1.5 KiB
1.5 KiB
Polar Coordinates Node
Description
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.
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.
These values can be scaled by the values of inputs Radial Scale and Length Scale respectively.
Ports
| Name | Direction | Type | Binding | Description |
|---|---|---|---|---|
| UV | Input | Vector 2 | UV | Input UV value |
| Center | Input | Vector 2 | None | Center reference point |
| Radial Scale | Input | Float | None | Scale of distance value |
| Length Scale | Input | Float | None | Scale of angle value |
| Out | Output | Vector 2 | None | Output value |
Generated Code Example
The following example code represents one possible outcome of this node.
void Unity_PolarCoordinates_float(float2 UV, float2 Center, float RadialScale, float LengthScale, out float2 Out)
{
float2 delta = UV - Center;
float radius = length(delta) * 2 * RadialScale;
float angle = atan2(delta.x, delta.y) * 1.0/6.28 * LengthScale;
Out = float2(radius, angle);
}