效果图

参考代码

Shader"Custom/HexFlowImage"
{Properties{[PerRendererData] _MainTex ("Sprite Texture", 2D) = "white" {}_Color ("Tint", Color) = (1,1,1,1)_StencilComp ("Stencil Comparison", Float) = 8_Stencil ("Stencil ID", Float) = 0_StencilOp ("Stencil Operation", Float) = 0_StencilWriteMask ("Stencil Write Mask", Float) = 255_StencilReadMask ("Stencil Read Mask", Float) = 255_ColorMask ("Color Mask", Float) = 15/*六边形参数*/_HexLineSize("HexLineSize",Range(0.02,0.2)) = 0.05       //线条粗细_HexZoom("HexZoom",Range(5,50)) = 10                     //六边形缩放/*流光参数*/_Angle("Angle",Range(0,3.1415926))=0                     //坐标系旋转角度_LineStrength("LineStrength",Range(0.01,0.99))=0.1       //流光线条粗细_LineEdge("LineEdge",Range(0,0.1))=0.01                  //流光边界过度粗细_LineOffset("LineOffset",Range(0,1))=0.5                 //流光坐标偏移_LineSpeed("MoveSpeed",float) =1                         //流光移动速度_LineColor("Color",Color)=(1,1,1,1)                      //流光颜色[Toggle(UNITY_UI_ALPHACLIP)] _UseUIAlphaClip ("Use Alpha Clip", Float) = 0}SubShader{Tags{"Queue"="Transparent""IgnoreProjector"="True""RenderType"="Transparent""PreviewType"="Plane""CanUseSpriteAtlas"="True"}Stencil{Ref[_Stencil]Comp [_StencilComp]Pass [_StencilOp]ReadMask[_StencilReadMask]WriteMask [_StencilWriteMask]}Cull OffLighting OffZWrite OffZTest[unity_GUIZTestMode]Blend OneOneMinusSrcAlphaColorMask[_ColorMask]Pass{Name"Default"CGPROGRAM#pragma vertex vert#pragma fragment frag#pragma target 2.0#include "UnityCG.cginc"#include "UnityUI.cginc"#pragma multi_compile_local _ UNITY_UI_CLIP_RECT#pragma multi_compile_local _ UNITY_UI_ALPHACLIP#define aspec _ScreenParams.x/_ScreenParams.y                          /*屏幕长款比例*/                                   #define rot float2x2(cos(_Angle),sin(_Angle),-sin(_Angle),cos(_Angle)) /*旋转矩阵*/        struct appdata_t{float4 vertex : POSITION;float4 color : COLOR;float2 texcoord : TEXCOORD0;UNITY_VERTEX_INPUT_INSTANCE_ID};struct v2f{float4 vertex : SV_POSITION;fixed4 color : COLOR;float2 texcoord : TEXCOORD0;float4 worldPosition : TEXCOORD1;float4 mask : TEXCOORD2;float2 viewTexcoord : TEXTCOORD3;   //屏幕坐标UNITY_VERTEX_OUTPUT_STEREO};sampler2D _MainTex;fixed4 _Color;fixed4 _TextureSampleAdd;float4 _ClipRect;float4 _MainTex_ST;float _UIMaskSoftnessX;float _UIMaskSoftnessY;float _HexLineSize;float _HexZoom;float _Angle;float _LineStrength;float _LineEdge;float _LineOffset;float _LineSpeed;fixed4 _LineColor;float HexDist(fixed2 p){p = abs(p);float c = dot(p, normalize(fixed2(1, 1.73)));c = max(c, p.x);return c;}fixed4 HexCoords(fixed2 uv){const fixed2 r = fixed2(1, 1.73);const fixed2 h = r * .5;fixed2 a = fmod(uv, r) - h;fixed2 b = fmod(uv - h, r) - h;  fixed2 gv = dot(a, a) < dot(b, b) ? a : b;float x = atan2(gv.x, gv.y);float y = .5 - HexDist(gv);fixed2 id = uv - gv;return fixed4(x, y, id.x, id.y);}v2f vert(appdata_t v){v2f OUT;UNITY_SETUP_INSTANCE_ID(v);UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO(OUT);float4 vPosition = UnityObjectToClipPos(v.vertex);OUT.worldPosition = v.vertex;OUT.vertex = vPosition;float2 pixelSize = vPosition.w;pixelSize /= float2(1, 1) * abs(mul((float2x2) UNITY_MATRIX_P, _ScreenParams.xy));float4 clampedRect = clamp(_ClipRect, -2e10, 2e10);float2 maskUV = (v.vertex.xy - clampedRect.xy) / (clampedRect.zw - clampedRect.xy);OUT.texcoord = TRANSFORM_TEX(v.texcoord.xy, _MainTex);OUT.mask = float4(v.vertex.xy * 2 - clampedRect.xy - clampedRect.zw, 0.25 / (0.25 * half2(_UIMaskSoftnessX, _UIMaskSoftnessY) + abs(pixelSize.xy)));OUT.color = v.color;//计算屏幕坐标fixed4 vpos = ComputeScreenPos(OUT.vertex);OUT.viewTexcoord = vpos.xy / vpos.w;OUT.viewTexcoord.x *= aspec;OUT.viewTexcoord += 0.5;return OUT;}fixed4 frag(v2f IN) : SV_Target{const half alphaPrecision = half(0xff);const half invAlphaPrecision = half(1.0 / alphaPrecision);IN.color.a = round(IN.color.a * alphaPrecision) * invAlphaPrecision;//获取屏幕坐标 计算六边形像素float2 uv1 = IN.viewTexcoord + float2(0, sin(IN.viewTexcoord.x * 5. + _Time.y) * 0.01);half4 hex = smoothstep(_HexLineSize, .0, HexCoords(uv1 * _HexZoom).y) * IN.color.a;//旋转屏幕坐标计算流光像素float2 uv2 =   mul(rot,IN.viewTexcoord.xy);uv2.x +=  _Time.y * _LineSpeed;uv2.x = frac(uv2.x);float d = smoothstep(_LineOffset,_LineOffset + _LineEdge,uv2.x) * smoothstep(_LineOffset + _LineStrength,_LineOffset + _LineStrength - _LineEdge,uv2.x);//通过lerp函数进行差值融合 再与原始图像进行叠加half4 color = lerp( IN.color * hex , hex  * _LineColor,d)+ tex2D(_MainTex, IN.texcoord);#ifdef UNITY_UI_CLIP_RECThalf2 m = saturate((_ClipRect.zw - _ClipRect.xy - abs(IN.mask.xy)) * IN.mask.zw);color.a *= m.x * m.y;
#endif#ifdef UNITY_UI_ALPHACLIPclip (color.a - 0.001);
#endifcolor.rgb *= color.a;return color;}ENDCG}}
}