<< Click to Display Table of Contents >> Navigation: MechDesigner Reference & User Interface > DialogBoxes > Dialog: BlendCurve 
See also Add BlendCurve
You can edit the XY Position of the startPoint and endPoint in the PartEditor. You can also edit these geometricproperties AT the startPoint and AT the endPoint of a BlendCurve : •Angle •Curvature •Curvature Rate The geometricproperties are: •equal to those of the sketchelement(s) with which you merge the BlendCurve's startPoint and/or endPoint. OR •zero(0) if you do not merge the BlendCurve with sketchelements at its startPoint and endPoint. You can edit the geometricproperties •Exactly : with the BlendCurve dialogbox •Approximately : with the BlendCurve draghandles. 
In the PartEditor or the MechanismEditor:

The BlendCurve dialogbox is now open.
There are two separators: StartPoint... EndPoint... The parameters are the same for the two separators 

Start Point ... / End Point ... Angle (Units: º):
Curvature k (Units:1 ∕ meter):
CurvatureRate dk ∕ ds (Units: 1 ∕ m^2):
Velocity Scaling (no units)

Drag handles in the GraphicArea 
To show the DragHandles
You can now see the DragHandles at the startPoint and the endPoint There are two(2) DragHandle types:

Arrowhead DragHandle 
Arrowhead DragHandles control the Angle and the VelocityScaling Factor


Circle DragHandle 
Circle DragHandle control the Curvature

Note on Curvature and CurvatureRate
Curvature All positions along a curve have a radius, which we call the curve's RadiusofCurvature. Curvature = 1 / RadiusofCurvature In general, the RadiusofCurvature continually changes along the curve. As RadiusofCurvature decreases, the Curvature increases. Curvature of a Line = 0 ; RadiusofCurvature of a Line = ∞ Curvature of a Circle = 1 ∕ Circle Radius. E.g. : A circle has a radius of 20mm, its curvature = 1/0.02m = 50/m. CurvatureRate This is the rateofchange of curvature (how rapidly curvature changes) with respect to the distance along the BlendCurve. 