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31 lines
1.1 KiB
Markdown
31 lines
1.1 KiB
Markdown
# Swirl node
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Applies a swirl warping effect similar to a black hole to the value of input UV. Very similar to <b><i>[Twirl node](/documentation/Nodes/UV/Twirl.md)</b></i>, key difference is it uses the inverse of vector length (One minus).<br><br><i>Default value for uv input will be vec2(0, 0) for shader modes <i>PARTICLES</i>, <i>SKY</i> and <i>FOG</i> to avoid errors becouse UV variable is not available for these modes.</i>
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<hr>
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**Inputs**
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|Name|Type|Binding|Description|
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|---|---|---|---|
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|uv|vec2|UV|Input UV value|
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|center|vec2|none|Center reference point|
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|strength|float|none|Strength of the effect|
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|offset|vec2|none|Individual channel offsets|
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**Outputs**
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|Name|Type|Binding|Description|
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|---|---|---|---|
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|uv|vec2|None|Output UV value|
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**ShaderInc location**
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<br>`res://addons/ShaderLib/UV/SwirlUV.gdshaderinc`
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**Method signature**
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<br>`vec2 swirl_uv(vec2 uv, vec2 center, float strength, vec2 offset)`
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**Parameters**
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|Name|Type|Description|
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|---|---|---|
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|uv|vec2|Input uv|
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|center|vec2|Center reference point|
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|strength|float|Strength of the effect|
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|offset|vec2|Individual channel offsets|
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