Hi, everyone!
I've been working on a Pacman game for the nspire in Lua, but I've encountered a major problem, and I have no idea what's wrong.
The problem: I made a function wallcheck() to check if Pacman ran into a wall, which stops him from moving. It works fine when the script is first created, but as soon as I use an arrow, it completely ignores the wallcheck() function an proceeds to run through walls.
I've tried just about everything, to no avail.
Please help!
Here is the code for my game thus far.
function on.enterKey()
maze={{0,0,0,0,0,1,1,0,0,1,1,0,0,0,0,0}}
leveldata={{4,4,1,50,50,50,6}}
mazewidth=leveldata[lev][1]
mazeheight=leveldata[lev][2]
move=leveldata[lev][3]
blockwidth=leveldata[lev][4]
pacx=leveldata[lev][5]
pacy=leveldata[lev][6]
gm=leveldata[lev][7]
dir=1
mouth=1
m=1
timer.start(.01)
end

function on.tabKey()
lev=1
on.enterKey()
end

function dirx()
if dir==1 then
return move
elseif dir==2 or dir==4 then
return 0
else
return 0-move
end
end

function diry()
if dir==4 then
return move
elseif dir==1 or dir==3 then
return 0
else
return 0-move
end
end

function wallcheck()
if dir==1 then
if maze[lev][gm+1]==0 then
return false
else
return true
end
elseif dir==2 then
if maze[lev][gm-mazewidth]==0 then
return false
else
return true
end
elseif dir==3 then
if maze[lev][gm-1]==0 then
return false
else
return true
end
elseif dir==4 then
if maze[lev][gm+mazewidth]==0 then
return false
else
return true
end
end
end

function gmchange()
if dir==1 then
gmchan=1
elseif dir==2 then
gmchan=0-mazewidth
elseif dir==3 then
gmchan=0-1
elseif dir==4 then
gmchan=mazewidth
end
end

on.tabKey()

function on.paint(gc)
for a=1, mazeheight do
for b=1, mazewidth do
local n=maze[lev][mazewidth*(a-1)+b]
if n==0 then
gc:fillRect(blockwidth*(b-1),blockwidth*(a-1),blockwidth,blockwidth)
end
end
end
gc:fillArc(pacx,pacy,blockwidth,blockwidth,45,315+45*mouth)
end

function on.timer()
if m~=blockwidth then
pacx=pacx+dirx()
pacy=pacy+diry()
m=m+1
elseif m==blockwidth then
gmchange()
gm=gm+gmchan
if wdir~=0 then
dir=wdir
wdir=0
end
if wallcheck() then
pacx=pacx+dirx()
pacy=pacy+diry()
m=1
end
end
mouth=0-mouth
platform.window:invalidate()
end

function on.arrowKey(key)
if key=="left" then
if m~=blockwidth then
wdir=3
else
dir=3
end
elseif key=="right" then
if m~=blockwidth then
wdir=1
else
dir=1
end
elseif key=="up" then
if m~=blockwidth then
wdir=2
else
dir=2
end
elseif key=="down" then
if m~=blockwidth then
wdir=4
else
dir=4
end
end
platform.window:invalidate()
end
EDIT: Removed things that do not immediately pertain to the problem.

First try to locate the problem by removing the code which doesn't contribue to it.
Use a set of calls to print() to identify precisely what's wrong with the program flow. Tell us what you expected to be printed, and what is actually printed.
You will probably get more help with this.

Print? This is for the nspire...
I'll try removing the unnecessary stuff, but at this point, there isn't much of that.

print() outputs strings to the console on nspire_emu.

That's a problem... I can't get nspire_emu to work on my computer w/ OS 3.0.1.
It just gives me the screen it gave the bricked calcs.

Yup, I even talked to Goplat, followed his instructions, didn't work.

PianoMan, if the PacMan is for the Contest, I'm not sure if you can share the whole code And you just did...

Sorry for the delay in the reply.
Jim, thanks for the advice, I'm working on doing that.
No, this isn't for the contest. I'm working on an RPG for the contest, although I may have to switch to a puzzle game... I'm running out of plot ideas.