111 lines
4.4 KiB
C#
111 lines
4.4 KiB
C#
/// Credit Breyer
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/// Sourced from - http://forum.unity3d.com/threads/scripts-useful-4-6-scripts-collection.264161/#post-1780095
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using System.Collections.Generic;
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namespace UnityEngine.UI.Extensions
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{
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[AddComponentMenu("UI/Effects/Extensions/Gradient")]
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public class Gradient : BaseMeshEffect
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{
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public GradientMode gradientMode = GradientMode.Global;
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public GradientDir gradientDir = GradientDir.Vertical;
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public bool overwriteAllColor = false;
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public Color vertex1 = Color.white;
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public Color vertex2 = Color.black;
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private Graphic targetGraphic;
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protected override void Start()
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{
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targetGraphic = GetComponent<Graphic>();
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}
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public override void ModifyMesh(Mesh mesh)
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{
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if (!IsActive() || mesh.vertexCount == 0)
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{
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return;
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}
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Vector3[] vertexList = mesh.vertices;
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Color[] vertexListColors = mesh.colors;
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int count = mesh.vertexCount;
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Vector3 uiVertex = vertexList[0];
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Color uiVertexColor = vertexListColors[0];
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if (gradientMode == GradientMode.Global)
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{
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if (gradientDir == GradientDir.DiagonalLeftToRight || gradientDir == GradientDir.DiagonalRightToLeft)
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{
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#if UNITY_EDITOR
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Debug.LogWarning("Diagonal dir is not supported in Global mode");
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#endif
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gradientDir = GradientDir.Vertical;
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}
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float bottomY = gradientDir == GradientDir.Vertical ? vertexList[vertexList.Length - 1].y : vertexList[vertexList.Length - 1].x;
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float topY = gradientDir == GradientDir.Vertical ? vertexList[0].y : vertexList[0].x;
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float uiElementHeight = topY - bottomY;
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for (int i = 0; i < count; i++)
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{
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uiVertex = vertexList[i];
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uiVertexColor = vertexListColors[i];
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if (!overwriteAllColor && uiVertexColor != targetGraphic.color)
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continue;
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uiVertexColor *= Color.Lerp(vertex2, vertex1, ((gradientDir == GradientDir.Vertical ? uiVertex.y : uiVertex.x) - bottomY) / uiElementHeight);
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vertexListColors[i] = uiVertexColor;
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}
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}
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else
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{
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for (int i = 0; i < count; i++)
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{
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uiVertex = vertexList[i];
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uiVertexColor = vertexListColors[i];
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if (!overwriteAllColor && !CompareCarefully(uiVertexColor, targetGraphic.color))
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continue;
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switch (gradientDir)
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{
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case GradientDir.Vertical:
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uiVertexColor *= (i % 4 == 0 || (i - 1) % 4 == 0) ? vertex1 : vertex2;
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break;
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case GradientDir.Horizontal:
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uiVertexColor *= (i % 4 == 0 || (i - 3) % 4 == 0) ? vertex1 : vertex2;
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break;
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case GradientDir.DiagonalLeftToRight:
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uiVertexColor *= (i % 4 == 0) ? vertex1 : ((i - 2) % 4 == 0 ? vertex2 : Color.Lerp(vertex2, vertex1, 0.5f));
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break;
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case GradientDir.DiagonalRightToLeft:
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uiVertexColor *= ((i - 1) % 4 == 0) ? vertex1 : ((i - 3) % 4 == 0 ? vertex2 : Color.Lerp(vertex2, vertex1, 0.5f));
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break;
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}
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vertexListColors[i] = uiVertexColor;
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}
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}
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mesh.colors = vertexListColors;
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}
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private bool CompareCarefully(Color col1, Color col2)
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{
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if (Mathf.Abs(col1.r - col2.r) < 0.003f && Mathf.Abs(col1.g - col2.g) < 0.003f && Mathf.Abs(col1.b - col2.b) < 0.003f && Mathf.Abs(col1.a - col2.a) < 0.003f)
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return true;
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return false;
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}
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}
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public enum GradientMode
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{
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Global,
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Local
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}
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public enum GradientDir
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{
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Vertical,
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Horizontal,
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DiagonalLeftToRight,
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DiagonalRightToLeft
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//Free
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}
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//enum color mode Additive, Multiply, Overwrite
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} |