Snap to existing geometry

Snapping is on by default and works across every tool. When the cursor gets close to an existing point or edge, drawtonomy locks onto it and lights up an indigo indicator.

A single linestring is the starting target; a second linestring snaps to it, then a vehicle and a rectangle snap to features in turn.

Across shape types

The demo runs three different tools against the same kind of target.

Linestring snaps to linestring

Starting from a single vertical linestring, the second one is drawn so its corner lands exactly on the first’s top edge. The result is a right angle that shares a point — not just visually overlapping pixels.

Vehicle snaps to a lane

Switching to the Vehicle tool and dropping a car onto a lane snaps the vehicle onto the lane’s centerline and orients it along the lane direction.

Rectangle snaps to a vehicle / canvas point

The Rectangle tool gets the same snap behaviour. The dashed indicator shows where the corner is being pulled to.

Disable snap temporarily

Hold Shift while clicking or dragging to bypass snap for that single action. Release Shift to resume snapping.

This is the right move when you want a point near, but not exactly on, an existing target.

See also

• Share points between shapes — when you want the new point to be the same as the target, not just coincident.
• Snap & point sharing model