36 lines
1.5 KiB
Markdown
36 lines
1.5 KiB
Markdown
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# Checkerboard Node
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## Description
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Generates a checkerboard of alternating colors between inputs **Color A** and **Color B** based on input **UV**. The checkerboard scale is defined by input **Frequency**.
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## Ports
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| Name | Direction | Type | Binding | Description |
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|:------------ |:-------------|:-----|:---|:---|
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| UV | Input | Vector 2 | UV | Input UV value |
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| Color A | Input | Color RGB | None | First checker color |
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| Color B | Input | Color RGB | None | Second checker color |
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| Frequency | Input | Vector 2 | None | Scale of checkerboard per axis |
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| Out | Output | Vector 2 | None | Output UV value |
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## Generated Code Example
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The following example code represents one possible outcome of this node.
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```
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void Unity_Checkerboard_float(float2 UV, float3 ColorA, float3 ColorB, float2 Frequency, out float3 Out)
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{
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UV = (UV.xy + 0.5) * Frequency;
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float4 derivatives = float4(ddx(UV), ddy(UV));
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float2 duv_length = sqrt(float2(dot(derivatives.xz, derivatives.xz), dot(derivatives.yw, derivatives.yw)));
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float width = 1.0;
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float2 distance3 = 4.0 * abs(frac(UV + 0.25) - 0.5) - width;
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float2 scale = 0.35 / duv_length.xy;
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float freqLimiter = sqrt(clamp(1.1f - max(duv_length.x, duv_length.y), 0.0, 1.0));
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float2 vector_alpha = clamp(distance3 * scale.xy, -1.0, 1.0);
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float alpha = saturate(0.5f + 0.5f * vector_alpha.x * vector_alpha.y * freqLimiter);
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Out = lerp(ColorA, ColorB, alpha.xxx);
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}
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```
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