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Diffstat (limited to 'doc/shaders/util.txt')
| -rw-r--r-- | doc/shaders/util.txt | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/doc/shaders/util.txt b/doc/shaders/util.txt new file mode 100644 index 0000000..d192652 --- /dev/null +++ b/doc/shaders/util.txt @@ -0,0 +1,25 @@ +SHADER UTILITIES +================ + +These are little snippets which may be useful in writing your own shaders. + + + +>> basic way to slow the frame rate of a shader. + +window.zz=window.zz||0 +if(!(x+y)) zz++ +if (lex.bg != 1 && !(zz % 4)) { + ... +} + + +>> handy for brushes - use color to mask brush shape + +lex.opacity = lex.bg == colors.black ? 0 : 1 + + +Tip: Set to "animate brush", then use option+shift (alt+shift) to +copy color from the canvas. Brush will have the "shape" of the +copied color only. Can be a cool effect when used with fg/bg only. + |