com.unity.uiextensions/Scripts/Effects/NicerOutline.cs

/// Credit Melang
/// Sourced from - http://forum.unity3d.com/members/melang.593409/

using System.Collections.Generic;
namespace UnityEngine.UI.Extensions
{
	//An outline that looks a bit nicer than the default one. It has less "holes" in the outline by drawing more copies of the effect
	[AddComponentMenu("UI/Effects/Extensions/Nicer Outline")]
	public class NicerOutline : BaseVertexEffect
	{
		[SerializeField]
		private Color m_EffectColor = new Color (0f, 0f, 0f, 0.5f);
		
		[SerializeField]
		private Vector2 m_EffectDistance = new Vector2 (1f, -1f);
		
		[SerializeField]
		private bool m_UseGraphicAlpha = true;
		//
		// Properties
		//
		public Color effectColor
		{
			get
			{
				return this.m_EffectColor;
			}
			set
			{
				this.m_EffectColor = value;
				if (base.graphic != null)
				{
					base.graphic.SetVerticesDirty ();
				}
			}
		}
		
		public Vector2 effectDistance
		{
			get
			{
				return this.m_EffectDistance;
			}
			set
			{
				if (value.x > 600f)
				{
					value.x = 600f;
				}
				if (value.x < -600f)
				{
					value.x = -600f;
				}
				if (value.y > 600f)
				{
					value.y = 600f;
				}
				if (value.y < -600f)
				{
					value.y = -600f;
				}
				if (this.m_EffectDistance == value)
				{
					return;
				}
				this.m_EffectDistance = value;
				if (base.graphic != null)
				{
					base.graphic.SetVerticesDirty ();
				}
			}
		}
		
		public bool useGraphicAlpha
		{
			get
			{
				return this.m_UseGraphicAlpha;
			}
			set
			{
				this.m_UseGraphicAlpha = value;
				if (base.graphic != null)
				{
					base.graphic.SetVerticesDirty ();
				}
			}
		}
		

		//
		// Methods
		//
		protected void ApplyShadow (List<UIVertex> verts, Color32 color, int start, int end, float x, float y)
		{
			//Debug.Log("verts count: "+verts.Count);
			int num = verts.Count * 2;
			if (verts.Capacity < num)
			{
				verts.Capacity = num;
			}
			for (int i = start; i < end; i++)
			{
				UIVertex uIVertex = verts [i];
				verts.Add (uIVertex);

				Vector3 position = uIVertex.position;
				//Debug.Log("vertex pos: "+position);
				position.x += x;
				position.y += y;
				uIVertex.position = position;
				Color32 color2 = color;
				if (this.m_UseGraphicAlpha)
				{
					color2.a = (byte)(color2.a * verts [i].color.a / 255);
				}
				uIVertex.color = color2;
				//uIVertex.color = (Color32)Color.blue;
				verts [i] = uIVertex;
			}
		}
		
		public override void ModifyVertices (List<UIVertex> verts)
		{
			if (!this.IsActive ())
			{
				return;
			}

			Text foundtext = GetComponent<Text>();
			
			float best_fit_adjustment = 1f;
			
			if (foundtext && foundtext.resizeTextForBestFit)  
			{
				best_fit_adjustment = (float)foundtext.cachedTextGenerator.fontSizeUsedForBestFit / (foundtext.resizeTextMaxSize-1); //max size seems to be exclusive 

			}

			float distanceX = this.effectDistance.x * best_fit_adjustment;
			float distanceY = this.effectDistance.y * best_fit_adjustment;

			int start = 0;
			int count = verts.Count;
			this.ApplyShadow (verts, this.effectColor, start, verts.Count, distanceX, distanceY);
			start = count;
			count = verts.Count;
			this.ApplyShadow (verts, this.effectColor, start, verts.Count, distanceX, -distanceY);
			start = count;
			count = verts.Count;
			this.ApplyShadow (verts, this.effectColor, start, verts.Count, -distanceX, distanceY);
			start = count;
			count = verts.Count;
			this.ApplyShadow (verts, this.effectColor, start, verts.Count, -distanceX, -distanceY);

			start = count;
			count = verts.Count;
			this.ApplyShadow (verts, this.effectColor, start, verts.Count, distanceX, 0);
			start = count;
			count = verts.Count;
			this.ApplyShadow (verts, this.effectColor, start, verts.Count, -distanceX, 0);

			start = count;
			count = verts.Count;
			this.ApplyShadow (verts, this.effectColor, start, verts.Count, 0, distanceY);
			start = count;
			count = verts.Count;
			this.ApplyShadow (verts, this.effectColor, start, verts.Count, 0, -distanceY);
		}

#if UNITY_EDITOR
		protected override void OnValidate ()
		{
			this.effectDistance = this.m_EffectDistance;
			base.OnValidate ();
		}
#endif
	}
}