struggle on using/implementing sprite libraries

[boriel]

since a long time i was thinking how simple or possible would be using sprite engines/libraries on zxbasic-compiler (just like those used on z88dk and so on)

so i started to try this (very glitchy and inefficient, as the code shows...   )

(wsad or cursors for moving)

Code:

ink 1 border 1:ink 5:bright 1: paper 1: cls sub putudgsprite(txp1 as uinteger,typ1 as uinteger,tad1 as uinteger)   poke uinteger $5C7B,tad1+(7-(typ1 mod 8))+(txp1 mod 8)*32   print at int(typ1/8),int(txp1/8);"\A\C"   print at 1+int(typ1/8),int(txp1/8);"\B\D"   end sub yo=0:xo=0 putudgsprite(xo,yo,@udg01) x1=128:y1=128 do   cn1=((255-(in 64510)) band 2)/2 bor ((255-(in 65022)) band 2) bor ((255-(in 65022)) band 1)*4 bor ((255-(in 65022)) band 4)*2 :'- wsad   cn2=((255-(in 61438)) band 8)/8 bor ((255-(in 61438)) band 16)/8 bor ((255-(in 63486)) band 16)/4 bor ((255-(in 61438)) band 4)*2 :'-7658   cn0=cn1 bor cn2   x1=x1-((cn0 band 4)/4)   x1=x1+((cn0 band 8)/8)   y1=y1-((cn0 band 1)/1)   y1=y1+((cn0 band 2)/2)   over 1    putudgsprite(xo,yo,@udg01)   xo=x1:yo=y1   putudgsprite(x1,y1,@udg01)   pause 1   loop do:loop udg01: asm defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %11111111 defb %11111111 defb %11111111 defb %11111111 defb %11111111 defb %11111111 defb %11111111 defb %11111111 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %01111111 defb %01111111 defb %01111111 defb %01111111 defb %01111111 defb %01111111 defb %01111111 defb %01111111 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %10000000 defb %10000000 defb %10000000 defb %10000000 defb %10000000 defb %10000000 defb %10000000 defb %10000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00111111 defb %00111111 defb %00111111 defb %00111111 defb %00111111 defb %00111111 defb %00111111 defb %00111111 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %11000000 defb %11000000 defb %11000000 defb %11000000 defb %11000000 defb %11000000 defb %11000000 defb %11000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00011111 defb %00011111 defb %00011111 defb %00011111 defb %00011111 defb %00011111 defb %00011111 defb %00011111 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %11100000 defb %11100000 defb %11100000 defb %11100000 defb %11100000 defb %11100000 defb %11100000 defb %11100000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00001111 defb %00001111 defb %00001111 defb %00001111 defb %00001111 defb %00001111 defb %00001111 defb %00001111 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %11110000 defb %11110000 defb %11110000 defb %11110000 defb %11110000 defb %11110000 defb %11110000 defb %11110000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000111 defb %00000111 defb %00000111 defb %00000111 defb %00000111 defb %00000111 defb %00000111 defb %00000111 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %11111000 defb %11111000 defb %11111000 defb %11111000 defb %11111000 defb %11111000 defb %11111000 defb %11111000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000011 defb %00000011 defb %00000011 defb %00000011 defb %00000011 defb %00000011 defb %00000011 defb %00000011 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %11111100 defb %11111100 defb %11111100 defb %11111100 defb %11111100 defb %11111100 defb %11111100 defb %11111100 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000001 defb %00000001 defb %00000001 defb %00000001 defb %00000001 defb %00000001 defb %00000001 defb %00000001 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %11111110 defb %11111110 defb %11111110 defb %11111110 defb %11111110 defb %11111110 defb %11111110 defb %11111110 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 defb %00000000 end asm

so, any idea of using "true" sprites instead of that attempt above?

Well this is the first approach, and some people has managed to optimize that code and make complete games!
That said, you can use PutChar (a routine which is much faster than print, but only focused in putting a char):
https://zxbasic.readthedocs.io/en/docs/l...chars.bas/

There are other many libraries (some of them bundled with ZX Basic compiler, like FourSpriter) (for 2x2 Cells sprites like your example):
https://zxbasic.readthedocs.io/en/docs/t...er-spanish

And finally the MOST advaced ones are Nirvana Engine
https://spectrumcomputing.co.uk/entry/30...ANA_ENGINE

and Dr Gusman sprite library (this last one, my favourite)
https://github.com/gusmanb/GuSprites
He also created an editor!
https://github.com/gusmanb/ResourceDesigner

Note: Nirvana and Nirvana+ engines are VERY ADVANCED and I don't provide support for them (search in this forum or contact Einar Saukas, the main author).