This example illustrates the use of bounded dimensions in a 3D sketch. A bounded dimension prevents the length of a segment of the sketch from going outside the bounded range, whilst solving within the bounds, helping the user to preserve design intent. At the beginning of the animation, several bounded dimensions are displayed. The current value is displayed, followed by its lower and/or upper bounds.

The dimension display is then disabled for clarity. A point is selected for dragging. Note a bounded distance dimension has been added between the point and the vertical wall (plane) and the point is constrained to have only one degree of freedom. Dragging the point therefore results in its movement in a single direction to and from the vertical wall, within the range of its upper and lower distance bounds.

A different point is then dragged. It is constrained to a second point by a distance dimension that has only an upper bound. The distance can therefore reach zero. Note how this enables the point to be dragged to the other side of the second point.

Finally a third point is dragged. Note as one edge segment solves to its boundary, motion is propagated to the next edge segment, and so on.