unity3d：text描边

小灰灰 2022-12-17 08:56 176阅读 0赞

using UnityEngine;
    using System.Collections.Generic;
    using UnityEngine.UI;
    
    namespace Effects
    { 
        [RequireComponent(typeof(Text))]
        [AddComponentMenu("UI/Effects/BoldOutline")]
        public class BoldOutline : Shadow
        { 
            public bool IsEcoMode = true;
            public static List<UIVertex> verts = new List<UIVertex>();
            const int OUTLINE_BUDGET = 50;
            static int frameNo = 0;
            static int iBudgetUsed = 0;
    
    
            public override void ModifyMesh(VertexHelper vh)
            { 
                bool bIsBudgetEnough = true;
                if(Time.frameCount ==frameNo)
                { 
                    if (iBudgetUsed >= OUTLINE_BUDGET)
                    { 
                        bIsBudgetEnough = false;
                    }
                    else
                    { 
                        iBudgetUsed++;
                    }
                }
                else
                { 
                    frameNo = Time.frameCount;
                    iBudgetUsed = 0;
                }
                
                if (!IsActive())
                    return;
    
                verts.Clear();
                vh.GetUIVertexStream(verts);
    
                var neededCpacity = verts.Count * 5;
                if (verts.Capacity < neededCpacity)
                    verts.Capacity = neededCpacity;
    
                var start = 0;
                var end = verts.Count;
                ApplyShadowZeroAlloc(verts, effectColor, start, verts.Count, effectDistance.x, effectDistance.y);
    
                start = end;
                end = verts.Count;
                ApplyShadowZeroAlloc(verts, effectColor, start, verts.Count, -effectDistance.x, -effectDistance.y);
    
                if(bIsBudgetEnough)
                { 
                    start = end;
                    end = verts.Count;
                    ApplyShadowZeroAlloc(verts, effectColor, start, verts.Count, effectDistance.x, -effectDistance.y);
    
                    start = end;
                    end = verts.Count;
                    ApplyShadowZeroAlloc(verts, effectColor, start, verts.Count, -effectDistance.x, effectDistance.y);
                }
               
                if(!IsEcoMode)
                { 
                    start = end;
                    end = verts.Count;
                    ApplyShadowZeroAlloc(verts, effectColor, start, verts.Count, effectDistance.x, 0);
    
                    start = end;
                    end = verts.Count;
                    ApplyShadowZeroAlloc(verts, effectColor, start, verts.Count, -effectDistance.x, 0);
    
                    start = end;
                    end = verts.Count;
                    ApplyShadowZeroAlloc(verts, effectColor, start, verts.Count, 0, effectDistance.y);
    
                    start = end;
                    end = verts.Count;
                    ApplyShadowZeroAlloc(verts, effectColor, start, verts.Count, 0, -effectDistance.y);
                }
                vh.Clear();
                vh.AddUIVertexTriangleStream(verts);
                verts.Clear();
            }
        }
    }