AEC Modify - Subtract

I've been using the AEC Modify - Extend and Trim commands for extending and trimming to profile objects and its been working well. I thought I would take a look the subtract tool. This one would be a useful in creating details.

It takes linework and trims out one linework from another. The two benefits of this command is that you can trim blocks with it and trim with AEC objects, such as subassemblies. To use just right click in model or paper space and choose AEC Modify Tools> Subtract select the linework you are going to subtract from (or edit) then press enter and then choose the objects that are going to subtract from the first objects selected.

Look on page 1395 of the User's Guide for a picture of how the command works.

The User's Guide is located at C:\Program Files\Autodesk Civil 3D 2008\Help\civil_ug.pdf

Posting Elsewhere

I have a post on http://www.civil3d.com/ on VBA pipe code.

Below is a link to sample code which is similar to what I posted at Civil3d.com. The code at the link below gives the point at an offset of 10 feet from the assigned pipe's alignment.

http://fredbobchris.googlepages.com/intermittentblockoftheday

The code is in no way complete, but will provide a good starting point to create your own code for creating points from your pipes.

Pipes and Slopes

Here is how the various flow direction methods affect if the slope is positive or negative. Ignore the incorrect/correct invert notes, its for what's going in my AU presentation this year. The last picture indicates how the pipe was laid out and how to change the flow direction method. It can also be changed in Toolspace.

Command Reminders

I'm throwing away my post it attached to my computer with reminder commands and putting it here for later use.

LAYOUTREGENCTL
Set to 0 for regen each time
Set to 1 for cached view

Alt-0160 For a null character in a field (Gets rid of an error in a field that hasn't been set, ie the second line of a sheet title using the custom properties in Sheet Set Manager.)

INPUTHISTORYMODE
Changes from giving coordinates to original values typed into the command line. Don't know if it affects dynamic input. Use one of the lower values, set to 2.

filedia=1
cmddia=1
Use when the program changes these values to 0.

\X
To have a second line text in dimensions.

PSLTSCALE=1
LTSCALE=1
Just the settings the office prefers.

SCALELISTEDIT

MIRRTEXT
Changes the mirror to actually mirror text, or mirror text so the text is legible.

MAPWSPACE
Turns on and off the Map task pane.

convertpstyles
Converts the drawing from a ctb plot style to an stb plot style or the other way around.

Change all of the Blocks in a drawing to unitless:
(vl-load-com)(vlax-for x(vla-get-Blocks(vla-get-activedocument (vlax-get-acad-object)))(vlax-put-property x "Units" 0))
Copy and paste it into the command line and it will change all of the blocks to unitless. If the 0 is changed to 1 then the blocks are changed to inches, 2 is feet, 3 is miles, 4 is mm, 5 is cm, 6 is meters, 7 is km, 8 is microinches, 9 is mils, 10 is yards, 11 is Angstroms, 12 is nanometers, 13 is microns, 14 is decimeters, 15 is Dekameters, 16 is Hectometers, 17 is Gigameters, 18 is Astronomical Units, 19 is Light Years, 20 is Parsecs.

ATTSYNC - Update block attributes.

Reset User Profile and Settings: http://usa.autodesk.com/adsk/servlet/ps/dl/item?siteID=123112&id=14929107&linkID=9240697&CMP=OTC-RSSSUP01

Default Template Location: C:\Documents and Settings\Christopher.Fugitt\Local Settings\Application Data\Autodesk\C3D 2010\enu\Template

PLINETYPE Allows you to draw Polyline2D, change the values.

AEC Modify - Trim

You can use the AEC Modify Trim to edges of Civil 3D objects (or any other objects). Just choose it from the right click menu, choose the object you want to trim, then hit enter to be able to select an edge in the drawing, then select the edge in the drawing (a red line will appear indicating the edge that will be selected), then choose the side you want trimmed.

This is helpful for trimming against Civil 3D objects that you can't trim to using the normal trim command. For instance if you have a line in profile view and you want it trimmed to a profile you can do it with this command. The only thing lacking in my opinion is the ability to select a profile vertical curve as an edge.