Draw and Refresh faster

[hung]

To simulate a walking dog, I made use of forelayer and image lib (drawer) to erase last area then draw image on new position again. The transparency and partial refresh work fine.

However, the refresh speed is slow that I feel my the image is jumpping. Any way to draw image and refresh faster?

I am using Dopod D810 WM6, CPU Samsung (R) 2442 with 400Mhz. The timer interval is set to 1 already.

Thanks in advance..

[Erel]

Can you post your code?

[hung]

Attached the little lengthy code. I used image and form lib.

It is fast enough when run on PC but slow on PPC.

Here is the key code:

sub repaint

' handle mapwin move
if mapwin.moved = 1 then

'erase all sp
for ii = 0 to spcnt - 1
sphide(ii)
next

' redraw mapwin
mapwin.x = min(bmpmap.Width - mapwin.w, max(0, mapwin.x + mapwin.dx) )
mapwin.y = min(bmpmap.Height - mapwin.h, max(0, mapwin.y + mapwin.dy) )
rectsrc.x = mapwin.x
rectsrc.Y = mapwin.y
rectsrc.Width = mapwin.w
rectsrc.Height = mapwin.h
rectdst.X = mapscr.x
rectdst.y = mapscr.y
rectdst.width = mapscr.w
rectdst.height = mapscr.h
drawerb.DrawImage1(bmpmap.Value, rectsrc.Value, rectdst.Value, true)
drawerb.Refresh2(rectdst.Value)

mapwin.moved = 0
mapwin.dx = 0
mapwin.dy = 0

form1.Line(10, 10, 60, 60, cRed, B)

for ii = 0 to spcnt - 1
spshow(ii)
next

end if
' handle sp move
for ii = 0 to spcnt - 1
if spmap(ii).moved = 1 and ii <> spselected then
spmove(ii)
end if
next
end sub


sub spshow(nsp)
if spinwin(nsp) then
rectsrcs.X = 50 * spmap(nsp).pg
rectsrcs.Y = 0
rectsrcs.Width = spmap(nsp).w
rectsrcs.Height = spmap(nsp).h

rectdsts.X = scrx(spmap(nsp).x)
rectdsts.Y = scry(spmap(nsp).y)
rectdsts.Width = spmap(nsp).w
rectdsts.Height = spmap(nsp).h

drawerf.DrawImage1(bmpsprite.Value, rectsrcs.Value, rectdsts.Value, true)
drawerf.Refresh2(rectdsts.Value)

end if
end sub

sub sphide(nsp)
'erase original image on screen
rectdsts.X = scrx(spmap(nsp).x)
rectdsts.Y = scry(spmap(nsp).y)
rectdsts.Width = spmap(nsp).w
rectdsts.Height = spmap(nsp).h
drawerf.fillrectangle(brushs.Value, rectdsts.Value) ' clear last sprite pos
drawerf.Refresh2(rectdsts.Value)

end sub


sub spmove(nsp) ' always move towards x + dx, y + dy
'erase original image on screen
sphide(nsp)

'move to new pos on bmpmap
spmap(nsp).x = min(bmpmap.Width - spmap(nsp).w, max(0, spmap(nsp).x + spmap(nsp).dx))
spmap(nsp).y = min(bmpmap.Height - spmap(nsp).h, max(0, spmap(nsp).y + spmap(nsp).dy))
' draw sp again
spshow(nsp)

spmap(nsp).moved = 0
spmap(nsp).dx = 0
spmap(nsp).dy = 0

if ptinrect(spmap(nsp).x, spmap(nsp).y, 10, 10, 60, 60) then
if spmap(nsp).acc = 0 then spslide(nsp)
end if

end sub

[Erel]

You can see this example for a simple moving image: http://www.basic4ppc.com/files/BouncingSmiley.zip
This example runs pretty smooth, however moving more images will be slower (like in your case).