Sha256: cbf20691717488be9cd8271c1f0aeab1fe8019baf883e20de2dcce4bdf3eabd8
Contents?: true
Size: 979 Bytes
Versions: 7
Compression:
Stored size: 979 Bytes
Contents
# The Nature of Code
# Daniel Shiffman
# http://natureofcode.com
# Example demonstrating distance joints
# A bridge is formed by connected a series of particles with joints
require 'pbox2d'
require 'forwardable'
require_relative 'boundary'
require_relative 'pair'
require_relative 'particle'
require_relative 'particle_system'
attr_reader :box2d, :boundaries, :system
def settings
size(640, 360)
end
def setup
# Initialize box2d physics and create the world
@box2d = WorldBuilder.build(app: self)
@system = ParticleSystem.new
@boundaries = []
# Add a bunch of fixed boundaries
boundaries << Boundary.new(width / 4, height - 5, width / 2 - 50, 10)
boundaries << Boundary.new(3 * width / 4, height - 50, width / 2 - 50, 10)
end
def draw
background(255)
system.run
# Display all the boundaries
boundaries.each(&:display)
fill(0)
text('Click mouse to add connected particles.', 10, 20)
end
def mouse_pressed
system.add_pair(mouse_x, mouse_y)
end
Version data entries
7 entries across 7 versions & 1 rubygems