gravity.rb in rmagick-2.14.0

- old
+ new
@@ -1,79 +1,79 @@
-#! /usr/local/bin/ruby -w
+#!/usr/bin/env ruby -w
 #
 #   A RMagick version of Magick++/demo/gravity.cpp
 #
 
-require 'RMagick'
+require 'rmagick'
 
 x, y = 100, 100
 
 begin
 
-    pic = Magick::ImageList.new
+  pic = Magick::ImageList.new
 
-    lines = Magick::Draw.new
-    lines.stroke "#600"
-    lines.fill_opacity 0
-    lines.line 300,100, 300,500
-    lines.line 100,300, 500,300
-    lines.rectangle 100,100, 500,500
+  lines = Magick::Draw.new
+  lines.stroke '#600'
+  lines.fill_opacity 0
+  lines.line 300,100, 300,500
+  lines.line 100,300, 500,300
+  lines.rectangle 100,100, 500,500
 
-    draw = Magick::Draw.new
-    draw.pointsize = 30
-    draw.fill = "#600"
-    draw.undercolor = "red"
+  draw = Magick::Draw.new
+  draw.pointsize = 30
+  draw.fill = '#600'
+  draw.undercolor = 'red'
 
-    0.step(330, 30) { |angle|
-        puts "angle #{angle}"
-        pic.new_image(600, 600) { self.background_color = "white" }
+  0.step(330, 30) do |angle|
+    puts "angle #{angle}"
+    pic.new_image(600, 600) { self.background_color = 'white' }
 
-        lines.draw pic
+    lines.draw pic
 
-        draw.annotate(pic, 0,0,x,y, "NorthWest") {
-            self.gravity = Magick::NorthWestGravity
-            self.rotation = angle
-        }
-        draw.annotate(pic, 0,0,0,y, "North") {
-            self.gravity = Magick::NorthGravity
-            self.rotation = angle
-        }
-        draw.annotate(pic, 0,0,x,y, "NorthEast") {
-            self.gravity = Magick::NorthEastGravity
-            self.rotation = angle
-        }
-        draw.annotate(pic, 0,0,x,0, "East") {
-            self.gravity = Magick::EastGravity
-            self.rotation = angle
-        }
-        draw.annotate(pic, 0,0,0,0, "Center") {
-            self.gravity = Magick::CenterGravity
-            self.rotation = angle
-        }
-        draw.annotate(pic, 0,0,x,y, "SouthEast") {
-            self.gravity = Magick::SouthEastGravity
-            self.rotation = angle
-        }
-        draw.annotate(pic, 0,0,0,y, "South") {
-            self.gravity = Magick::SouthGravity
-            self.rotation = angle
-        }
-        draw.annotate(pic, 0,0,x,y, "SouthWest") {
-            self.gravity =  Magick::SouthWestGravity
-            self.rotation = angle
-        }
-        draw.annotate(pic, 0,0,x,0, "West") {
-            self.gravity = Magick::WestGravity
-            self.rotation = angle
-        }
-    }
+    draw.annotate(pic, 0,0,x,y, 'NorthWest') do
+      self.gravity = Magick::NorthWestGravity
+      self.rotation = angle
+    end
+    draw.annotate(pic, 0,0,0,y, 'North') do
+      self.gravity = Magick::NorthGravity
+      self.rotation = angle
+    end
+    draw.annotate(pic, 0,0,x,y, 'NorthEast') do
+      self.gravity = Magick::NorthEastGravity
+      self.rotation = angle
+    end
+    draw.annotate(pic, 0,0,x,0, 'East') do
+      self.gravity = Magick::EastGravity
+      self.rotation = angle
+    end
+    draw.annotate(pic, 0,0,0,0, 'Center') do
+      self.gravity = Magick::CenterGravity
+      self.rotation = angle
+    end
+    draw.annotate(pic, 0,0,x,y, 'SouthEast') do
+      self.gravity = Magick::SouthEastGravity
+      self.rotation = angle
+    end
+    draw.annotate(pic, 0,0,0,y, 'South') do
+      self.gravity = Magick::SouthGravity
+      self.rotation = angle
+    end
+    draw.annotate(pic, 0,0,x,y, 'SouthWest') do
+      self.gravity = Magick::SouthWestGravity
+      self.rotation = angle
+    end
+    draw.annotate(pic, 0,0,x,0, 'West') do
+      self.gravity = Magick::WestGravity
+      self.rotation = angle
+    end
+  end
 
-    puts "Writing image \"rm_gravity_out.miff\"..."
-    pic.delay = 20
-    pic.write "./rm_gravity_out.miff"
+  puts "Writing image \"rm_gravity_out.miff\"..."
+  pic.delay = 20
+  pic.write './rm_gravity_out.miff'
 
 rescue
-    puts "#{$!} exception raised."
-    exit 1
+  puts "#{$ERROR_INFO} exception raised."
+  exit 1
 end
 
 exit 0