asciiblaster

- draw irc art in your web browser
git clone git://git.acid.vegas/asciiblaster.git
brush.txt (2084B)
      1 BRUSH SHADERS
      2 =============
      3 
      4 Unless noted, these shaders were written to work on the brush itself.
      5 Make sure "brush" is selected and "animate" is checked.
      6 
      7 
      8 >> distressed texture brush
      9 
     10 Sample use of the "choice" function to get a random color.
     11 
     12 var char = choice("      abcdef      ")
     13 lex.bg = +choice("0124")
     14 lex.fg = +choice("01234")
     15 lex.char = char
     16 lex.opacity = char == " " ? 0 : 1
     17 
     18 
     19 
     20 >> foggy terrain brush
     21 
     22 var char = choice("      abcdef      ")
     23 lex.bg = choice([14,15])
     24 lex.fg = choice("367")
     25 lex.char = char
     26 lex.opacity = char == " " ? 0 : 1
     27 
     28 
     29 
     30 >> mirror brush (left-right)
     31 
     32 NOTE: Animate this on the canvas, then draw:
     33 
     34 if (x > w/2) {
     35   lex.assign( canvas.aa[y][w-x] )
     36 }
     37 
     38 
     39 
     40 >> mirror brush (up-down)
     41 
     42 NOTE: Animate this on the canvas, then draw:
     43 
     44 if (x > h/2) {
     45   lex.assign( canvas.aa[h-y][x] )
     46 }
     47 
     48 
     49 
     50 >> rainbow stardust brush
     51 
     52 Uncheck BG and animate this to brush:
     53 
     54 lex.fg = hue(t)
     55 lex.char = choice("            ,'.,.','******    ")
     56 
     57 
     58 
     59 >> noise brushes, works on a black background:
     60 
     61 lex.bg = max(5, yellow(randint(t)))
     62 lex.opacity = lex.bg == colors.black ? 0 : 1
     63 
     64 
     65 
     66 >> simple rainbow:
     67 
     68 if (lex.bg != 1) lex.bg = randint(t)
     69 lex.opacity = lex.bg == colors.black ? 0 : 1
     70 
     71 
     72 
     73 >> self-erasing:
     74 
     75 if (lex.bg != 1) lex.bg = yellow(randint(t))
     76 lex.opacity = lex.bg == colors.black ? 0 : 1
     77 
     78 
     79 
     80 >> cycling rainbow brush
     81 
     82 if (lex.bg != 1) lex.bg = hue( all_color_hue_order.indexOf( color_names[ lex.bg ] ) + 1 )
     83 lex.opacity = lex.bg == colors.black ? 0 : 1
     84 
     85 
     86 
     87 >> "stars" brush.. set your brush to paint just the character "#"
     88 
     89 if (lex.char == "#") {
     90   lex.fg = hue(randint(15))
     91   lex.char = random() > 0.1 ? " " : "+@*.,\"+'*-"[randint(10)]
     92 }
     93 
     94 
     95 
     96 >> use fg char to mask mask what you're drawing on the bg
     97 
     98 if (lex.char != "/") { lex.bg = 1 }
     99 
    100 
    101 
    102 >> sharded glitch brush
    103 
    104 Example: http://asdf.us/z/kksnvs.png 
    105 
    106 Use on a brush:
    107 
    108 lex.bg = t/y/x
    109 lex.opacity = lex.bg % 1 ? 0 : 1
    110 
    111 
    112 
    113 >> incremental brush
    114 
    115 Set your brush to be the ^ character, square, about 10x10
    116 Draw "char" only
    117 Then animate this shader on the canvas:
    118 
    119 if (lex.char=="^") {
    120   lex.bg += 1
    121   lex.char = " "
    122 }
    123 lex.bg += 1
    124 
    125 
    126