Update some noise examples

Author: monkstone

basics/math/noise4_tap.rb

@@ -0,0 +1,86 @@
+#!/usr/bin/env jruby
+require 'picrate'
+
+Coord = Struct.new(:mx, :my, :mz, :az, :al)
+
+class ForD < Processing::App
+  attr_reader :half_w, :half_h, :radius, :spin_x, :spin, :coords
+
+  def settings
+    size(480, 480, P3D)
+  end
+
+  def setup
+    sketch_title '4D Simplex Noise Test'
+    background(0)
+    stroke(255)
+    fill(32, 255, 64)
+    @half_w = width * 0.5
+    @half_h = height * 0.5
+    @radius = height * 0.4
+    @spin_x = 0.0
+    @spin = 0.0
+
+    angle = ((1.0 + Math.sqrt(5)) / 2.0 - 1) * TWO_PI # Fibonacci distribution
+    @coords = (0..2_000).map do |i|
+      inc = Math.asin(i / 1_000.0 - 1.0) # inclination
+      az = angle * i # azimuth
+      # Too lazy to do this the right way... precalculating both the angles and the coordinates
+      Coord.new.tap do |coord|
+        push_matrix
+        rotate_y(az)
+        rotate_z(inc)
+        translate(radius, 0, 0)
+        coord.mx = model_x(0, 0, 0) * 0.007
+        coord.my = model_y(0, 0, 0) * 0.007
+        coord.mz = modelZ(0, 0, 0) * 0.007
+        coord.az = az
+        coord.al = inc
+        pop_matrix
+      end
+    end
+  end
+
+  def draw
+    background(0)
+    @spin -= (mouse_x - pmouse_x) * 0.0001 if mouse_pressed?
+    @spin_x += spin
+    @spin *= 0.98
+    push_matrix
+    translate(half_w, half_h, -0)
+    rotate_y(-spin_x)
+    coords.each do |ci|
+      push_matrix
+      rotate_y(ci.az)
+      rotate_z(ci.al)
+      translate(radius, 0, 0)
+      dst = (modelZ(0, 0, 0) + half_h) / 2 + 32
+      stroke(dst, dst * 0.5, dst * 0.25)
+      #  4D Simplex noise(x, y, z, time)
+      ang = noise(ci.mx, ci.my, ci.mz, frame_count * 0.007) * TWO_PI
+      rotate_x(ang)
+      line(0, 0, 0, 0, 15, 0)
+      translate(0, 15, 0)
+      rotate_x(-10)
+      line(0, 0, 0, 0, 4, 0)
+      rotate_x(20)
+      line(0, 0, 0, 0, 4, 0)
+      pop_matrix
+    end
+    pop_matrix
+  end
+
+  def mouse_pressed
+    mode = NoiseMode::OPEN_SMOOTH
+    sketch_title mode.description
+    noise_mode mode
+  end
+
+  def mouse_released
+    mode = NoiseMode::DEFAULT
+    sketch_title mode.description
+    noise_mode mode
+  end
+end
+
+ForD.new

basics/math/noise_1_d.rb

@@ -1,24 +1,40 @@
-# Noise1D. 
-# 
-# Using 1D Perlin Noise to assign location. 
+# frozen_string_literal: true
+require 'picrate'
 
-def setup
-  sketch_title 'Noise 1D'
-  @xoff = 0.0
-  @x_increment = 0.01  
-  background 0
-  no_stroke  
-end
+class Noise1D < Processing::App
 
-def draw  
-  fill 0, 10
-  rect 0, 0, width, height  
-  n = noise(@xoff) * width  
-  @xoff += @x_increment  
-  fill 200
-  ellipse n, height / 2, 64, 64  
-end
+  def setup
+    sketch_title 'Noise 1D'
+    @xoff = 360
+    @x_increment = 0.01
+    background 0
+    no_stroke
+  end
+
+  def draw
+    fill 0, 10
+    rect 0, 0, width, height
+    n = noise(@xoff) * width
+    @xoff += @x_increment
+    fill 200
+    ellipse n, height / 2, 64, 64
+  end
 
-def settings
-  size 640, 360
+  def mouse_pressed
+    mode = NoiseMode::OPEN_SMOOTH
+    sketch_title mode.description
+    noise_mode mode
+  end
+
+  def mouse_released
+    mode = NoiseMode::DEFAULT
+    sketch_title mode.description
+    noise_mode mode
+  end
+
+  def settings
+    size 640, 360
+  end
 end
+
+Noise1D.new

basics/math/noise_2_d.rb

@@ -16,8 +16,6 @@ def draw
     background 0
     load_pixels
     xoff = 0.0
-    detail = map1d(mouse_x, (0..width), (0.1..0.6))
-    noise_detail(8, detail)
     (0...width).each do |x|
       xoff += @increment
       yoff = 0.0
@@ -30,6 +28,18 @@ def draw
     update_pixels
   end
 
+  def mouse_pressed
+    mode = NoiseMode::OPEN_SMOOTH
+    sketch_title mode.description
+    noise_mode mode
+  end
+
+  def mouse_released
+    mode = NoiseMode::DEFAULT
+    sketch_title mode.description
+    noise_mode mode
+  end
+
   def settings
     size 640, 360
   end

basics/math/noise_3_d.rb

@@ -1,37 +1,49 @@
 # frozen_string_literal: true
 require 'picrate'
-# Noise3D. 
-# 
-# Using 3D noise to create simple animated texture. 
+# Noise3D.
+#
+# Using 3D noise to create simple animated texture.
 # Here, the third dimension ('z') is treated as time.
 class Noise3D < Processing::App
   attr_reader :increment, :z_increment
-  
+
   def setup
     sketch_title 'Noise 3D'
-    frame_rate 30    
+    frame_rate 30
     @increment = 0.01
     @zoff = 0.0
-    @z_increment = 0.02    
+    @z_increment = 0.02
   end
-  
-  def draw    
-    background 0  	
-    load_pixels  	
-    xoff = 0.0  	
-    (0...width).each do |x|  	    
+
+  def draw
+    background 0
+    load_pixels
+    xoff = 0.0
+    (0...width).each do |x|
       xoff += increment
-      yoff = 0.0  		
-      (0...height).each do |y|  		    
-        yoff += increment  			
-        bright = noise(xoff, yoff, @zoff) * 255  			
+      yoff = 0.0
+      (0...height).each do |y|
+        yoff += increment
+        bright = noise(xoff, yoff, @zoff) * 255
         pixels[x + y * width] = color(bright, bright, bright)
       end
-    end  	
-    update_pixels  	
-    @zoff += z_increment  	
+    end
+    update_pixels
+    @zoff += z_increment
+  end
+
+  def mouse_pressed
+    mode = NoiseMode::OPEN_SMOOTH
+    sketch_title mode.description
+    noise_mode mode
   end
-  
+
+  def mouse_released
+    mode = NoiseMode::DEFAULT
+    sketch_title mode.description
+    noise_mode mode
+  end
+
   def settings
     size 640, 360
   end

basics/math/noise_wave.rb

@@ -1,45 +1,58 @@
 # frozen_string_literal: true
 require 'picrate'
 # Noise Wave
-# by Daniel Shiffman.  
-# 
-# Using Perlin Noise to generate a wave-like pattern. 
+# by Daniel Shiffman.
+#
+# Using Perlin Noise to generate a wave-like pattern.
 class NoiseWave < Processing::App
 
-attr_reader :yoff         # 2nd dimension of perlin noise
+  attr_reader :yoff         # 2nd dimension of perlin noise
 
-def setup
-  sketch_title 'Noise Wave'
-  @yoff = 0.0        
-end
+  def setup
+    sketch_title 'Noise Wave'
+    @yoff = 0.0
+  end
 
-def draw
-  background(51)
-  fill(255)
-  # We are going to draw a polygon out of the wave points
-  begin_shape  
-  xoff = 0       # Option #1: 2D Noise
-  # xoff = yoff # Option #2: 1D Noise  
-  # Iterate over horizontal pixels
-  (0..width).step(10) do |x|
-    # Calculate a y value according to noise, map to 
-    y = map1d(noise(xoff, yoff), (0..1.0), (200..300)) # Option #1: 2D Noise
-    # y = map1d(noise(xoff), (0..1.0), (200..300))    # Option #2: 1D Noise    
-    # Set the vertex
-    vertex(x, y) 
-    # Increment x dimension for noise
-    xoff += 0.05
+  def draw
+    background(51)
+    fill(255)
+    # We are going to draw a polygon out of the wave points
+    begin_shape
+    xoff = 0       # Option #1: 2D Noise
+    # xoff = yoff # Option #2: 1D Noise
+    # Iterate over horizontal pixels
+    (0..width).step(10) do |x|
+      # Calculate a y value according to noise, map to
+      y = map1d(noise(xoff, yoff), (0..1.0), (200..300)) # Option #1: 2D Noise
+      # y = map1d(noise(xoff), (0..1.0), (200..300))    # Option #2: 1D Noise
+      # Set the vertex
+      vertex(x, y)
+      # Increment x dimension for noise
+      xoff += 0.05
+    end
+    # increment y dimension for noise
+    @yoff += 0.01
+    vertex(width, height)
+    vertex(0, height)
+    end_shape(CLOSE)
   end
-  # increment y dimension for noise
-  @yoff += 0.01
-  vertex(width, height)
-  vertex(0, height)
-  end_shape(CLOSE)
-end
 
-def settings
-  size(640, 360)
-end
+
+  def mouse_pressed
+    mode = NoiseMode::OPEN_SMOOTH
+    sketch_title mode.description
+    noise_mode mode
+  end
+
+  def mouse_released
+    mode = NoiseMode::DEFAULT
+    sketch_title mode.description
+    noise_mode mode
+  end
+
+  def settings
+    size(640, 360)
+  end
 end
 
 NoiseWave.new

contributed/decagon_grid.rb

@@ -1,12 +1,11 @@
-# frozen_string_literal: true
+#!/usr/bin/env jruby
 
 require 'picrate'
 # Example of a grid of decagons with perlin noise after Lenny Herzog
 class DecagonGrid < Processing::App
-  load_library :pdf
   NOISE_STRENGTH = 80.0
   THETA = 36
-  attr_reader :version, :save, :noise_generator
+  attr_reader :version, :noise_generator
 
   def setup
     sketch_title 'Decagon Grid'
@@ -23,7 +22,6 @@ def setup
   end
 
   def draw
-    begin_record(PDF, data_path("Line_#{version}.pdf")) if save
     background(255)
     no_fill
     stroke(0)
@@ -40,15 +38,14 @@ def draw
       end
       end_shape(CLOSE)
     end
-    return unless save
+  end
 
-    end_record
-    @version += 1
-    @save = false
+  def mouse_pressed
+    noise_mode NoiseMode::OPEN_SMOOTH
   end
 
   def mouse_pressed
-    @save = true
+    noise_mode NoiseMode::DEFAULT
   end
 
   def settings