Free Plugins for SketchUp

Superellipsoid Plugin

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Background

Superellipsoid

This plugin creates a superellipsoid. A superellipsoid varies between an ellipsoid (with a smooth round shape) and a rectangular box (with sharp corners). If all three dimensions are equal length, the shape varies between a sphere and a cube.

Basically, a superellipsoid is the 3D cousin of the superellipse. If you slice it horizontally or vertically, the cross-section is a superellipse. So, the superellipsoid has two measures of squareness: one for the horizontal superellipse cross-section, and one for the vertical superellipse cross-section.

The superellipsoids below have been arranged so that the horizontal cross-section gets more square-like as you move along the red axis, and the vertical cross-section gets more square-like as you move along the green axis.

Positive squareness values.

As described in the superellispe post, you can also consider negative squareness values. This gets more complicated, but it adds more variety. For the superellipsoids pictured below, the horizontal squareness values vary along the red axis from -90 to +90, and the vertical squareness values vary along the green axis from -90 to +90.

Squareness values -90% to +90%.

Usage

Superellipsoid dialog box.

This plugin is accessed from the Draw menu (Draw > Superellipsoid). This will open a dialog box to enter the superellipsoid parameter values.

There are two Squareness values. One for the horizontal superellipse cross-section, and one for the vertical cross-section. Each value is an integer between -99 and +99.

The latitude and longitude lines allow you to control how much geometry is created. The more lines, the smoother the surface.

When you click OK, the superellipsoid is created as a component, and the component placement tool is activated to position the superellipsoid in the model.

The dialog box remembers the values between SketchUp sessions.

Installation and Removal

Installation Questions? Please see this SketchUp Help Article. To remove the plugin, just delete the file from the SketchUp Plugins folder.