image_utils.rb in mittsu-0.1.1

- old
+ new
@@ -1,80 +1,84 @@
 module Mittsu
   module ImageUtils
-    def self.load_texture(url, mapping = Texture::DEFAULT_MAPPING)
-      loader = ImageLoader.new
+    class << self
+      def load_texture(url, mapping = Texture::DEFAULT_MAPPING)
+        loader = ImageLoader.new
 
-      Texture.new(nil, mapping).tap do |texture|
-        image = loader.load(url, flip: true)
-        texture.image = image
-        texture.needs_update = true
+        Texture.new(nil, mapping).tap do |texture|
+          image = loader.load(url, flip: true)
+          texture.image = image
+          texture.needs_update = true
 
-        texture.source_file = url
+          texture.source_file = url
+        end
       end
-    end
 
-    def self.load_texture_cube(array, mapping = Texture::DEFAULT_MAPPING)
-      images = HashArray.new
+      def load_texture_cube(array, mapping = Texture::DEFAULT_MAPPING)
+        images = HashArray.new
 
-      loader = ImageLoader.new
-      CubeTexture.new(images, mapping).tap do |texture|
-        loaded = 0
+        loader = ImageLoader.new
+        CubeTexture.new(images, mapping).tap do |texture|
+          loaded = 0
 
-        array.length.times do |i|
-          texture.images[i] = loader.load(array[i])
-          loaded += 1
-          if loaded == 6
-            texture.needs_update = true
+          array.length.times do |i|
+            texture.images[i] = loader.load(array[i])
+            loaded += 1
+            if loaded == 6
+              texture.needs_update = true
+            end
           end
         end
       end
-    end
 
-    def self.get_normal_map(image, depth)
-      # adapted from http://www.paulbrunt.co.uk/lab/heightnormal/
+      def get_normal_map(image, depth)
+        # adapted from http://www.paulbrunt.co.uk/lab/heightnormal/
 
-      # depth |= 1
-      #
-      # width = image.width
-      # height = image.height
+        # depth |= 1
+        #
+        # width = image.width
+        # height = image.height
 
-      # TODO: original version uses browser features ...
-    end
+        # TODO: original version uses browser features ...
+      end
 
-    def self.generate_data_texture(width, height, color)
-      size = width * height
-      data = Array.new(3 * size) # Uint8Array
+      def generate_data_texture(width, height, color)
+        size = width * height
+        data = Array.new(3 * size) # Uint8Array
 
-      r = (color.r * 255).floor
-      g = (color.g * 255).floor
-      b = (color.b * 255).floor
+        r = (color.r * 255).floor
+        g = (color.g * 255).floor
+        b = (color.b * 255).floor
 
-      size.times do |i|
-        data[i * 3]     = r
-        data[i * 3 + 1] = g
-        data[i * 3 + 2] = b
-      end
+        size.times do |i|
+          data[i * 3]     = r
+          data[i * 3 + 1] = g
+          data[i * 3 + 2] = b
+        end
 
-      texture = DataTexture.new(data, width, height, RGBFormat)
-      texture.needs_update = true
+        texture = DataTexture.new(data, width, height, RGBFormat)
+        texture.needs_update = true
 
-      texture
-    end
+        texture
+      end
 
-    private_class_method def self.cross(a, b)
-      [
-        a[1] * b[2] - a[2] * b[1],
-        a[2] * b[0] - a[0] * b[2],
-        a[0] * b[1] - a[1] * b[0]
-      ]
-    end
+      private
 
-    private_class_method def self.subtract(a, b)
-      [a[0] - b[0], a[1] - b[1], a[2] - b[2]]
-    end
+      def cross(a, b)
+        [
+          a[1] * b[2] - a[2] * b[1],
+          a[2] * b[0] - a[0] * b[2],
+          a[0] * b[1] - a[1] * b[0]
+        ]
+      end
 
-    private_class_method def self.normalize(a)
-      l = Math.sqrt(a[0] * a[0] + a[1] * a[1] + a[2] * a[2])
-      [a[0] / l, a[1] / l, a[2] / l]
+      def subtract(a, b)
+        [a[0] - b[0], a[1] - b[1], a[2] - b[2]]
+      end
+
+      def normalize(a)
+        l = Math.sqrt(a[0] * a[0] + a[1] * a[1] + a[2] * a[2])
+        [a[0] / l, a[1] / l, a[2] / l]
+      end
     end
   end
 end