Creating Blend Curves

	This task explains how to create blend curves. Blending means that a connecting curve will be created between two selected curves, taking certain continuity, position and tension constraints into account.
	Open the FreeStyle_Part_43.CATPart document.
	Select two curves. Click the `FreeStyle Blend Curve` icon . The Blend Curve dialog box opens.

	Select the second curve, in case you have not previously selected it. The blend curve is automatically previewed. By default it connects the curves at their end points closest to the selected points.

	Make sure the `Continuity` icon is active in the `Dashboard` and right-click onto the identifier to edit the continuity constraint, using the contextual menu. The default continuity type is `Tangent`. You can do the same on the other end point.

	This segment represents the direction and limits of the blend curve tangent at its end points.
	Make sure the `Contact Points` icon is active in the Dashboard, to display the contact points on the blend curve end-point.
	Capabilities are available from the contextual menu when right-clicking a contact point.

	Move the pointer close to the contact point and drag the manipulator to modify the blend curve connection to the initial curves.
	Still from the Dashboard, make sure the `Tensions`icon is active, and modify the tension by sliding the displayed value along the green segment.

	You can also edit the value, or invert the tension direction, using the contextual menu on the value.


	Tensions are now homogenized between blend surfaces and blend curves, so that the borders of a blend surface have the same shape as the blend curves, providing they are built on the same supports.

	This homogenization is only possible with an approximated blend surface.
	Once you are satisfied with the new curve, click `OK` in the Blend Options dialog box. The blend curve is computed.

	The curve resulting from the blend remains selected by default. If you wish to perform analyses, make sure you select the other curves using the Ctrl-key.
	Available capabilities from the Dashboard, and/or specified through the FreeStyle Settings, are: Temporary Analysis, auto detection (Snap On Vertex option only), attenuation, continuity, contact points, tensions, and furtive display.