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## Constraints within SISCAD-P

The following constraints are available in SISCAD-P:

> - COLLINEARITY
> - CONCENTRICITY
> - DIAMETER
> - DISTANCE
> - FIXING
> - HORIZONTALITY
> - PARALLELISM
> - PERPENDICULAR
> - POSOFCENTER
> - POSOFPOINT
> - RADIUS
> - SYMMETRY
> - TANGENTIALITY
> - VERTICALITY

The individual constraints are described as follows.

- COLLINEARITY
  The constraint to be collinear is assigned to two circles or circular arcs. The radii of these circles or circular arcs are not determined with this constraint.

- CONCENTRICITY
  The constraint to be concentric is assigned to two circles or circular arcs. The radii of these circles or circular arcs are not determined with this constraint.

- DIAMETER
  The constraint to have a defined diameter is assigned to a circle or circular arc. The value of the diameter is determined with an existent dimensional object.

- DISTANCE
  The constraint to have a defined distance to each other is assigned to two geometrical objects. The value of the distance is determined with an existent dimensional object. Any other position of the objects to each other is not determined with this constraint.

- FIXING
  A geometrical object is fixed on its current position. Points will be fixed on the corresponding co-ordinate position, lines on the corresponding carrier line and circles on the corresponding carrier circle. The detailed position of circular arcs as well as finite and single infinite lines is not determined with this constraint.

- HORIZONTALITY
  The constraint to be horizontal is assigned to a line. The detailed position of this line is not determined with this constraint.

- PARALLELISM
  The constraint to be parallel is assigned to two lines. Which other position or distance they have to each other is not determined with this constraint.

- PERPENDICULAR
  The constraint to be perpendicular to each other is assigned to two circles or to one line and one circle. Any other position of the objects to each other is not determined with this constraint.

- POSOFCENTER
  The constraint to lie on the center of a finite line is assigned to a point.

- POSOFPOINT
  The constraint to lie on another geometrical object is assigned to a point. Suitable geometrical objects are points or lines or circles. The detailed position of the point on the other object is not determined with this constraint.

- RADIUS
  The constraint to have a defined radius is assigned to a circle or circular arc. The value of the radius is determined with an existent dimensional object.

- SYMMETRY
  The constraint to be symmetrical with respect to a axis of symmetry is assigned to two objects of the same kind.

- TANGENTIALITY
  The constraint to be tangential to each other is assigned to two circles or to one circle and a line. Which other position they have to each other is not determined with this constraint.

- VERTICALITY
  The constraint to be vertical is assigned to a line. Any other position of the line is not determined with this constraint.

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