Allows you to establish tangent continuity between two curves.
How to use
1. Click the Curve tangency align icon or choose the Tools > Curves > Curve tangency align command.
2. The program console prompts Pick master curve at tangency point.
3. Pick the first curve you want to align at tangency point, whose position can be defined by sliding along the curve without releasing the mouse button. The curve turns green.
4. The program console prompts Pick slave curve near endpoint.
5. Pick the second curve you want to align near the desired endpoint.
6. A new curve establishing tangent continuity with the master curve is created in place of the original slave curve.
The new curve is automatically updated at any modification of the master curve. If you set the angle parameter at 90 degrees you can make the new curve perpendicular to the master curve.
The original slave curve is hidden but not deleted. Thus, you can select it from the browser and modify its shape working in Edit mode. The newly created curve will be updated at any change.
By default, the new curve is attached to the master curve, but you can also disable this option, in which case the new curve will have tangency alignment to the master curve but will not be attached.
Options
Master curve
To change the master curve.
Views / Modeling Tool panel. Switch the Replace check button on and pick another curve in the scene.
Point on master
To adjust the tangency point along the master curve.
Modeling Tool panel. Move the slider or type the position value (in a 0 to 1 range where 0 and 1 represent the endpoints) in the data field and press Enter to confirm. Changes are interactively displayed in the views.
Slave curve
To change the slave curve.
Views / Modeling Tool panel. Switch the Replace check button on and pick another curve in the scene.
Endpoint on slave
To change the desired endpoint of the slave curve.
Modeling Tool panel. Switch one of the two radio buttons on to choose the Start or the End of the curve.
Angle
To set the angle of the new curve with respect to the master one.
Modeling Tool panel. Move the slider or type the degree value in the data field and press Enter to confirm. Set 0 for tangency, 90 for perpendicularity. You can slide the new curve along the master one by simply dragging Point on master curve.
Attach
To join master and slave curves by attaching the tangency point on master curve and the endpoint on slave curve.
Modeling Tool panel. Switch off the check button to disable this option, which is enabled by default.
Tangency plane
To define your preferred tangency plane.
Modeling Tool panel. Switch the chosen radio button on to specify one of the following options: Auto, XY, XZ, YZ, User.
Tangency plane normal
If you have chosen the User option in the above Tangency plane section, you can define any custom tangency plane by typing the XYZ coordinates that determine the plane normal orientation.
Modeling Tool panel. Type the values in the XYZ data fields and confirm them by pressing Enter.