What is the Inkscape Intersection Path Operation?
The Intersection path operation in Inkscape is a powerful vector editing tool used to retain only the overlapping regions of two or more selected paths. When you apply this command, Inkscape deletes all non-overlapping areas of the selected objects and merges the intersecting sections into a single, new shape. The resulting path adopts the style, color, and stroke properties of the topmost object in the original selection layer stack.
How the Intersection Tool Works
To use the Intersection tool, you must select at least two overlapping paths and navigate to Path > Intersection or use the keyboard shortcut Ctrl + *. Inkscape evaluates the geometry of the selected items and executes the operation based on specific design rules:
- The Overlap Area: Only the exact geometric space where all selected objects intersect will remain on the canvas. Everything outside this shared boundary is permanently removed.
- Style Inheritance: If the overlapping objects have different colors, opacity settings, or stroke widths, the final shape will inherit the visual properties of the object that was positioned highest in the z-order (the top layer).
- Requirement for Paths: This operation requires path objects. If you are trying to intersect regular shapes (like a rectangle or a circle) or text, you must first convert them using Path > Object to Path.
Common Use Cases in Vector Design
The Intersection operation is a staple workflow for vector artists and graphic designers. It simplifies the creation of complex geometry that would be difficult to draw by hand.
Creating Shading and Highlights
Designers frequently use Intersection to create precise shadows and highlights on an object. By duplicating a base shape, overlapping it with a secondary shape, and applying the Intersection command, you get a perfect crescent or highlight that fits exactly within the boundaries of the original graphic.
Pattern Masking and Cropping
When you need to crop a complex pattern or a grid of lines into a specific shape—such as fitting a geometric pattern inside a star—the Intersection tool acts as a permanent crop. It trims away all the excess pattern lines outside the star’s boundaries.
Designing Complex Icons
Icon design relies heavily on geometric precision. Intersection allows you to combine simple shapes like circles and polygons to isolate unique, symmetrical core shapes, such as leaf structures, lens glares, or crescent moons.