Transparent Player for BareBones

cls()

function _init()
--we need a table to store what is transparent
transparent = {8,5,4,10,3,11}

--ignore beow two, they are just helpers to move
px = 60
py = 60
end


--outlining function
function ospr(sprite, x,y, outline_col, w, h) --use x and y where you want to draw normally, outline_col normally 0
 w=w or 1 --those two vars allow
 h=h or 1--for a multi-tiled sprites
 

--the function proper
 for i=0,15 do -- go through all the colors
   for j = 1,#transparent do -- go through everything in table of transparent colors
    
    --this is where magic happens
    --if color is in our transparent table
    if i==transparent[j] then
     palt(i,true) -- make it transparent
    else 
     pal(i,outline_col)  --changes this color to outline
    end
  end
 end

 --draw outline 
 spr(sprite, x-1,y, w, h) --draw the shadows 4x offsetting it by 1px (size of outline) do it 8x for better outline (with diagonals on x+/-size,y+/-size)
 spr(sprite, x,y-1, w, h)
 spr(sprite, x+1,y, w, h)
 spr(sprite, x,y+1, w, h)
 --now we just have a blob in color of outline
 
 pal() -- return palette to normal 
 pal(10,6) --this makes the yellow hands white
 
 make_transparent() -- make things inside our table transparent 
 spr(sprite, x,y, w,h) -- draw a sprite over those shadows
 pal() --and finally, return palette to normal again, for drawing the rest of sprites
end


--this makes any color inside
--transparent table, transparent
function make_transparent()
 
 --go through the transparent table
 for i = 1,#transparent do 
  --and make each color not show
  palt (transparent[i], true)
 end
 
end


function _update60()
rectfill(0,0,128,128,1)

 --call outline function
 --for player sprite
 ospr(1,px,py,0,2,2)
 
 
 --all the btn and btnp things are just for pico testing
 if btn(0) then px-=2 end
 if btn(1) then px+=2 end
 if btn(2) then py-=2 end
 if btn(3) then py+=2 end

 if btnp(4) then
  del(transparent, transparent[#transparent])
 end

end 
--
--during the game we just add
--or remove colors to/from
--transparent table depending
--on what body parts you have