;;; ;
;;; GPMAIN.LSP ;
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;;;--------------------------------------------------------------------;
;;; This file is from the Garden Path tutorial, and represents the ;
;;; state of the application at the end of Lesson 5. Use this file ;
;;; to check your work, or to start off Lesson 6 with the code as it ;
;;; appears in the tutorial. ;
;;;--------------------------------------------------------------------;
;;;********************************************************************;
;;; Function: C:GPath The Main Garden Path Function ;
;;;--------------------------------------------------------------------;
;;; Description: This is the main garden path function. It is a C: ;
;;; function, meaning that it is turned into an AutoCAD ;
;;; command called GPATH. This function determines the ;
;;; overall flow of the Garden Path program ;
;;;********************************************************************;
;;; The gp_PathData variable is an association list of the form: ;
;;; (10 . Starting Point) -- A list of 3 reals (a point) denotes ;
;;; the starting point of the garden path ;
;;; (11 . Ending Point) -- A list of 3 reals (a point) denotes ;
;;; the ending point of the garden path ;
;;; (40 . Width) -- A real number denoting boundary width ;
;;; (41 . Length) -- A real number denoting boundary length ;
;;; (50 . Path Angle) -- A real number denoting the angle of the ;
;;; path, in radians ;
;;; (42 . Tile Size) -- A real number denoting the size ;
;;; (radius) of the garden path tiles ;
;;; (43 . Tile Offset) -- Spacing of tiles, border to border ;
;;; ( 3 . Object Creation Style) ;
;;; -- The object creation style indicates how ;
;;; the tiles are to be drawn. The ;
;;; expected value is a string and one ;
;;; one of three values (string case is :
;;; unimportant): ;
;;; "ActiveX" ;
;;; "Entmake" ;
;;; "Command" ;
;;; ( 4 . Polyline Border Style) ;
;;; -- The polyline border style determines ;
;;; the polyline type to be used for the ;
;;; path boundary. The expected value ;
;;; one of two values (string case is :
;;; unimportant): ;
;;; "Pline" ;
;;; "Light" ;
;;;********************************************************************;
(defun C:GPath (/ gp_PathData gp_dialogResults PolyLineName
TileList)
(setvar "OSMODE" 0)
;; Ask the user for input: first for path location and
;; direction, then for path parameters. Continue only if you have
;; valid input. Store the data in gp_PathData
(if (setq gp_PathData (gp:getPointInput))
(if (setq gp_dialogResults (gp:getDialogInput (cdr(assoc 40 gp_PathData))))
(progn
;; Now take the results of gp:getPointInput and append this to
;; the added information supplied by gp:getDialogInput
(setq gp_PathData (append gp_PathData gp_DialogResults))
;; At this point, you have all the input from the user.
;; Draw the outline, storing the resulting polyline "pointer"
;; in the variable called PolylineName
(setq PolylineName (gp:drawOutline gp_PathData))
;; Next, it is time to draw the tiles within the boundary.
;; The gp_tileList contains a list of the object pointers for
;; the tiles. By counting up the number of points (using the
;; length function), we can print out the results of how many
;; tiles were drawn.
(princ "\nThe path required ")
(princ
(length
(setq tileList (gp:Calculate-and-Draw-Tiles gp_PathData))
)
)
(princ " tiles.")
) ;_ end of progn
(princ "\nFunction cancelled.")
) ;_ end of if
(princ "\nIncomplete information to draw a boundary.")
) ;_ end of if
(princ) ; exit quietly
) ;_ end of defun
;;; Display a message to let the user know the command name
(princ "\nType GPATH to draw a garden path.")
(princ)
