vArraySuperellipse
Generate points on a superellipse with separate X and Y amplitudes, an exponent, rotation and scale.
vArraySuperellipse has no input and outputs an array of XY points on a closed curve in the Z = 0 plane. The exponent moves the shape between a diamond, an ellipse and a rounded rectangle.
Parameters
| Parameter | Type | Default | Description |
|---|---|---|---|
| Amplitude X | Float | 0.25 | Half width of the shape before scale. Minimum 0.001, default 0.25. |
| Amplitude Y | Float | 0.25 | Half height of the shape before scale. Minimum 0.001, default 0.25. |
| Exponent | Float | 2 | Shape exponent. 2 gives an ellipse, 1 gives a diamond, larger values approach a rectangle. Clamped to 0.001 or more, default 2. |
| Sample Count | Integer | 360 | Number of points sampled over the curve. Clamped to 8 or more, default 360. |
| Rotation | Float | 0 | Angle the finished shape is turned around the origin, in degrees. Default 0. |
+1 more parameters
| Parameter | Type | Default | Description |
|---|---|---|---|
| Scale | Float | 1 | Multiplier applied to X and Y before rotation. Minimum 0.001, default 1. |
Read the full description
The node samples t from 0 to 2 * pi in Sample Count points, including both ends. With p = 2 / Exponent, each point is X = Amplitude X * sign(cos t) * |cos t|^p * Scale and Y = Amplitude Y * sign(sin t) * |sin t|^p * Scale. The point is then rotated around the origin by Rotation and written with Z = 0.
The points satisfy |x / Amplitude X|^Exponent + |y / Amplitude Y|^Exponent = 1 before scale and rotation. An Exponent of 2 gives an ellipse, 1 gives a diamond with straight edges, and larger values move the curve toward a rectangle.
With the defaults (Amplitude X and Y 0.25, Exponent 2, 360 samples, Rotation 0, Scale 1) the output is a circle of radius 0.25. The first and last points are the same point.
Exponent is clamped to 0.001 or more and Sample Count to 8 or more. Points are spaced evenly in the angle t, so they bunch up near the corners when the Exponent is large.
Example Connections
- Draw the shape
- Offset the shape before drawing
vArraySuperellipse.Output -> vArrayCameraProjection.ArrayA
vArrayCameraProjection.Output -> vArrayShapeRender.ArrayPoint
Background.Output -> vArrayShapeRender.Input
vArraySuperellipse.Output -> vArrayTranslate.ArrayA
vArrayTranslate.Output -> vArrayCameraProjection.ArrayA