Spline Trim Extend

* it's recommended to use the new script Shape Vertex Aligner
it supports all vertices not First-Last only.

3DSMax Script for Moving Selected Shapes Vertices , Similar to Trim-Extend Behavior .

UPDATE 1 :

• Keep Shape Pivot in its Position .

• Make each Vertex Move on its Segment Direction .

UPDATE 2 :

• Tangents are not Moving with the Vertices , Fixed .

NOTE : the Script still not Perfect on curved splines , (the result not like real Trim or Extend) .

UPDATE 3 :

• Add another script (Spline Extend-Trim - No Grid.mse) , same as previous but without creating Helper Grid .