Create a reusable tweaked brush specification
See also
Other brush management:
brush_dirs(),
brush_inputs(),
brush_settings(),
brushes(),
load_brush(),
set_brush()
Examples
if ("classic/pen" %in% brushes()) {
tweak_brush("classic/pen", normalize = "tracking", radius_logarithmic = log(1.2))
}
#> $json
#> [1] "{\n \"comment\": \"MyPaint brush file\", \n \"description\": \"\", \n \"group\": \"\", \n \"notes\": \"\", \n \"parent_brush_name\": \"classic/pen\", \n \"settings\": {\n \"anti_aliasing\": {\n \"base_value\": 1.0, \n \"inputs\": {}\n }, \n \"change_color_h\": {\n \"base_value\": 0.0, \n \"inputs\": {}\n }, \n \"change_color_hsl_s\": {\n \"base_value\": 0.0, \n \"inputs\": {}\n }, \n \"change_color_hsv_s\": {\n \"base_value\": 0.0, \n \"inputs\": {}\n }, \n \"change_color_l\": {\n \"base_value\": 0.0, \n \"inputs\": {}\n }, \n \"change_color_v\": {\n \"base_value\": 0.0, \n \"inputs\": {}\n }, \n \"color_h\": {\n \"base_value\": 0.0, \n \"inputs\": {}\n }, \n \"color_s\": {\n \"base_value\": 0.0, \n \"inputs\": {}\n }, \n \"color_v\": {\n \"base_value\": 0.0, \n \"inputs\": {}\n }, \n \"colorize\": {\n \"base_value\": 0.0, \n \"inputs\": {}\n }, \n \"custom_input\": {\n \"base_value\": 0.0, \n \"inputs\": {}\n }, \n \"custom_input_slowness\": {\n \"base_value\": 0.0, \n \"inputs\": {}\n }, \n \"dabs_per_actual_radius\": {\n \"base_value\": 2.2, \n \"inputs\": {}\n }, \n \"dabs_per_basic_radius\": {\n \"base_value\": 0.0, \n \"inputs\": {}\n }, \n \"dabs_per_second\": {\n \"base_value\": 0.0, \n \"inputs\": {}\n }, \n \"direction_filter\": {\n \"base_value\": 2.0, \n \"inputs\": {}\n }, \n \"elliptical_dab_angle\": {\n \"base_value\": 90.0, \n \"inputs\": {}\n }, \n \"elliptical_dab_ratio\": {\n \"base_value\": 1.0, \n \"inputs\": {}\n }, \n \"eraser\": {\n \"base_value\": 0.0, \n \"inputs\": {}\n }, \n \"hardness\": {\n \"base_value\": 0.9, \n \"inputs\": {\n \"pressure\": [\n [\n 0.0, \n 0.0\n ], \n [\n 1.0, \n 0.05\n ]\n ], \n \"speed1\": [\n [\n 0.0, \n -0.0\n ], \n [\n 1.0, \n -0.09\n ]\n ]\n }\n }, \n \"lock_alpha\": {\n \"base_value\": 0.0, \n \"inputs\": {}\n }, \n \"offset_by_random\": {\n \"base_value\": 0.0, \n \"inputs\": {}\n }, \n \"offset_by_speed\": {\n \"base_value\": 0.0, \n \"inputs\": {}\n }, \n \"offset_by_speed_slowness\": {\n \"base_value\": 1.0, \n \"inputs\": {}\n }, \n \"opaque\": {\n \"base_value\": 1.0, \n \"inputs\": {}\n }, \n \"opaque_linearize\": {\n \"base_value\": 0.9, \n \"inputs\": {}\n }, \n \"opaque_multiply\": {\n \"base_value\": 0.0, \n \"inputs\": {\n \"pressure\": [\n [\n 0.0, \n 0.0\n ], \n [\n 0.015, \n 0.0\n ], \n [\n 0.015, \n 1.0\n ], \n [\n 1.0, \n 1.0\n ]\n ]\n }\n }, \n \"pressure_gain_log\": {\n \"base_value\": 0.0, \n \"inputs\": {}\n }, \n \"radius_by_random\": {\n \"base_value\": 0.0, \n \"inputs\": {}\n }, \n \"radius_logarithmic\": {\n \"base_value\": 0.96, \n \"inputs\": {\n \"pressure\": [\n [\n 0.0, \n 0.0\n ], \n [\n 1.0, \n 0.5\n ]\n ], \n \"speed1\": [\n [\n 0.0, \n -0.0\n ], \n [\n 1.0, \n -0.15\n ]\n ]\n }\n }, \n \"restore_color\": {\n \"base_value\": 0.0, \n \"inputs\": {}\n }, \n \"slow_tracking\": {\n \"base_value\": 0.65, \n \"inputs\": {}\n }, \n \"slow_tracking_per_dab\": {\n \"base_value\": 0.8, \n \"inputs\": {}\n }, \n \"smudge\": {\n \"base_value\": 0.0, \n \"inputs\": {}\n }, \n \"smudge_length\": {\n \"base_value\": 0.5, \n \"inputs\": {}\n }, \n \"smudge_radius_log\": {\n \"base_value\": 0.0, \n \"inputs\": {}\n }, \n \"snap_to_pixel\": {\n \"base_value\": 0.0, \n \"inputs\": {}\n }, \n \"speed1_gamma\": {\n \"base_value\": 2.87, \n \"inputs\": {}\n }, \n \"speed1_slowness\": {\n \"base_value\": 0.04, \n \"inputs\": {}\n }, \n \"speed2_gamma\": {\n \"base_value\": 4.0, \n \"inputs\": {}\n }, \n \"speed2_slowness\": {\n \"base_value\": 0.8, \n \"inputs\": {}\n }, \n \"stroke_duration_logarithmic\": {\n \"base_value\": 4.0, \n \"inputs\": {}\n }, \n \"stroke_holdtime\": {\n \"base_value\": 0.0, \n \"inputs\": {}\n }, \n \"stroke_threshold\": {\n \"base_value\": 0.0, \n \"inputs\": {}\n }, \n \"tracking_noise\": {\n \"base_value\": 0.0, \n \"inputs\": {}\n }\n }, \n \"version\": 3\n}"
#>
#> $settings
#> slow_tracking slow_tracking_per_dab radius_logarithmic
#> 0.0000000 0.0000000 0.1823216
#>
#> $source
#> [1] "/usr/local/lib/R/site-library/mypaintr/brushes/classic/pen.myb"
#>
#> $normalize
#> [1] "tracking"
#>
#> attr(,"class")
#> [1] "mypaintr_brush"