Re: TIB: Re:GetKey

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Re: TIB: Re:GetKey




On Thu, 03 Dec 1998 08:28:14 PST "Josh Cunningham"
<rogue_ant@hotmail.com> writes:
>
>>Thanks to everybody, but my routines are just not moving fast enough. 
> 
>In the
>>RPG I'm creating, Bubba's Quest (watch for it:)), I have a little 
>character
>>made of 2 letters (O and an X under it).  that moves around the 
>screen.  
>If he
>>reaches the border of the screen, the game loads the next screen (a 
>string)
>>into a string where it is used by the program.  But enough with the 
>background
>>junk, here's what my problem is-  
>>	
>>	The game takes about a second to move the character!  And 
>with the Ans
>>variable, it appears to slowdown more each time you move before 
>finally
>>greeting you with a MEMORY ERROR!  I remember reading some code that 
>
>used the
>>Return statement and the Ans var to move the character, but it 
>wasn't
>>documented very well.   The writer said this made it faster.  I need 
>to 
>know
>>the fastest statement I can use for multiple keys.  All help is 
>appreciated:)
>>
>>Tatsuo
>>
>  
>  Tatsuo, use the routine I posted, instead of using the plxon 
>statement, supplement it with the Text( statements.  You will find 
>this 
>to be way faster then one second, and minimal memory errors.  I am 
>working on a new Getkey routine that will be very fast.  I'm 
>estimating 
>about 1.5 times as fast as the one I posted.  But untill I get some 
>inspiration, it wont be done.
>
>Josh Cunningham


Hello!  My name is Philip and I'm new to the ti-basic list so I don't
know exactly the background behind this e-mail but I may be able to help.
 I would consider myself an expert in TI85/86-Basic and Moderately
knowledgeable in TI86 assembly.
Anyway, about the MEMORY ERRORS you are getting:
The ONLY way you can get a memory error in TI-BASIC is if you do a
considerable 
number of 'IF' statements without reaching an 'End' command. 
For example:
   :1->A
   :If a==1
   :Then
   :Goto B
   :End
If you have jumps like this in your program, the program will execute the
'Goto' command and never reach the 'End' statement.  The calculator
thinks that the 
"If-Then" loop was never completed and so it stores it in MEM (actually a
stack).
As the program continues to to execute loops like the one above, the
calculator will gradually slow down as the MEM fills up with uncompleted
"If-Then" loops.  Eventually you will get a MEMORY ERROR.

Let me know if this helps, and what calc you are using.

Philip
------------------------------
pmadsen@juno.com
------------------------------
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