Download Grid Lisp For Civil 3d

I am afraid that I cannot help you with your request. My lisp was written 20 years ago, and my brain has shrunk since then. I also do not use Paper Space, but I expect there is someone out there who could help. Or you could even write your own lisp to do exactly as you want it to

The thing is that in my last job I was spoiled rotten. One of the lads there was a lisp GENIUS! I think he must have dreamed in lisp! And he'd written a spank-load of lisp routines that I'd just taken for granted. One of them was his grid command that could draw a grid pretty much however you wanted it. Now in my new job I've got to start from scratch and I'm starting to understand just how much he did!

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The program would allow the user to place the cursor anywhere in the model view, upon a data point, it would lock onto a 250' grid point, read it, show where the grid tick is, then allow the user to accept and place the grid tick with the X,Y coordinates or reject it and move to another location where the process begins again.

You might want to turn the PDMODE to some "point" which looks more like your "grid-tick". Or you could use the Insert command instead to place a block. To have the same command repeat, start off with the multiple command. Then: if you're using Point you would simply move the mouse to each grid where you want it, then click only there.

If called with 'DGridD' (Draw Grid Dynamic) at the AutoCAD command-line, the program will display a real-time preview of the grid constructed between the two corner points; however, Object Snap is imitated during the preview, and most other AutoCAD functionality (such as Tracking / Orthomode etc.) is unavailable in this mode.

So, this past week I was tasked with creating and labeling grid lines in model space in AutoCAD C3D 2021. If you have a similar task and are wondering how to proceed or want to simply learn how to do this, please read on!

Now the problem might be that the OD value is to way to large to use as a scale factor. Take my sample for instance. I want to use the PSI values to use, but those vales are up in the thousands, which makes the blocks WAY TOO BIG for my map. This is where the old legacy map shines verses the FDO ways and expression used there. With this method I can use a lisp expression to change the scale values right here in the property palette. The lisp expression I used is an arithmetic function that divides the OD value by 100 or by any number you desire.

I could easily tell you how to model 3d solids, its the same in bcad as acad. You essentially draw closed plines for each level, then extrude.

You set the initial elevation of the plines to set elevs, or lift after the fact.

I'm a cad/civil guy though, not architectural BIM. Can you explain the difference between a "dumb" 3d solid, and what revit does?

Of course, I mean is the revit thing parametric? BIM is parametric while 3d models don't know how they were made or what they are.

thx

To answer your question regarding a "dumb" 3D solid compared to a "BIM Object": I can model a 3D slab in either Revit or AutoCAD (if I really wanted). The slab in Revit obviously has extended data attached to it. Both programs will spit out the volume. Revit also knows what "level" the slab is based on; I have more access to the material of the slab (a slab on grade will have a different concrete mix compared to my suspended slab - but you could theoretically do this in AutoCAD too, but you wouldn't be able to do an automatic quantity take-off); I can change the geometric and physical properties of the slab much easier than in AutoCAD (such as the thickness let's say, or add a topping within seconds); I can "tag" the slab automatically (this sometimes actually works like we want); and finally, in a perfect world, I can model a slab waaaaaaay faster in Revit compared with AutoCAD. Revit isn't without it's flaws however, sometimes stuff just doesn't work like it's supposed to. One last thing I will add is that Revit allows me to add custom parameters. For example, I can add a custom parameter for the type of reinforcing in my slab on grade (there usually isn't any extra top steel, just a grid chaired at mid height). I can get my rebar quantity (other than the diagonal bars at openings/columns/corners/etc... but I can just account for this by adding a factor to the main steel) without having to actually model any rebar by using a custom parameter.

Got it, so its not a flat slab. You would now be in the world of modeling a civil engineering triangulated surface.

You would then turn the triangles to 3d faces, extrude to get solids, and union to get one big solid.

Civil surfaces are modeled with "breaklines". That is really any 3d line and points too. Those things act like ribs for an umbrella, and the tris stretch to connect them by connecting the closest points.

Lofting does a similar thing, but is limited by sections in order - no good.

For a slab, you would make one 3d pline around the edge, with correct elevations at each point. Then draw any creases with elevations.

Then turn into TIN surface. You likley need a 2d edge also to trim out the tris that "reach" accross corner to corner, if you don't have a convex outline.

Steps are modeled with slightly offset 3d plines. You cannot have true vertical faces in TIN surfaces, that would be undefined.

You could model in pieces and union together later to get perfect vert steps though.

So your workflow is:

1) Make the 3d plines

2) Make the TIN surface

3) explode to 3d faces

4) extrude thickness

5) union

6) to edit, erase solids, mod 3d plines, and start back at 2

Hey there,

A 3d breakline is a 3d line whose segments go up and down as needed. Its not a lightweight polyline, that is at one elevation.

Those cannot generally be made efficiently using basic bcad commands. In your case though, I bet you could as you don't have curves involved.

The things that make TINs actually derive points from the breaklines, but then restrict triangles from crossing them too, which is what civils want.

The world of TIN creation and editing, once you have the 3d breaklines, is done really well by most civil software. Bricsys is kind of new to it and I don't know all its commands yet. Most civil software does not make the 3d breakline creation easy. Its either complicated when using road alignment data, or cumbersome when doing little stuff because it forces an elevation at horizontal vertices. We did our own tool on that.

This is 89th of Q&A and in this video, I answer one question which I received on youtube comments and the question is how to draw topo survey data in Grid 10 in 10 meters squire. For the answer to this question, I used AutoCAD Civil 3d and I use excel and AutoCAD file which I received by email 1st I Create a surface from topo points then make grid points using Civil 3d For complete training of civil 3d click on the link given bellow =PL6lSnhW4YFv5NnfhxJrTzIQ3R3rY6kiw4 For watching all Q&A videos click on the link given bellow =PL6lSnhW4YFv5HFo4io6JP3ZRXOs_yRulN For visiting My Dailymotion channel click on the link given bellow For visit, my Website click on the link given bellow For visit, my FaceBook Page click on the link given bellow -105377167600580 For visit, my Blog click on the link given bellow

@rover83 That civil3d scares the heck out of me. I have done some adjustments lately and some quick auto linework in TBC. Export all the points and the linework saved as a dwg. Cad people gets data and start griping my linework is off my points are off every thing moved or shifted. Well I check everything on my end. All is good. International feet on his bringing my linework in but points are usft. To many units places for me to figure out as a rookie civil3d guy. Surface import has its own units points etc etc. why who thunk that up.

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