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Assets/Resources/Circle/ImageWithIndependentRoundedCorners.cs

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+using System;
+using UnityEngine;
+using UnityEngine.UI;
+
+[ExecuteInEditMode]
+public class ImageWithIndependentRoundedCorners : MonoBehaviour {
+	
+	public Vector4 r;
+	private Material material;
+	
+	// xy - position,
+	// zw - halfSize
+	[HideInInspector, SerializeField] private Vector4 rect2props;
+
+	private readonly int prop_halfSize = Shader.PropertyToID("_halfSize");
+	private readonly int prop_radiuses = Shader.PropertyToID("_r");
+	private readonly int prop_rect2props = Shader.PropertyToID("_rect2props");
+	
+	// Vector2.right rotated clockwise by 45 degrees
+	private static readonly Vector2 wNorm = new Vector2(.7071068f, -.7071068f);
+	// Vector2.right rotated counter-clockwise by 45 degrees
+	private static readonly Vector2 hNorm = new Vector2(.7071068f, .7071068f);
+
+    private void Start()
+    {
+		Refresh();
+    }
+    void OnRectTransformDimensionsChange(){
+		Refresh();
+	}
+	
+	private void OnValidate(){
+		Refresh();
+	}
+	
+	private void RecalculateProps(Vector2 size){
+
+		// Vector that goes from left to right sides of rect2
+		var aVec = new Vector2(size.x, -size.y + r.x + r.z);
+
+		// Project vector aVec to wNorm to get magnitude of rect2 width vector
+		var halfWidth = Vector2.Dot(aVec, wNorm) * .5f;
+		rect2props.z = halfWidth;
+		
+		
+		// Vector that goes from bottom to top sides of rect2
+		var bVec = new Vector2(size.x, size.y - r.w - r.y);
+		
+		// Project vector bVec to hNorm to get magnitude of rect2 height vector
+		var halfHeight = Vector2.Dot(bVec, hNorm) * .5f;
+		rect2props.w = halfHeight;
+		
+		
+		// Vector that goes from left to top sides of rect2
+		var efVec = new Vector2(size.x - r.x - r.y, 0);
+		// Vector that goes from point E to point G, which is top-left of rect2
+		var egVec = hNorm * Vector2.Dot(efVec, hNorm);
+		// Position of point E relative to center of coord system
+		var ePoint = new Vector2(r.x - (size.x / 2), size.y / 2);
+		// Origin of rect2 relative to center of coord system
+		// ePoint + egVec == vector to top-left corner of rect2
+		// wNorm * halfWidth + hNorm * -halfHeight == vector from top-left corner to center
+		var origin = ePoint + egVec + wNorm * halfWidth + hNorm * -halfHeight;
+		rect2props.x = origin.x;
+		rect2props.y = origin.y;
+	}
+
+	private void Refresh(){
+		if (material == null)
+		{
+			material = Instantiate(Resources.Load<Material>("UI/Material/IndependentCornersMaterial"));
+		}
+		var rect = ((RectTransform) transform).rect;
+		RecalculateProps(rect.size);
+		material.SetVector(prop_rect2props, rect2props);
+		material.SetVector(prop_halfSize, rect.size * .5f);
+		material.SetVector(prop_radiuses, r);
+		if (gameObject.GetComponent<Image>() != null)
+		{
+			gameObject.GetComponent<Image>().material = material;
+			gameObject.GetComponent<Image>().sprite = null;
+		}
+		else if (gameObject.GetComponent<RawImage>() != null)
+		{
+			gameObject.GetComponent<RawImage>().material = material;
+		}
+	}
+
+}