Color32 bottomColor =
Color.black;
public override void ModifyVertices(List<UIVertex>
vertexList) {
if (!
IsActive()) {
return;
}
int count =
vertexList.Count;
if(count>
0){
float bottomY = vertexList[
0].position.y;
float topY = vertexList[
0].position.y;
for (
int i =
1; i < count; i++
) {
float y =
vertexList[i].position.y;
if (y >
topY) {
topY =
y;
}
else if (y <
bottomY) {
bottomY =
y;
}
}
float uiElementHeight = topY -
bottomY;
for (
int i =
0; i < count; i++
) {
UIVertex uiVertex =
vertexList[i];
uiVertex.color = Color32.Lerp(bottomColor, topColor, (uiVertex.position.y - bottomY) /
uiElementHeight);
vertexList[i] =
uiVertex;
}
}
}
}
转载于:https://www.cnblogs.com/Cocomo/p/7088097.html
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