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support for ellipses and elliptical arcs in flattened SVG output

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(cherry picked from commit 59eabdbcb043f3d462c3e9ed0ba21cfe65b7aae6)
This commit is contained in:
Sebastian Hoogen 2014-10-17 13:12:39 +02:00 committed by wmayer
parent f5df65c4c4
commit dc5c64703a
1 changed files with 43 additions and 12 deletions
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55
src/Mod/Draft/Draft.py
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@ -1747,25 +1747,56 @@ def getSVG(obj,scale=1,linewidth=0.35,fontsize=12,fillstyle="shape color",direct
egroups.append(w.Edges)
for g in egroups:
edges = DraftGeomUtils.sortEdges(g)
v = getProj(edges[0].Vertexes[0].Point)
e0=edges[0]
v = getProj(e0.Vertexes[-1*(e0.Orientation=="Reversed")].Point)
svg += 'M '+ str(v.x) +' '+ str(v.y) + ' '
for e in edges:
if DraftGeomUtils.geomType(e) == "Circle":
if len(e.Vertexes) == 1:
# complete circle
if e.Orientation == "Forward":
vs = e.Vertexes
else:
vs = e.Vertexes[::-1]
iscircle = DraftGeomUtils.geomType(e) == "Circle"
isellipse = DraftGeomUtils.geomType(e) == "Ellipse"
if iscircle or isellipse:
c = e.Curve
if len(e.Vertexes) == 1 and iscircle: #complete curve
svg = getCircle(e)
return svg
r = e.Curve.Radius
elif len(e.Vertexes) == 1 and isellipse:
endpoints = (getProj(c.value((c.LastParameter-\
c.FirstParameter)/2.0)), \
getProj(vs[-1].Point))
else:
endpoints = (getProj(vs[-1].Point),)
# arc
if iscircle:
rx = ry = c.Radius
rot = 0
else: #ellipse
import math
rx = c.MajorRadius
ry = c.MinorRadius
rot = math.degrees(c.AngleXU * (c.Axis * \
FreeCAD.Vector(0,0,1)))
if rot > 90:
rot -=180
if rot < -90:
rot += 180
#be carefull with the sweep flag
drawing_plane_normal = FreeCAD.DraftWorkingPlane.axis
if plane: drawing_plane_normal = plane.axis
flag_large_arc = (((e.ParameterRange[1] - e.ParameterRange[0]) / math.pi) % 2) > 1
flag_sweep = e.Curve.Axis * drawing_plane_normal >= 0
v = getProj(e.Vertexes[-1].Point)
svg += 'A ' + str(r) + ' ' + str(r) + ' '
svg += '0 ' + str(int(flag_large_arc)) + ' ' + str(int(flag_sweep)) + ' '
svg += str(v.x) + ' ' + str(v.y) + ' '
flag_large_arc = (((e.ParameterRange[1] - \
e.ParameterRange[0]) / math.pi) % 2) > 1
flag_sweep = (c.Axis * drawing_plane_normal >= 0) \
== (e.Orientation == "Forward")
for v in endpoints:
svg += 'A %s %s %s %s %s %s %s ' % \
(str(rx),str(ry),str(rot),\
str(int(flag_large_arc)),\
str(int(flag_sweep)),str(v.x),str(v.y))
elif DraftGeomUtils.geomType(e) == "Line":
v = getProj(e.Vertexes[-1].Point)
v = getProj(vs[-1].Point)
svg += 'L '+ str(v.x) +' '+ str(v.y) + ' '
else:
bspline=e.Curve.toBSpline(e.FirstParameter,e.LastParameter)