Changes the way the picked blend curve constraint controls the direction of the curve as it passes through.
The following tools are available on the Constraint Interpolation Direction pull-out: Blend constraint interpolate location, Blend constraint interpolation direction, and Blend constraint interpolate geometry.
Constrains the curve to pass through the location of this blend point.
Constrains the curve to pass through this blend point in a certain direction relative to world space. Set the direction with BlendCrv Tools > Blend Curve Edit .
Constrains the curve to pass through this blend point in a certain direction relative to the object to which it is attached. Set the direction with BlendCrv Tools > Blend Curve Edit .