SoftShadow.cs

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using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
 
[AddComponentMenu("UI/ToJ Effects/Soft Shadow", 3)]
[RequireComponent(typeof(Text))]
public class SoftShadow : Shadow
{
    [SerializeField]
    private float m_BlurSpread = 1f;
 
    [SerializeField]
    private bool m_OnlyInitialCharactersDropShadow = true;
 
    private List<UIVertex> m_Verts = new List<UIVertex>();
 
    public float blurSpread
    {
        get
        {
            return m_BlurSpread;
        }
        set
        {
            m_BlurSpread = value;
            if (base.graphic != null)
            {
                base.graphic.SetVerticesDirty();
            }
        }
    }
 
    public bool onlyInitialCharactersDropShadow
    {
        get
        {
            return m_OnlyInitialCharactersDropShadow;
        }
        set
        {
            m_OnlyInitialCharactersDropShadow = value;
            if (base.graphic != null)
            {
                base.graphic.SetVerticesDirty();
            }
        }
    }
 
    protected SoftShadow()
    {
    }
 
    public override void ModifyMesh(VertexHelper vh)
    {
        if (!IsActive())
        {
            return;
        }
        vh.GetUIVertexStream(m_Verts);
        int count = m_Verts.Count;
        Text component = GetComponent<Text>();
        int num = 0;
        int num2 = m_Verts.Count;
        if (m_OnlyInitialCharactersDropShadow)
        {
            num = m_Verts.Count - component.cachedTextGenerator.characterCountVisible * 6;
            num2 = component.cachedTextGenerator.characterCountVisible * 6;
        }
        Color color = base.effectColor;
        color.a /= 4f;
        int start = num;
        int count2 = m_Verts.Count;
        ApplyShadowZeroAlloc(m_Verts, color, start, m_Verts.Count, base.effectDistance.x, base.effectDistance.y);
        for (int i = -1; i <= 1; i++)
        {
            for (int j = -1; j <= 1; j++)
            {
                if (i != 0 || j != 0)
                {
                    start = count2;
                    count2 = m_Verts.Count;
                    ApplyShadowZeroAlloc(m_Verts, color, start, m_Verts.Count, base.effectDistance.x + (float)i * blurSpread, base.effectDistance.y + (float)j * blurSpread);
                }
            }
        }
        if (onlyInitialCharactersDropShadow)
        {
            List<UIVertex> range = m_Verts.GetRange(0, count - num2);
            m_Verts.RemoveRange(0, count - num2);
            m_Verts.InsertRange(m_Verts.Count - num2, range);
        }
        if (component.material.shader == Shader.Find("Text Effects/Fancy Text"))
        {
            for (int k = 0; k < m_Verts.Count - count; k++)
            {
                UIVertex value = m_Verts[k];
                value.uv1 = new Vector2(0f, 0f);
                m_Verts[k] = value;
            }
        }
        vh.Clear();
        vh.AddUIVertexTriangleStream(m_Verts);
    }
}