Branch Assignment
Contents
Reference
Lindenmayer system
Array
OpenGL
Logo
Code to Investigate
LogoTurtle
The provided class LogoTurtle is inspired by the Turtle Graphics in the [Logo] Programming Language created by Wally Feurzeig, Seymour Papert, and Cynthia Solomon.
class LogoTurtle attr_accessor :pen_color, :pen_width def initialize super @is_pen_down = true @pen_width = 0.005 @pen_color = Color::WHITE end def pen_up @is_pen_down = true end def pen_down @is_pen_down = false end def forward(amount) y = amount x = @pen_width if @is_pen_down glColor3f(@pen_color.red, @pen_color.green, @pen_color.blue) glBegin(GL_QUADS) glVertex2d(-x, 0.0) glVertex2d(-x, y) glVertex2d(x, y) glVertex2d(x, 0.0) glEnd() end glTranslatef(0,y,0) end def right(degrees) glRotatef(degrees, 0, 0, 1) end end
Flower Client
class Flower def initialize super @turtle = LogoTurtle.new end def render flower end private def square 4.times do @turtle.forward 0.5 @turtle.right 90 end end def flower 36.times do @turtle.right 10 square end end end
Code to Implement
Branch
file: | src/main/ruby/render/branch/branch.rb | ![]() |
class: | Branch | |
superclass: | Object | |
methods: | push_do_pop render |
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max_depth: 0 | max_depth: 1 | max_depth: 2 | max_depth: 3 | max_depth: 4 | max_depth: 5 |
push_do_pop
def push_do_pop raise :not_yet_implemented end
branch
def branch(length, line_width_in_pixels, depth_remaining) raise :not_yet_implemented end
Note: to produce the reference images the code below was used:
next_length = length * 0.5 next_line_width_in_pixels = line_width_in_pixels * 0.8
Note: the child branches in the reference images are one third and two thirds from the beginning to the end.
Note: the child branches in the reference images are rotated 30.0 degrees and -30.0 degrees.
Note: in the recursive case the child branches were drawn before the line at the current depth to allow the green to be beneath the brown.
Do NOT worry if your images are not exact matches of the reference images.
Run
file to run: | src/main/ruby/render/branch/branch.rb | ![]() |