Contents

# encoding: utf-8
# frozen_string_literal: true
# From the Processing Examples
# by Zach Lieberman

WORDS = %w(sometimes\ it's\ like the\ lines\ of\ text are\ so\ happy
           that\ they\ want\ to\ dance or\ leave\ the\ page\ or\ jump
           can\ you\ blame\ them? living\ on\ the\ page\ like\ that
           waiting\ to\ be\ read...)

require 'propane' # temporary local

# dispay them 'words'
class KineticType < Propane::App  
  
  def setup
    size(200, 200, P3D)
    frame_rate 30
    # Load the font from the sketch's data directory.
    text_font load_font(data_path('Univers45.vlw')), 1.0
    fill 255
    # Creating the line objects
    @lines = WORDS.map.with_index { |word, i| Line.new(self, word, 0, i * 70) }
  end
  
  def draw
    background 0
    translate(-240, -120, -450)
    rotate_y 0.3
    # Now animate every line object & draw it...
    @lines.each_with_index do |line, i|
      push_matrix
      translate 0.0, line.ypos, 0.0
      line.draw(i)
      pop_matrix
    end
  end
end


class Line
  attr_accessor :app, :string, :xpos, :ypos, :letters

  def initialize(app, string, x, y)
    @app, @string, @xpos, @ypos = app, string, x, y
    spacing = 0.0
    @letters = string.split('').map do |c|
      spacing += app.text_width(c)
      Letter.new(c, spacing, 0.0)
    end
  end

  def compute_curve(line_num)
    base = app.millis / 10_000.0 * Math::PI * 2
    Math.sin((line_num + 1.0) * base) * Math.sin((8.0 - line_num) * base)
  end

  def draw(line_num)
    curve = compute_curve(line_num)
    letters.each_with_index do |letter, i|
      return if i < 0
      app.translate(app.text_width(letters[i - 1].char) * 75, 0.0, 0.0)
      app.rotate_y(curve * 0.035)
      app.push_matrix
      app.scale(75.0, 75.0, 75.0)
      app.text(letter.char, 0.0, 0.0)
      app.pop_matrix
    end
  end
end

class Letter
  attr_accessor :char, :x, :y
  def initialize(c, x, y)
    @char, @x, @y = c, x, y
  end
end

KineticType.new title: 'Kinetic Type'

Version data entries

5 entries across 5 versions & 1 rubygems

Version	Path
propane-0.7.0-java	examples/complete/kinetic_type.rb
propane-0.6.0-java	examples/complete/kinetic_type.rb
propane-0.5.0-java	examples/complete/kinetic_type.rb
propane-0.4.0.pre-java	examples/complete/kinetic_type.rb
propane-0.3.0.pre-java	examples/complete/kinetic_type.rb