5422 |
;; |
;; |
5423 |
;; a. Create one draw-function that draws your shape and one |
;; a. Create one draw-function that draws your shape and one |
5424 |
;; undraw-function that undraws it. The draw- and |
;; undraw-function that undraws it. The draw- and |
5425 |
;; undraw-functions are used to to draw/undraw a segment of |
;; undraw-functions are used to draw/undraw a segment of |
5426 |
;; your poly-point mode between 2 points. The draw- and |
;; your poly-point mode between 2 points. The draw- and |
5427 |
;; undraw-functions are then really 2-point mode functions. |
;; undraw-functions are then really 2-point mode functions. |
5428 |
;; They must take the same arguments and return the same |
;; They must take the same arguments and return the same |