move_turtle3.txt
2 KB
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move_turtle3.txt
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; Purpose: To play with keyboard controls
; Copyright © 2004 by Rupert Russell
; e-mail: rupert.russell1@gmail.com
; URL: http://www.rupert.id.au/microworlds/
; Created: October 22, 2004
;
; This program is free software; you can redistribute it and/or modify
; it under the terms of the GNU General Public License as published by
; the Free Software Foundation; either version 2 of the License, or
; (at your option) any later version.
;
; This program is distributed in the hope that it will be useful,
; but WITHOUT ANY WARRANTY; without even the implied warranty of
; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
; GNU General Public License for more details.
;
; You should have received a copy of the GNU General Public License
; along with this program; if not, write to the Free Software
; Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
; ----------------------------------------------------------------------
to startup
; this procedure is called each time the project is loaded
; it sets up default values
make "true 1
make "false 0
make "step 50
make "pensize 5
setpensize :pensize
note 127 1
t_info, st ; show the instructions turtle
make "show_info :true
setsh_all_off
make "offset 5
make "browns 999
make "blues 100
make "greens 60
make "yellows 45
make "reds 12
make "magentas 115
greens ; set the default brush to greens
line_up_turtles
end
to move_turtle
pd
make "ch ascii readchar
if :ch = 38 [t1, seth 0 fd :step]
; north
if :ch = 40 [t1, seth 180 fd :step]
; south
if :ch = 39 [t1, seth 90 fd :step]
; east
if :ch = 37 [t1, seth 270 fd :step]
; west
; >. key increases the step size the
if :ch = 46 [
make "step (:step + 1)
cc
show (se "step "size :step)
show se "pensize :pensize
]
; <, key reduces the step size the
if :ch = 44 [
if :step > 1 [
make "step (:step - 1)
cc
show (se "step "size :step)
show se "pensize :pensize
]
]
; increase pensize
if :ch = 120 [
if :pensize < 100 [
make "pensize :pensize + 1
setpensize :pensize
cc
show (se "step "size :step)
show se "pensize :pensize
]
]
; reduce pensize
if :ch = 122 [
if :pensize > 1 [
make "pensize :pensize - 1
cc
show (se "step "size :step)
show se "pensize :pensize
]
setpensize :pensize
]
setc (random :offset) + :colour
; change the colour
move_turtle
end
to go
t_info, ht ; hide the instructions turtle
snapshot ; record the current screen
make "show_info :true
move_turtle
end
to line_up_turtles
; align and distribute the 15 coloured turtles
make "x_offset 132
make "y_offset -198
make "count 0
repeat 15 [
run (word char 32 "t_show_unknown_colour_
:count ", char 32 "setx char 32 :x_offset + :count * 8)
run (word char 32 "t_show_unknown_colour_
:count ", char 32 "sety char 32 :y_offset)
make "count :count + 1
]
end
to setsh_all_off
; set all turtles to "off
t_browns, setsh "browns_off
t_random, setsh "random_off
t_blues, setsh "blues_off
t_greens, setsh "greens_off
t_yellows, setsh "yellows_off
t_reds, setsh "reds_off
t_magentas, setsh "magentas_off
t_unknown, setsh "unknown_off
end
to blues
setsh_all_off
t_blues, setsh "blues_on
make "offset 5
make "colour :blues
show_colours :colour :offset
end
to magentas
setsh_all_off
t_magentas, setsh "magentas_on
make "offset 8
make "colour :magentas
show_colours :colour :offset
end
to reds
setsh_all_off
t_reds, setsh "reds_on
make "offset 5
make "colour :reds
show_colours :colour :offset
end
to yellows
setsh_all_off
t_yellows, setsh "yellows_on
make "offset 3
make "colour :yellows
show_colours :colour :offset
end
to browns
setsh_all_off
t_browns, setsh "browns_on
make "offset 5
make "colour :browns
show_colours :colour :offset
end
to greens
setsh_all_off
t_greens, setsh "greens_on
make "offset 5
make "colour :greens
show_colours :colour :offset
end
to random_colour
; every line is a different random colour
setsh_all_off
t_random, setsh "random_on
make "offset 999
make "colour :blues
show_random_colours
end
to unknown
; pick a random range of colours
setsh_all_off
t_unknown, setsh "unknown_on
make "offset 15
make "colour random 999
show_colours :colour :offset
end
to show_random_colours
; set the colour of each turtle in the plalet to a random colour
make "count 0
repeat 15 [
run (word "t_show_unknown_colour_ :count ",
char 32 "setc char 32 random 999)
make "count :count + 1
]
; show all the coloured turtles
make "count 0
repeat 15 [
run (word "t_show_unknown_colour_ :count ", char 32 "st)
make "count :count + 1
]
end
to show_colours :colour :offset
; displays the current colours using a pallet of up to 15 turtles
; hide all the turtles in the pallet
make "count 0
repeat 15 [
run (word "t_show_unknown_colour_ :count ", char 32 "ht)
make "count :count + 1
]
; set the colour of each turtle in the pallet
make "count 0
repeat :offset [
run (word "t_show_unknown_colour_ :count ",
char 32 "setc char 32 :colour + :count)
make "count :count + 1
]
; show only the correct number of turtles in the current pallet
make "count 0
repeat :offset [
run (word "t_show_unknown_colour_ :count ", char 32 "st)
make "count :count + 1
]
end
to ?
; toggle the instructions
ifelse :show_info = :true [
t_info, st ; show the instructions
make "show_info :false ; don't show them next time
]
[
t_info, ht ; hide the instructions
make "show_info :true ; show them next time
]
end
APA citation:
Russell, R. (2016, July 04, 04:17 pm). move_turtle3 code.
Retrieved April 17, 2024, from http://www.rupert.id.au/microworlds/code/move_turtle3.php
