more samples

Author: monkstone

processing_app/library/vecmath/vec2d/library/wiggler/wiggler.rb

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+# frozen_string_literal: true
+java_import 'monkstone.vecmath.ShapeRender'
+# An object that wraps the PShape
+class Wiggler
+  include Propane::Proxy
+  attr_reader :original, :x, :y, :s, :yoff, :xoff
+  def initialize width, height
+    @x = width/2
+    @y = height/2
+    @yoff = 0
+    # The "original" locations of the vertices make up a circle
+    @original = (0...16).map{ |a| Vec2D.from_angle(PI * a / 8) * 100 }
+    # Now make the PShape with those vertices
+    @s = create_shape
+    renderer = ShapeRender.new(s) # Prefix with Sketch classname
+    s.begin_shape
+    s.fill(127)
+    s.stroke(0)
+    s.stroke_weight(2)
+    original.map{ |v| v.to_vertex(renderer) }
+    s.end_shape(CLOSE)
+  end
+
+  def wiggle
+    @xoff = 0
+    # Apply an offset to each vertex
+    rad = ->(pos){ (Vec2D.from_angle(2 * PI * noise(xoff, yoff)) * 4) + pos }
+    original.each_with_index do |pos, i|
+      # Calculate a new vertex location based on noise around "original" location
+      r = rad.call(pos)
+      # Set the location of each vertex to the new one
+      s.set_vertex(i, r.x, r.y)
+      # increment perlin noise x value
+      @xoff += 0.5
+    end
+    # Increment perlin noise y value
+    @yoff += 0.02
+  end
+
+  def display
+    push_matrix
+    translate(x, y)
+    shape(s)
+    pop_matrix
+  end
+end

processing_app/topics/animation/animated_sprite.rb

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+#!/usr/bin/env jruby
+require 'propane'
+# Animated Sprite (Shifty + Teddy)
+# by James Paterson, rubified by Martin Prout.
+#
+# Hold down the mouse button to change animations.
+# Demonstrates loading, displaying, and animating GIF images.
+# It would be easy to write a program to display
+# animated GIFs, but would not allow as much control over
+# the display sequence and rate of display.
+class AnimatedSprite < Propane::App
+  DRAG = 30.0
+  SHIFTY = 'PT_Shifty_%s.gif'
+  TEDDY = 'PT_Teddy_%s.gif'
+  attr_reader :xpos, :ypos, :animation1, :animation2
+
+  def setup
+    sketch_title 'Animated Sprite'
+    background(255, 204, 0)
+    frame_rate(24)
+    @animation1 = Animation.new(SHIFTY, 38)
+    @animation2 = Animation.new(TEDDY, 60)
+    @ypos = height * 0.25
+    @xpos = 0
+  end
+
+  def draw
+    dx = mouse_x - xpos
+    @xpos = xpos + dx / DRAG
+    # Display the sprite at the position xpos, ypos
+    if mouse_pressed?
+      background(153, 153, 0)
+      animation1.display(xpos - animation1.image_width / 2, ypos)
+    else
+      background(255, 204, 0)
+      animation2.display(xpos - animation2.image_width / 2, ypos)
+    end
+  end
+
+  def settings
+    size(640, 360)
+  end
+end
+
+# the animation class
+class Animation
+  include Propane::Proxy
+  attr_reader :images, :fcount, :frame
+
+  def initialize(image_format, count)
+    @fcount = count
+    @frame = 0
+    @images = (0...count).map do |i|
+      load_image(data_path(format(image_format, i.to_s.rjust(4, '0'))))
+    end
+  end
+
+  def display(xpos, ypos)
+    @frame = (frame + 1) % fcount
+    image(images[frame], xpos, ypos)
+  end
+
+  def image_width
+    images[0].width
+  end
+end
+
+
+
+AnimatedSprite.new