hmm

Author: monkstone

demo/menger.rb

@@ -0,0 +1,124 @@
+# frozen_string_literal: true
+require 'picrate'
+require 'arcball'
+
+##########################
+# RetainedMenger.rb
+# (processing-3.0)
+# author Martin Prout
+##########################
+class RetainedMenger < Processing::App
+
+  PTS = 3
+  MIN_SIZE = 20
+
+  attr_reader :menger
+
+  def setup
+    sketch_title 'Retained Menger'
+    Processing::ArcBall.init(self)
+    @menger = create_shape(GROUP)
+    create_menger(0, 0, 0, height * 0.8)
+  end
+
+  def draw
+    background(20, 20, 200)
+    no_stroke
+    lights
+    define_lights
+    render
+  end
+
+  def render
+    menger.set_fill(color(224, 223, 219))
+    menger.set_ambient(50)
+    menger.set_specular(150)
+    shape(menger)
+  end
+
+  def create_menger(xx, yy, zz, sz)
+    u = sz / 3.0
+    if sz < MIN_SIZE # recursion limited by minimum cube size
+      no_stroke
+      menger.add_child(create_cube(xx, yy, zz, sz)) # create and add a cube
+    else
+      mesh_grid(PTS, PTS, PTS) do |x, y, z|
+        i = x - 1
+        j = y - 1
+        k = z - 1
+        if (i.abs + j.abs + k.abs) > 1
+          create_menger(xx + (i * u), yy + (j * u), zz + (k * u), u)
+        end
+      end
+    end
+  end
+
+  def create_cube(xx, yy, zz, sz)
+    dim = sz / 2.0
+    cube = create_shape
+    cube.begin_shape(QUADS)
+    # Front face
+    cube.fill(255)
+    cube.normal(0, 0, 1)
+    cube.vertex(-dim + xx, -dim + yy, -dim + zz)
+    cube.vertex(+dim + xx, -dim + yy, -dim + zz)
+    cube.vertex(+dim + xx, +dim + yy, -dim + zz)
+    cube.vertex(-dim + xx, +dim + yy, -dim + zz)
+
+    # Back face
+
+    cube.normal(0, 0, -1)
+    cube.vertex(-dim + xx, -dim + yy, +dim + zz)
+    cube.vertex(+dim + xx, -dim + yy, +dim + zz)
+    cube.vertex(+dim + xx, +dim + yy, +dim + zz)
+    cube.vertex(-dim + xx, +dim + yy, +dim + zz)
+
+    # Left face
+
+    cube.normal(1, 0, 0)
+    cube.vertex(-dim + xx, -dim + yy, -dim + zz)
+    cube.vertex(-dim + xx, -dim + yy, +dim + zz)
+    cube.vertex(-dim + xx, +dim + yy, +dim + zz)
+    cube.vertex(-dim + xx, +dim + yy, -dim + zz)
+
+    # Right face
+
+    cube.normal(-1, 0, 0)
+    cube.vertex(+dim + xx, -dim + yy, -dim + zz)
+    cube.vertex(+dim + xx, -dim + yy, +dim + zz)
+    cube.vertex(+dim + xx, +dim + yy, +dim + zz)
+    cube.vertex(+dim + xx, +dim + yy, -dim + zz)
+
+    # Top face
+
+    cube.normal(0, 1, 0)
+    cube.vertex(-dim + xx, -dim + yy, -dim + zz)
+    cube.vertex(+dim + xx, -dim + yy, -dim + zz)
+    cube.vertex(+dim + xx, -dim + yy, +dim + zz)
+    cube.vertex(-dim + xx, -dim + yy, +dim + zz)
+
+    # Bottom face
+
+    cube.normal(0, -1, 0)
+    cube.vertex(-dim + xx, +dim + yy, -dim + zz)
+    cube.vertex(+dim + xx, +dim + yy, -dim + zz)
+    cube.vertex(+dim + xx, +dim + yy, +dim + zz)
+    cube.vertex(-dim + xx, +dim + yy, +dim + zz)
+    cube.end_shape
+    cube
+  end
+
+  def define_lights
+    ambient_light(180, 180, 180)
+    point_light(30, 30, 30, 200, 240, 0)
+    directional_light(50, 50, 50, 1, 0, 0)
+    spot_light(30, 30, 30, 0, 40, 200, 0, -0.5, -0.5, PI / 2, 2)
+  end
+
+  def settings
+    size(640, 480, P3D)
+    smooth(8)
+  end
+end
+
+RetainedMenger.new

external_library/java/grafica/exponential_trend.rb

@@ -23,7 +23,6 @@ def setup
     # Prepare the points for the plot
     @points = GPointsArray.new(N_POINTS)
     @plot = GPlot.new(self)
-    puts plot.inspect
     @log_scale = false
     N_POINTS.times do
       x_value = rand(10..200)