Selectors

Selectors are a key foundational feature of the Model Editor, enabling flexible operations on the selection. The editor supports four selector types and three selection modes.

Selector buttons on the left toolbar

Selector Types

Sphere Selector

Attaches a sphere at the cursor and selects the model content within its radius. The sphere's depth is set by the first layer of the model the view reaches.

How to use: Click "Sphere Selector" in the toolbar → hold the left button to select

Radius: Default 1.00. Adjust with Ctrl + scroll, base increment 0.01. Continuous scrolling accelerates automatically.

Sphere Selector operation

Box Selector

The only 3D selection method. Use it to precisely enclose a region in 3D space.

How to use:

1. Click "Box Selector"
2. First click sets the first corner of the base
3. Second click sets the opposite corner, forming a rectangular base
4. Third click sets the height (Z axis)

Adjust: Once created, the box can be moved, rotated, stretched, reset, and confirmed.

Box Selector operation

Rectangle Selector

Projection-selects a region based on the current camera view.

How to use: Click "Rectangle Selector" → hold the left button and drag out a box → release to complete

Also supports click-to-create: left click the start point, move, then click again for the end point.

Rectangle Selector operation

Camera projection: From the camera, a beam shines toward your boxed region like a flashlight; everything the beam touches is selected.

Mixed Lasso Selector

Draw a polygon on screen to projection-select the scene. Supports straight-line and lasso drawing.

Straight-line:

1. Left click to set the start point
2. Keep clicking to add vertices
3. Double-click to finish, or click the start point to close

Lasso:

1. Hold the left button and drag to trace a line along the cursor path
2. Release, then continue drawing

Either method: Right click to undo the last point

Mixed Lasso Selector operation

Selection Modes

Note: While adding, holding Ctrl switches to subtract.

Depth Control (2D selectors)

The Rectangle Selector and Mixed Lasso Selector support depth control, which limits how far the selection penetrates.

• Default depth: 50.00 m
• Adjust by: Ctrl + scroll / panel slider / value entry
• Click "Global" to remove the depth limit (select all depths)
• Depth patch: once a depth is set, the cursor shows a depth-range indicator in the scene

Hardware Limit Prompt

When the model data volume or the selection exceeds what the current hardware can handle, the system prompts you to save the current edits, avoiding data loss caused by exceeding the hardware load.

During editing, if the selection exceeds the current hardware capacity, it's best to save the current edits first, then continue processing region by region.

Tips Summary

View control

• View lock: the camera locks automatically when a selector is active
• Temporary unlock:
  • Alt + left drag: rotate the camera
  • Right drag: pan the view
  • Scroll: zoom the view
• Cancel selection: press Esc

Selector comparison

Shortcut reference