Help. sprites are making me mad.

[bbond007]

I use AddIntServer() and things work for me.  I do my animated overlay sprite, music playback routine and some other stuff with it.

i compiled and linked this in without even changing one line...
just called vblank_start(). not doing anything with the signal....
instant crash.


http://ftp://ftp.back2roots.org/pub/back2roots/cds/xetec/fish_n_more_vol3/fishdisks/101-125/disk_105/drunkenmouse/vblank.c

so the i tried this program:
#include
int main()
{
   vblank_start();
   scanf("%c");
   vblank_end();
}

this is really discouraging.

[Piru]

   scanf("%c");

That for sure can crash. It reads a char and places it to random location in memory.

The example code is very very old. It lacks __interrupt __saveds for the interrupt code (vbinter).

I'm also not understanding vBlankInterrupt.is_data is used for. Is it like DOS where when you have an interrupt you have no clue where your data segment points? That can't be right.

is_Data is used to pass a user controlled data to the interrupt routine (it arrives in A1 register). Typically this is used if the code cannot use static variables (and thus __saveds cannot be used), for example where there might be several different interrupts  added, each with unique instance data.

[bbond007]

That for sure can crash. It reads a char and places it to random location in memory.

The example code is very very old. It lacks __interrupt __saveds for the interrupt code (vbinter).

yeah, too bad it crashes before i type the char... i'll try __interrupt (i did have __saveds)..

thanks!

as an interesting note, i see that i don't have to worry about screen->TopEdge it seems, MoveSprite always positions the sprites relative to the screen. so just calling it is enough to get the desired effect.

I ended up just replacing my Wait(signal) with Delay(1) so my main loop constantly runs (calling MoveSprite) but that is not good form i'm sure.


UPDATE:
__interupt fixed the problem!

i  bet it would even have fixed the  AddTOF() method....

thanks! results look better

[ChaosLord]

I was going to mention __interrupt as soon as u said SASC but when I searched my 100,000s of lines of source code I could not find it anywhere. (?)  So I got puzzled and forgot about it.... **scratching head**

as an interesting note, i see that i don't have to worry about  screen->TopEdge it seems, MoveSprite always positions the sprites  relative to the screen. so just calling it is enough to get the desired  effect.

hehehe kewl trick.  I might possibly use that one myself.

[ChaosLord]

I found out why I have no __interrupt in my sources.

Because Real Men(tm) code their interrupts in asm!

[bbond007]

I found out why I have no __interrupt in my sources.

Because Real Men(tm) code their interrupts in asm!

assembler, blah...  i have had enough crashes for now.

i did get my sprite toolbar working... happy with the results.

thanks for the help!