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| // 全象限
uv.y = 1.0 - uv.y;
uv = uv * 2 - 1;
// (-5,5)
const int uvScale = 5;
uv = uv * uvScale;
// 绘制坐标轴
half axis = smoothstep(0.01, 0.0, abs(uv.y)) + smoothstep(0.01, 0.0, abs(uv.x)); // 绘制 y=0 x=0
// 绘制坐标网格
half mesh = smoothstep(0.01, -0.01, abs((uv.y - 1) / uvScale)) + smoothstep(0.01, -0.01, abs((uv.y + 1) / uvScale))
+ smoothstep(0.01, -0.01, abs((uv.y - 2) / uvScale)) + smoothstep(0.01, -0.01, abs((uv.y + 2) / uvScale))
+ smoothstep(0.01, -0.01, abs((uv.y - 3) / uvScale)) + smoothstep(0.01, -0.01, abs((uv.y + 3) / uvScale))
+ smoothstep(0.01, -0.01, abs((uv.y - 4) / uvScale)) + smoothstep(0.01, -0.01, abs((uv.y + 4) / uvScale))
+ smoothstep(0.01, -0.01, abs((uv.x - 1) / uvScale)) + smoothstep(0.01, -0.01, abs((uv.x + 1) / uvScale))
+ smoothstep(0.01, -0.01, abs((uv.x - 2) / uvScale)) + smoothstep(0.01, -0.01, abs((uv.x + 2) / uvScale))
+ smoothstep(0.01, -0.01, abs((uv.x - 3) / uvScale)) + smoothstep(0.01, -0.01, abs((uv.x + 3) / uvScale))
+ smoothstep(0.01, -0.01, abs((uv.x - 4) / uvScale)) + smoothstep(0.01, -0.01, abs((uv.x + 4) / uvScale));
// 绘制函数 y = x^5
half func = uv.y - pow(uv.x, 5);
// 绘制
half plot = smoothstep(lerp(0.001, 0.02, length(uv)), 0.0, abs(func / uvScale));
return half3(axis + mesh, axis + mesh, axis + mesh) + half3(0, plot, 0);
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