using System.Collections;
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using System.Collections.Generic;
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using UnityEngine;
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using UnityEngine.UI;
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[DisallowMultipleComponent]
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[RequireComponent(typeof(Image))]
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public class FlipImage : BaseMeshEffect
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{
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[SerializeField] bool m_FlipHorizontal = false;
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[SerializeField] bool m_FlipVertical = false;
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public bool flipHorizontal
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{
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get { return m_FlipHorizontal; }
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set
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{
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m_FlipHorizontal = value;
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graphic.SetVerticesDirty();
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}
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}
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public bool flipVertical
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{
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get { return m_FlipVertical; }
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set
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{
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m_FlipVertical = value;
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graphic.SetVerticesDirty();
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}
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}
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public override void ModifyMesh(VertexHelper vh)
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{
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if (!IsActive() || vh.currentVertCount == 0)
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{
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return;
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}
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var vertexs = new List<UIVertex>();
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vh.GetUIVertexStream(vertexs);
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if (flipHorizontal || flipVertical)
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{
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Flip(vertexs);
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}
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vh.Clear();
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vh.AddUIVertexTriangleStream(vertexs);
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}
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void Flip(List<UIVertex> vertexs)
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{
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var rect = graphic.GetPixelAdjustedRect();
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var count = vertexs.Count;
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for (int i = 0; i < count; i++)
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{
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var vertex = vertexs[i];
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var position = vertex.position;
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if (flipHorizontal)
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{
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position.x = -position.x + rect.max.x + rect.min.x;
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}
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if (flipVertical)
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{
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position.y = -position.y + rect.max.y + rect.min.y;
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}
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vertex.position = position;
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vertexs[i] = vertex;
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}
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}
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}
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