AutoCAD 2027

https://help.autodesk.com/view/ACD/2027/ENU/
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AutoCAD 2027 is a professional computer-aided design (CAD) software application used for 2D and 3D...
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### Example: AutoCAD Startup with Template, View, and Script

Source: https://help.autodesk.com/view/ACD/2027/ENU?guid=GUID-7FDC500C-E04A-432D-A73D-EB1B6C6728B1

This example demonstrates how to start AutoCAD with a specific drawing template, restore a named view, and execute a script file using command line switches.

```bash
"d:\AutoCAD 2026\acad.exe” /t "d:\AutoCAD 2026\templatearch1.dwt" /v "plan1" /b "startup"
```

--------------------------------

### Get Ellipse Start Point

Source: https://help.autodesk.com/view/ACD/2027/ENU?guid=GUID-AA1C450F-AA6E-4B05-AFB3-989AD91ADBFC

Retrieves the start point of an ellipse object. For ellipses, the start and end points are identical.

```autolisp
(vlax-curve-getStartPoint ellipseObj)
(2.0 2.0 0.0)
```

--------------------------------

### Example Script for Startup Configuration

Source: https://help.autodesk.com/view/ACD/2027/ENU?guid=GUID-5510017F-4656-478F-BD4C-AB6B1998BF55

This script configures startup settings like grid, linetype scale, and current layer. It uses command-line versions of commands.

```script
grid on 
ltscale 3.0 
layer set 0 color red 0
```

--------------------------------

### Get Spline Start Point

Source: https://help.autodesk.com/view/ACD/2027/ENU?guid=GUID-AA1C450F-AA6E-4B05-AFB3-989AD91ADBFC

Retrieves the start point of a spline object. This is useful for curve analysis and manipulation.

```autolisp
(vlax-curve-getStartPoint splineObj)
(1.73962 2.12561 0.0)
```

--------------------------------

### Example of AutoCAD Startup Command Line

Source: https://help.autodesk.com/view/ACD/2027/ENU?guid=GUID-CE4A928E-FDB1-470A-8176-32ABD1E3C6A1

This example demonstrates how to append command line switches to the AutoCAD executable path in a shortcut's target field. It includes specifying a drawing name, a template file, a view, and a script to run.

```bash
"d:\AutoCAD 2026\acad.exe" /t "d:\AutoCAD 2026\templatearch1.dwt" /v "plan1" /b "startup"
```

--------------------------------

### Get Start Parameter of a Curve

Source: https://help.autodesk.com/view/ACD/2027/ENU?guid=GUID-37282EB1-D47C-4039-B1AF-744EB5B53F25

Obtain the starting parameter of a curve object. This is a prerequisite for some curve measurement operations.

```autolisp
(setq startSpline (vlax-curve-getStartParam splineObj))
```

--------------------------------

### Start Notepad and Open a File (Windows)

Source: https://help.autodesk.com/view/ACD/2027/ENU?guid=GUID-30EC493A-674B-4AAE-8C88-358E38CDAB21

Starts the Notepad application and opens the 'acad.lsp' file on Windows. Ensure Notepad is in your system's PATH or provide the full path.

```autolisp
(startapp "notepad" "acad.lsp")
33
```

--------------------------------

### Get Reactor Data

Source: https://help.autodesk.com/view/ACD/2027/ENU?guid=GUID-55830A47-2AEF-4565-BB5B-F5A7629CC567

Retrieves the application-specific data associated with a VLR object. This example shows how to get a string from a circleReactor.

```autolisp
(vlr-data circleReactor)
```

```autolisp
"Circle Reactor"
```

--------------------------------

### Example of dumpallproperties with context 1

Source: https://help.autodesk.com/view/ACD/2027/ENU?guid=GUID-A65FBCCF-CC5D-47E8-9117-D577D9CB9D8A&p=OARX

This example shows the StartPoint property promoted to individual X, Y, and Z values, with context set to 1.

```autolisp
StartPoint/X (type: double)  (LocalName: Start X) = 6.250000
StartPoint/Y (type: double)  (LocalName: Start Y) = 8.750000
StartPoint/Z (type: double)  (LocalName: Start Z) = 0.000000
```

--------------------------------

### Get Size of a Directory on Windows

Source: https://help.autodesk.com/view/ACD/2027/ENU?guid=GUID-646032BF-CAC1-4166-9EBA-2C954DFF3005

Example of using vl-file-size to get the size of a directory on Windows. The function returns 0 for directories.

```autolisp
(vl-file-size "c:/")
0
```

--------------------------------

### Get Size of a File on Windows

Source: https://help.autodesk.com/view/ACD/2027/ENU?guid=GUID-646032BF-CAC1-4166-9EBA-2C954DFF3005

Example of using vl-file-size to get the size of a file on Windows. The function returns the file size in bytes.

```autolisp
(vl-file-size "c:/autoexec.bat")
1417
```

--------------------------------

### Create Slide Library Command Example

Source: https://help.autodesk.com/view/ACD/2027/ENU?guid=GUID-EE67A8FF-3520-4E3A-9E14-C141DBA6E2CD

Example of using the SLIDELIB utility to create a slide library from a text file list. The utility appends the .slb extension automatically.

```bash
slidelib house < areas.txt
```

--------------------------------

### Setting Keyword Options with initget and getreal

Source: https://help.autodesk.com/view/ACD/2027/ENU?guid=GUID-44553A7D-EFFF-4C26-8CF9-DF163ECACCB9

This example shows how to define keywords 'Pi' and 'Two-pi' using initget for the getreal function. It also inhibits null input, allowing the program to return specific values or the entered number based on keyword recognition.

```autolisp
(defun C:GETNUM (/ num)
  (initget 1 "Pi Two-pi")
  (setq num (getreal "Pi/Two-pi/<number>: "))
  (cond
    ((eq num "Pi") pi)
    ((eq num "Two-pi") (* 2.0 pi))
    (T num)
  )
)
```

--------------------------------

### Get Z Component from Spherical Coordinates

Source: https://help.autodesk.com/view/ACD/2027/ENU?guid=GUID-163FB50A-B9B2-4292-A1BD-0C872CA441D5

Provides an example of how to get the Z component of a point expressed in spherical coordinates using the zof function.

```autolisp
(zof [2 <45<45])
```

--------------------------------

### Get Endpoint of an Ellipse

Source: https://help.autodesk.com/view/ACD/2027/ENU?guid=GUID-11309952-C617-4467-85E8-7EBE949F2730

This example demonstrates how to get the endpoint of an ellipse object using `vlax-curve-getEndPoint`. Ensure the `ellipseObj` is a valid VLA-object representing an ellipse.

```autolisp
(vlax-curve-getEndPoint ellipseObj)
```

```autolisp
(2.0 2.0 0.0)
```

--------------------------------

### Example Console Input

Source: https://help.autodesk.com/view/ACD/2027/ENU?guid=GUID-C79EC4E0-8E0E-4323-92D5-7AD026489ECB

This is the initial set of commands entered into the Visual LISP Console window before demonstrating history retrieval.

```visual lisp
(setq origin (getpoint "\nOrigin of inyn sign: "))
(setq radius (getdist "\nRadius of inyn sign: " origin))
(setq half-r (/ radius 2))
(setq origin-x (car origin))
(command "._CIRCLE" origin radius)
```

--------------------------------

### Example of dumpallproperties with context 0

Source: https://help.autodesk.com/view/ACD/2027/ENU?guid=GUID-A65FBCCF-CC5D-47E8-9117-D577D9CB9D8A&p=OARX

This example shows the StartPoint property not promoted, with context set to 0.

```autolisp
StartPoint (type: AcGePoint3d)  (LocalName: StartPoint) = 6.250000   8.750000  0.000000
```

--------------------------------

### Get the number of dimensions of a safearray

Source: https://help.autodesk.com/view/ACD/2027/ENU?guid=GUID-FA24BF36-D548-44E2-B945-76445CE7BEB7

Use vlax-safearray-get-dim to determine the number of dimensions in a previously created safearray. This example shows how to get the dimension count for 'sa-int'.

```autolisp
(vlax-safearray-get-dim sa-int)
```

--------------------------------

### Get Start Parameter of a Curve

Source: https://help.autodesk.com/view/ACD/2027/ENU?guid=GUID-854C3C4D-1305-4920-9E42-D9ACB9E4363C

Use this function to determine the starting parameter of a curve object. Ensure the input is a valid VLA-object representing a curve. Supported on Windows only.

```autolisp
(vlax-curve-getstartparam ellipseObj)
```

--------------------------------

### Create and Populate a List

Source: https://help.autodesk.com/view/ACD/2027/ENU?guid=GUID-E2C60C39-B46E-4779-82CE-CFFCCCE93AF0

This snippet demonstrates how to create a list named 'stuff' containing string elements.

```autolisp
(setq stuff (list "a" "b" "c" "d" "e"))
```

--------------------------------

### Start TextEdit and Open a File (Mac OS)

Source: https://help.autodesk.com/view/ACD/2027/ENU?guid=GUID-30EC493A-674B-4AAE-8C88-358E38CDAB21

Starts the TextEdit application and opens the 'acad.lsp' file on Mac OS. Ensure TextEdit is in your system's PATH or provide the full path.

```autolisp
(startapp "textedit" "acad.lsp")
33
```

--------------------------------

### Get Character Code from String Position

Source: https://help.autodesk.com/view/ACD/2027/ENU?guid=GUID-5A68B31E-1EA7-434A-93FF-C05D9514A55B&p=OARX

This example demonstrates how to use vl-string-elt to get the character code of the character at the 8th position (index 7) in a given string.

```autolisp
(vl-string-elt "May the Force be with you" 8)
70
```

--------------------------------

### Get Reactor Type

Source: https://help.autodesk.com/view/ACD/2027/ENU?guid=GUID-214E70E6-A8F9-43F0-ABA4-2C0BAC06E0A9

This example demonstrates how to use the vlr-type function to get the type of a reactor object. The function returns a symbol representing the reactor's category.

```autolisp
(vlr-type circleReactor)
:VLR-Object-Reactor
```

--------------------------------

### start_image

Source: https://help.autodesk.com/view/ACD/2027/ENU?guid=GUID-FAD2CDD5-50CD-4328-B391-C898AAD4E401

Starts the creation of an image in the dialog box tile.

```APIDOC
## start_image

### Description
Starts the creation of an image in the dialog box tile.

### Function Signature
(start_image tile_name)

### Parameters
* **tile_name** (string) - The name of the dialog box tile where the image will be created.
```

--------------------------------

### Test if string starts with 'N'

Source: https://help.autodesk.com/view/ACD/2027/ENU?guid=GUID-EC257AF7-72D4-4B38-99B6-9B09952A53AD

This example demonstrates how to check if a string begins with a specific character using a wildcard pattern. The pattern 'N*' matches any string that starts with 'N'.

```autolisp
(wcmatch "Name" "N*")
```

--------------------------------

### startapp

Source: https://help.autodesk.com/view/ACD/2027/ENU?guid=GUID-FAD2CDD5-50CD-4328-B391-C898AAD4E401

Starts an external application.

```APIDOC
## startapp

### Description
Starts an external application.

### Function Signature
(startapp application_name [command_line])

### Parameters
* **application_name** (string) - The name of the application to start.
* **command_line** (string, optional) - The command line arguments to pass to the application.
```

--------------------------------

### Get Size of a File on Mac OS and Web

Source: https://help.autodesk.com/view/ACD/2027/ENU?guid=GUID-646032BF-CAC1-4166-9EBA-2C954DFF3005

Example of using vl-file-size to get the size of a file on Mac OS or Web. The function returns the file size in bytes.

```autolisp
(vl-file-size "/output.txt")
568
```

--------------------------------

### Create Environment Variables

Source: https://help.autodesk.com/view/ACD/2027/ENU?guid=GUID-3C25E517-8660-4BB7-9447-2310462EF06F

Example of creating two environment variables, one numeric and one string.

```xml
<EnvironmentVariables>
    <EnvironmentVariable
        Name="MYNUMVAR"
        Value="123"
    />

    <EnvironmentVariable
        Name="MYSTRVAR"
        Value="Example"
    />
</EnvironmentVariables>
```

--------------------------------

### Example of property promotion in dumpallproperties

Source: https://help.autodesk.com/view/ACD/2027/ENU?guid=GUID-A65FBCCF-CC5D-47E8-9117-D577D9CB9D8A

Illustrates how the 'context' argument in dumpallproperties affects property value representation. When context is 1, properties like StartPoint are promoted to individual X, Y, and Z values.

```autolisp
StartPoint (type: AcGePoint3d)  (LocalName: StartPoint) = 6.250000   8.750000  0.000000
```

```autolisp
StartPoint/X (type: double)  (LocalName: Start X) = 6.250000
StartPoint/Y (type: double)  (LocalName: Start Y) = 8.750000
StartPoint/Z (type: double)  (LocalName: Start Z) = 0.000000
```
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