Hilbert curve: Difference between revisions
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Implemented as a Lindenmayer System, depends on JRuby or JRubyComplete |
Implemented as a Lindenmayer System, depends on JRuby or JRubyComplete |
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<lang Ruby> |
<lang Ruby> |
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# frozen_string_literal: true |
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attr_reader :hilbert |
attr_reader :hilbert |
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def settings |
def settings |
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end |
end |
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Turtle = Struct.new(:x, :y, :theta) |
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# Hilbert Class has access to Sketch methods eg :line, :width, :height |
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class Hilbert |
class Hilbert |
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include Processing::Proxy |
include Processing::Proxy |
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attr_reader :grammar, :axiom, :draw_length, :production, :turtle |
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DELTA = |
DELTA = 90.radians |
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XPOS = 0 # placeholders for turtle |
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YPOS = 1 |
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THETA = 2 |
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def initialize |
def initialize |
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@axiom = 'FL' |
@axiom = 'FL' |
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stroke 0, 255, 0 |
stroke 0, 255, 0 |
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stroke_weight 2 |
stroke_weight 2 |
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@turtle = |
@turtle = Turtle.new(width / 9, height / 9, 0) |
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turtle[XPOS] = width / 9 |
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turtle[YPOS] = height / 9 |
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turtle[THETA] = 0 |
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end |
end |
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draw_line(turtle) |
draw_line(turtle) |
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when '+' |
when '+' |
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turtle.theta += DELTA |
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when '-' |
when '-' |
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turtle.theta -= DELTA |
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when 'L' |
when 'L' |
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when 'R' |
when 'R' |
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def draw_line(turtle) |
def draw_line(turtle) |
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x_temp = turtle |
x_temp = turtle.x |
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y_temp = turtle |
y_temp = turtle.y |
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turtle.x += draw_length * Math.cos(turtle.theta) |
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turtle.y += draw_length * Math.sin(turtle.theta) |
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line(x_temp, y_temp, turtle |
line(x_temp, y_temp, turtle.x, turtle.y) |
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end |
end |
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############################## |
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# create grammar from axiom and |
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# rules (adjust scale) |
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############################## |
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def create_grammar(gen) |
def create_grammar(gen) |
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