What is the Inkscape Star and Polygon Tool?

The Star and Polygon tool in Inkscape is a powerful vector creation feature used to generate precise geometric shapes, ranging from simple triangles and hexagons to complex stars and spirograph-like designs. By adjusting specific parameters such as corners, spoke ratios, and roundedness, users can dynamically transform basic shapes into intricate digital artwork. This article explores the primary functions of the tool, its core settings, and how to manipulate it for efficient vector design.

Core Functions and Shape Creation

The primary function of the Star and Polygon tool is to allow designers to create multi-sided shapes instantly without drawing individual paths. Located in the left-hand toolbar (or accessed via the Shift + F9 shortcut), the tool operates in two distinct modes:

• Regular Polygon Mode: Creates closed geometric shapes with equal sides and angles, such as pentagons, octagons, and decagons.
• Star Mode: Creates star shapes by alternating between inner and outer vertices (base nodes and tip nodes).

Unlike static shapes, geometry created with this tool remains fully dynamic. Even after drawing a shape, you can completely change its look by tweaking the control handles directly on the canvas or adjusting the settings in the top tool control bar.

Key Controls and Adjustments

To master the tool, it helps to understand the specific parameters available in the upper settings bar:

• Corners: Determines the number of vertices. For a polygon, this dictates the number of sides (e.g., 3 for a triangle). For a star, it dictates the number of points.
• Spoke Ratio: Exclusive to star mode, this ratio defines the distance between the inner vertices and the outer tips. A lower ratio creates long, sharp points, while a ratio closer to 1.0 flattens the star into a polygon.
• Rounded: Controls the curvature of the corners. Increasing this value warps straight edges into smooth, organic curves, allowing you to create flower patterns or fluid abstract shapes.
• Randomized: Introduces controlled chaos by displacing the vertices unevenly. This is ideal for creating natural, non-geometric shapes like speech bubbles, explosions, or hand-drawn effects.

On-Canvas Manipulation

Every shape generated by the tool features edit handles when selected.

For regular polygons, a single handle controls the scale and rotation. For stars, two handles appear: one at the tip of a point and one in the inner valley. Dragging the tip handle rotates and scales the entire shape, while dragging the inner handle adjusts the spoke ratio. Holding the Ctrl key while dragging constrains the angles, keeping your geometry perfectly symmetrical, while holding Shift allows you to adjust the roundedness directly on the canvas.