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Points on Objects

These are points, which are bound to a line, a circle, automatic tracks, polygons, function graphs or parametric curves (bound points). They will move in a continuous way, if the containing object is moved. A point can be released, and bound to a new object at any time using its properties dialog.

Points can be bound on the perimeter of objects, or on the inside of objects, if the object is a circle, an angle or a polygon. To create a point inside an object, simply create an object on its boundary, and edit the properties of the object, switching the "inside" flag on. Alternatively, use the "bind to" button in the dialog of any free point and press the ctrl-key when selecting the object.

Bounded points are either created with the point tool by clicking on a line or a similar object, or by a special tool. Moreover, any point can be bound to an object later on using its properties dialog. Exit the dialog with the button to bind the point, and then select the object.

Points can be bound in two ways. Either the point is projected every time the object moves, or the point is kept in its relative position on the object. The relative fix can be removed or set in the object editor. The relative fix is the default.

Bound points are not free. If however, a segment lies with both endpoints on a line, and one of them is a bound point (to the line), the segment can be fixed in its length. Normally, this is only possible, if the segment hat at least one free endpoint.

Related topics: Points, Lines and Rays, The Mouse, Object Properties

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