Class: CreateGCodeArrayFromSVGCommands

Inherits:
Object
  • Object
show all
Defined in:
lib/convert_svg_string_to_gcode/helpers/create_gcode_array_from_svg_commands.rb

Class Method Summary collapse

Class Method Details

.create_gcode_path_from_bezier(svg_command, step) ⇒ Object 



35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
 
# File 'lib/convert_svg_string_to_gcode/helpers/create_gcode_array_from_svg_commands.rb', line 35

def self.create_gcode_path_from_bezier(svg_command, step)

  p0x  = svg_command.p0x
  p0y  = svg_command.p0y
  cp0x = svg_command.cp0x
  cp0y = svg_command.cp0y
  cp1x = svg_command.cp1x
  cp1y = svg_command.cp1y
  p1x  = svg_command.p1x
  p1y  = svg_command.p1y

  t  = step

  gcode_array = []

  while t<1 do
    ax = ( (1 - t) * p0x ) + (t * cp0x)
    ay = ( (1 - t) * p0y ) + (t * cp0y)
    bx = ( (1 - t) * cp0x ) + (t * cp1x)
    by = ( (1 - t) * cp0y ) + (t * cp1y)
    cx = ( (1 - t) * cp1x ) + (t * p1x)
    cy = ( (1 - t) * cp1y ) + (t * p1y)

    dx = ( (1 - t) * ax ) + (t * bx)
    dy = ( (1 - t) * ay ) + (t * by)
    ex = ( (1 - t) * bx ) + (t * cx)
    ey = ( (1 - t) * by ) + (t * cy)

    new_point_x = ( (1 - t) * dx ) + (t * ex)
    new_point_y = ( (1 - t) * dy ) + (t * ey)
    gcode_array << "G1 X#{new_point_x} Y#{new_point_y} #{PlotterConfig::Z_DOWN}"
    t+=step
  end
 return gcode_array
end

.draw_to_point(new_point) ⇒ Object 



28
29
30
31
32
33
 
# File 'lib/convert_svg_string_to_gcode/helpers/create_gcode_array_from_svg_commands.rb', line 28

def self.draw_to_point(new_point)
  x_value = new_point.p1x
  y_value = new_point.p1y
  command = ["G1 X#{x_value} Y#{y_value} #{PlotterConfig::Z_DOWN}"]
  return command
end

.move_to_point(new_point) ⇒ Object 



21
22
23
24
25
26
 
# File 'lib/convert_svg_string_to_gcode/helpers/create_gcode_array_from_svg_commands.rb', line 21

def self.move_to_point(new_point)
  x_value = new_point.p1x
  y_value = new_point.p1y
  command = ["G0 X#{x_value} Y#{y_value} #{PlotterConfig::Z_UP}"]
  return command
end

.perform(commands, options = {step: 0.20}) ⇒ Object 



3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
 
# File 'lib/convert_svg_string_to_gcode/helpers/create_gcode_array_from_svg_commands.rb', line 3

def self.perform(commands, options = {step: 0.20})
  start_point = nil
  step=options[:step]

  gcode_array = commands.map do |c|
    case c.type
    when ConversionConstants::MOVE
      move_to_point(c)
    when ConversionConstants::LINE_TO
      draw_to_point(c)
    when ConversionConstants::CURVE
      create_gcode_path_from_bezier(c, step)
    else
      throw Error
    end
  end
end