Revision: 20789
http://projects.blender.org/plugins/scmsvn/viewcvs.php?view=rev&root=bf-blender&revision=20789
Author: campbellbarton
Date: 2009-06-10 21:14:05 +0200 (Wed, 10 Jun 2009)
Log Message:
-----------
Option to export curves as OBJ native curves (rather then a bunch of edges)
- nurbs and polyline (not bezier)
- closed / open curves
- OrderU works as expected
- Endpoint U works too.
Modified Paths:
--------------
trunk/blender/release/scripts/export_obj.py
Modified: trunk/blender/release/scripts/export_obj.py
===================================================================
--- trunk/blender/release/scripts/export_obj.py 2009-06-10 18:02:54 UTC (rev
20788)
+++ trunk/blender/release/scripts/export_obj.py 2009-06-10 19:14:05 UTC (rev
20789)
@@ -181,12 +181,87 @@
copyCount+=1
print '\tCopied %d images' % copyCount
+
+def test_nurbs_compat(ob):
+ if ob.type != 'Curve':
+ return False
+
+ for nu in ob.data:
+ if (not nu.knotsV) and nu.type != 1: # not a surface and not
bezier
+ return True
+
+ return False
+
+def write_nurb(file, ob, ob_mat):
+ cu = ob.data
+
+ # use negative indices
+ Vector = Blender.Mathutils.Vector
+ for nu in cu:
+
+ if nu.type==0: DEG_ORDER_U = 1
+ else: DEG_ORDER_U = nu.orderU-1 #
Tested to be correct
+
+ if nu.type==1:
+ print "\tWarning, bezier curve:", ob.name, "only poly
and nurbs curves supported"
+ continue
+
+ if nu.knotsV:
+ print "\tWarning, surface:", ob.name, "only poly and
nurbs curves supported"
+ continue
+
+ if len(nu) <= DEG_ORDER_U:
+ print "\tWarning, orderU is lower then vert count,
skipping:", ob.name
+ continue
+
+ pt_num = 0
+ do_closed = (nu.flagU & 1)
+ do_endpoints = (do_closed==0) and (nu.flagU & 2)
+
+ for pt in nu:
+ pt = Vector(pt[0], pt[1], pt[2]) * ob_mat
+ file.write('v %.6f %.6f %.6f\n' % (pt[0], pt[1], pt[2]))
+ pt_num += 1
+
+
+ file.write('g %s\n' % (fixName(ob.name))) #
fixName(ob.getData(1)) could use the data name too
+ file.write('cstype bspline\n') # not ideal, hard coded
+ file.write('deg %d\n' % DEG_ORDER_U) # not used for curves but
most files have it still
+
+ curve_ls = [-(i+1) for i in xrange(pt_num)]
+
+ # 'curv' keyword
+ if do_closed:
+ if DEG_ORDER_U == 1:
+ pt_num += 1
+ curve_ls.append(-1)
+ else:
+ val = DEG_ORDER_U - 1
+ pt_num += val*2
+ curve_ls = curve_ls[-val:] + curve_ls +
curve_ls[0:val] # Blenders OrderU of 3 -> val==1, 4 -> 2 etc
+
+ file.write('curv 0.0 1.0 %s\n' % (' '.join( [str(i) for i in
curve_ls] ))) # Blender has no U and V values for the curve
+
+ # 'parm' keyword
+ tot_parm = (DEG_ORDER_U + 1) + pt_num
+ tot_parm_div = float(tot_parm-1)
+ parm_ls = [(i/tot_parm_div) for i in xrange(tot_parm)]
+
+ if do_endpoints: # end points, force param
+ for i in xrange(DEG_ORDER_U+1):
+ parm_ls[i] = 0.0
+ parm_ls[-(1+i)] = 1.0
+
+ file.write('parm u %s\n' % ' '.join( [str(i) for i in parm_ls]
))
+
+ file.write('end\n')
+
def write(filename, objects,\
EXPORT_TRI=False, EXPORT_EDGES=False, EXPORT_NORMALS=False,
EXPORT_NORMALS_HQ=False,\
EXPORT_UV=True, EXPORT_MTL=True, EXPORT_COPY_IMAGES=False,\
EXPORT_APPLY_MODIFIERS=True, EXPORT_ROTX90=True, EXPORT_BLEN_OBS=True,\
EXPORT_GROUP_BY_OB=False, EXPORT_GROUP_BY_MAT=False,
EXPORT_KEEP_VERT_ORDER=False,\
-EXPORT_POLYGROUPS=False):
+EXPORT_POLYGROUPS=False, EXPORT_CURVE_AS_NURBS=True):
'''
Basic write function. The context and options must be alredy set
This can be accessed externaly
@@ -263,9 +338,21 @@
globalNormals = {}
+
# Get all meshes
for ob_main in objects:
for ob, ob_mat in BPyObject.getDerivedObjects(ob_main):
+
+ # Nurbs curve support
+ if EXPORT_CURVE_AS_NURBS and test_nurbs_compat(ob):
+ if EXPORT_ROTX90:
+ ob_mat = ob_mat * mat_xrot90
+
+ write_nurb(file, ob, ob_mat)
+
+ continue
+ # end nurbs
+
# Will work for non meshes now! :)
# getMeshFromObject(ob, container_mesh=None,
apply_modifiers=True, vgroups=True, scn=None)
me= BPyMesh.getMeshFromObject(ob, containerMesh,
EXPORT_APPLY_MODIFIERS, EXPORT_POLYGROUPS, scn)
@@ -585,7 +672,7 @@
EXPORT_MTL, EXPORT_SEL_ONLY, EXPORT_ALL_SCENES,\
EXPORT_ANIMATION, EXPORT_COPY_IMAGES, EXPORT_BLEN_OBS,\
EXPORT_GROUP_BY_OB, EXPORT_GROUP_BY_MAT,
EXPORT_KEEP_VERT_ORDER,\
- EXPORT_POLYGROUPS
+ EXPORT_POLYGROUPS, EXPORT_CURVE_AS_NURBS
EXPORT_APPLY_MODIFIERS = Draw.Create(0)
EXPORT_ROTX90 = Draw.Create(1)
@@ -604,6 +691,7 @@
EXPORT_GROUP_BY_MAT = Draw.Create(0)
EXPORT_KEEP_VERT_ORDER = Draw.Create(1)
EXPORT_POLYGROUPS = Draw.Create(0)
+ EXPORT_CURVE_AS_NURBS = Draw.Create(1)
# Old UI
@@ -693,7 +781,7 @@
EXPORT_MTL, EXPORT_SEL_ONLY, EXPORT_ALL_SCENES,\
EXPORT_ANIMATION, EXPORT_COPY_IMAGES,
EXPORT_BLEN_OBS,\
EXPORT_GROUP_BY_OB, EXPORT_GROUP_BY_MAT,
EXPORT_KEEP_VERT_ORDER,\
- EXPORT_POLYGROUPS
+ EXPORT_POLYGROUPS, EXPORT_CURVE_AS_NURBS
Draw.Label('Context...', ui_x+9, ui_y+239, 220, 20)
Draw.BeginAlign()
@@ -726,7 +814,9 @@
Draw.EndAlign()
EXPORT_POLYGROUPS = Draw.Toggle('Polygroups',
EVENT_REDRAW, ui_x+9, ui_y+95, 120, 20, EXPORT_POLYGROUPS.val, 'Export vertex
groups as OBJ groups (one group per face approximation).')
+ EXPORT_CURVE_AS_NURBS = Draw.Toggle('Nurbs',
EVENT_NONE, ui_x+139, ui_y+95, 100, 20, EXPORT_CURVE_AS_NURBS.val, 'Export 3D
nurbs curves and polylines as OBJ curves, (bezier not supported).')
+
Draw.Label('Blender Objects as OBJ:', ui_x+9, ui_y+59,
220, 20)
Draw.BeginAlign()
EXPORT_BLEN_OBS = Draw.Toggle('Objects', EVENT_REDRAW,
ui_x+9, ui_y+39, 60, 20, EXPORT_BLEN_OBS.val, 'Export blender objects as "OBJ
objects".', do_split)
@@ -779,6 +869,7 @@
EXPORT_GROUP_BY_MAT = EXPORT_GROUP_BY_MAT.val
EXPORT_KEEP_VERT_ORDER = EXPORT_KEEP_VERT_ORDER.val
EXPORT_POLYGROUPS = EXPORT_POLYGROUPS.val
+ EXPORT_CURVE_AS_NURBS = EXPORT_CURVE_AS_NURBS.val
base_name, ext = splitExt(filename)
@@ -828,7 +919,7 @@
EXPORT_COPY_IMAGES, EXPORT_APPLY_MODIFIERS,\
EXPORT_ROTX90, EXPORT_BLEN_OBS,\
EXPORT_GROUP_BY_OB, EXPORT_GROUP_BY_MAT,
EXPORT_KEEP_VERT_ORDER,\
- EXPORT_POLYGROUPS)
+ EXPORT_POLYGROUPS, EXPORT_CURVE_AS_NURBS)
Blender.Set('curframe', orig_frame)
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