commit
3b74e57e1d
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sudo apt install libcairo2-dev pkg-config
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virtualenv -p python3 .env
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source .env/bin/activate
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pip3 install -r requirements.txt
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After Width: | Height: | Size: 4.1 MiB |
@ -0,0 +1,212 @@
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import math
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import numpy as np
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touch_height = 20
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raise_height = 2
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head_x_offset = 50
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speed = 500
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lift_markers = True
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PREAMBLE = '''
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G1 Z20
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M107
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M190 S0
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M104 S0
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G28 ; home all axes
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G0 F{1}
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G1 Z{0}
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G1 Z{0}
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'''.format(touch_height + raise_height, speed)
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FINISH = """
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G1 Z{0} F7000
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M104 S0
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G28 X0 Y0
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M84
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""".format(75)
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import cairo, subprocess, bezier, os
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from svgpathtools import svg2paths, Line, QuadraticBezier, CubicBezier
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# Setup the file structure
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if not os.path.exists("output"):
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os.makedirs("output")
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# Convert the bmp to a vector svg
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file_name = "geom"
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subprocess.call(["mogrify", "-format", "bmp", "input-images/{}.svg".format(file_name)])
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subprocess.call(["mkbitmap", "input-images/{}.bmp".format(file_name), "-x",
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"-f", "15",
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#"-b", "0",
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"-o", "input-images/{}-n.bmp".format(file_name)
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])
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subprocess.call(["potrace",
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"-t", "20",
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"-z", "white",
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"-b", "svg",
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"input-images/{}-n.bmp".format(file_name),
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"--rotate", "90",
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"-o", "tmp/conversion-output.svg",
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])
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# read in the svg
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paths, attributes = svg2paths("tmp/conversion-output.svg")
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gcode = ""
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gcode += PREAMBLE
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started = False
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scale = 0.0045
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offset_x = 75 + head_x_offset
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offset_y = 20
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# Walk through the paths and create the GCODE
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for path in paths:
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previous_x = None
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previous_y = None
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# rotated = path.rotated(90)
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for part in path:
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start = part.start
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end = part.end
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start_x = start.real * scale + offset_x
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start_y = start.imag * scale + offset_y
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end_x = end.real * scale + offset_x
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end_y = end.imag * scale + offset_y
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# Check to see if the endpoint of the last cycle continues and wether we need to lift the pen or not
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lift = True
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if previous_x is not None and previous_y is not None:
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if abs(start.real - previous_x) < 30 and abs(start.imag - previous_y) < 30:
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lift = False
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# if the pen needs to lift,
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# if lift:
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previous_x = end.real
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previous_y = end.imag
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if lift:
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gcode += "G1 Z{}\n".format(raise_height + touch_height)
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else:
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gcode += "# NOT LIFTING\n"
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if isinstance(part, CubicBezier):
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nodes = np.asfortranarray([
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[start.real, part.control1.real, part.control2.real, end.real],
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[start.imag, part.control1.imag, part.control2.imag, end.imag],
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])
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curve = bezier.Curve.from_nodes(nodes)
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evals = []
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pos = np.linspace(0.1, 1, 10)
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for i in pos:
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evals.append(curve.evaluate(i))
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gcode += "G1 X{} Y{}\n".format(start_x, start_y)
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gcode += "G1 Z{} \n".format(touch_height)
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for i in evals:
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x = i[0][0]
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y = i[1][0]
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gcode += "G1 X{} Y{}\n".format(x * scale + offset_x, y * scale + offset_y)
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#gcode += "G1 X{} Y{}\n".format(end.real * scale + offset_x, end.imag * scale + offset_y)
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if isinstance(part, Line):
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gcode += "G1 X{} Y{}\n".format(start_x, start_y)
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gcode += "G1 Z{} \n".format(touch_height)
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gcode += "G1 X{} Y{}\n".format(end_x, end_y)
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gcode += FINISH
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output_gcode = open("output/gcode-output.gcode", "w")
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output_gcode.write(gcode)
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output_gcode.close()
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file = open("output/gcode-output.gcode", "r")
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x = None
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y = None
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with cairo.SVGSurface("rendered-output.svg", 300, 300) as surface:
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context = cairo.Context(surface)
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context.scale(1, 1)
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context.set_line_width(0.4)
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largest_x = 0
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largest_y = 0
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smallest_x = 300
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smallest_y = 300
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for line in file:
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split = line.split(" ")
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command = split[0]
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operands = split[1:]
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prev_x = x
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prev_y = y
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if command == "G1":
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for operand in operands:
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if operand.startswith("X"):
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x = float(operand[1:])
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if x > largest_x: largest_x = x
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if x < smallest_x: smallest_x = x
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elif operand.startswith("Y"):
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y = float(operand[1:])
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if y > largest_y: largest_y = y
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if y < smallest_y: smallest_y = y
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elif operand.startswith("Z{}".format(touch_height + raise_height)):
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# signify a lift
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if prev_x is not None and prev_y is not None and lift_markers:
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context.arc(prev_x, prev_y, 0.5, 0, 2*math.pi)
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context.stroke()
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prev_x = None
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prev_y = None
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x = None
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y = None
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if (prev_x != x and prev_x is not None) or (prev_y != y and prev_y is not None):
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context.line_to(prev_x, prev_y)
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context.line_to(x, y)
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context.stroke()
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print("Largest X : " + str(largest_x))
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print("Largest Y : " + str(largest_y))
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print("Smallest X : " + str(smallest_x))
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print("Smallest Y : " + str(smallest_y))
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if largest_x > 280:
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print("X OVERFLOW")
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if largest_y > 280:
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print("Y OVERFLOW")
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if smallest_x < 125:
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print("X_UNDERFLOW")
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if smallest_y < 20:
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print("Y_UNDERFLOW")
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@ -0,0 +1,26 @@
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asn1crypto==0.24.0
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bezier==0.9.0
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certifi==2018.1.18
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cffi==1.11.5
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chardet==3.0.4
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cryptography==2.1.4
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cycler==0.10.0
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decorator==4.1.2
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idna==2.8
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matplotlib==2.1.1
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numpy==1.15.4
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Pillow==5.1.0
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pkg-resources==0.0.0
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pycairo==1.16.2
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pycparser==2.19
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pycrypto==2.6.1
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PyNaCl==1.1.2
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PyOpenGL==3.1.0
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pyparsing==2.2.0
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pyqtgraph==0.10.0
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python-dateutil==2.7.5
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pytz==2018.9
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scipy==0.19.1
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six==1.12.0
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svgpathtools==1.3.3
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svgwrite==1.2.1
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Loading…
Reference in new issue