But we also hear more and more little voices saying best is the enemy of good NET environment. We hear that NET is better, is faster, is more powerful than what we had until now. Gabriel Philip Greenspun 10th rule David A. Lisp machines TI Explorer Space-cadet keyboard. Best 45hw catalogĪutomatic storage management Conditionals Dynamic typing Higher-order functions Linked lists M-expressions deprecated Read-eval-print loop Recursion S-expressions Self-hosting compiler Tree data structures. Retrieved 14 April Archived from the original on 15 April Archived from the original on Autodesk AutoCAD. The above example could also be written using built-in AutoCAD commands to achieve the same result, however this approach is susceptible to changes to the command prompts between AutoCAD releases. The function requires no parametersand contains one local variable 'pnt'. The function would then place a marker at that point, and create a one-line text object next to it, containing the X and Y coordinates of the point expressed relative to the active User Coordinate System UCS. The user, upon typing 'pointlabel' at the AutoCAD command line, would be prompted to pick a point, either by typing the X and Y coordinates, or clicking a location in the drawing. The name of the function includes a special prefix 'c:', which causes AutoCAD to recognize the function as a regular command.
#AUTOCAD LISP PRINC STRING AND VARIABLE CODE#
The above code defines a new function which generates an AutoCAD point object at a given point, with a one-line text object displaying the X and Y coordinates beside it. Therefore, without the final call to the princ function, the result of this would be. Note the final line inside the function definition: when evaluated with no arguments, the princ function returns a null symbol, which is not displayed by the AutoCAD command-line interface. This is part of a long-term process of changing from VBA to. However, it has remained AutoCAD's main user customizing language. After that, its development was neglected by Autodesk in favor of more fashionable development environments like Visual Basic for Applications VBA. AutoLISP code can interact with the user through AutoCAD's graphical editor by use of primitive functions that allow the user to pick points, choose objects on screen, and input numbers and other data. The properties of these graphical entities are revealed to AutoLISP as association lists in which values are paired with AutoCAD group codes that indicate properties such as definitional points, radii, colors, layers, linetypes, etc. Examples Set variable x : setq x This affects the values returned by rtos for engineering, architectural, and fractional formats, as shown in the following examples: setvar "unitmode" 1 1 setq fmtval rtos x 3 2 "1'5.AutoLISP is a small, dynamically scopeddynamically typed Lisp language dialect with garbage collectionimmutable list structure, and settable symbols, lacking in such regular Lisp features as macro system, records definition facilities, arrays, functions with variable number of arguments or let bindings. Return Values Type: String Formatted numeric value. The mode can be one of the following numbers: 1 - Scientific 2 - Decimal 3 - Engineering feet and decimal inches 4 - Architectural feet and fractional inches 5 - Fractional precision Type: Integer Precision used to format the returned value. This affects the values returned by rtos for engineering, architectural, and fractional formats, as shown in the following examples.
Convert the value of x to a string in fractional format. Twin hull boatsĬonvert the value of x to a string in scientific format, with a precision of Convert the value of x to a string in decimal format, with 2 decimal places.Ĭonvert the value of x to a string in engineering format, with a precision of Convert the value of x to a string in architectural format. Wesib amharic storyįormatted numeric value. Precision used to format the returned value. The mode can be one of the following numbers.