This is with Intellicad Pro 6.6.52
Trying to set tick marks at elevations on a XY grid. Ortho and Snap are off.
Here's what I did:
1: New drawing, WCS, draw a 10' spaced grid on layer "Grid"
2: Made a block "Point" consisting of (3) 4" lines, intersecting at mid points at each of the 3 orthogonal directions. Insert point is the lines intersection.
3: Inserted point using .z, keying in the Z coordinate, and clicking on a grid intersection with intersection Osnap on. All other parameters (scale, etc.) are just clicked.
4: Turned off "GRID" layer
5: Draw between 2 or more "POINTS" (int OSNAP still on) either a SPLINE or Polyline.

Going to a 3-D view, some, not all of the spline or polyline points meet with POINT intersection. In trying to correct the error, selecting the spline or polyline, and then selecting a point and trying to drag it to POINT intersection, the intersection is not found.

I have had similar issues with 2-D drawings.

Any thoughts would be appreciated.

cdenk1,

A Spline is a single entity. It is not like to the Polyline which results from the concatenation of a series of individual VERTEX entities. In Splines you have control points, not endpoints. If you want to place anything over a control point of a Spline, I suggest you to create your Splines by creating first Polylines and using the PEDIT command to convert the resulting Polyline into a Spline. If you do this, then you will be able to use PEDIT later to decurve the Spline into a Polyline again and then you will be able to place anything in each vertex of that Polyline.

By the way, since the Splines you want to create are all horizontal, why don't you use just Polylines instead? Polylines are more flexible. Besides that, they and don't consume much memory, like does the Splines.

Thanks,
JCAMPOS

Thanks for the reply. The issue still is with the Osnaps not snapping to intersection, etc. and this is both 2-D and 3-D. Yes, I am familiar with the differences between splines, polylines and lines. I should have done polylines and then smooth them out. But the issue is points defining the entity can't be snapped to an intersection. Amount of storage is not an issue for this drawing since it is not going to be huge. These entities I am trying to draw are mostly not horizontal, but yes the have a constant Y location.

I have downloaded and installed Free Progesoft Intellicad, and there are the same issues. Others have reported the same problems with other packages, but one reported Bricad handled the issue properly.

I have a thread going on Intellicad.net forum. The drawing is available there for download. Or I can E-mail to anyone on private request. There in nothing that can't be public on the drawing.

Here's a way to demonstrate the issue:
1: Draw (3) ortho 4" long lines in the 3 planes intersecting at their mid points.
2: Make a block called point of the 3 lines.
3: Insert (3) point blocks, x = 0, y = 0, 120", 240", and vary z between 0 and 60"
4: Ortho off, snap off, Osnap = int, try to draw from block point intersections a line, polyline, or spline.

I am not able to snap to the intersection most of the time.

cdenk,

I downloaded your drawing from the intelliCAD.net forum and I'm not sure if I really understood your problem because I managed to drag the first control point of the first spline to some intersection and also the third control point of the same spline to an endpoint of a line.

Is something like this what you want? Or is the inverse, say, to drag an endpoint of a line (or whatever) over a spline's control point?

Thanks,
JCAMPOS

Here's what I did:
1: Wblocked my 3-d point, and opened that drawing. Was able to snap lines to the intersection reliably.
2: Made a Wblock of the all entities of the original drawing. Was able to snap lines and 3DPOLY to the point intersections reliably. Deleted any LTpoly, and splines, replaced them with lines (between 2 points) and 3DPOLY.

I don't know why the original drawing would not snap to the intersections reliably, including plain lines, where in the new drawing they were good. LTplines, polylines are only 2-D entities. And splines move off the points to smooth the curves. In my case, I need the curves to pass through the points.

Thanks again for the help.