34 lines
1.5 KiB
Markdown
34 lines
1.5 KiB
Markdown
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# Polar Coordinates Node
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## Description
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Converts the value of input **UV** to polar coordinates. In mathematics, the polar coordinate system is a two-dimensional coordinate system in which each point on a plane is determined by a distance from a reference point and an angle from a reference direction.
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The resulting effect is that the x channel of the input to **UV** is converted to a distance value from the point specified by the value of input **Center** and the y channel of same input is converted to the value of an angle of rotation around that point.
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These values can be scaled by the values of inputs **Radial Scale** and **Length Scale** respectively.
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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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| Center | Input | Vector 2 | None | Center reference point |
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| Radial Scale | Input | Float | None | Scale of distance value |
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| Length Scale | Input | Float | None | Scale of angle value |
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| Out | Output | Vector 2 | None | Output 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_PolarCoordinates_float(float2 UV, float2 Center, float RadialScale, float LengthScale, out float2 Out)
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{
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float2 delta = UV - Center;
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float radius = length(delta) * 2 * RadialScale;
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float angle = atan2(delta.x, delta.y) * 1.0/6.28 * LengthScale;
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Out = float2(radius, angle);
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}
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```
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