mapcompress

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mapcompress

by jo560hs

Cart #mapcompress-2 | 2022-02-27 | Code ▽ | Embed ▽ | License: CC4-BY-NC-SA

4

notice:

1. currently you cant use sprite flags to draw certain sprites
2. camera won't work with this, use sx and sy
3. you cant choose the width/height of the map area you want to draw

map code (put this in your game instead of map()):

first version:

mapcompress

by jo560hs

Cart #mapcompress-0 | 2020-11-20 | Code ▽ | Embed ▽ | License: CC4-BY-NC-SA

4

Copy and paste the snippet below into your HTML.

<iframe src="https://www.lexaloffle.com/bbs/widget.php?pid=mapcompress" allowfullscreen width="621" height="513" style="border:none; overflow:hidden"></iframe>

so you know how half of the sprite sheet is shared with the map? because of that, usually I use the half for the map, one spritesheet tab for sprites, and one tab for map tiles. well, I just figured out that in doing so I dont use 1/4th of the tile data. this program I made uses the 1/4th tile data to flip the map tile. i will be making a tool to use this easily soon.

Code to import:

function _map(x,y,sx,sy,celw,celh,layer) local x=x local y=y local celw=celw local celh=celh local layer=layer --not used yet if x==nil then x=0 end if y==nil then y=0 end local sx=x local sy=y if celw==nil then celw=16 end if celh==nil then celh=16 end for i=0,celw*celh do tile=mget(x,y) if tile<64 then --first tab flipx=false flipy=false tile+=64 elseif tile>63 and tile<128 then --second tab flipx=true flipy=false elseif tile>127 and tile<192 then --third tab flipx=false flipy=true tile-=64 else --fourth tab flipx=true flipy=true tile-=128 end spr(tile,x*8,y*8,1,1,flipx,flipy) x+=1 if x==sx+16 then x=0 y+=1 end end end

The code uses the 2nd spritesheet tab for the tiles.
Call _map() whenever you want to use the function in your game.

You have overwritten the sx and sy parameters in your code, so this is ignored.
Why do you call "local x=x"? Parameters are normally already local. Variables in for normally too.

I have shorted your _map-routine a little bit:

function _map(x,y,sx,sy,celw,celh,layer)
 sx=sx or 0
 sy=sy or 0
 for y=0,celh or 16 do
   for x=0,celw or 16 do     
        local tile=mget(x,y)
        spr((tile & 63) + 64,
            sx+x*8,sy+y*8,1,1,
            (63 < tile and tile <128) or tile>=192,
            tile>127)
      end
    end 
end

when you have questions about my code ask :)

amogus
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