使用这个脚本来快速生成随机的V大的复制单根线条练习(4x5)

gen_line_sketch.rb

# 使用这个脚本来快速生成随机的V大的复制单根线条练习(4x5)

require 'RMagick'

DEBUG = false

FONT_PATH = '/Users/Kanbaru/Downloads/FOT-NewRodinPro-L.otf'
FONT_SIZE = 25

def gen_line_sketch( input, output )
	img = Magick::Image.read( input ).first

	columns = 4 # 4
	rows = 5 # 5
	r = 200
	canvas_width = 800
	canvas_height = 800
	line_width = 10

	columns.times do |column|
		rows.times do |row|

			x, y = 500 + (column * r + column * 690) * 2, 500 + row * r + row * 735
			minX, maxX = x - canvas_width / 2, x + canvas_width / 2
			minY, maxY = y - canvas_height / 2, y + canvas_height / 2

			gc = Magick::Draw.new
			gc.stroke 'red'
			gc.stroke_width line_width
			gc.fill_opacity 0

			if rand >= 0.5
			# if true
				x1 = rand( minX..maxX )
				y1 = rand( minY..maxY )
				cx1 = rand( minX..maxX )
				cy1 = rand( minY..maxY )

				x2 = rand( minX..maxX )
				y2 = rand( minY..maxY )
				cx2 = rand( minX..maxX )
				cy2 = rand( minY..maxY )

				gc.bezier( x1, y1, cx1, cy1, cx2, cy2, x2, y2 )

				if DEBUG
					# Draw circles around endpoints
					gc.fill_opacity(0)
					gc.stroke('gray50').stroke_width(1)
					gc.circle( x1 - 3, y1 - 3, x1 + 3, y1 + 3 )
					gc.circle( x2 - 3, y2 - 3, x2 + 3, y2 + 3 )

					# Draw filled circles around control points
					gc.line( x1, y1, cx1, cy1 )
					gc.line( x2, y2, cx2, cy2 )
					gc.fill_opacity(1)
					gc.fill('gray50')
					gc.circle( cx1 - 3, cy1 - 3, cx1 + 3, cy1 + 3 )
					gc.circle( cx2 - 3, cy2 - 3, cx2 + 3, cy2 + 3 )

					# Annotate
					gc.font(FONT_PATH)
					gc.pointsize(FONT_SIZE)
					gc.font_weight(Magick::NormalWeight)
					gc.font_style(Magick::NormalStyle)
					gc.fill('red')
					gc.stroke('transparent')
					gc.text(x1, y1, "'#{x1.to_i},#{y1.to_i}'")
					gc.text(cx1, cy1, "'#{cx1.to_i},#{cy1.to_i}'")
					gc.text(x2, y2, "'#{x2.to_i},#{y2.to_i}'")
					gc.text(cx2, cy2, "'#{cx2.to_i},#{cy2.to_i}'")

					# range
					gc.font(FONT_PATH)
					gc.pointsize(FONT_SIZE)
					gc.font_weight(Magick::NormalWeight)
					gc.font_style(Magick::NormalStyle)
					gc.fill('green')
					gc.stroke('transparent')
					gc.text(x, y, "'#{x.to_i},#{y.to_i}'")
					gc.text(minX, minY, "'#{minX.to_i},#{minY.to_i}'")
					gc.text(maxX, maxY, "'#{maxX.to_i},#{maxY.to_i}'")
				end

			else
				x1 = rand( minX..maxX )
				y1 = rand( minY..maxY )
				cx1 = rand( minX..maxX )
				cy1 = rand( minY..maxY )

				x2 = rand( minX..maxX )
				y2 = rand( minY..maxY )
				cx2 = rand( minX..maxX )
				cy2 = rand( minY..maxY )
				mx = 

				x3 = rand( minX..maxX )
				y3 = rand( minY..maxY )
				cx3 = rand( minX..maxX )
				cy3 = rand( minY..maxY )

				gc.bezier( x1, y1, cx1, cy1, cx2, cy2, x2, y2, x2 + (x2 - cx2).abs, y2 + (y2 - cy2).abs, cx3, cy3, x3, y3  )
			end
			
			gc.draw img
		end
	end

	img.write( output ) {
		self.quality = 50 # 1~100
	}
	puts img.inspect
end

3.times do |n|
	gen_line_sketch "/Users/Kanbaru/Downloads/第1周/第1天/4.临摹单个颜色的副本.jpg", "/Users/Kanbaru/Downloads/第1周/第1天/1.复制单根线条_gen_#{n + 1}.jpg"
end