Mercurial > hg-public > lasercut-scripts / changeset
changeset
Implemented svg, png and hpgl compilers to pronterface
Fri, 03 Jun 2016 09:42:44 +0200
- author
- mbayer
- date
- Fri, 03 Jun 2016 09:42:44 +0200
- changeset 16
- 36d478bde840
- parent 15
- 0bbb006204fc
- child 17
- d93a721621bd
Implemented svg, png and hpgl compilers to pronterface
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/printrun-src/printrun/laser.py Fri Jun 03 09:42:44 2016 +0200 @@ -0,0 +1,370 @@ +""" +Lasercutter library +2015/2016 by NeoSoft, Malte Bayer +Intended to use standalone or implemented in Pronterface/Printrun +""" + +""" +LASERCUT SETTINGS +TODO: move to printrun settings +""" +ENGRAVE_SPEED = 40 * 60 # mm/min +# 30mm/min works for wood (regulate the output power to something between 10-30%) +# 30mm/min for black anodized aluminum to get a light engraving @ 100% power +# 10mm/min for black anodized aluminum to get more "silver" @ 100% power + +TRAVEL_SPEED = 60 * 60 +E_FACTOR = 0.1 + +# BITMAP: +DPI = 300 +GREY_THRESHOLD = 0 +CHANGE_DIRECTION = True +INVERT_CUT = True + +""" +STATIC DEFINITIONS +DO NOT CHANGE WORLD's RULES! +""" +INCH = 25.4 # mm +MM_PIXEL = round(INCH / DPI, 4) +STEPS_PIXEL = MM_PIXEL * 80 # mine is 80 steps/mm on XY + +# FOR HPGL: +SCALE_FACTOR = 1.0 / 40.0 # 40 plotter units + + +from PIL import Image +import sys + +# Imports for SVG +import xml.etree.ElementTree as ET +import math +from svg2gcode import shapes as shapes_pkg +from svg2gcode.shapes import point_generator + + +class Lasercutter: + """ + Lasercutter methods + parameters: log = logger function (accepts a string) + """ + def __init__(self, pronterwindow = None): + if pronterwindow: + self.pronterwindow = pronterwindow + self.log = pronterwindow.log + else: + self.pronterwindow = None + self.log = lambda : None + self.log("\nLasercutter library initialized resolution: %f mm per pixel" % MM_PIXEL) + if STEPS_PIXEL <= 5: + self.log("WARNING: STEPS PER PIXEL NEEDS TO BE > 5 (otherwise marlin joins lines): %f" % STEPS_PIXEL) + + + def pixel2bit(self, pixel, threshold=128): + """Convert the pixel value to a bit.""" + # some really weird stuff here ;-P + + # RGB to greyscale + #print pixel + #print type(pixel) + if isinstance(pixel, tuple): + #rgb + pixel = pixel[0]*0.2989 + pixel[1]*0.5870 + pixel[2]*0.1140 + threshold = 128 + if pixel > threshold: + return 1 + else: + return 0 + + # color palette + if pixel <= threshold: + return 1 + else: + return 0 + + def image2gcode(self, filename): + """ + Open a image file and get the basic information about it. + Then convert it to gcode (replacing the existing gcode buffer contents) + """ + try: + im = Image.open(filename) + except: + self.log("Unable to open %s" % filename) + return False + + self.log("Converting Image for lasercut:") + self.log("File: %s" % filename) + self.log("format: %s, mode: %s" % (im.format, im.mode)) + width,height = im.size + self.log("size: %d x %d pixels" % im.size) + + pix = im.load() + + fo = open(filename + ".g", "w") + fo.write(""" +; Filename: %s +; GCode generated by bitplotter one-night-quick-hack script (marlin code flavour) +; 2015/2016 by NeoSoft - Malte Bayer + +G21 ; Metric +; We assume Z is in focus height and laser head is focus at bottom left of image! +G92 X0 Y0 E0; set zero position - new origin +G90 ; absolute positioning +M82 ; Set extruder (laser) to absolute positioning +M201 X1000 Y1000 E500 ; Set acceleration +M203 X1000 Y1000 Z4 E10 ; Set max feedrate +M209 S0 ; disable firmware retraction, we dont want to burn holes... +M302 ; Allow cold extrudes - doesnt matter because we hack the extruder physically off with the M571 E mod +M571 S1 E1 ; Activate Laser output on extrusion, but block real motor movement! +G0 X0 Y0 F%d ; Set moving speed TRAVEL_SPEED +G1 X0 Y0 F%d ; Set linear engraving speed ENGRAVE_SPEED + +""" % (filename, TRAVEL_SPEED, ENGRAVE_SPEED) ) + self.log("Travel/Engrave speed: %d mm/sec, %d mm/sec" % ( + TRAVEL_SPEED / 60, ENGRAVE_SPEED / 60) ) + + fo.write(";Start engraving the raster image: %dx%d points @ %d DPI = %.0fx%.0f mm\n\n" % ( + im.size[0], im.size[1], DPI, im.size[0]*MM_PIXEL, im.size[1]*MM_PIXEL) ) + + INVERT_Y = MM_PIXEL * (im.size[1] -1) * (-1) + DIR = 1 + for X in range(im.size[0]): + fo.write("; X=%d printing row: direction %i\n" % (X, DIR)) + fo.write("G92 E0\n") + E = 0 + last_bit = 1 # we engrave on black pixel = 0 + START_Y = 0 + if DIR > 0: + range_start = 0 + range_stop = im.size[1] + else: + range_start = im.size[1] -1 + range_stop = -1 + + for Y in range(range_start, range_stop, DIR): + YMM = abs((Y * MM_PIXEL) + INVERT_Y) + XMM = X * MM_PIXEL + #print "X %d Y %d" % (X, Y) + bit = self.pixel2bit(pix[X, Y], GREY_THRESHOLD) + if INVERT_CUT: + if bit == 0: + bit = 1 + else: + bit = 0 + if last_bit == bit: + if bit == 1: + # nothing to do, + continue + else: + # are we at the end of Y range? + #print Y + if (Y == (im.size[1] - 1)) or (Y == 0): + # draw line + if DIR > 0: + E = E + MM_PIXEL * (Y - START_Y) + else: + E = E + MM_PIXEL * (START_Y - Y) + fo.write("G1 X%.4f Y%.4f E%.4f\n" % (XMM, YMM, E * E_FACTOR)) + else: + # bit value has changed! + if bit == 0: + # jump to start of line to write + START_Y = Y + fo.write("G0 X%.4f Y%.4f\n" % (XMM, YMM)) + else: + # end of line to write + if DIR > 0: + E = E + (MM_PIXEL * (Y - START_Y)) + else: + E = E + (MM_PIXEL * (START_Y - Y)) + fo.write("G1 X%.4f Y%.4f E%.4f\n" % (XMM, YMM, E * E_FACTOR)) + last_bit = bit + if CHANGE_DIRECTION: + DIR = DIR * (-1) # change y direction on every X + + fo.write("M571 S0 E0\n") + fo.write("M501 ; undo all settings made\n") + #fo.write("G28 X0 Y0 ; Home position\n") + + fo.close() + + if self.pronterwindow: + self.log("") + self.pronterwindow.load_gcode_async(filename + '.g') + + def hpgl2gcode(self, filename): + OFFSET_X = 0.0 + OFFSET_Y = 0.0 + + self.log("Converting HPGL plot for lasercut:") + self.log("File: %s" % filename) + + fi = open(filename, "r") + fo = open(filename + ".g", "w") + + + fo.write(""" +; Filename: %s +; GCode generated by hpglplotter (marlin code flavour) + +G21 ; Metric +; We assume Z is in focus height and laser head is focus at bottom left of image! +G92 X0 Y0 E0; set zero position - new origin +G90 ; absolute positioning +M82 ; Set extruder (laser) to absolute positioning +M201 X1000 Y1000 E500 ; Set acceleration +M203 X1000 Y1000 Z4 E10 ; Set max feedrate +M209 S0 ; disable firmware retraction, we dont want to burn holes... +M302 ; Allow cold extrudes - doesnt matter because we hack the extruder physically off with the M571 E mod +M571 S1 E1 ; Activate Laser output on extrusion, but block real motor movement! +G0 X0 Y0 F%d ; Set moving speed TRAVEL_SPEED +G1 X0 Y0 F%d ; Set linear engraving speed ENGRAVE_SPEED + +""" % (filename, TRAVEL_SPEED, ENGRAVE_SPEED) ) + + G = "0" + LASER_STATE = 0 + last_coord = [0.0,0.0] + last_cmd = "" + + for line in fi.readlines(): + for action in line.split(";"): + action = action.strip() + if action != "": + cmd = action[:2] + if cmd == "PD": + LASER_STATE = 1 + elif cmd == "PU": + LASER_STATE = 0 + if last_cmd == "PD": + OFFSET_X = coord[0] * -1 + OFFSET_Y = coord[1] * -1 + fo.write("; PD PU detected, set coord offset %.4f x %.4f mm\n" % (OFFSET_X, OFFSET_Y)) + elif cmd == "PA" or cmd == "PR": + # TODO: convert relative coordinates to absolute here! + coord = action[2:].split(",") + coord[0] = (float(coord[0]) + OFFSET_X) * SCALE_FACTOR + coord[1] = (float(coord[1]) + OFFSET_Y) * SCALE_FACTOR + if LASER_STATE: + EN = " E%.4f F%.4f" % ( + E_FACTOR * math.hypot(coord[0] - last_coord[0], coord[1] - last_coord[1]), + ENGRAVE_SPEED) + else: + EN = " F%.4f" % TRAVEL_SPEED + + fo.write("G%d X%.4f Y%.4f%s\n" % ( + LASER_STATE, coord[0], coord[1], EN) ) + last_coord = coord + elif cmd == "IN": + pass + elif cmd == "PT": + print "Ignoring pen thickness" + else: + print "UNKNOWN: %s" % action + last_cmd = cmd + + + fo.write("M571 S0 E0\n") + fo.write("M501 ; undo all settings made\n") + #fo.write("G28 X0 Y0 ; Home position\n") + + fi.close() + fo.close() + + if self.pronterwindow: + self.log("") + self.pronterwindow.load_gcode_async(filename + '.g') + + + def svg2gcode(self, filename, bed_max_x = 200, bed_max_y = 200, smoothness = 0.2): + self.log("Generating paths from SVG...") + + preamble = "" + postamble = "" + shape_preamble = "G92 E0\n" + shape_postamble = "" + + """ + Used to control the smoothness/sharpness of the curves. + Smaller the value greater the sharpness. Make sure the + value is greater than 0.1 + """ + if smoothness < 0.1: smoothness = 0.1 + + svg_shapes = set(['rect', 'circle', 'ellipse', 'line', 'polyline', 'polygon', 'path']) + + tree = ET.parse(filename) + root = tree.getroot() + + width = root.get('width') + height = root.get('height') + if width == None or height == None: + viewbox = root.get('viewBox') + if viewbox: + _, _, width, height = viewbox.split() + + if width == None or height == None: + self.log("Unable to get width and height for the svg!") + return False + + width = float(width.replace("px", "")) + height = float(height.replace("px", "")) + + scale_x = bed_max_x / max(width, height) + scale_y = bed_max_y / max(width, height) + + self.log("Scaling factor: %.2f, %.2f" % (scale_x,scale_y)) + + fo = open(filename + ".g", "w") + fo.write(preamble) + + for elem in root.iter(): + try: + _, tag_suffix = elem.tag.split('}') + except ValueError: + continue + + if tag_suffix in svg_shapes: + shape_class = getattr(shapes_pkg, tag_suffix) + shape_obj = shape_class(elem) + d = shape_obj.d_path() + m = shape_obj.transformation_matrix() + + if d: + fo.write("; printing shape: %s\n" % (tag_suffix)) + E = 0 + xo = 0 + yo = 0 + fo.write(shape_preamble) + p = point_generator(d, m, smoothness) + start = True + for x,y,pen in p: + y = height - y + xs = scale_x * x + ys = scale_y * y + if not pen: start = True + if xs >= 0 and xs <= bed_max_x and ys >= 0 and ys <= bed_max_y: + if start: + fo.write("G0 X%0.2f Y%0.2f ; Move to start of shape\n" % (xs, ys)) + start = False + xo = xs + yo = ys + else: + e_distance = math.hypot(xs - xo, ys - yo) + xo = xs + yo = ys + E = E + (MM_PIXEL * e_distance) + fo.write("G1 X%0.2f Y%0.2f E%.4f\n" % (xs, ys, E * E_FACTOR)) + else: + self.log("Position outside print dimension: %d, %d" % (xs, ys)) + fo.write(shape_postamble) + + fo.write(postamble) + fo.close() + + if self.pronterwindow: + self.log("") + self.pronterwindow.load_gcode_async(filename + '.g') + \ No newline at end of file
--- a/printrun-src/printrun/pronterface.py Fri Jun 03 09:16:07 2016 +0200 +++ b/printrun-src/printrun/pronterface.py Fri Jun 03 09:42:44 2016 +0200 @@ -1,5 +1,8 @@ #!/usr/bin/env python +# FILE MODIFIED BY NEOSOFT - MALTE BAYER +# Embed Lasercut functions from laser.py + # This file is part of the Printrun suite. # # Printrun is free software: you can redistribute it and/or modify @@ -15,6 +18,8 @@ # You should have received a copy of the GNU General Public License # along with Printrun. If not, see <http://www.gnu.org/licenses/>. +from laser import Lasercutter + import os import Queue import sys @@ -1338,7 +1343,8 @@ dlg = None if filename is None: dlg = wx.FileDialog(self, _("Open file to print"), basedir, style = wx.FD_OPEN | wx.FD_FILE_MUST_EXIST) - dlg.SetWildcard(_("OBJ, STL, and GCODE files (*.gcode;*.gco;*.g;*.stl;*.STL;*.obj;*.OBJ)|*.gcode;*.gco;*.g;*.stl;*.STL;*.obj;*.OBJ|GCODE files (*.gcode;*.gco;*.g)|*.gcode;*.gco;*.g|OBJ, STL files (*.stl;*.STL;*.obj;*.OBJ)|*.stl;*.STL;*.obj;*.OBJ|All Files (*.*)|*.*")) + # add image files to GCODE file list + dlg.SetWildcard(_("GCODE and Image files|*.gcode;*.gco;*.g;*.png;*.svg;*.hpgl;*.plt|OBJ, STL, and GCODE files (*.gcode;*.gco;*.g;*.stl;*.STL;*.obj;*.OBJ)|*.gcode;*.gco;*.g;*.stl;*.STL;*.obj;*.OBJ|GCODE files (*.gcode;*.gco;*.g)|*.gcode;*.gco;*.g|OBJ, STL files (*.stl;*.STL;*.obj;*.OBJ)|*.stl;*.STL;*.obj;*.OBJ|All Files (*.*)|*.*")) try: dlg.SetFilterIndex(self.settings.last_file_filter) except: @@ -1375,6 +1381,18 @@ "\n" + traceback.format_exc()) if name.lower().endswith(".stl") or name.lower().endswith(".obj"): self.slice(name) + elif name.lower().endswith(".png") or name.lower().endswith(".jpg") or name.lower().endswith(".gif"): + # Generate GCODE from IMAGE + lc = Lasercutter(pronterwindow = self) + lc.image2gcode(name) + elif name.lower().endswith(".svg"): + # Generate GCODE from SVG + lc = Lasercutter(pronterwindow = self) + lc.svg2gcode(name) + elif name.lower().endswith(".hpgl") or name.lower().endswith(".plt"): + # Generate GCODE from HPGL + lc = Lasercutter(pronterwindow = self) + lc.hpgl2gcode(name) else: self.load_gcode_async(name) else:
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/printrun-src/printrun/svg2gcode/README.md Fri Jun 03 09:42:44 2016 +0200 @@ -0,0 +1,12 @@ +A fast svg to gcode compiler. + +cat svgfile | python svg2gcode.py + +The compiler is based on the eggbot project and it basically converts all of the SVG shapes into bezier curves. The bezier curves are then recursively sub divided until desired smoothness is achieved. The sub curves are then approximated as lines which are then converted into g-code. + +Some of the characteristics of the compiler can be changed by editing the config.py + +Inkscape Plugin +--------------- + +To get the Inkscape plugin please checkout the __plasibot_laser__ branch.
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/printrun-src/printrun/svg2gcode/bezmisc.py Fri Jun 03 09:42:44 2016 +0200 @@ -0,0 +1,274 @@ +#!/usr/bin/env python +''' +Copyright (C) 2010 Nick Drobchenko, nick@cnc-club.ru +Copyright (C) 2005 Aaron Spike, aaron@ekips.org + +This program is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program; if not, write to the Free Software +Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA +''' + +import math, cmath + +def rootWrapper(a,b,c,d): + if a: + # Monics formula see http://en.wikipedia.org/wiki/Cubic_function#Monic_formula_of_roots + a,b,c = (b/a, c/a, d/a) + m = 2.0*a**3 - 9.0*a*b + 27.0*c + k = a**2 - 3.0*b + n = m**2 - 4.0*k**3 + w1 = -.5 + .5*cmath.sqrt(-3.0) + w2 = -.5 - .5*cmath.sqrt(-3.0) + if n < 0: + m1 = pow(complex((m+cmath.sqrt(n))/2),1./3) + n1 = pow(complex((m-cmath.sqrt(n))/2),1./3) + else: + if m+math.sqrt(n) < 0: + m1 = -pow(-(m+math.sqrt(n))/2,1./3) + else: + m1 = pow((m+math.sqrt(n))/2,1./3) + if m-math.sqrt(n) < 0: + n1 = -pow(-(m-math.sqrt(n))/2,1./3) + else: + n1 = pow((m-math.sqrt(n))/2,1./3) + x1 = -1./3 * (a + m1 + n1) + x2 = -1./3 * (a + w1*m1 + w2*n1) + x3 = -1./3 * (a + w2*m1 + w1*n1) + return (x1,x2,x3) + elif b: + det=c**2.0-4.0*b*d + if det: + return (-c+cmath.sqrt(det))/(2.0*b),(-c-cmath.sqrt(det))/(2.0*b) + else: + return -c/(2.0*b), + elif c: + return 1.0*(-d/c), + return () + +def bezierparameterize(((bx0,by0),(bx1,by1),(bx2,by2),(bx3,by3))): + #parametric bezier + x0=bx0 + y0=by0 + cx=3*(bx1-x0) + bx=3*(bx2-bx1)-cx + ax=bx3-x0-cx-bx + cy=3*(by1-y0) + by=3*(by2-by1)-cy + ay=by3-y0-cy-by + + return ax,ay,bx,by,cx,cy,x0,y0 + #ax,ay,bx,by,cx,cy,x0,y0=bezierparameterize(((bx0,by0),(bx1,by1),(bx2,by2),(bx3,by3))) + +def linebezierintersect(((lx1,ly1),(lx2,ly2)),((bx0,by0),(bx1,by1),(bx2,by2),(bx3,by3))): + #parametric line + dd=lx1 + cc=lx2-lx1 + bb=ly1 + aa=ly2-ly1 + + if aa: + coef1=cc/aa + coef2=1 + else: + coef1=1 + coef2=aa/cc + + ax,ay,bx,by,cx,cy,x0,y0=bezierparameterize(((bx0,by0),(bx1,by1),(bx2,by2),(bx3,by3))) + #cubic intersection coefficients + a=coef1*ay-coef2*ax + b=coef1*by-coef2*bx + c=coef1*cy-coef2*cx + d=coef1*(y0-bb)-coef2*(x0-dd) + + roots = rootWrapper(a,b,c,d) + retval = [] + for i in roots: + if type(i) is complex and i.imag==0: + i = i.real + if type(i) is not complex and 0<=i<=1: + retval.append(bezierpointatt(((bx0,by0),(bx1,by1),(bx2,by2),(bx3,by3)),i)) + return retval + +def bezierpointatt(((bx0,by0),(bx1,by1),(bx2,by2),(bx3,by3)),t): + ax,ay,bx,by,cx,cy,x0,y0=bezierparameterize(((bx0,by0),(bx1,by1),(bx2,by2),(bx3,by3))) + x=ax*(t**3)+bx*(t**2)+cx*t+x0 + y=ay*(t**3)+by*(t**2)+cy*t+y0 + return x,y + +def bezierslopeatt(((bx0,by0),(bx1,by1),(bx2,by2),(bx3,by3)),t): + ax,ay,bx,by,cx,cy,x0,y0=bezierparameterize(((bx0,by0),(bx1,by1),(bx2,by2),(bx3,by3))) + dx=3*ax*(t**2)+2*bx*t+cx + dy=3*ay*(t**2)+2*by*t+cy + return dx,dy + +def beziertatslope(((bx0,by0),(bx1,by1),(bx2,by2),(bx3,by3)),(dy,dx)): + ax,ay,bx,by,cx,cy,x0,y0=bezierparameterize(((bx0,by0),(bx1,by1),(bx2,by2),(bx3,by3))) + #quadratic coefficents of slope formula + if dx: + slope = 1.0*(dy/dx) + a=3*ay-3*ax*slope + b=2*by-2*bx*slope + c=cy-cx*slope + elif dy: + slope = 1.0*(dx/dy) + a=3*ax-3*ay*slope + b=2*bx-2*by*slope + c=cx-cy*slope + else: + return [] + + roots = rootWrapper(0,a,b,c) + retval = [] + for i in roots: + if type(i) is complex and i.imag==0: + i = i.real + if type(i) is not complex and 0<=i<=1: + retval.append(i) + return retval + +def tpoint((x1,y1),(x2,y2),t): + return x1+t*(x2-x1),y1+t*(y2-y1) +def beziersplitatt(((bx0,by0),(bx1,by1),(bx2,by2),(bx3,by3)),t): + m1=tpoint((bx0,by0),(bx1,by1),t) + m2=tpoint((bx1,by1),(bx2,by2),t) + m3=tpoint((bx2,by2),(bx3,by3),t) + m4=tpoint(m1,m2,t) + m5=tpoint(m2,m3,t) + m=tpoint(m4,m5,t) + + return ((bx0,by0),m1,m4,m),(m,m5,m3,(bx3,by3)) + +''' +Approximating the arc length of a bezier curve +according to <http://www.cit.gu.edu.au/~anthony/info/graphics/bezier.curves> + +if: + L1 = |P0 P1| +|P1 P2| +|P2 P3| + L0 = |P0 P3| +then: + L = 1/2*L0 + 1/2*L1 + ERR = L1-L0 +ERR approaches 0 as the number of subdivisions (m) increases + 2^-4m + +Reference: +Jens Gravesen <gravesen@mat.dth.dk> +"Adaptive subdivision and the length of Bezier curves" +mat-report no. 1992-10, Mathematical Institute, The Technical +University of Denmark. +''' +def pointdistance((x1,y1),(x2,y2)): + return math.sqrt(((x2 - x1) ** 2) + ((y2 - y1) ** 2)) +def Gravesen_addifclose(b, len, error = 0.001): + box = 0 + for i in range(1,4): + box += pointdistance(b[i-1], b[i]) + chord = pointdistance(b[0], b[3]) + if (box - chord) > error: + first, second = beziersplitatt(b, 0.5) + Gravesen_addifclose(first, len, error) + Gravesen_addifclose(second, len, error) + else: + len[0] += (box / 2.0) + (chord / 2.0) +def bezierlengthGravesen(b, error = 0.001): + len = [0] + Gravesen_addifclose(b, len, error) + return len[0] + +# balf = Bezier Arc Length Function +balfax,balfbx,balfcx,balfay,balfby,balfcy = 0,0,0,0,0,0 +def balf(t): + retval = (balfax*(t**2) + balfbx*t + balfcx)**2 + (balfay*(t**2) + balfby*t + balfcy)**2 + return math.sqrt(retval) + +def Simpson(f, a, b, n_limit, tolerance): + n = 2 + multiplier = (b - a)/6.0 + endsum = f(a) + f(b) + interval = (b - a)/2.0 + asum = 0.0 + bsum = f(a + interval) + est1 = multiplier * (endsum + (2.0 * asum) + (4.0 * bsum)) + est0 = 2.0 * est1 + #print multiplier, endsum, interval, asum, bsum, est1, est0 + while n < n_limit and abs(est1 - est0) > tolerance: + n *= 2 + multiplier /= 2.0 + interval /= 2.0 + asum += bsum + bsum = 0.0 + est0 = est1 + for i in xrange(1, n, 2): + bsum += f(a + (i * interval)) + est1 = multiplier * (endsum + (2.0 * asum) + (4.0 * bsum)) + #print multiplier, endsum, interval, asum, bsum, est1, est0 + return est1 + +def bezierlengthSimpson(((bx0,by0),(bx1,by1),(bx2,by2),(bx3,by3)), tolerance = 0.001): + global balfax,balfbx,balfcx,balfay,balfby,balfcy + ax,ay,bx,by,cx,cy,x0,y0=bezierparameterize(((bx0,by0),(bx1,by1),(bx2,by2),(bx3,by3))) + balfax,balfbx,balfcx,balfay,balfby,balfcy = 3*ax,2*bx,cx,3*ay,2*by,cy + return Simpson(balf, 0.0, 1.0, 4096, tolerance) + +def beziertatlength(((bx0,by0),(bx1,by1),(bx2,by2),(bx3,by3)), l = 0.5, tolerance = 0.001): + global balfax,balfbx,balfcx,balfay,balfby,balfcy + ax,ay,bx,by,cx,cy,x0,y0=bezierparameterize(((bx0,by0),(bx1,by1),(bx2,by2),(bx3,by3))) + balfax,balfbx,balfcx,balfay,balfby,balfcy = 3*ax,2*bx,cx,3*ay,2*by,cy + t = 1.0 + tdiv = t + curlen = Simpson(balf, 0.0, t, 4096, tolerance) + targetlen = l * curlen + diff = curlen - targetlen + while abs(diff) > tolerance: + tdiv /= 2.0 + if diff < 0: + t += tdiv + else: + t -= tdiv + curlen = Simpson(balf, 0.0, t, 4096, tolerance) + diff = curlen - targetlen + return t + +#default bezier length method +bezierlength = bezierlengthSimpson + +if __name__ == '__main__': +# import timing + #print linebezierintersect(((,),(,)),((,),(,),(,),(,))) + #print linebezierintersect(((0,1),(0,-1)),((-1,0),(-.5,0),(.5,0),(1,0))) + tol = 0.00000001 + curves = [((0,0),(1,5),(4,5),(5,5)), + ((0,0),(0,0),(5,0),(10,0)), + ((0,0),(0,0),(5,1),(10,0)), + ((-10,0),(0,0),(10,0),(10,10)), + ((15,10),(0,0),(10,0),(-5,10))] + ''' + for curve in curves: + timing.start() + g = bezierlengthGravesen(curve,tol) + timing.finish() + gt = timing.micro() + + timing.start() + s = bezierlengthSimpson(curve,tol) + timing.finish() + st = timing.micro() + + print g, gt + print s, st + ''' + for curve in curves: + print beziertatlength(curve,0.5) + + +# vim: expandtab shiftwidth=4 tabstop=8 softtabstop=4 encoding=utf-8 textwidth=99
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/printrun-src/printrun/svg2gcode/config.py Fri Jun 03 09:42:44 2016 +0200 @@ -0,0 +1,26 @@ +"""G-code emitted at the start of processing the SVG file""" +preamble = "G28\nG1 Z5.0" + +"""G-code emitted at the end of processing the SVG file""" +postamble = "G28" + +"""G-code emitted before processing a SVG shape""" +shape_preamble = "G4 P200" + +"""G-code emitted after processing a SVG shape""" +shape_postamble = "G4 P200" + +"""Print bed width in mm""" +bed_max_x = 200 + +"""Print bed height in mm""" +bed_max_y = 200 + +""" +Used to control the smoothness/sharpness of the curves. +Smaller the value greater the sharpness. Make sure the +value is greater than 0.1 +""" +smoothness = 0.2 + +
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/printrun-src/printrun/svg2gcode/cspsubdiv.py Fri Jun 03 09:42:44 2016 +0200 @@ -0,0 +1,38 @@ +#!/usr/bin/env python +from bezmisc import * +from ffgeom import * + +def maxdist(((p0x,p0y),(p1x,p1y),(p2x,p2y),(p3x,p3y))): + p0 = Point(p0x,p0y) + p1 = Point(p1x,p1y) + p2 = Point(p2x,p2y) + p3 = Point(p3x,p3y) + + s1 = Segment(p0,p3) + return max(s1.distanceToPoint(p1),s1.distanceToPoint(p2)) + + +def cspsubdiv(csp,flat): + for sp in csp: + subdiv(sp,flat) + +def subdiv(sp,flat,i=1): + p0 = sp[i-1][1] + p1 = sp[i-1][2] + p2 = sp[i][0] + p3 = sp[i][1] + + b = (p0,p1,p2,p3) + m = maxdist(b) + if m <= flat: + try: + subdiv(sp,flat,i+1) + except IndexError: + pass + else: + one, two = beziersplitatt(b,0.5) + sp[i-1][2] = one[1] + sp[i][0] = two[2] + p = [one[2],one[3],two[1]] + sp[i:1] = [p] + subdiv(sp,flat,i)
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/printrun-src/printrun/svg2gcode/cubicsuperpath.py Fri Jun 03 09:42:44 2016 +0200 @@ -0,0 +1,169 @@ +#!/usr/bin/env python +""" +cubicsuperpath.py + +Copyright (C) 2005 Aaron Spike, aaron@ekips.org + +This program is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program; if not, write to the Free Software +Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + +""" +import simplepath +from math import * + +def matprod(mlist): + prod=mlist[0] + for m in mlist[1:]: + a00=prod[0][0]*m[0][0]+prod[0][1]*m[1][0] + a01=prod[0][0]*m[0][1]+prod[0][1]*m[1][1] + a10=prod[1][0]*m[0][0]+prod[1][1]*m[1][0] + a11=prod[1][0]*m[0][1]+prod[1][1]*m[1][1] + prod=[[a00,a01],[a10,a11]] + return prod +def rotmat(teta): + return [[cos(teta),-sin(teta)],[sin(teta),cos(teta)]] +def applymat(mat, pt): + x=mat[0][0]*pt[0]+mat[0][1]*pt[1] + y=mat[1][0]*pt[0]+mat[1][1]*pt[1] + pt[0]=x + pt[1]=y +def norm(pt): + return sqrt(pt[0]*pt[0]+pt[1]*pt[1]) + +def ArcToPath(p1,params): + A=p1[:] + rx,ry,teta,longflag,sweepflag,x2,y2=params[:] + teta = teta*pi/180.0 + B=[x2,y2] + if rx==0 or ry==0: + return([[A,A,A],[B,B,B]]) + mat=matprod((rotmat(teta),[[1/rx,0],[0,1/ry]],rotmat(-teta))) + applymat(mat, A) + applymat(mat, B) + k=[-(B[1]-A[1]),B[0]-A[0]] + d=k[0]*k[0]+k[1]*k[1] + k[0]/=sqrt(d) + k[1]/=sqrt(d) + d=sqrt(max(0,1-d/4)) + if longflag==sweepflag: + d*=-1 + O=[(B[0]+A[0])/2+d*k[0],(B[1]+A[1])/2+d*k[1]] + OA=[A[0]-O[0],A[1]-O[1]] + OB=[B[0]-O[0],B[1]-O[1]] + start=acos(OA[0]/norm(OA)) + if OA[1]<0: + start*=-1 + end=acos(OB[0]/norm(OB)) + if OB[1]<0: + end*=-1 + + if sweepflag and start>end: + end +=2*pi + if (not sweepflag) and start<end: + end -=2*pi + + NbSectors=int(abs(start-end)*2/pi)+1 + dTeta=(end-start)/NbSectors + #v=dTeta*2/pi*0.552 + #v=dTeta*2/pi*4*(sqrt(2)-1)/3 + v = 4*tan(dTeta/4)/3 + #if not sweepflag: + # v*=-1 + p=[] + for i in range(0,NbSectors+1,1): + angle=start+i*dTeta + v1=[O[0]+cos(angle)-(-v)*sin(angle),O[1]+sin(angle)+(-v)*cos(angle)] + pt=[O[0]+cos(angle) ,O[1]+sin(angle) ] + v2=[O[0]+cos(angle)- v *sin(angle),O[1]+sin(angle)+ v *cos(angle)] + p.append([v1,pt,v2]) + p[ 0][0]=p[ 0][1][:] + p[-1][2]=p[-1][1][:] + + mat=matprod((rotmat(teta),[[rx,0],[0,ry]],rotmat(-teta))) + for pts in p: + applymat(mat, pts[0]) + applymat(mat, pts[1]) + applymat(mat, pts[2]) + return(p) + +def CubicSuperPath(simplepath): + csp = [] + subpath = -1 + subpathstart = [] + last = [] + lastctrl = [] + for s in simplepath: + cmd, params = s + if cmd == 'M': + if last: + csp[subpath].append([lastctrl[:],last[:],last[:]]) + subpath += 1 + csp.append([]) + subpathstart = params[:] + last = params[:] + lastctrl = params[:] + elif cmd == 'L': + csp[subpath].append([lastctrl[:],last[:],last[:]]) + last = params[:] + lastctrl = params[:] + elif cmd == 'C': + csp[subpath].append([lastctrl[:],last[:],params[:2]]) + last = params[-2:] + lastctrl = params[2:4] + elif cmd == 'Q': + q0=last[:] + q1=params[0:2] + q2=params[2:4] + x0= q0[0] + x1=1./3*q0[0]+2./3*q1[0] + x2= 2./3*q1[0]+1./3*q2[0] + x3= q2[0] + y0= q0[1] + y1=1./3*q0[1]+2./3*q1[1] + y2= 2./3*q1[1]+1./3*q2[1] + y3= q2[1] + csp[subpath].append([lastctrl[:],[x0,y0],[x1,y1]]) + last = [x3,y3] + lastctrl = [x2,y2] + elif cmd == 'A': + arcp=ArcToPath(last[:],params[:]) + arcp[ 0][0]=lastctrl[:] + last=arcp[-1][1] + lastctrl = arcp[-1][0] + csp[subpath]+=arcp[:-1] + elif cmd == 'Z': + csp[subpath].append([lastctrl[:],last[:],last[:]]) + last = subpathstart[:] + lastctrl = subpathstart[:] + #append final superpoint + csp[subpath].append([lastctrl[:],last[:],last[:]]) + return csp + +def unCubicSuperPath(csp): + a = [] + for subpath in csp: + if subpath: + a.append(['M',subpath[0][1][:]]) + for i in range(1,len(subpath)): + a.append(['C',subpath[i-1][2][:] + subpath[i][0][:] + subpath[i][1][:]]) + return a + +def parsePath(d): + return CubicSuperPath(simplepath.parsePath(d)) + +def formatPath(p): + return simplepath.formatPath(unCubicSuperPath(p)) + + +# vim: expandtab shiftwidth=4 tabstop=8 softtabstop=4 fileencoding=utf-8 textwidth=99
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/printrun-src/printrun/svg2gcode/ffgeom.py Fri Jun 03 09:42:44 2016 +0200 @@ -0,0 +1,141 @@ +#!/usr/bin/env python +""" + ffgeom.py + Copyright (C) 2005 Aaron Cyril Spike, aaron@ekips.org + + This file is part of FretFind 2-D. + + FretFind 2-D is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + FretFind 2-D is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with FretFind 2-D; if not, write to the Free Software + Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA +""" +import math +try: + NaN = float('NaN') +except ValueError: + PosInf = 1e300000 + NaN = PosInf/PosInf + +class Point: + precision = 5 + def __init__(self, x, y): + self.__coordinates = {'x' : float(x), 'y' : float(y)} + def __getitem__(self, key): + return self.__coordinates[key] + def __setitem__(self, key, value): + self.__coordinates[key] = float(value) + def __repr__(self): + return '(%s, %s)' % (round(self['x'],self.precision),round(self['y'],self.precision)) + def copy(self): + return Point(self['x'],self['y']) + def translate(self, x, y): + self['x'] += x + self['y'] += y + def move(self, x, y): + self['x'] = float(x) + self['y'] = float(y) + +class Segment: + def __init__(self, e0, e1): + self.__endpoints = [e0, e1] + def __getitem__(self, key): + return self.__endpoints[key] + def __setitem__(self, key, value): + self.__endpoints[key] = value + def __repr__(self): + return repr(self.__endpoints) + def copy(self): + return Segment(self[0],self[1]) + def translate(self, x, y): + self[0].translate(x,y) + self[1].translate(x,y) + def move(self,e0,e1): + self[0] = e0 + self[1] = e1 + def delta_x(self): + return self[1]['x'] - self[0]['x'] + def delta_y(self): + return self[1]['y'] - self[0]['y'] + #alias functions + run = delta_x + rise = delta_y + def slope(self): + if self.delta_x() != 0: + return self.delta_x() / self.delta_y() + return NaN + def intercept(self): + if self.delta_x() != 0: + return self[1]['y'] - (self[0]['x'] * self.slope()) + return NaN + def distanceToPoint(self, p): + s2 = Segment(self[0],p) + c1 = dot(s2,self) + if c1 <= 0: + return Segment(p,self[0]).length() + c2 = dot(self,self) + if c2 <= c1: + return Segment(p,self[1]).length() + return self.perpDistanceToPoint(p) + def perpDistanceToPoint(self, p): + len = self.length() + if len == 0: return NaN + return math.fabs(((self[1]['x'] - self[0]['x']) * (self[0]['y'] - p['y'])) - \ + ((self[0]['x'] - p['x']) * (self[1]['y'] - self[0]['y']))) / len + def angle(self): + return math.pi * (math.atan2(self.delta_y(), self.delta_x())) / 180 + def length(self): + return math.sqrt((self.delta_x() ** 2) + (self.delta_y() ** 2)) + def pointAtLength(self, len): + if self.length() == 0: return Point(NaN, NaN) + ratio = len / self.length() + x = self[0]['x'] + (ratio * self.delta_x()) + y = self[0]['y'] + (ratio * self.delta_y()) + return Point(x, y) + def pointAtRatio(self, ratio): + if self.length() == 0: return Point(NaN, NaN) + x = self[0]['x'] + (ratio * self.delta_x()) + y = self[0]['y'] + (ratio * self.delta_y()) + return Point(x, y) + def createParallel(self, p): + return Segment(Point(p['x'] + self.delta_x(), p['y'] + self.delta_y()), p) + def intersect(self, s): + return intersectSegments(self, s) + +def intersectSegments(s1, s2): + x1 = s1[0]['x'] + x2 = s1[1]['x'] + x3 = s2[0]['x'] + x4 = s2[1]['x'] + + y1 = s1[0]['y'] + y2 = s1[1]['y'] + y3 = s2[0]['y'] + y4 = s2[1]['y'] + + denom = ((y4 - y3) * (x2 - x1)) - ((x4 - x3) * (y2 - y1)) + num1 = ((x4 - x3) * (y1 - y3)) - ((y4 - y3) * (x1 - x3)) + num2 = ((x2 - x1) * (y1 - y3)) - ((y2 - y1) * (x1 - x3)) + + num = num1 + + if denom != 0: + x = x1 + ((num / denom) * (x2 - x1)) + y = y1 + ((num / denom) * (y2 - y1)) + return Point(x, y) + return Point(NaN, NaN) + +def dot(s1, s2): + return s1.delta_x() * s2.delta_x() + s1.delta_y() * s2.delta_y() + + +# vim: expandtab shiftwidth=4 tabstop=8 softtabstop=4 fileencoding=utf-8 textwidth=99
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/printrun-src/printrun/svg2gcode/shapes.py Fri Jun 03 09:42:44 2016 +0200 @@ -0,0 +1,197 @@ +#!/usr/bin/env python + +import logging +import traceback +import xml.etree.ElementTree as ET +import simplepath +import simpletransform +import cubicsuperpath +import cspsubdiv +from bezmisc import beziersplitatt + + +class svgshape(object): + + def __init__(self, xml_node): + self.xml_node = xml_node + + def d_path(self): + raise NotImplementedError + + def transformation_matrix(self): + t = self.xml_node.get('transform') + return simpletransform.parseTransform(t) if t is not None else None + + def svg_path(self): + return "<path d=\"" + self.d_path() + "\"/>" + + def __str__(self): + return self.xml_node + +class path(svgshape): + def __init__(self, xml_node): + super(path, self).__init__(xml_node) + + if not self.xml_node == None: + path_el = self.xml_node + self.d = path_el.get('d') + else: + self.d = None + logging.error("path: Unable to get the attributes for %s", self.xml_node) + + def d_path(self): + return self.d + +class rect(svgshape): + + def __init__(self, xml_node): + super(rect, self).__init__(xml_node) + + if not self.xml_node == None: + rect_el = self.xml_node + self.x = float(rect_el.get('x')) if rect_el.get('x') else 0 + self.y = float(rect_el.get('y')) if rect_el.get('y') else 0 + self.rx = float(rect_el.get('rx')) if rect_el.get('rx') else 0 + self.ry = float(rect_el.get('ry')) if rect_el.get('ry') else 0 + self.width = float(rect_el.get('width')) if rect_el.get('width') else 0 + self.height = float(rect_el.get('height')) if rect_el.get('height') else 0 + else: + self.x = self.y = self.rx = self.ry = self.width = self.height = 0 + logging.error("rect: Unable to get the attributes for %s", self.xml_node) + + def d_path(self): + a = list() + a.append( ['M ', [self.x, self.y]] ) + a.append( [' l ', [self.width, 0]] ) + a.append( [' l ', [0, self.height]] ) + a.append( [' l ', [-self.width, 0]] ) + #a.append( [' l ', [self.x, self.y]] ) # CLOSE RECTANGLE! + a.append( [' Z', []] ) + return simplepath.formatPath(a) + +class ellipse(svgshape): + + def __init__(self, xml_node): + super(ellipse, self).__init__(xml_node) + + if not self.xml_node == None: + ellipse_el = self.xml_node + self.cx = float(ellipse_el.get('cx')) if ellipse_el.get('cx') else 0 + self.cy = float(ellipse_el.get('cy')) if ellipse_el.get('cy') else 0 + self.rx = float(ellipse_el.get('rx')) if ellipse_el.get('rx') else 0 + self.ry = float(ellipse_el.get('ry')) if ellipse_el.get('ry') else 0 + else: + self.cx = self.cy = self.rx = self.ry = 0 + logging.error("ellipse: Unable to get the attributes for %s", self.xml_node) + + def d_path(self): + x1 = self.cx - self.rx + x2 = self.cx + self.rx + p = 'M %f,%f ' % ( x1, self.cy ) + \ + 'A %f,%f ' % ( self.rx, self.ry ) + \ + '0 1 0 %f,%f ' % ( x2, self.cy ) + \ + 'A %f,%f ' % ( self.rx, self.ry ) + \ + '0 1 0 %f,%f' % ( x1, self.cy ) + return p + +class circle(ellipse): + def __init__(self, xml_node): + super(ellipse, self).__init__(xml_node) + + if not self.xml_node == None: + circle_el = self.xml_node + self.cx = float(circle_el.get('cx')) if circle_el.get('cx') else 0 + self.cy = float(circle_el.get('cy')) if circle_el.get('cy') else 0 + self.rx = float(circle_el.get('r')) if circle_el.get('r') else 0 + self.ry = self.rx + else: + self.cx = self.cy = self.r = 0 + logging.error("Circle: Unable to get the attributes for %s", self.xml_node) + +class line(svgshape): + + def __init__(self, xml_node): + super(line, self).__init__(xml_node) + + if not self.xml_node == None: + line_el = self.xml_node + self.x1 = float(line_el.get('x1')) if line_el.get('x1') else 0 + self.y1 = float(line_el.get('y1')) if line_el.get('y1') else 0 + self.x2 = float(line_el.get('x2')) if line_el.get('x2') else 0 + self.y2 = float(line_el.get('y2')) if line_el.get('y2') else 0 + else: + self.x1 = self.y1 = self.x2 = self.y2 = 0 + logging.error("line: Unable to get the attributes for %s", self.xml_node) + + def d_path(self): + a = [] + a.append( ['M ', [self.x1, self.y1]] ) + a.append( ['L ', [self.x2, self.y2]] ) + return simplepath.formatPath(a) + +class polycommon(svgshape): + + def __init__(self, xml_node, polytype): + super(polycommon, self).__init__(xml_node) + self.points = list() + + if not self.xml_node == None: + polycommon_el = self.xml_node + points = polycommon_el.get('points') if polycommon_el.get('points') else list() + points = points.split() + for pa in points: + self.points.append(pa) + if polycommon_el.get('fill'): + # Append first point to close shape + #self.points.append(points[0]) + print repr(self.points) + else: + logging.error("polycommon: Unable to get the attributes for %s", self.xml_node) + + +class polygon(polycommon): + + def __init__(self, xml_node): + super(polygon, self).__init__(xml_node, 'polygon') + + def d_path(self): + d = "M " + self.points[0] + for i in range( 1, len(self.points) ): + d += " L " + self.points[i] + d += " Z" + return d + +class polyline(polycommon): + + def __init__(self, xml_node): + super(polyline, self).__init__(xml_node, 'polyline') + + def d_path(self): + d = "M " + self.points[0] + for i in range( 1, len(self.points) ): + d += " L " + self.points[i] + return d + +def point_generator(path, mat, flatness): + simple_path = simplepath.parsePath(path) + + if len(simple_path) == 0: + return + + startX,startY = float(simple_path[0][1][0]), float(simple_path[0][1][1]) + yield startX, startY, False + + p = cubicsuperpath.parsePath(path) + + if mat: + simpletransform.applyTransformToPath(mat, p) + + for sp in p: + cspsubdiv.subdiv( sp, flatness) + pen = False + for csp in sp: + ctrl_pt1 = csp[0] + ctrl_pt2 = csp[1] + end_pt = csp[2] + yield end_pt[0], end_pt[1], pen + if not pen: pen = True
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/printrun-src/printrun/svg2gcode/simplepath.py Fri Jun 03 09:42:44 2016 +0200 @@ -0,0 +1,202 @@ +#!/usr/bin/env python +""" +simplepath.py +functions for digesting paths into a simple list structure + +Copyright (C) 2005 Aaron Spike, aaron@ekips.org + +This program is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program; if not, write to the Free Software +Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + +""" +import re, math + +def lexPath(d): + """ + returns and iterator that breaks path data + identifies command and parameter tokens + """ + offset = 0 + length = len(d) + delim = re.compile(r'[ \t\r\n,]+') + command = re.compile(r'[MLHVCSQTAZmlhvcsqtaz]') + parameter = re.compile(r'(([-+]?[0-9]+(\.[0-9]*)?|[-+]?\.[0-9]+)([eE][-+]?[0-9]+)?)') + while 1: + m = delim.match(d, offset) + if m: + offset = m.end() + if offset >= length: + break + m = command.match(d, offset) + if m: + yield [d[offset:m.end()], True] + offset = m.end() + continue + m = parameter.match(d, offset) + if m: + yield [d[offset:m.end()], False] + offset = m.end() + continue + #TODO: create new exception + raise Exception, 'Invalid path data!' +''' +pathdefs = {commandfamily: + [ + implicitnext, + #params, + [casts,cast,cast], + [coord type,x,y,0] + ]} +''' +pathdefs = { + 'M':['L', 2, [float, float], ['x','y']], + 'L':['L', 2, [float, float], ['x','y']], + 'H':['H', 1, [float], ['x']], + 'V':['V', 1, [float], ['y']], + 'C':['C', 6, [float, float, float, float, float, float], ['x','y','x','y','x','y']], + 'S':['S', 4, [float, float, float, float], ['x','y','x','y']], + 'Q':['Q', 4, [float, float, float, float], ['x','y','x','y']], + 'T':['T', 2, [float, float], ['x','y']], + 'A':['A', 7, [float, float, float, int, int, float, float], [0,0,0,0,0,'x','y']], + 'Z':['L', 0, [], []] + } +def parsePath(d): + """ + Parse SVG path and return an array of segments. + Removes all shorthand notation. + Converts coordinates to absolute. + """ + retval = [] + lexer = lexPath(d) + + pen = (0.0,0.0) + subPathStart = pen + lastControl = pen + lastCommand = '' + + while 1: + try: + token, isCommand = lexer.next() + except StopIteration: + break + params = [] + needParam = True + if isCommand: + if not lastCommand and token.upper() != 'M': + raise Exception, 'Invalid path, must begin with moveto.' + else: + command = token + else: + #command was omited + #use last command's implicit next command + needParam = False + if lastCommand: + if lastCommand.isupper(): + command = pathdefs[lastCommand][0] + else: + command = pathdefs[lastCommand.upper()][0].lower() + else: + raise Exception, 'Invalid path, no initial command.' + numParams = pathdefs[command.upper()][1] + while numParams > 0: + if needParam: + try: + token, isCommand = lexer.next() + if isCommand: + raise Exception, 'Invalid number of parameters' + except StopIteration: + raise Exception, 'Unexpected end of path' + cast = pathdefs[command.upper()][2][-numParams] + param = cast(token) + if command.islower(): + if pathdefs[command.upper()][3][-numParams]=='x': + param += pen[0] + elif pathdefs[command.upper()][3][-numParams]=='y': + param += pen[1] + params.append(param) + needParam = True + numParams -= 1 + #segment is now absolute so + outputCommand = command.upper() + + #Flesh out shortcut notation + if outputCommand in ('H','V'): + if outputCommand == 'H': + params.append(pen[1]) + if outputCommand == 'V': + params.insert(0,pen[0]) + outputCommand = 'L' + if outputCommand in ('S','T'): + params.insert(0,pen[1]+(pen[1]-lastControl[1])) + params.insert(0,pen[0]+(pen[0]-lastControl[0])) + if outputCommand == 'S': + outputCommand = 'C' + if outputCommand == 'T': + outputCommand = 'Q' + + #current values become "last" values + if outputCommand == 'M': + subPathStart = tuple(params[0:2]) + pen = subPathStart + if outputCommand == 'Z': + pen = subPathStart + else: + pen = tuple(params[-2:]) + + if outputCommand in ('Q','C'): + lastControl = tuple(params[-4:-2]) + else: + lastControl = pen + lastCommand = command + + retval.append([outputCommand,params]) + return retval + +def formatPath(a): + """Format SVG path data from an array""" + return "".join([cmd + " ".join([str(p) for p in params]) for cmd, params in a]) + +def translatePath(p, x, y): + for cmd,params in p: + defs = pathdefs[cmd] + for i in range(defs[1]): + if defs[3][i] == 'x': + params[i] += x + elif defs[3][i] == 'y': + params[i] += y + +def scalePath(p, x, y): + for cmd,params in p: + defs = pathdefs[cmd] + for i in range(defs[1]): + if defs[3][i] == 'x': + params[i] *= x + elif defs[3][i] == 'y': + params[i] *= y + +def rotatePath(p, a, cx = 0, cy = 0): + if a == 0: + return p + for cmd,params in p: + defs = pathdefs[cmd] + for i in range(defs[1]): + if defs[3][i] == 'x': + x = params[i] - cx + y = params[i + 1] - cy + r = math.sqrt((x**2) + (y**2)) + if r != 0: + theta = math.atan2(y, x) + a + params[i] = (r * math.cos(theta)) + cx + params[i + 1] = (r * math.sin(theta)) + cy +
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/printrun-src/printrun/svg2gcode/simpletransform.py Fri Jun 03 09:42:44 2016 +0200 @@ -0,0 +1,241 @@ +#!/usr/bin/env python +''' +Copyright (C) 2006 Jean-Francois Barraud, barraud@math.univ-lille1.fr +Copyright (C) 2010 Alvin Penner, penner@vaxxine.com + +This program is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program; if not, write to the Free Software +Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA +barraud@math.univ-lille1.fr + +This code defines several functions to make handling of transform +attribute easier. +''' +import cubicsuperpath, bezmisc +import copy, math, re + +def parseTransform(transf,mat=[[1.0, 0.0, 0.0], [0.0, 1.0, 0.0]]): + if transf=="" or transf==None: + return(mat) + stransf = transf.strip() + result=re.match("(translate|scale|rotate|skewX|skewY|matrix)\s*\(([^)]*)\)\s*,?",stransf) +#-- translate -- + if result.group(1)=="translate": + args=result.group(2).replace(',',' ').split() + dx=float(args[0]) + if len(args)==1: + dy=0.0 + else: + dy=float(args[1]) + matrix=[[1,0,dx],[0,1,dy]] +#-- scale -- + if result.group(1)=="scale": + args=result.group(2).replace(',',' ').split() + sx=float(args[0]) + if len(args)==1: + sy=sx + else: + sy=float(args[1]) + matrix=[[sx,0,0],[0,sy,0]] +#-- rotate -- + if result.group(1)=="rotate": + args=result.group(2).replace(',',' ').split() + a=float(args[0])*math.pi/180 + if len(args)==1: + cx,cy=(0.0,0.0) + else: + cx,cy=map(float,args[1:]) + matrix=[[math.cos(a),-math.sin(a),cx],[math.sin(a),math.cos(a),cy]] + matrix=composeTransform(matrix,[[1,0,-cx],[0,1,-cy]]) +#-- skewX -- + if result.group(1)=="skewX": + a=float(result.group(2))*math.pi/180 + matrix=[[1,math.tan(a),0],[0,1,0]] +#-- skewY -- + if result.group(1)=="skewY": + a=float(result.group(2))*math.pi/180 + matrix=[[1,0,0],[math.tan(a),1,0]] +#-- matrix -- + if result.group(1)=="matrix": + a11,a21,a12,a22,v1,v2=result.group(2).replace(',',' ').split() + matrix=[[float(a11),float(a12),float(v1)], [float(a21),float(a22),float(v2)]] + + matrix=composeTransform(mat,matrix) + if result.end() < len(stransf): + return(parseTransform(stransf[result.end():], matrix)) + else: + return matrix + +def formatTransform(mat): + return ("matrix(%f,%f,%f,%f,%f,%f)" % (mat[0][0], mat[1][0], mat[0][1], mat[1][1], mat[0][2], mat[1][2])) + +def composeTransform(M1,M2): + a11 = M1[0][0]*M2[0][0] + M1[0][1]*M2[1][0] + a12 = M1[0][0]*M2[0][1] + M1[0][1]*M2[1][1] + a21 = M1[1][0]*M2[0][0] + M1[1][1]*M2[1][0] + a22 = M1[1][0]*M2[0][1] + M1[1][1]*M2[1][1] + + v1 = M1[0][0]*M2[0][2] + M1[0][1]*M2[1][2] + M1[0][2] + v2 = M1[1][0]*M2[0][2] + M1[1][1]*M2[1][2] + M1[1][2] + return [[a11,a12,v1],[a21,a22,v2]] + +def composeParents(node, mat): + trans = node.get('transform') + if trans: + mat = composeTransform(parseTransform(trans), mat) + if node.getparent().tag == inkex.addNS('g','svg'): + mat = composeParents(node.getparent(), mat) + return mat + +def applyTransformToNode(mat,node): + m=parseTransform(node.get("transform")) + newtransf=formatTransform(composeTransform(mat,m)) + node.set("transform", newtransf) + +def applyTransformToPoint(mat,pt): + x = mat[0][0]*pt[0] + mat[0][1]*pt[1] + mat[0][2] + y = mat[1][0]*pt[0] + mat[1][1]*pt[1] + mat[1][2] + pt[0]=x + pt[1]=y + +def applyTransformToPath(mat,path): + for comp in path: + for ctl in comp: + for pt in ctl: + applyTransformToPoint(mat,pt) + +def fuseTransform(node): + if node.get('d')==None: + #FIXME: how do you raise errors? + raise AssertionError, 'can not fuse "transform" of elements that have no "d" attribute' + t = node.get("transform") + if t == None: + return + m = parseTransform(t) + d = node.get('d') + p = cubicsuperpath.parsePath(d) + applyTransformToPath(m,p) + node.set('d', cubicsuperpath.formatPath(p)) + del node.attrib["transform"] + +#################################################################### +##-- Some functions to compute a rough bbox of a given list of objects. +##-- this should be shipped out in an separate file... + +def boxunion(b1,b2): + if b1 is None: + return b2 + elif b2 is None: + return b1 + else: + return((min(b1[0],b2[0]), max(b1[1],b2[1]), min(b1[2],b2[2]), max(b1[3],b2[3]))) + +def roughBBox(path): + xmin,xMax,ymin,yMax = path[0][0][0][0],path[0][0][0][0],path[0][0][0][1],path[0][0][0][1] + for pathcomp in path: + for ctl in pathcomp: + for pt in ctl: + xmin = min(xmin,pt[0]) + xMax = max(xMax,pt[0]) + ymin = min(ymin,pt[1]) + yMax = max(yMax,pt[1]) + return xmin,xMax,ymin,yMax + +def refinedBBox(path): + xmin,xMax,ymin,yMax = path[0][0][1][0],path[0][0][1][0],path[0][0][1][1],path[0][0][1][1] + for pathcomp in path: + for i in range(1, len(pathcomp)): + cmin, cmax = cubicExtrema(pathcomp[i-1][1][0], pathcomp[i-1][2][0], pathcomp[i][0][0], pathcomp[i][1][0]) + xmin = min(xmin, cmin) + xMax = max(xMax, cmax) + cmin, cmax = cubicExtrema(pathcomp[i-1][1][1], pathcomp[i-1][2][1], pathcomp[i][0][1], pathcomp[i][1][1]) + ymin = min(ymin, cmin) + yMax = max(yMax, cmax) + return xmin,xMax,ymin,yMax + +def cubicExtrema(y0, y1, y2, y3): + cmin = min(y0, y3) + cmax = max(y0, y3) + d1 = y1 - y0 + d2 = y2 - y1 + d3 = y3 - y2 + if (d1 - 2*d2 + d3): + if (d2*d2 > d1*d3): + t = (d1 - d2 + math.sqrt(d2*d2 - d1*d3))/(d1 - 2*d2 + d3) + if (t > 0) and (t < 1): + y = y0*(1-t)*(1-t)*(1-t) + 3*y1*t*(1-t)*(1-t) + 3*y2*t*t*(1-t) + y3*t*t*t + cmin = min(cmin, y) + cmax = max(cmax, y) + t = (d1 - d2 - math.sqrt(d2*d2 - d1*d3))/(d1 - 2*d2 + d3) + if (t > 0) and (t < 1): + y = y0*(1-t)*(1-t)*(1-t) + 3*y1*t*(1-t)*(1-t) + 3*y2*t*t*(1-t) + y3*t*t*t + cmin = min(cmin, y) + cmax = max(cmax, y) + elif (d3 - d1): + t = -d1/(d3 - d1) + if (t > 0) and (t < 1): + y = y0*(1-t)*(1-t)*(1-t) + 3*y1*t*(1-t)*(1-t) + 3*y2*t*t*(1-t) + y3*t*t*t + cmin = min(cmin, y) + cmax = max(cmax, y) + return cmin, cmax + +def computeBBox(aList,mat=[[1,0,0],[0,1,0]]): + bbox=None + for node in aList: + m = parseTransform(node.get('transform')) + m = composeTransform(mat,m) + #TODO: text not supported! + d = None + if node.get("d"): + d = node.get('d') + elif node.get('points'): + d = 'M' + node.get('points') + elif node.tag in [ inkex.addNS('rect','svg'), 'rect', inkex.addNS('image','svg'), 'image' ]: + d = 'M' + node.get('x', '0') + ',' + node.get('y', '0') + \ + 'h' + node.get('width') + 'v' + node.get('height') + \ + 'h-' + node.get('width') + elif node.tag in [ inkex.addNS('line','svg'), 'line' ]: + d = 'M' + node.get('x1') + ',' + node.get('y1') + \ + ' ' + node.get('x2') + ',' + node.get('y2') + elif node.tag in [ inkex.addNS('circle','svg'), 'circle', \ + inkex.addNS('ellipse','svg'), 'ellipse' ]: + rx = node.get('r') + if rx is not None: + ry = rx + else: + rx = node.get('rx') + ry = node.get('ry') + cx = float(node.get('cx', '0')) + cy = float(node.get('cy', '0')) + x1 = cx - float(rx) + x2 = cx + float(rx) + d = 'M %f %f ' % (x1, cy) + \ + 'A' + rx + ',' + ry + ' 0 1 0 %f,%f' % (x2, cy) + \ + 'A' + rx + ',' + ry + ' 0 1 0 %f,%f' % (x1, cy) + + if d is not None: + p = cubicsuperpath.parsePath(d) + applyTransformToPath(m,p) + bbox=boxunion(refinedBBox(p),bbox) + + elif node.tag == inkex.addNS('use','svg') or node.tag=='use': + refid=node.get(inkex.addNS('href','xlink')) + path = '//*[@id="%s"]' % refid[1:] + refnode = node.xpath(path) + bbox=boxunion(computeBBox(refnode,m),bbox) + + bbox=boxunion(computeBBox(node,m),bbox) + return bbox + + +# vim: expandtab shiftwidth=4 tabstop=8 softtabstop=4 fileencoding=utf-8 textwidth=99
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/printrun-src/printrun/svg2gcode/svg2gcode.py Fri Jun 03 09:42:44 2016 +0200 @@ -0,0 +1,61 @@ +#!/usr/bin/env python + +import sys +import xml.etree.ElementTree as ET +import shapes as shapes_pkg +from shapes import point_generator +from config import * + +def generate_gcode(): + svg_shapes = set(['rect', 'circle', 'ellipse', 'line', 'polyline', 'polygon', 'path']) + + tree = ET.parse(sys.stdin) + root = tree.getroot() + + width = root.get('width') + height = root.get('height') + if width == None or height == None: + viewbox = root.get('viewBox') + if viewbox: + _, _, width, height = viewbox.split() + + if width == None or height == None: + print "Unable to get width and height for the svg" + sys.exit(1) + + width = float(width) + height = float(height) + + scale_x = bed_max_x / max(width, height) + scale_y = bed_max_y / max(width, height) + + print preamble + + for elem in root.iter(): + + try: + _, tag_suffix = elem.tag.split('}') + except ValueError: + continue + + if tag_suffix in svg_shapes: + shape_class = getattr(shapes_pkg, tag_suffix) + shape_obj = shape_class(elem) + d = shape_obj.d_path() + m = shape_obj.transformation_matrix() + + if d: + print shape_preamble + p = point_generator(d, m, smoothness) + for x,y in p: + if x > 0 and x < bed_max_x and y > 0 and y < bed_max_y: + print "G1 X%0.1f Y%0.1f" % (scale_x*x, scale_y*y) + print shape_postamble + + print postamble + +if __name__ == "__main__": + generate_gcode() + + +
