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require 'rmagick'
# Demonstrate the Image#affine_transform method
img = Magick::Image.read('images/Flower_Hat.jpg').first
# Construct a simple affine matrix
flipflop = Magick::AffineMatrix.new(1, Math::PI / 6, Math::PI / 6, 1, 0, 0)
# Apply the transform
img = img.affine_transform(flipflop)
# Scale the image, make the background transparent,
# and write it to a JPEG file.
img.scale!(250.0 / img.rows)
img = img.matte_replace(0, 0)
img.write('affine_transform.jpg')
exit
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