From d22b2014a290f23b5f563520b211ea6c341a3581 Mon Sep 17 00:00:00 2001
From: Campbell Barton <ideasman42@gmail.com>
Date: Sun, 10 Feb 2013 12:55:10 +0000
Subject: [PATCH] OBJ now exports blenders ngons.
---
io_scene_obj/export_obj.py | 123 ++++++++++++++++++++-----------------
1 file changed, 66 insertions(+), 57 deletions(-)
diff --git a/io_scene_obj/export_obj.py b/io_scene_obj/export_obj.py
index fed389c61..2d2ed6382 100644
--- a/io_scene_obj/export_obj.py
+++ b/io_scene_obj/export_obj.py
@@ -33,6 +33,18 @@ def name_compat(name):
return name.replace(' ', '_')
+def mesh_triangulate(me):
+ pass
+ '''
+ import bmesh
+ bm = bmesh.new()
+ bm.from_mesh(me)
+ bmesh.ops.triangulate(bm, faces=bm.faces)
+ bm.to_mesh(me)
+ bm.free()
+ '''
+
+
def write_mtl(scene, filepath, path_mode, copy_set, mtl_dict):
from mathutils import Color
@@ -362,14 +374,15 @@ def write_file(filepath, objects, scene,
if EXPORT_UV:
faceuv = len(me.uv_textures) > 0
if faceuv:
- uv_layer = me.tessface_uv_textures.active.data[:]
+ uv_texture = me.uv_textures.active.data[:]
+ uv_layer = me.uv_layers.active.data[:]
else:
faceuv = False
me_verts = me.vertices[:]
# Make our own list so it can be sorted to reduce context switching
- face_index_pairs = [(face, index) for index, face in enumerate(me.tessfaces)]
+ face_index_pairs = [(face, index) for index, face in enumerate(me.polygons)]
# faces = [ f for f in me.tessfaces ]
if EXPORT_EDGES:
@@ -384,6 +397,9 @@ def write_file(filepath, objects, scene,
continue # dont bother with this mesh.
+ if EXPORT_TRI:
+ mesh_triangulate(me)
+
if EXPORT_NORMALS and face_index_pairs:
me.calc_normals()
@@ -400,7 +416,7 @@ def write_file(filepath, objects, scene,
if EXPORT_KEEP_VERT_ORDER:
pass
elif faceuv:
- face_index_pairs.sort(key=lambda a: (a[0].material_index, hash(uv_layer[a[1]].image), a[0].use_smooth))
+ face_index_pairs.sort(key=lambda a: (a[0].material_index, hash(uv_texture[a[1]].image), a[0].use_smooth))
elif len(materials) > 1:
face_index_pairs.sort(key=lambda a: (a[0].material_index, a[0].use_smooth))
else:
@@ -433,12 +449,13 @@ def write_file(filepath, objects, scene,
# in case removing some of these dont get defined.
uv = uvkey = uv_dict = f_index = uv_index = None
- uv_face_mapping = [[0, 0, 0, 0] for i in range(len(face_index_pairs))] # a bit of a waste for tri's :/
+ uv_face_mapping = [[0] * a[0].loop_total for i, a in enumerate(face_index_pairs)]
uv_dict = {} # could use a set() here
- uv_layer = me.tessface_uv_textures.active.data
for f, f_index in face_index_pairs:
- for uv_index, uv in enumerate(uv_layer[f_index].uv):
+ for uv_index, l_index in enumerate(f.loop_indices):
+ uv = uv_layer[l_index].uv
+
uvkey = veckey2d(uv)
try:
uv_face_mapping[f_index][uv_index] = uv_dict[uvkey]
@@ -489,7 +506,7 @@ def write_file(filepath, objects, scene,
f_mat = min(f.material_index, len(materials) - 1)
if faceuv:
- tface = uv_layer[f_index]
+ tface = uv_texture[f_index]
f_image = tface.image
# MAKE KEY
@@ -559,61 +576,53 @@ def write_file(filepath, objects, scene,
fw('s off\n')
contextSmooth = f_smooth
- f_v_orig = [(vi, me_verts[v_idx]) for vi, v_idx in enumerate(f.vertices)]
+ f_v = [(vi, me_verts[v_idx]) for vi, v_idx in enumerate(f.vertices)]
- if not EXPORT_TRI or len(f_v_orig) == 3:
- f_v_iter = (f_v_orig, )
- else:
- f_v_iter = (f_v_orig[0], f_v_orig[1], f_v_orig[2]), (f_v_orig[0], f_v_orig[2], f_v_orig[3])
-
- # support for triangulation
- for f_v in f_v_iter:
- fw('f')
-
- if faceuv:
- if EXPORT_NORMALS:
- if f_smooth: # Smoothed, use vertex normals
- for vi, v in f_v:
- fw(" %d/%d/%d" %
- (v.index + totverts,
- totuvco + uv_face_mapping[f_index][vi],
- globalNormals[veckey3d(v.normal)],
- )) # vert, uv, normal
-
- else: # No smoothing, face normals
- no = globalNormals[veckey3d(f.normal)]
- for vi, v in f_v:
- fw(" %d/%d/%d" %
- (v.index + totverts,
- totuvco + uv_face_mapping[f_index][vi],
- no,
- )) # vert, uv, normal
- else: # No Normals
+ fw('f')
+ if faceuv:
+ if EXPORT_NORMALS:
+ if f_smooth: # Smoothed, use vertex normals
+ for vi, v in f_v:
+ fw(" %d/%d/%d" %
+ (v.index + totverts,
+ totuvco + uv_face_mapping[f_index][vi],
+ globalNormals[veckey3d(v.normal)],
+ )) # vert, uv, normal
+
+ else: # No smoothing, face normals
+ no = globalNormals[veckey3d(f.normal)]
+ for vi, v in f_v:
+ fw(" %d/%d/%d" %
+ (v.index + totverts,
+ totuvco + uv_face_mapping[f_index][vi],
+ no,
+ )) # vert, uv, normal
+ else: # No Normals
+ for vi, v in f_v:
+ fw(" %d/%d" % (
+ v.index + totverts,
+ totuvco + uv_face_mapping[f_index][vi],
+ )) # vert, uv
+
+ face_vert_index += len(f_v)
+
+ else: # No UV's
+ if EXPORT_NORMALS:
+ if f_smooth: # Smoothed, use vertex normals
for vi, v in f_v:
- fw(" %d/%d" % (
+ fw(" %d//%d" % (
v.index + totverts,
- totuvco + uv_face_mapping[f_index][vi],
- )) # vert, uv
-
- face_vert_index += len(f_v)
-
- else: # No UV's
- if EXPORT_NORMALS:
- if f_smooth: # Smoothed, use vertex normals
- for vi, v in f_v:
- fw(" %d//%d" % (
- v.index + totverts,
- globalNormals[veckey3d(v.normal)],
- ))
- else: # No smoothing, face normals
- no = globalNormals[veckey3d(f.normal)]
- for vi, v in f_v:
- fw(" %d//%d" % (v.index + totverts, no))
- else: # No Normals
+ globalNormals[veckey3d(v.normal)],
+ ))
+ else: # No smoothing, face normals
+ no = globalNormals[veckey3d(f.normal)]
for vi, v in f_v:
- fw(" %d" % (v.index + totverts))
+ fw(" %d//%d" % (v.index + totverts, no))
+ else: # No Normals
+ for vi, v in f_v:
+ fw(" %d" % (v.index + totverts))
- fw('\n')
+ fw('\n')
# Write edges.
if EXPORT_EDGES:
--
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