Intersecting groups in SketchUp allows you to find the common volume or area where two 3D objects overlap. The exact method can depend on whether you are using SketchUp Pro and the specific tool you employ, as described in the reference.
Using the Solid Tools Intersect Method (Requires SketchUp Pro)
The reference describes a method that aligns closely with SketchUp Pro's Solid Tools. This suite of tools is specifically designed for performing boolean operations on solid groups or components.
Here's how to use the Solid Tools Intersect, based on the reference:
- Access Solid Tools: In SketchUp Pro, you can find the Solid Tools toolbar.
- Select the Intersect tool: Click on the "Intersect" tool icon within the Solid Tools.
- Click your first solid: As the reference states, click on the first group (or component) you want to intersect.
- Click the second solid: Click on the second group (or component).
As described in the reference, "Clicking another solid removes all geometry from those solids except for the intersecting geometry." The resulting object will be a new group or component containing only the volume where the original two solids overlapped.
Note: The reference mentions "Click-Move-Click Mode or Just Draw Mode." While typical drawing tools use these modes, the Solid Tools work by selecting the tool and then clicking the objects one by one. This specific phrase might be a general description of interaction modes rather than a direct instruction for the Intersect tool itself in this context.
Using the Intersect Faces Method (Standard)
A more widely available method, present in both SketchUp Free and Pro versions, is the Intersect Faces command. This command creates new edges and faces wherever the geometry of selected objects overlaps.
Here’s how to use the Intersect Faces method:
- Select the Groups: Use the Select tool to select both of the groups you want to intersect. You can hold down the Shift key to select multiple objects.
- Right-Click: Right-click on one of the selected groups.
- Choose Intersect Faces: From the context menu that appears, hover over "Intersect Faces."
- Select an Option: Choose either:
- With Selection: Creates intersection geometry only between the objects you currently have selected.
- With Model: Creates intersection geometry between the selected objects and all other visible geometry in the model. For intersecting just two groups, "With Selection" is usually appropriate.
Unlike the Solid Tools method which results in a single solid object of the intersection, the Intersect Faces command adds new edges and faces within the original groups' geometry where they overlap. You would then typically need to manually clean up (erase) the unwanted geometry to isolate the intersecting part.
Comparing the Methods
| Feature | Solid Tools Intersect (Pro Only) | Intersect Faces (Standard) |
|---|---|---|
| Requirement | SketchUp Pro; Objects must be "Solid Groups" | Available in SketchUp Free/Pro; Works on any geometry |
| Outcome | A new solid group representing only the intersection | Adds new edges/faces where geometry overlaps |
| Workflow | Select tool, then click objects | Select objects, then right-click command |
| Result | Clean, ready-to-use intersecting solid | Requires manual cleanup to isolate intersection |
Choosing the right method depends on your SketchUp version and desired outcome. For a clean, solid intersection, the Solid Tools method described in the reference is efficient if you have SketchUp Pro and your objects are solid. Otherwise, the Intersect Faces method is a versatile standard approach.
