Created
March 15, 2022 21:02
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Quick code to make turmites in R
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| .cursor <- R6::R6Class( | |
| "cursor", | |
| list( | |
| x = 0, | |
| y = 0, | |
| direction = 0, | |
| left = function() { | |
| self$direction <- self$direction + 270 | |
| invisible(self) | |
| }, | |
| right = function() { | |
| self$direction <- self$direction + 90 | |
| invisible(self) | |
| }, | |
| none = function() { | |
| self$direction <- self$direction | |
| invisible(self) | |
| }, | |
| turn = function() { | |
| self$direction <- self$direction + 180 | |
| invisible(self) | |
| }, | |
| advance = function() { | |
| switch( | |
| sample(1:4, 1), | |
| self$left(), | |
| self$right(), | |
| self$none(), | |
| self$turn() | |
| ) | |
| if (self$direction >= 360) self$direction <- self$direction %% 360 | |
| if (self$direction == 0) { | |
| self$y <- self$y + 1 | |
| } else if (self$direction == 90) { | |
| self$x <- self$x + 1 | |
| } else if (self$direction == 180) { | |
| self$y <- self$y - 1 | |
| } else { | |
| self$x <- self$x - 1 | |
| } | |
| invisible(self) | |
| }, | |
| execute = function(n_steps = 1000) { | |
| output <- setNames( | |
| data.frame(matrix(nrow = n_steps, ncol = 2)), | |
| c("x", "y") | |
| ) | |
| for (i in seq_len(n_steps)) { | |
| self$advance() | |
| output[i, ]$x <- self$x | |
| output[i, ]$y <- self$y | |
| } | |
| output | |
| } | |
| ) | |
| ) | |
| make_turmite <- function(n_steps = 1000, | |
| color = sample(grDevices::colors(), 1)) { | |
| cursor <- .cursor$new() | |
| turmite <- dplyr::mutate( | |
| dplyr::count( | |
| cursor$execute(n_steps), | |
| x, | |
| y, | |
| name = "z"), | |
| z = z %% 2) | |
| ggplot2::ggplot(turmite, ggplot2::aes(x, y, fill = factor(z))) + | |
| ggplot2::geom_raster() + | |
| ggplot2::scale_fill_manual(values = c("white", color)) + | |
| ggplot2::theme_void() + | |
| ggplot2::theme(legend.position = "none", | |
| panel.background = ggplot2::element_rect(fill = "white")) | |
| } |
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