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# ##### BEGIN GPL LICENSE BLOCK #####
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software Foundation,
# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#
# ##### END GPL LICENSE BLOCK #####
# <pep8-80 compliant>
"""
This script exports Stanford PLY files from Blender. It supports normals,
colors, and texture coordinates per face or per vertex.
Only one mesh can be exported at a time.
"""
import bpy
import os
def save_mesh(filepath,
mesh,
use_normals=True,
use_uv_coords=True,
use_colors=True,
):
def rvec3d(v):
return round(v[0], 6), round(v[1], 6), round(v[2], 6)
def rvec2d(v):
return round(v[0], 6), round(v[1], 6)
file = open(filepath, "w", encoding="utf8", newline="\n")
fw = file.write
# Be sure tessface & co are available!
if not mesh.tessfaces and mesh.polygons:
mesh.calc_tessface()
has_uv = bool(mesh.tessface_uv_textures)
has_vcol = bool(mesh.tessface_vertex_colors)
if not has_uv:
use_uv_coords = False
if not has_vcol:
use_colors = False
if not use_uv_coords:
has_uv = False
if not use_colors:
has_vcol = False
if has_uv:
active_uv_layer = mesh.tessface_uv_textures.active
if not active_uv_layer:
use_uv_coords = False
has_uv = False
else:
active_uv_layer = active_uv_layer.data
if has_vcol:
active_col_layer = mesh.tessface_vertex_colors.active
if not active_col_layer:
use_colors = False
has_vcol = False
else:
active_col_layer = active_col_layer.data
# in case
color = uvcoord = uvcoord_key = normal = normal_key = None
mesh_verts = mesh.vertices # save a lookup
ply_verts = [] # list of dictionaries
# vdict = {} # (index, normal, uv) -> new index
vdict = [{} for i in range(len(mesh_verts))]
ply_faces = [[] for f in range(len(mesh.tessfaces))]
vert_count = 0
for i, f in enumerate(mesh.tessfaces):
smooth = not use_normals or f.use_smooth
if not smooth:
normal = f.normal[:]
normal_key = rvec3d(normal)
if has_uv:
uv = active_uv_layer[i]
uv = uv.uv1, uv.uv2, uv.uv3, uv.uv4
if has_vcol:
col = active_col_layer[i]
col = col.color1[:], col.color2[:], col.color3[:], col.color4[:]
f_verts = f.vertices
pf = ply_faces[i]
for j, vidx in enumerate(f_verts):
v = mesh_verts[vidx]
if smooth:
normal = v.normal[:]
normal_key = rvec3d(normal)
if has_uv:
uvcoord = uv[j][0], uv[j][1]
uvcoord_key = rvec2d(uvcoord)
if has_vcol:
color = col[j]
color = (
int(color[0] * 255.0),
int(color[1] * 255.0),
int(color[2] * 255.0),
int(color[3] * 255.0),
)
key = normal_key, uvcoord_key, color
vdict_local = vdict[vidx]
pf_vidx = vdict_local.get(key) # Will be None initially
if pf_vidx is None: # same as vdict_local.has_key(key)
pf_vidx = vdict_local[key] = vert_count
ply_verts.append((vidx, normal, uvcoord, color))
vert_count += 1
pf.append(pf_vidx)
fw("ply\n")
fw("format ascii 1.0\n")
fw("comment Created by Blender %s - "
"www.blender.org, source file: %r\n" %
(bpy.app.version_string, os.path.basename(bpy.data.filepath)))
fw("element vertex %d\n" % len(ply_verts))
fw("property float x\n"
"property float y\n"
"property float z\n")
if use_normals:
fw("property float nx\n"
"property float ny\n"
"property float nz\n")
if use_uv_coords:
fw("property float s\n"
"property float t\n")
if use_colors:
fw("property uchar red\n"
"property uchar green\n"
"property uchar blue\n"
"property uchar alpha\n")
fw("element face %d\n" % len(mesh.tessfaces))
fw("property list uchar uint vertex_indices\n")
fw("end_header\n")
for i, v in enumerate(ply_verts):
fw("%.6f %.6f %.6f" % mesh_verts[v[0]].co[:]) # co
if use_normals:
fw(" %.6f %.6f %.6f" % v[1]) # no
if use_uv_coords:
fw(" %.6f %.6f" % v[2]) # uv
if use_colors:
fw(" %u %u %u %u" % v[3]) # col
fw("\n")
for pf in ply_faces:
if len(pf) == 3:
fw("3 %d %d %d\n" % tuple(pf))
else:
fw("4 %d %d %d %d\n" % tuple(pf))
file.close()
print("writing %r done" % filepath)
return {'FINISHED'}
def save(operator,
context,
filepath="",
use_mesh_modifiers=True,
use_normals=True,
use_uv_coords=True,
use_colors=True,
global_matrix=None
):
scene = context.scene
obj = context.active_object
if global_matrix is None:
from mathutils import Matrix
global_matrix = Matrix()
if bpy.ops.object.mode_set.poll():
bpy.ops.object.mode_set(mode='OBJECT')
if use_mesh_modifiers and obj.modifiers:
mesh = obj.to_mesh(scene, True, 'PREVIEW')
else:
mesh = obj.data.copy()
if not mesh:
raise Exception("Error, could not get mesh data from active object")
mesh.transform(global_matrix * obj.matrix_world)
if use_normals:
mesh.calc_normals()
ret = save_mesh(filepath, mesh,
use_normals=use_normals,
use_uv_coords=use_uv_coords,
use_colors=use_colors,
)
if use_mesh_modifiers:
bpy.data.meshes.remove(mesh)
return ret
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