.. (todo add) generalize from extrude ************ Introduction ************ Attributes ========== Weight ------ This sets the "goal weight" of selected control points, which is used when a curve has :doc:`Soft Body ` physics, forcing the curve to "stick" to their original positions, based on the weight. Radius ------ The Radius allows you to directly control the width of the extrusion along the "spinal" curve. The *Radius* of the points is set using the *Shrink/Fatten Radius* transform tool :kbd:`Alt-S`, the :menuselection:`Curve --> Transform --> Shrink/Fatten Radius`, or the :menuselection:`Properties region --> Transform --> Radius`. .. figure:: /images/modeling_curves_properties_introduction_extrude-radius.png :width: 320px One control point radius set to zero. .. tip:: Remember, these curves can be converted into meshes with :kbd:`Alt-C` in Object Mode. Tilt ---- This setting controls how the normals (visualization: arrows) twist around each control point -- so it is only relevant with 3D curves! You set it using the *Tilt* transform tool in the Tool Shelf, the :menuselection:`Properties region --> Transform --> Tilt`, :menuselection:`Curve --> Transform --> Tilt`. You can also reset it to its default value (i.e. perpendicular to the original curve plane) with :kbd:`Alt-T`, :menuselection:`Curve --> Control Points --> Clear Tilt`. With NURBS, the tilt is always smoothly interpolated. However, with Bézier, you can choose the interpolation algorithm between Linear, Ease, B-Spline, and Cardinal, in the :menuselection:`Properties Editor --> Object Data --> Active Spline --> Tilt`. .. figure:: /images/modeling_curves_properties_introduction_extrude-mean-tilt.png :width: 320px 30 degree Mean Tilt of all control points.