User input Functions

Function	Description
(initget [integer] [string])	Initializes the next user input function.
(getreal [string])	Prompts the user to enter a real number.
(getstring [value] [string])	Prompts the user to enter a string.
(getpoint [point_list] [string])	Prompts the user to specify a point.
(getcorner point_list [string])	Prompts the user to specify a second corner of a rectangle.
(getdist [point] [prompt])	Prompts the user to specify a distance.
(getangle [point_list] [string])	Prompts the user to specify an angle.
(getorient [point_list] [string])	Prompts the user to specify an angle (takes into account ANGBASE).
(getkword [string])	Prompts the user to select an option.
(getint [string])	Prompts the user to enter an integer value.

1. initget: This function initializes keywords or input filters.

(initget [flags] [keywords])

Flags: This is control flag for next input function.

Ex. (initget 7)

(getint “\nOnly Integer value ”)

2. getreal : This function ask for user input of real number and returns real number

(getreal [prompt])

Ex. (getreal “Width:”)

Width:» 2.5

2.5

3.getstring: This function prompts user to input text string.

(getstring [flag] [prompt])

Ex. (getstring T “You can enter words with spaces”)

(getstring “one Word only”)

4. getpoint: This function asks you to enter a point .

(getpoint [point] [prompt])

Ex. (getpoint)

Now click in GA or input point to get point : lets say 0,0

It will return as (0.0 0.0 0.0)

(getpoint “Click in GA”)

Click in GA» (Click in GA)

(5.89125841 1.41504584 0.0)

5. getcorner: This function asks user to enter opposite corner of rectangle.

(getcorner point [prompt])

Ex. (getcorner ‘(0 0) “Specify corner point: “)

Specify corner point: » (Click in GA or input corner point for rectangle.)

6. getdist: This function asks for user input for two points to return distance between them.

(getdist [point] [prompt])

Ex. (getdist ‘(0 0) “Specify Second point: “)

Specify Second point: » 5,0

5.0

7. getangle: This function asks user to enter angle , Here point argument is for base point to calculate angle, if point is not specified then user have to input both the points to calculate angle between them . Angle increases in counter clockwise direction.

(getangle [point] [prompt])

Ex. (getangle ‘(0 0) “Specify second point”)

Specify second point»

The calculated angle is return in Radians .

Related functions: getorient .

Related system variables: ANGBASE, ANGDIR , AUINTS

8.getorient: This function is same as getangle

(getorient [point] [prompt])

9. getkword: This is important function to ask user to input any keyword for options

The keyword options are set in initget function (See point 1 above)

Ex. (initget 257 “Yes NO”)

nil