Compute the 2d convex hull of a point cloud in the plane.
8 Menu: ComputationalCAD 2d convex hull
7 Command entry: CC:HULL:2D
Select the points for which to compute the 2d convex hull.
Specify projection direction
Select the projection direction.
<X>: The hull is computed in the global YZ-plane
<Y>: The hull is computed in the global XZ-plane.
<Z>: The hull is computed in the global XY-plane (default).
<Ucs>: The hull is computed in the UCS XY-plane.
<2Points>: The hull is computed in a user defined plane perpendicular to the projection direction. The following dialog occurs:
Specify first point
Select the first point of the normal vector defining the plane.
Specify second point
Select the second point of the normal vector defining the plane.
The 2d convex hull is the planar convex polygon that encloses all points with minimum perimeter length. If the points are 3d points, the 2d convex hull is computed for the projection of these points onto the specified projection plane.
Figure 40: A 2d convex hull of 24 points
Command line prompt:
Number of vertices on hull : 10
Hull perimeter length : 2156.6425
Enclosed area in hull plane: 337976.7258