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# SPDX-License-Identifier: GPL-2.0-or-later
from .base_exporter import BasePrimitiveDXFExporter
class CurveDXFExporter(BasePrimitiveDXFExporter):
pass
#-----------------------------------------------------
def exportCurve(ob, mx, mw, **common):
"""converts Curve-Object to desired projection and representation(DXF-Entity type)
"""
entities = []
block = None
curve = ob.getData()
#print 'deb: curve=', dir(curve) #---------
# TODO: should be: if curve.users>1 and not (PERSPECTIVE or (PROJECTION and HIDDEN_MODE):
if INSTANCES and curve.users>1 and not PROJECTION:
if curve.name in BLOCKREGISTRY.keys():
insert_name = BLOCKREGISTRY[curve.name]
# write INSERT to entities
entities = exportInsert(ob, mx,insert_name, **common)
else:
# generate geom_output in ObjectCS
imx = mathutils.Matrix().identity()
WCS_loc = [0,0,0] # WCS_loc is object location in WorldCoordSystem
#print 'deb: WCS_loc=', WCS_loc #---------
sizeX = sizeY = sizeZ = 1.0
rotX = rotY = rotZ = 0.0
Thickness,Extrusion,ZRotation,Elevation = None,None,None,None
ZRotation,Zrotmatrix,OCS_origin,ECS_origin = None,None,None,None
AXaxis = imx[0].copy().resize3D() # = ArbitraryXvector
OCS_origin = [0,0,0]
if not PROJECTION:
#Extrusion, ZRotation, Elevation = getExtrusion(mx)
Extrusion, AXaxis = getExtrusion(imx)
# no thickness/width for POLYLINEs converted into Screen-C-S
#print 'deb: curve.ext1=', curve.ext1 #---------
if curve.ext1: Thickness = curve.ext1 * sizeZ
if curve.ext2 and sizeX==sizeY:
Width = curve.ext2 * sizeX
if "POLYLINE"==curve_as_list[GUI_A['curve_as'].val]: # export as POLYLINE
ZRotation,Zrotmatrix,OCS_origin,ECS_origin = getTargetOrientation(imx,Extrusion,\
AXaxis,WCS_loc,sizeX,sizeY,sizeZ,rotX,rotY,rotZ)
entities = writeCurveEntities(curve, imx,
Thickness,Extrusion,ZRotation,Elevation,AXaxis,Zrotmatrix,
WCS_loc,OCS_origin,ECS_origin,sizeX,sizeY,sizeZ,
**common)
if entities: # if not empty block
# write BLOCK definition and INSERT entity
# BLOCKREGISTRY = dictionary 'blender_name':'dxf_name'.append(me.name)
BLOCKREGISTRY[curve.name]=validDXFr12name(('CU_'+ curve.name))
insert_name = BLOCKREGISTRY[curve.name]
block = DXF.Block(insert_name,flag=0,base=(0,0,0),entities=entities)
# write INSERT as entity
entities = exportInsert(ob, mx, insert_name, **common)
else: # no other instances, so go the standard way
WCS_loc = ob.loc # WCS_loc is object location in WorldCoordSystem
#print 'deb: WCS_loc=', WCS_loc #---------
sizeX = ob.SizeX
sizeY = ob.SizeY
sizeZ = ob.SizeZ
rotX = ob.RotX
rotY = ob.RotY
rotZ = ob.RotZ
#print 'deb: sizeX=%s, sizeY=%s' %(sizeX, sizeY) #---------
Thickness,Extrusion,ZRotation,Elevation = None,None,None,None
ZRotation,Zrotmatrix,OCS_origin,ECS_origin = None,None,None,None
AXaxis = mx[0].copy().resize3D() # = ArbitraryXvector
OCS_origin = [0,0,0]
if not PROJECTION:
#Extrusion, ZRotation, Elevation = getExtrusion(mx)
Extrusion, AXaxis = getExtrusion(mx)
# no thickness/width for POLYLINEs converted into Screen-C-S
#print 'deb: curve.ext1=', curve.ext1 #---------
if curve.ext1: Thickness = curve.ext1 * sizeZ
if curve.ext2 and sizeX==sizeY:
Width = curve.ext2 * sizeX
if "POLYLINE"==curve_as_list[GUI_A['curve_as'].val]: # export as POLYLINE
ZRotation,Zrotmatrix,OCS_origin,ECS_origin = getTargetOrientation(mx,Extrusion,\
AXaxis,WCS_loc,sizeX,sizeY,sizeZ,rotX,rotY,rotZ)
entities = writeCurveEntities(curve, mx,
Thickness,Extrusion,ZRotation,Elevation,AXaxis,Zrotmatrix,
WCS_loc,OCS_origin,ECS_origin,sizeX,sizeY,sizeZ,
**common)
return entities, block
#-------------------------------------------------
def writeCurveEntities(curve, mx,
Thickness,Extrusion,ZRotation,Elevation,AXaxis,Zrotmatrix,
WCS_loc,OCS_origin,ECS_origin,sizeX,sizeY,sizeZ,
**common):
"""help routine for exportCurve()
"""
entities = []
width1,width2 = None, None
if 1:
for cur in curve:
#print 'deb: START cur=', cur #--------------
#print 'deb: dir(curve):',dir(cur) #---------
#print 'deb: curve.type:',cur.type #---------
points = []
flags = []
pflag70, pflag75 = 0,0
if cur.type==4: # is NURBS
#if cur.isNurb():
#print 'deb:isNurb --------------' #---------
pflag70 = 4
orderU = cur.orderU
# curve type:
# 0: curvNoFitted
# 5: curvQuadraticBspline
# 6: curvCubicBspline
# 8: curvBezier
if orderU<=4: pflag75 = 5
elif orderU>=5: pflag75 = 6
vflag70 = 16
i = -2
for point in cur:
#print 'deb:isNurb point=', point #---------
i+=1
if i==orderU-1: i = 0
if i:
flags.append([16, [width1,width2]])
else:
flags.append([8, [width1,width2]])
vec = point[0:3]
#print 'deb: vec=', vec #---------
pkt = mathutils.Vector(vec)
#print 'deb: pkt=', pkt #---------
points.append(pkt)
if not cur.isCyclic():
points = points[1:-1]
flags = flags[1:-1]
elif cur.type==1: # is Bezier
#print 'deb:isBezier --------------' #---------
pflag75 = 8
vflag70 = 1
for point in cur:
#print 'deb:isBezier point=', point #---------
#print 'deb:isBezier point=', point.getTriple() #---------
ptan1,pfit,ptan2 = point.getTriple()
#print 'deb: point=', pt #---------
ptan1 = mathutils.Vector(ptan1)
pfit = mathutils.Vector(pfit)
ptan2 = mathutils.Vector(ptan2)
#print 'deb: pkt=', pkt #---------
points.append(ptan1)
flags.append([2, [width1,width2]])
points.append(pfit)
flags.append([1, [width1,width2]])
points.append(ptan2)
flags.append([2, [width1,width2]])
if not cur.isCyclic():
points = points[1:-1]
flags = flags[1:-1]
elif cur.type==0: # is Polygon
#print 'deb:isPolygon --------------' #---------
#pflag70 = 4
pflag75 = 0
for point in cur:
#print 'deb:isPoly point=', point #---------
vec = point[0:3]
#print 'deb: vec=', vec #---------
pkt = mathutils.Vector(vec)
#print 'deb: pkt=', pkt #---------
points.append(pkt)
flags.append([None, [width1,width2]])
#print 'deb: points', points #--------------
if len(points)>1:
c = curve_as_list[GUI_A['curve_as'].val]
if c=="POLYLINE": # export Curve as POLYLINE
if not PROJECTION:
# recalculate points(2d=X,Y) into Entity-Coords-System
for p in points: # list of vectors
p[0] *= sizeX
p[1] *= sizeY
p2 = p * Zrotmatrix
p2[0] += ECS_origin[0]
p2[1] += ECS_origin[1]
p[0],p[1] = p2[0],p2[1]
else:
points = projected_co(points, mx)
#print 'deb: points', points #--------------
if cur.isCyclic(): closed = 1
else: closed = 0
points = toGlobalOrigin(points)
points_temp = []
for p,f in zip(points,flags):
points_temp.append([p,f[0],f[1]])
points = points_temp
#print 'deb: points', points #--------------
if DEBUG: curve_drawBlender(points,OCS_origin,closed) #deb: draw to scene
common['extrusion']= Extrusion
##common['rotation']= ZRotation
##common['elevation']= Elevation
common['thickness']= Thickness
#print 'deb: common=', common #------------------
flag70, flag75 = pflag70+closed, pflag75
if 0: #DEBUG
p=AXaxis[:3]
entities.append(DXF.Line([[0,0,0], p],**common))
p=ECS_origin[:3]
entities.append(DXF.Line([[0,0,0], p],**common))
common['color']= 5
p=OCS_origin[:3]
entities.append(DXF.Line([[0,0,0], p],**common))
#OCS_origin=[0,0,0] #only debug----------------
dxfPLINE = DXF.PolyLine(points,OCS_origin, flag70=flag70, flag75=flag70, width=0.0,**common)
entities.append(dxfPLINE)
dxfPLINE = DXF.PolyLine(points,OCS_origin, flag70=flag70, flag75=flag70, width=0.0,**common)
entities.append(dxfPLINE)
if Thickness:
common['thickness']= -Thickness
dxfPLINE = DXF.PolyLine(points,OCS_origin, flag70=flag70, flag75=flag70, width=0.0,**common)
entities.append(dxfPLINE)
elif c=="LINEs": # export Curve as multiple LINEs
points = projected_co(points, mx)
if cur.isCyclic(): points.append(points[0])
#print 'deb: points', points #--------------
points = toGlobalOrigin(points)
if DEBUG: curve_drawBlender(points,WCS_loc,closed) #deb: draw to scene
common['extrusion']= Extrusion
common['elevation']= Elevation
common['thickness']= Thickness
#print 'deb: common=', common #------------------
for i in range(len(points)-1):
linepoints = [points[i], points[i+1]]
dxfLINE = DXF.Line(linepoints,**common)
entities.append(dxfLINE)
if Thickness:
common['thickness']= -Thickness
for i in range(len(points)-1):
linepoints = [points[i], points[i+1]]
dxfLINE = DXF.Line(linepoints,**common)
entities.append(dxfLINE)
elif c=="POINTs": # export Curve as multiple POINTs
points = projected_co(points, mx)
for p in points:
dxfPOINT = DXF.Point(points=[p],**common)
entities.append(dxfPOINT)
return entities
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