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import_hair_salon.py
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import_hair_salon.py
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bl_info = {
"name": "USC-HairSalon",
"author": "Shankar Sivarajan",
"blender": (3,2,0),
"version": (0, 0, 1),
"location": "File > Import-Export",
"description": "Import USC-HairSalon hairstyles",
"category": "Import-Export",
}
import bpy
import math
from mathutils import Vector
import struct
import array
from pathlib import Path
from bpy_extras.io_utils import ImportHelper
def addStrand(verts, edges, strand_data_xyz):
# add first vertex of strand
xyz_idx = 0
vec = Vector((strand_data_xyz[xyz_idx], strand_data_xyz[xyz_idx+1], strand_data_xyz[xyz_idx+2]))
verts.append(vec)
num_verts_to_add = int(len(strand_data_xyz)/3)
edge_vidx = len(verts)
for i in range(1, num_verts_to_add):
xyz_idx += 3
vec = Vector((strand_data_xyz[xyz_idx], strand_data_xyz[xyz_idx+1], strand_data_xyz[xyz_idx+2]))
verts.append(vec)
edges.append((edge_vidx-1, edge_vidx))
edge_vidx += 1
class ImportHair(bpy.types.Operator, ImportHelper):
bl_idname = "import_hair_salon.data"
bl_label = "Import USC-HairSalon hairstyle"
bl_description = "Import USC-HairSalon hairstyle"
# bl_options = {'UNDO'}
filename_ext = ".data";
filepath: bpy.props.StringProperty(subtype="FILE_PATH")
filter_glob: bpy.props.StringProperty(
default="*.data",
options={"HIDDEN"},
)
@classmethod
def poll(cls, context):
return True
def execute(self, context):
filename = self.filepath
name = Path(filename).stem
verts = []
edges = []
faces = []
with open(filename, "rb") as file:
num_strands = struct.unpack('<i', file.read(4))[0]
print(f"num_strands = {num_strands}")
assert num_strands == 10000, f"expected 10000 strands, got {num_strands} strands"
strand_idx = 0
while (strand_idx < num_strands):
# read num of verts of strand
strand_idx = strand_idx + 1
num_verts = struct.unpack('<i', file.read(4))[0]
assert num_verts == 1 or num_verts == 100, f"num_verts should be 1 or 100, got: {num_verts}"
# read strand
strand_data_xyz = array.array('f')
strand_data_xyz.fromfile(file, 3 * num_verts) # vert's XYZ corrds
if (num_verts < 2): # skip empty roots
continue
addStrand(verts, edges, strand_data_xyz.tolist())
print("Data read, creating hairstyle…")
# create the mesh
hair_mesh = bpy.data.meshes.new(name)
hair_mesh.from_pydata(verts, edges, faces)
hair_mesh.update()
# create object from mesh
hair_object = bpy.data.objects.new(name, hair_mesh)
# get collection
collection_name = 'USC-HairSalon'
hair_collection = bpy.data.collections.get(collection_name)
if hair_collection is None:
hair_collection = bpy.data.collections.new(collection_name)
bpy.context.scene.collection.children.link(hair_collection)
# add object to scene collection
hair_collection.objects.link(hair_object)
# fix rotation (90° X-axis)
hair_object.rotation_euler[0] = math.radians(90)
#select object & apply rotation
bpy.ops.object.select_all(action='DESELECT')
bpy.context.view_layer.objects.active = hair_object
hair_object.select_set(True)
bpy.ops.object.transform_apply(rotation=True)
return {'FINISHED'}
def draw(self, context):
pass
def menu_import(self, context):
self.layout.operator(ImportHair.bl_idname, text="USC-HairSalon (.data)")
def register():
bpy.utils.register_class(ImportHair)
bpy.types.TOPBAR_MT_file_import.append(menu_import)
def unregister():
bpy.utils.unregister_class(ImportHair)
bpy.types.TOPBAR_MT_file_import.remove(menu_import)
if __name__ == "__main__":
register()