Examples demonstrating use of noise_mode.

Author: monkstone

CHANGELOG.md

@@ -1 +1,3 @@
+**3.0** Simplex Noise examples
+
 **v1.8** Update examples for hemesh-6.0.1, update pixelflow examples add more gui examples including skatolo

contributed/decagon_grid.rb

@@ -0,0 +1,58 @@
+#!/usr/bin/env jruby
+require 'propane'
+# Example of a grid of decagons with perlin noise after Lenny Herzog
+class DecagonGrid < Propane::App
+  load_library :pdf
+  NOISE_STRENGTH = 80.0
+  THETA = 36
+  attr_reader :version, :save, :noise_generator
+
+  def setup
+    sketch_title 'Decagon Grid'
+    frame_rate 24
+    @version = 0
+    @save = false
+    @noise_generator = lambda do |x, y, seed|
+      NOISE_STRENGTH * noise(
+        x / 150.0,
+        y / 150.0 + seed * 2,
+        seed
+      ) - 100
+    end
+  end
+
+  def draw
+    begin_record(PDF, data_path("Line_#{version}.pdf")) if save
+    background(255)
+    no_fill
+    stroke(0)
+    stroke_weight(1)
+    grid(height + 100, width + 100, 50, 50) do |cy, cx|
+      begin_shape
+      (0..360).step(THETA) do |angle|
+        x = (DegLut.cos(angle) * 60) + cx
+        y = (DegLut.sin(angle) * 60) + cy
+        noise_value = noise_generator.call(x, y, millis / 5_000.0)
+        x += noise_value
+        y += noise_value
+        vertex(x, y)
+      end
+      end_shape(CLOSE)
+    end
+    return unless save
+
+    end_record
+    @version += 1
+    @save = false
+  end
+
+  def mouse_pressed
+    @save = true
+  end
+
+  def settings
+    size(1000, 1000)
+  end
+end
+
+DecagonGrid.new

contributed/terrain.rb

@@ -8,7 +8,7 @@ def eql?(key)
     key.x == x
   end
 end
-# The propane sketch
+# The propane sketch press mouse to use SimpleNoise
 class Terrain < Propane::App
   WIDTH = 1400
   HEIGHT = 1100
@@ -43,7 +43,7 @@ def draw
     stroke 235, 69, 129
     translate width / 2, height / 2
     rotate_x PI / 3
-    translate(-WIDTH / 2, -HEIGHT / 2)    
+    translate(-WIDTH / 2, -HEIGHT / 2)
     (0...rows).each do |y|
       begin_shape(TRIANGLE_STRIP)
       (0..columns).each do |x|
@@ -54,6 +54,18 @@ def draw
     end
   end
 
+  def mouse_pressed
+    mode = Propane::SIMPLEX
+    noise_mode mode
+    sketch_title "#{mode}"
+  end
+
+  def mouse_released
+    mode = Propane::VALUE
+    noise_mode(mode)
+    sketch_title "#{mode}"
+  end
+
   private
 
   def renderer

external_library/gem/toxiclibs/geometry/circle_resolution.rb

@@ -0,0 +1,31 @@
+#!/usr/bin/env jruby -w
+require 'propane'
+require 'toxiclibs'
+java_import 'toxi.geom.Circle'
+
+class CircleResolution < Propane::App
+  attr_reader :gfx
+  def setup
+    sketch_title 'Circle Resolution'
+    @gfx = Gfx::ToxiclibsSupport.new(self)
+  end
+
+  def draw
+    background(0)
+    no_stroke
+    fill(255)
+    res = map1d(mouse_x, 0..width, 3..72)
+    poly = Circle.new(TVec2D.new(width / 2, height / 2), 200).toPolygon2D(res)
+    gfx.polygon2D(poly)
+    fill(255, 0, 0)
+    poly.each { |vertex| gfx.circle(vertex, 5) }
+    text(res, 20, 20)
+  end
+
+  def settings
+    size(600, 600)
+    smooth 8
+  end
+end
+
+CircleResolution.new

external_library/gem/toxiclibs/geometry/voronoi1.rb

@@ -21,7 +21,7 @@ def draw
     smooth
     stroke_weight 1
     stroke 255
-    voronoi.get_regions.each {  |polygon| gfx.polygon2D(polygon) }
+    voronoi.get_regions.each { |polygon| gfx.polygon2D(polygon) }
     save_frame(data_path('voronoi-001.png'))
   end
 

processing_app/basics/math/demo_noise.rb

@@ -0,0 +1,52 @@
+require 'propane'
+
+class DemoNoise < Propane::App
+  attr_reader :z
+
+  def setup
+    sketch_title 'Demo noise_mode'
+    stroke(255, 64)
+    @z = 0
+  end
+
+  def draw
+    noise_scale = 0.01
+    background(0)
+    grid(width, height, 10, 10) do |x, y|
+      arrow(x, y, noise(x * noise_scale, y * noise_scale, z * noise_scale) * TWO_PI * 2)
+    end
+    @z += 1
+  end
+
+  def mouse_pressed
+    mode = Propane::SIMPLEX
+    noise_mode mode
+    sketch_title "#{mode}"
+  end
+
+  def mouse_released
+    mode = Propane::VALUE
+    noise_mode(mode)
+    sketch_title "#{mode}"
+  end
+
+
+  def arrow(x, y, ang)
+    pushMatrix()
+    translate(x, y)
+    rotate(ang)
+    line(0, 0, 20, 0)
+    translate(20, 0)
+    rotate(PI + 0.4)
+    line(0, 0, 5, 0)
+    rotate(-0.8)
+    line(0, 0, 5, 0)
+    popMatrix()
+  end
+
+  def settings
+    size(600, 400, P2D)
+  end
+end
+
+DemoNoise.new