UE5 动态扫描波

UE5自定义mesh，自定义材质实现动态扫描效果。

一、效果

二、实现

一、创建mesh

二、创建材质

三、着色器代码

float4 rgb = float4(baseColor.x,baseColor.y,baseColor.z,0.3);
{float startLength = frac(time/1.0)*radius;//[0.1,0.9]float endLength = startLength+width;float halfWidth = (endLength - startLength)/2.0;float curLength = length(pos.xy);float centerLength = startLength + halfWidth;if(curLength > startLength && curLength < endLength){float disToCenter = abs(curLength-centerLength);return  lerp(rgb,baseColor,disToCenter / halfWidth);}
}{float startLength = frac(time/1.0+0.2)*radius;//[0.1,0.9]float endLength = startLength+width;float halfWidth = (endLength - startLength)/2.0;float curLength = length(pos.xy);float centerLength = startLength + halfWidth;if(curLength > startLength && curLength < endLength){float disToCenter = abs(curLength-centerLength);return  lerp(rgb,baseColor,disToCenter / halfWidth);}
}{float startLength = frac(time/1.0+0.4)*radius;//[0.1,0.9]float endLength = startLength+width;float halfWidth = (endLength - startLength)/2.0;float curLength = length(pos.xy);float centerLength = startLength + halfWidth;if(curLength > startLength && curLength < endLength){float disToCenter = abs(curLength-centerLength);return  lerp(rgb,baseColor,disToCenter / halfWidth);}
}{float startLength = frac(time/1.0+0.6)*radius;//[0.1,0.9]float endLength = startLength+width;float halfWidth = (endLength - startLength)/2.0;float curLength = length(pos.xy);float centerLength = startLength + halfWidth;if(curLength > startLength && curLength < endLength){float disToCenter = abs(curLength-centerLength);return  lerp(rgb,baseColor,disToCenter / halfWidth);}
}{float startLength = frac(time/1.0+0.8)*radius;//[0.1,0.9]float endLength = startLength+width;float halfWidth = (endLength - startLength)/2.0;float curLength = length(pos.xy);float centerLength = startLength + halfWidth;if(curLength > startLength && curLength < endLength){float disToCenter = abs(curLength-centerLength);return  lerp(rgb,baseColor,disToCenter / halfWidth);}
}return  baseColor;