類別 IRB::RubyModel
公開類別方法
new() 按一下以切換來源
# File lib/irb/easter-egg.rb, line 63 def initialize @faces = init_ruby_model end
公開實例方法
init_ruby_model() 按一下以切換來源
# File lib/irb/easter-egg.rb, line 67 def init_ruby_model cap_vertices = (0..5).map {|i| Vec.new(*Complex.polar(1, i * Math::PI / 3).rect, 1) } middle_vertices = (0..5).map {|i| Vec.new(*Complex.polar(2, (i + 0.5) * Math::PI / 3).rect, 0) } bottom_vertex = Vec.new(0, 0, -2) faces = [cap_vertices] 6.times do |j| i = j-1 faces << [cap_vertices[i], middle_vertices[i], cap_vertices[j]] faces << [cap_vertices[j], middle_vertices[i], middle_vertices[j]] faces << [middle_vertices[i], bottom_vertex, middle_vertices[j]] end faces end
render_frame(i) { |p1, p2| ... } 按一下以切換來源
# File lib/irb/easter-egg.rb, line 83 def render_frame(i) angle = i / 10.0 dir = Vec.new(*Complex.polar(1, angle).rect, Math.sin(angle)).normalize dir2 = Vec.new(*Complex.polar(1, angle - Math::PI/2).rect, 0) up = dir.cross(dir2) nm = dir.cross(up) @faces.each do |vertices| v0, v1, v2, = vertices if v1.sub(v0).cross(v2.sub(v0)).dot(dir) > 0 points = vertices.map {|p| [nm.dot(p), up.dot(p)] } (points + [points[0]]).each_cons(2) do |p1, p2| yield p1, p2 end end end end