mirror of
https://github.com/lalbornoz/roar.git
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127 lines
2.0 KiB
Plaintext
127 lines
2.0 KiB
Plaintext
BRUSH SHADERS
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=============
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Unless noted, these shaders were written to work on the brush itself.
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Make sure "brush" is selected and "animate" is checked.
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>> distressed texture brush
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Sample use of the "choice" function to get a random color.
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var char = choice(" abcdef ")
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lex.bg = +choice("0124")
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lex.fg = +choice("01234")
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lex.char = char
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lex.opacity = char == " " ? 0 : 1
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>> foggy terrain brush
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var char = choice(" abcdef ")
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lex.bg = choice([14,15])
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lex.fg = choice("367")
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lex.char = char
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lex.opacity = char == " " ? 0 : 1
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>> mirror brush (left-right)
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NOTE: Animate this on the canvas, then draw:
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if (x > w/2) {
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lex.assign( canvas.aa[y][w-x] )
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}
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>> mirror brush (up-down)
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NOTE: Animate this on the canvas, then draw:
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if (x > h/2) {
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lex.assign( canvas.aa[h-y][x] )
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}
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>> rainbow stardust brush
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Uncheck BG and animate this to brush:
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lex.fg = hue(t)
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lex.char = choice(" ,'.,.','****** ")
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>> noise brushes, works on a black background:
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lex.bg = max(5, yellow(randint(t)))
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lex.opacity = lex.bg == colors.black ? 0 : 1
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>> simple rainbow:
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if (lex.bg != 1) lex.bg = randint(t)
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lex.opacity = lex.bg == colors.black ? 0 : 1
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>> self-erasing:
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if (lex.bg != 1) lex.bg = yellow(randint(t))
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lex.opacity = lex.bg == colors.black ? 0 : 1
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>> cycling rainbow brush
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if (lex.bg != 1) lex.bg = hue( all_color_hue_order.indexOf( color_names[ lex.bg ] ) + 1 )
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lex.opacity = lex.bg == colors.black ? 0 : 1
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>> "stars" brush.. set your brush to paint just the character "#"
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if (lex.char == "#") {
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lex.fg = hue(randint(15))
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lex.char = random() > 0.1 ? " " : "+@*.,\"+'*-"[randint(10)]
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}
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>> use fg char to mask mask what you're drawing on the bg
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if (lex.char != "/") { lex.bg = 1 }
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>> sharded glitch brush
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Example: http://asdf.us/z/kksnvs.png
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Use on a brush:
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lex.bg = t/y/x
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lex.opacity = lex.bg % 1 ? 0 : 1
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>> incremental brush
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Set your brush to be the ^ character, square, about 10x10
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Draw "char" only
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Then animate this shader on the canvas:
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if (lex.char=="^") {
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lex.bg += 1
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lex.char = " "
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}
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lex.bg += 1
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