120 lines
3.8 KiB
C#
120 lines
3.8 KiB
C#
/// Credit NemoKrad (aka Charles Humphrey)
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/// Sourced from - http://www.randomchaos.co.uk/SoftAlphaUIMask.aspx
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namespace UnityEngine.UI.Extensions
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{
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[ExecuteInEditMode]
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[AddComponentMenu("UI/Effects/Extensions/SoftMaskScript")]
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public class SoftMaskScript : MonoBehaviour
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{
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Material mat;
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Canvas cachedCanvas= null;
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[Tooltip("The area that is to be used as the container.")]
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public RectTransform MaskArea;
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RectTransform myRect;
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[Tooltip("Texture to be used to do the soft alpha")]
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public Texture AlphaMask;
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[Tooltip("At what point to apply the alpha min range 0-1")]
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[Range(0, 1)]
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public float CutOff = 0;
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[Tooltip("Implement a hard blend based on the Cutoff")]
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public bool HardBlend = false;
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[Tooltip("Flip the masks alpha value")]
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public bool FlipAlphaMask = false;
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[Tooltip("If Mask Scals Rect is given, and this value is true, the area around the mask will not be clipped")]
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public bool DontClipMaskScalingRect = false;
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Vector3[] worldCorners = new Vector3[4];
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Vector2 maskOffset = Vector2.zero;
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Vector2 maskScale = Vector2.one;
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bool isText = false;
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// Use this for initialization
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void Start()
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{
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myRect = GetComponent<RectTransform>();
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if (MaskArea == null)
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{
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MaskArea = myRect;
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}
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if (GetComponent<Graphic>() != null)
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{
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mat = new Material(Shader.Find("UI Extensions/SoftMaskShader"));
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GetComponent<Graphic>().material = mat;
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}
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if (GetComponent<Text>())
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{
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isText = true;
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mat = new Material(Shader.Find("UI Extensions/SoftMaskShaderText"));
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GetComponent<Text>().material = mat;
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GetCanvas();
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// For some reason, having the mask control on the parent and disabled stops the mouse interacting
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// with the texture layer that is not visible.. Not needed for the Image.
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if (transform.parent.GetComponent<Mask>() == null)
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transform.parent.gameObject.AddComponent<Mask>();
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transform.parent.GetComponent<Mask>().enabled = false;
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}
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}
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void GetCanvas()
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{
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Transform t = transform;
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int lvlLimit = 100;
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int lvl = 0;
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while (cachedCanvas == null && lvl < lvlLimit)
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{
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cachedCanvas = t.gameObject.GetComponent<Canvas>();
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if (cachedCanvas == null)
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t = GetParentTranform(t);
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lvl++;
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}
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}
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Transform GetParentTranform(Transform t)
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{
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return t.parent;
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}
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void Update()
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{
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SetMask();
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}
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void SetMask()
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{
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var maskRectXform = MaskArea;
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MaskArea.GetWorldCorners(worldCorners);
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var size = (worldCorners[2] - worldCorners[0]);
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maskScale.Set(1.0f / size.x, 1.0f / size.y);
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maskOffset = -worldCorners[0];
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maskOffset.Scale(maskScale);
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mat.SetTextureOffset("_AlphaMask", maskOffset);
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mat.SetTextureScale("_AlphaMask", maskScale);
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mat.SetTexture("_AlphaMask", AlphaMask);
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mat.SetFloat("_HardBlend", HardBlend ? 1 : 0);
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mat.SetInt("_FlipAlphaMask", FlipAlphaMask ? 1 : 0);
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mat.SetInt("_NoOuterClip", DontClipMaskScalingRect ? 1 : 0);
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mat.SetFloat("_CutOff", CutOff);
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}
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}
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} |