57 lines
1.6 KiB
C#
57 lines
1.6 KiB
C#
using UnityEngine;
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using UnityEngine.UI;
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namespace ImageCropperNamespace
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{
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[RequireComponent( typeof( CanvasRenderer ) )]
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public class FadeOverlayGraphic : Graphic
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{
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private const float OFFSET = 20000f;
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[SerializeField]
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private Sprite renderSprite;
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private Vector2 uv = Vector2.zero;
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private Color32 color32;
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public override Texture mainTexture { get { return renderSprite != null ? renderSprite.texture : s_WhiteTexture; } }
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protected override void Awake()
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{
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base.Awake();
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if( renderSprite != null )
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{
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Vector4 packedUv = UnityEngine.Sprites.DataUtility.GetOuterUV( renderSprite );
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uv = new Vector2( packedUv.x + packedUv.z, packedUv.y + packedUv.w ) * 0.5f; // uv center point
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}
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}
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protected override void OnPopulateMesh( VertexHelper vh )
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{
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Rect r = GetPixelAdjustedRect();
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float xMin = r.x, xMax = r.x + r.width;
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float yMin = r.y, yMax = r.y + r.height;
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color32 = color;
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vh.Clear();
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GenerateMesh( vh, -OFFSET, yMax, OFFSET, OFFSET, 0 );
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GenerateMesh( vh, -OFFSET, -OFFSET, OFFSET, yMin, 4 );
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GenerateMesh( vh, -OFFSET, yMin, xMin, yMax, 8 );
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GenerateMesh( vh, xMax, yMin, OFFSET, yMax, 12 );
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}
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private void GenerateMesh( VertexHelper vh, float xMin, float yMin, float xMax, float yMax, int triangleIndex )
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{
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vh.AddVert( new Vector3( xMin, yMin ), color32, uv );
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vh.AddVert( new Vector3( xMin, yMax ), color32, uv );
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vh.AddVert( new Vector3( xMax, yMax ), color32, uv );
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vh.AddVert( new Vector3( xMax, yMin ), color32, uv );
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vh.AddTriangle( triangleIndex, triangleIndex + 1, triangleIndex + 2 );
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vh.AddTriangle( triangleIndex + 2, triangleIndex + 3, triangleIndex );
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}
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}
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} |