eq_triangle_maze {mazealls} | R Documentation |
eq_triangle_maze .
Description
Recursively draw an equilateral triangle maze, with sides consisting
of pieces of length
unit_len
.
Usage
eq_triangle_maze(depth, unit_len, clockwise = TRUE,
method = c("stack_trapezoids", "triangles", "uniform", "two_ears", "random",
"hex_and_three", "shave_all", "shave"), start_from = c("midpoint",
"corner"), boustro = c(1, 1), draw_boundary = FALSE,
num_boundary_holes = 2, boundary_lines = TRUE, boundary_holes = NULL,
boundary_hole_color = NULL, boundary_hole_locations = NULL,
boundary_hole_arrows = FALSE, end_side = 1)
Arguments
depth |
the depth of recursion. This controls the side length. |
unit_len |
the unit length in graph coordinates. This controls the width of the ‘holes’ in the boundary lines and generally controls the spacing of mazes. |
clockwise |
whether to draw clockwise. |
method |
there are many ways to recursive draw a triangle. The following values are acceptable:
|
start_from |
whether to start from the midpoint of the first side of a maze, or from the corner facing the first side. |
boustro |
an array of two values, which help determine
the location of holes in internal lines of length
|
draw_boundary |
a boolean indicating whether a final boundary shall be drawn around the maze. |
num_boundary_holes |
the number of boundary sides which should be
randomly selected to have holes. Note that the |
boundary_lines |
indicates which of the sides of the maze shall have drawn boundary lines. Can be a logical array indicating which sides shall have lines, or a numeric array, giving the index of sides that shall have lines. |
boundary_holes |
an array indicating which of the boundary lines
have holes. If |
boundary_hole_color |
the color of boundary holes. A value of
|
boundary_hole_locations |
the ‘locations’ of the boundary holes
within each boundary segment.
A value of |
boundary_hole_arrows |
a boolean or boolean array indicating whether to draw perpendicular double arrows at the boundary holes, as a visual guide. These can be useful for locating the entry and exit points of a maze. |
end_side |
the number of the side to end on. A value of
1 corresponds to the starting side, while higher numbers
correspond to the drawn side of the figure in the canonical order
(that is, the order induced by the |
Details
Draws a maze in an equilateral triangle, starting from the midpoint
of the first side (or the corner before the first side via the
start_from
option). A number of different recursive methods
are supported, dividing the triangle into sub-triangles, or hexagons,
parallelogram and triangles, and so on. Optionally draws boundaries
around the triangle, with control over which sides have lines and
holes. Side length of triangles consists of segments
of length
unit_len
, though depth
may be non-integral.
A number of different methods are supported.
For method='uniform'
:
For method='triangles'
:
For method='two_ears'
:
For method='hex_and_three'
:
For method='shave'
:
For method='shave_all'
:
Value
nothing; the function is called for side effects only, though in the future this might return information about the drawn boundary of the shape.
Author(s)
Steven E. Pav shabbychef@gmail.com
Examples
library(TurtleGraphics)
turtle_init(2500,2500)
turtle_hide()
turtle_up()
turtle_do({
turtle_left(90)
turtle_forward(40)
turtle_right(90)
eq_triangle_maze(depth=3,12,clockwise=FALSE,method='two_ears',draw_boundary=TRUE)
})
turtle_init(2500,2500)
turtle_hide()
turtle_up()
turtle_do({
turtle_left(90)
turtle_forward(40)
turtle_right(90)
eq_triangle_maze(depth=3,12,clockwise=FALSE,method='random',draw_boundary=TRUE)
})
# join two together, with green holes on opposite sides
turtle_init(2500,2500)
turtle_hide()
turtle_up()
turtle_do({
turtle_left(90)
turtle_forward(40)
turtle_right(90)
eq_triangle_maze(depth=3,12,clockwise=TRUE,method='two_ears',draw_boundary=TRUE,
boundary_holes=c(1,3),boundary_hole_color=c('clear','clear','green'))
eq_triangle_maze(depth=3,12,clockwise=FALSE,method='uniform',draw_boundary=TRUE,
boundary_lines=c(2,3),boundary_holes=c(2),boundary_hole_color='green')
})
# non integral depths also possible:
turtle_init(2500,2500)
turtle_hide()
turtle_up()
turtle_do({
turtle_left(90)
turtle_forward(40)
turtle_right(90)
eq_triangle_maze(depth=log2(27),12,clockwise=TRUE,method='hex_and_three',draw_boundary=TRUE,
boundary_holes=c(1,3),boundary_hole_color=c('clear','clear','green'))
eq_triangle_maze(depth=log2(27),12,clockwise=FALSE,method='shave',draw_boundary=TRUE,
boundary_lines=c(2,3),boundary_holes=c(2),boundary_hole_color='green')
})