Re: A83: ASM Help
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Re: A83: ASM Help
i just use movax's sprite routine so i don't know what u r talkin bout
Joe Wingbermuehle wrote:
> Don't call the buffer copy routine so often, or use a faster buffer copy
> routine. Never call a buffer copy routine when you're sprite is off! That's
> probably what you're doing.... You won't see flicker if you don't copy the
> buffer when the sprite is off.
>
> Joe Wingbermuehle
> http://www.usmo.com/~joewing/
>
> -----Original Message-----
> From: Gary Hanson <ghanson@bellsouth.net>
> To: assembly-83@lists.ticalc.org <assembly-83@lists.ticalc.org>
> Date: Wednesday, October 28, 1998 9:06 PM
> Subject: Re: A83: ASM Help
>
> >
> >well i know it doesn't flicker when i mover it slow but what if my program
> >depends on a sprite running around all the time??
> >
> >David Phillips wrote:
> >
> >> Flicker is caused by two things: slow erase/move/draw cycle and the slow
> >> lcd refresh rate. There is nothing you can do about the lcd being slow,
> >> besides not trying to move graphics too fast. The other thing that
> causes
> >> flicker is waiting too long after you erase the sprite to redraw it. The
> >> basic setup for sprites is to erase them, compute their new positions,
> then
> >> redraw all of them. If too much time passes after they are erased before
> >> they are redrawn, the user will perceive that as flicker.
> >>
> >> However, because the 83 uses a display controller and not a memory mapped
> >> display, there should not be any flicker caused by this, because it
> should
> >> only be dumped to the display controller after the sprites have been
> >> completely erased and redrawn. You are probably just moving a sprite too
> >> fast, as usually happens on your first sprite program where all you do is
> >> move a sprite around the screen. Waiting longer in between frames should
> >> solve your problem.
> >>
> >> -----Original Message-----
> >> From: Gary Hanson <ghanson@bellsouth.net>
> >> To: assembly-83@lists.ticalc.org <assembly-83@lists.ticalc.org>
> >> Date: Wednesday, October 28, 1998 8:45 PM
> >> Subject: Re: A83: ASM Help
> >>
> >> >
> >> >no im talkin about when its moving across the screen and it still blinks
> >> even when i
> >> >make it move 2 pixels at a time
> >> >Olle Hedman wrote:
> >> >
> >> >> The reson why it blinks when you hold down a key is not the
> >> spriteroutine.. its
> >> >> in your codeing.. I assume now that you mean it is blinking when you
> >> hold down
> >> >> a key, and the sprite isnt moving.. (like its at the edge of the
> screen
> >> >> or such..) the way to solve this is to never erase a sprite unless you
> >> are going
> >> >> to move it.. i you do.. it will flicker.. I mean.. when its at the
> >> edge, not
> >> >> only skip the changeing of spriteposition.. also skip the updating of
> the
> >> >> sprite..
> >> >>
> >> >> /Olle Hedman - alh
> >> >>
> >> >> Gary Hanson wrote:
> >> >> >
> >> >> > i already know some basic Assembly for the ti-83 from a help file i
> >> >> > downloaded but i wanna find out about better stuff like stuff used
> to
> >> >> > program pacman for sos and how to set it up to make levels with
> numbers
> >> >> > and stuff where can i find out about this plz help i am stuck on a
> game
> >> >> >
> >> >> > also does anyone have a sprite routine that doesn't blink when u
> hold
> >> >> > down a key (movax's)
> >> >> > help!
> >> >> > felix
> >> >
> >> >
> >
> >
> >
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