def saveDXF(self, filename): try: dxf = DXF(filename,"w") except: return False dxf.writeHeader() for block in self.blocks: name = block.name() for line in block: cmds = self.cnc.parseLine(line) if cmds is None: continue self.cnc.processPath(cmds) if self.cnc.gcode == 1: # line dxf.line(self.cnc.x, self.cnc.y, self.cnc.xval, self.cnc.yval, name) elif self.cnc.gcode in (2,3): # arc xc,yc,zc = self.cnc.motionCenter() sphi = math.atan2(self.cnc.y-yc, self.cnc.x-xc) ephi = math.atan2(self.cnc.yval-yc, self.cnc.xval-xc) if self.cnc.gcode==2: if ephi<=sphi+1e-10: ephi += 2.0*math.pi dxf.arc(xc,yc,self.cnc.rval, math.degrees(ephi), math.degrees(sphi),name) else: if ephi<=sphi+1e-10: ephi += 2.0*math.pi dxf.arc(xc,yc,self.cnc.rval, math.degrees(sphi), math.degrees(ephi),name) self.cnc.motionPathEnd() dxf.writeEOF() dxf.close() return True
def loadDXF(self, filename): try: dxf = DXF(filename,"r") except: return False dxf.readFile() dxf.close() for name in dxf.layers.keys(): layer = dxf.sortLayer(name) path = Path(name) path.fromLayer(layer) path.removeZeroLength() opath = path.order() changed = True while changed: longest = opath[0] for p in opath: if longest.length() > p.length(): longest = p opath.remove(longest) changed = longest.mergeLoops(opath) self.fromPath(longest) self.fromPath(opath) return True
# generate a point on the curve
for j in range(1, 4):
jcount = j
p[icount + j] = 0.0
# Do local matrix multiplication
for i in range(1, npts + 1):
p[icount + j] += nbasis[i] * b[jcount]
jcount += 3
icount += 3
t += step
# =============================================================================
if __name__ == "__main__":
SPLINE_SEGMENTS = 20
from dxf import DXF
# from dxfwrite.algebra import CubicSpline, CubicBezierCurve
dxf = DXF(sys.argv[1], "r")
dxf.readFile()
dxf.close()
for name, layer in dxf.layers.items():
for entity in layer.entities:
if entity.type == "SPLINE":
xy = zip(entity[10], entity[20])
x, y = spline2Polyline(xy, int(entity[71]), True,
SPLINE_SEGMENTS)
#for a,b in zip(x,y):
# print a,b
# generate the basis function for this value of t rbasis(k,t,npts,x,h,nbasis) # generate a point on the curve for j in range(1,4): jcount = j p[icount+j] = 0.0 # Do local matrix multiplication for i in range(1,npts+1): p[icount+j] += nbasis[i]*b[jcount] jcount += 3 icount += 3 t += step # ============================================================================= if __name__ == "__main__": SPLINE_SEGMENTS = 20 from dxf import DXF # from dxfwrite.algebra import CubicSpline, CubicBezierCurve dxf = DXF(sys.argv[1],"r") dxf.readFile() dxf.close() for name,layer in dxf.layers.items(): for entity in layer.entities: if entity.type == "SPLINE": xy = zip(entity[10], entity[20]) x,y = spline2Polyline(xy, int(entity[71]), True, SPLINE_SEGMENTS) #for a,b in zip(x,y): # print a,b