fix mirror2

Author: monkstone

library/video/capture/background_subtraction.rb

@@ -75,11 +75,11 @@ def captureEvent(c)
 
   def key_pressed
     video.load_pixels
-    @background_pixels = video.pixels.clone
+    @background_pixels = video.pixels.copy
   end
 
   def settings
-    size(960, 720, P2D)
+    size(480, 360, P2D)
   end
 end
 

library/video/capture/mirror2.rb

@@ -7,45 +7,48 @@
 # on brightness.
 class Mirror2 < Processing::App
   load_library :video
-  include_package 'processing.video'
-
+  java_import 'processing.video.Capture'
+  attr_reader :video, :cols, :rows
+  # Size of each cell in the grid
   CELL_SIZE = 15
 
-  attr_reader :video
-
   def setup
-    sketch_title 'Mirror2'
-    # Set up columns and rows
-    color_mode(RGB, 255, 255, 255, 100)
-    rect_mode(CENTER)
-    # This the default video input, see the GettingStartedCapture
-    # example if it creates an error
+    sketch_title 'mirror'
+    frame_rate(30)
+    @cols = width / CELL_SIZE
+    @rows = height / CELL_SIZE
+    colorMode(RGB, 255, 255, 255, 100)
+    # Try test_capture to find name of your Camera
     @video = Capture.new(self, width, height, "UVC Camera (046d:0825)")
     # Start capturing the images from the camera
     video.start
-    background(0)
   end
 
   def draw
-    return unless video.available
+    return unless video.available # ruby guard clause
 
+    background(0, 0, 255)
     video.read
     video.load_pixels
-    background(0, 0, 255)
-    # Begin loop for columns
-    grid(width, height, CELL_SIZE, CELL_SIZE) do |x, y|
-      loc = (width - x - 1) + y * width
-      # Each rect is colored white with a size determined by brightness
-      c = video.pixels[loc]
-      sz = (brightness(c) / 255.0) * CELL_SIZE
+    grid(cols, rows) do |i, j|
+      x = i * CELL_SIZE
+      y = j * CELL_SIZE
+      loc = (width - x -1 + y * width)# Reversing x to mirror the image
+      col = video.pixels[loc]
+      # Code for drawing a single rect
+      # Using translate in order for rotation to work properly
+      # rectangle size is based on brightness
+      sz = g.brightness(col) / 255 * CELL_SIZE
+      rect_mode(CENTER)
       fill(255)
       no_stroke
+      # Rects are larger than the cell for some overlap
       rect(x + CELL_SIZE / 2, y + CELL_SIZE / 2, sz, sz)
     end
   end
 
   def settings
-    size(480, 360, P2D)
+    size(480, 360)
   end
 end