2009-07-10 - Just another pong!
To control the pads use 'q', 'a', 'p' and 'l' keys.
Copyright (c) 2008, 2009 Héctor Francisco Hernández <[email protected]>
Permission to use, copy, modify, and/or distribute this software for any purpose with or without fee is hereby granted, provided that the above copyright notice and this permission notice appear in all copies.
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
package require Tk
canvas .canvas -width 520 -height 390 -bg green4 label .lblbtm -textvariable lblbtm pack .canvas pack .lblbtm -fill x
.canvas create rectangle 10 156 25 234 -tag pad1 -fill gray -outline gray .canvas create rectangle 495 156 510 234 -tag pad2 -fill gray -outline gray .canvas create oval 255 190 265 200 -tag ball -fill white -outline white
wm title . "tkpong" wm protocol . WM_DELETE_WINDOW exit
bind . <Escape> exit bind . <KeyPress-q> {set pad1ay -0.001} bind . <KeyPress-a> {set pad1ay 0.001} bind . <KeyRelease-q> {set pad1ay 0} bind . <KeyRelease-a> {set pad1ay 0} bind . <KeyPress-p> {set pad2ay -0.001} bind . <KeyPress-l> {set pad2ay 0.001} bind . <KeyRelease-p> {set pad2ay 0} bind . <KeyRelease-l> {set pad2ay 0}
while 1 {
set pad1y 195
set pad1ay 0
set pad1vy 0
set pad2y 195
set pad2ay 0
set pad2vy 0
set plyr1pts 0
set plyr2pts 0
set lblbtm "Press \"Return\" to start or \"Esc\" to exit."
bind . <Return> {set sleep {}}
tkwait variable sleep
bind . <Return> {}
while {10 > $plyr1pts && 10 > $plyr2pts} {
set n 0
set ballx 260
set bally 195
set ballvx [expr {rand () < 0.5 ? -0.2 : 0.2}]
set ballvy [expr {rand () * 0.1 - 0.05}]
set lblbtm "$plyr1pts - $plyr2pts"
while {-5 < $ballx && 525 > $ballx} {
set pad1vy [expr {0 < $pad1y && 390 > $pad1y \
|| 0 >= $pad1y && 0 <= $pad1vy && 0 < $pad1ay \
|| 390 <= $pad1y && 0 >= $pad1vy && 0 > $pad1ay \
? $pad1vy + $pad1ay : 0}]
set pad1y [expr {$pad1y + $pad1vy}]
set pad2vy [expr {0 < $pad2y && 390 > $pad2y \
|| 0 >= $pad2y && 0 <= $pad2vy && 0 < $pad2ay \
|| 390 <= $pad2y && 0 >= $pad2vy && 0 > $pad2ay \
? $pad2vy + $pad2ay : 0}]
set pad2y [expr {$pad2y + $pad2vy}]
set ballx [expr {$ballx + $ballvx}]
set bally [expr {$bally + $ballvy}]
set ballvy [expr {5 > $bally && 0 > $ballvy
|| 385 < $bally && 0 < $ballvy ? -$ballvy : $ballvy}]
if {25 > $ballx && 20 < $ballx && 0 > $ballvx} {
if {$pad1y - 45 < $bally && $pad1y + 45 > $bally} {
set ballvx [expr {-$ballvx + 0.01}]
set ballvy [expr {$ballvy + ($bally - $pad1y) / 45.0 * 0.15 + \
$pad1vy * 0.4}]
}
} elseif {500 > $ballx && 495 < $ballx && 0 < $ballvx} {
if {$pad2y - 45 < $bally && $pad2y + 45 > $bally} {
set ballvx [expr {-$ballvx - 0.01}]
set ballvy [expr {$ballvy + ($bally - $pad2y) / 45.0 * 0.15 + \
$pad2vy * 0.4}]
}
}
if {0 == $n % 20} {
.canvas coords pad1 10 [expr {$pad1y - 39}] 25 [expr {$pad1y + 39}]
.canvas coords pad2 495 [expr {$pad2y - 39}] 510 [expr {$pad2y + 39}]
.canvas coords ball [expr {$ballx - 5}] [expr {$bally - 5}] \
[expr {$ballx + 5}] [expr {$bally + 5}]
after 20 {set sleep {}}
tkwait variable sleep
}
incr n
}
set plyr1pts [expr {525 < $ballx ? $plyr1pts + 1 : $plyr1pts}]
set plyr2pts [expr {-5 > $ballx ? $plyr2pts + 1 : $plyr2pts}]
}
tk_messageBox -parent . -title "Congratulations!" \
-message "Player [expr {10 == $plyr1pts ? "one" : "two"}] wins."}