Alibre Design

Chapter 5 - 3D Sketching5.7.2 Explicit ConstraintsExplicit constraints are applied in a fashion analogous to their 2D equivalents through the use of atoolbar button or menu selection. The Constraints fly-out toolbar is available from the Sketchingtoolbar.face.Coincident - A node can be constrained so that it lies on a figure, model edge, or planarFixed - Figures may be constrained to a fixed position in the sketch. After the constraintis applied, the node or figure may not be moved without first deleting the constraint.Fixed Direction - The direction of a 3D line can be constrained so that it is held constant.Parallel - Lines can be constrained to be parallel to each other. In addition, a line can beconstrained to be parallel to a linear edge, a reference plane, or a planar face. For planes and faces,the constraint indicates that the line is perpendicular to the normal of the plane or face.Perpendicular - Lines can be constrained to be perpendicular to other lines, referenceplanes, reference axes or planar faces. Splines can be constrained to reference planes and planarfaces.Note: With the Perpendicular constraint, the behavior of lines and splines differs: Lines will beparallel to the normal of a plane or face. Splines will be set tangent at the start or end of the splineparallel to the normal of a plane or face.Tangent - Figures can be constrained to be tangent to a curve. Tangent constraints canbe applied automatically during sketching or placed manually after a figure has been sketched.Tangent Continuous - An open 3D figure can be constrained to be continuous at itsendpoint to another open 3D figure or an open edge.126