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- CHG END (change endpoint) allows you to modify the end
- condition of an existing spline for any of the following
- purposes:
-
- - to modify the magnitude of an existing end tangent
- vector.
- - to alter the direction of an existing end tangent vector.
- - to assign a new end tangent vector.
- - to assign a zero curvature to an end.
-
- Select a spline near the desired end to be modified.
-
- A new menu is displayed, offering various end conditions
- for the selected 2-D or 3-D spline. End conditions are as
- follows:
-
- NATURAL - to assign a curvature of zero to the appropriate
- end of the spline.
-
- 2 PTS - to specify a tangent vector at a spline end
- point by indicating two points.
-
- ENDENT - to specify a tangent vector by using the
- tangency at the end of an existing entity.
-
- TANGENT - to enter the x, y, (and z if 3-D) vector
- components and magnitude of a desired tangent
- vector.
-
- ANGLE - (for 2-D splines only) to determine the
- direction of a tangent vector by setting the
- angle between the tangent vector and the
- positive x axis.
-
- After an end condition is selected, the spline is redrawn
- using the new end condition data. The 2-D or 3-D
- specifications are still assigned.
-