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|
set helpmsg "Game of Life
Keys:
<space>\ttoggle
<q>\tquit
<c>\tclear
<r>\trandom
<F1>\thelp"
package require Tk
bind . <q> {exit}
frame .f
canvas .f.c -background gray
button .f.bt -text Stop -command toggle
button .f.bs -text Step -command {set ::interrupt 1; process_bricks; draw_bricks}
button .f.bc -text Clear -command clear
button .f.br -text Random -command random
button .f.bq -text Quit -command exit
grid .f -column 0 -row 0
grid .f.c -column 0 -row 0 -columnspan 3
grid .f.bt -column 0 -row 1
grid .f.bs -column 1 -row 1
grid .f.bc -column 2 -row 1
grid .f.br -column 0 -row 2
grid .f.bq -column 1 -row 2
set ::heldbutton 0
bind . <space> {toggle}
bind . <c> clear
bind . <r> random
bind . <F1> {set ::interrupt 1; help}
bind .f.c <ButtonPress> {set ::heldbutton %b; handle_mouse %b %x %y}
bind .f.c <ButtonRelease> {set ::heldbutton 0}
bind .f.c <Motion> {if {$::heldbutton} {handle_mouse $::heldbutton %x %y}}
set timestep 50; # ms
set BWIDTH 10
set BHEIGHT 10
set BRICK_NX [expr {[winfo reqwidth .f.c] / $BWIDTH}]
set BRICK_NY [expr {[winfo reqheight .f.c] / $BHEIGHT}]
set GAP 0
proc init_bricks {value} {
set bricks {}
for {set j 0} {$j < $::BRICK_NY} {incr j} {
lset bricks $j {}
for {set i 0} {$i < $::BRICK_NX} {incr i} {
lset bricks $j $i [expr $value]
}
}
return $bricks
}
proc draw_bricks_init {} {
for {set j 0} {$j < $::BRICK_NY} {incr j} {
for {set i 0} {$i < $::BRICK_NX} {incr i} {
set x0 [expr {$::BWIDTH * $i}]
set y0 [expr {$::BHEIGHT * $j}]
set b [lindex $::bricks $j $i]
set color [expr {$b ? "black" : "white"}]
lset ::rect_ids $j $i [.f.c create rectangle \
$x0 $y0 [expr {$x0 + $::BWIDTH - $::GAP}] [expr {$y0 + $::BHEIGHT - $::GAP}] \
-fill $color -outline grey]
}
}
}
proc draw_bricks {} {
for {set j 0} {$j < $::BRICK_NY} {incr j} {
for {set i 0} {$i < $::BRICK_NX} {incr i} {
set x0 [expr {$::BWIDTH * $i}]
set y0 [expr {$::BHEIGHT * $j}]
set b [lindex $::bricks $j $i]
set color [expr {$b ? "black" : "white"}]
.f.c itemconfigure [lindex $::rect_ids $j $i] -fill $color
}
}
}
proc process_bricks {} {
for {set j 0} {$j < $::BRICK_NY} {incr j} {
for {set i 0} {$i < $::BRICK_NX} {incr i} {
set neighbours 0
set b [lindex $::bricks $j $i]
foreach dx {-1 0 1} {
foreach dy {-1 0 1} {
set ii [expr {$i + $dx}]
set jj [expr {$j + $dy}]
if {$jj >= $::BRICK_NY || $jj < 0 || $ii >= $::BRICK_NX || $ii < 0 || (($dx==0)&&($dy==0)) } {
continue
}
incr neighbours [lindex $::bricks $jj $ii]
}
}
if {$neighbours < 2 || $neighbours > 3} {
lset ::newbricks $j $i 0
} elseif {$b && $neighbours == 2} {
lset ::newbricks $j $i 1
} elseif {$neighbours == 3} {
lset ::newbricks $j $i 1
} else {
lset ::newbricks $j $i 0
}
}
}
set ::bricks $::newbricks
}
set interrupt 0
proc loop {} {
if {$::interrupt} {return}
process_bricks
draw_bricks
after $::timestep loop
}
proc toggle {} {
if {$::interrupt} {
.f.bt configure -text Stop
set ::interrupt 0
loop
} else {
.f.bt configure -text Start
set ::interrupt 1
}
}
proc help {} {
tk_messageBox -message $::helpmsg
}
proc handle_mouse {b x y} {
# button 1 sets on, button 3 sets off. therefore map 1->1, 3->0, ignore 2.
if {$b == 2} return
set b [expr {(3-$b)/2}]
set col [expr {$x / $::BWIDTH}]
set row [expr {$y / $::BHEIGHT}]
# check in range?
lset ::bricks $row $col $b
draw_bricks
}
proc clear {} {
set ::bricks [init_bricks 0]
draw_bricks
}
proc random {} {
set ::bricks [init_bricks round(rand())]
draw_bricks
}
set bricks [init_bricks round(rand())]
set newbricks [init_bricks 0]
set rect_ids [init_bricks 0]
draw_bricks_init
loop
|
