unity shader 从左到右渐变色
时间: 2023-08-13 11:07:09 浏览: 99
回答: 要实现Unity Shader中从左到右的渐变色效果,可以使用以下方法。首先,你可以在Shader中定义两个颜色变量,分别表示左边和右边的颜色。然后,在片段着色器中,使用lerp函数将这两个颜色根据像素位置的灰度值进行插值,从而实现从左到右的渐变色效果。具体的代码如下所示:
```
fixed4 frag (v2f i) : SV_Target {
fixed4 col = tex2D(_MainTex, i.uv);
fixed gray = dot(col.rgb, fixed3(0.299, 0.587, 0.114));
col.rgb = lerp(_LeftColor, _RightColor, gray);
return col;
}
```
在这段代码中,_MainTex表示输入的纹理,col表示从纹理中采样得到的颜色。通过计算col的灰度值,然后使用lerp函数将_LeftColor和_RightColor进行插值,得到最终的颜色值。这样就可以实现从左到右的渐变色效果了。\[3\]
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