Created
May 20, 2022 14:36
-
-
Save flowb/31776cf55d0b55f549f69bf291d1fb9c to your computer and use it in GitHub Desktop.
Maya Groom UV export
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
from maya import cmds | |
from maya import OpenMaya | |
import os | |
def create_root_uv_attribute(curves_group, mesh_node, uv_set='map1'): | |
''' | |
Create "groom_root_uv" attribute on group of curves. | |
''' | |
# check curves group | |
if not cmds.objExists(curves_group): | |
raise RuntimeError('Group not found: "{}"'.format(curves_group)) | |
# get curves in group | |
curve_shapes = cmds.listRelatives(curves_group, shapes=True, noIntermediate=True) | |
curve_shapes = cmds.ls(curve_shapes, type='nurbsCurve') | |
if not curve_shapes: | |
raise RuntimeError('Invalid curves group. No nurbs-curves found in group.') | |
else: | |
print "found curves" | |
print curve_shapes | |
# get curve roots | |
points = list() | |
for curve_shape in curve_shapes: | |
point = cmds.pointPosition('{}.cv[0]'.format(curve_shape), world=True) | |
points.append(point) | |
# get uvs | |
values = list() | |
uvs = find_closest_uv_point(points, mesh_node, uv_set=uv_set) | |
for u, v in uvs: | |
values.append([u, v, 0]) | |
#print (str(u) + " , " + str(v) ) | |
# create attribute | |
name = 'groom_root_uv' | |
cmds.addAttr(curves_group, ln=name, dt='vectorArray') | |
cmds.addAttr(curves_group, ln='{}_AbcGeomScope'.format(name), dt='string') | |
cmds.addAttr(curves_group, ln='{}_AbcType'.format(name), dt='string') | |
cmds.setAttr('{}.{}'.format(curves_group, name), len(values), *values, type='vectorArray') | |
cmds.setAttr('{}.{}_AbcGeomScope'.format(curves_group, name), 'uni', type='string') | |
cmds.setAttr('{}.{}_AbcType'.format(curves_group, name), 'vector2', type='string') | |
return uvs | |
def find_closest_uv_point(points, mesh_node, uv_set='map1'): | |
''' | |
Find mesh UV-coordinates at given points. | |
''' | |
# check mesh | |
if not cmds.objExists(mesh_node): | |
raise RuntimeError('Node not found: "{}"'.format(mesh_node)) | |
# check uv_set | |
uv_sets = cmds.polyUVSet(mesh_node, q=True, allUVSets=True) | |
if uv_set not in uv_sets: | |
raise RuntimeError('Invalid uv_set provided: "{}"'.format(uv_set)) | |
# get mesh as dag-path | |
selection_list = OpenMaya.MSelectionList() | |
selection_list.add(mesh_node) | |
mesh_dagpath = OpenMaya.MDagPath() | |
selection_list.getDagPath(0, mesh_dagpath) | |
mesh_dagpath.extendToShape() | |
# get mesh function set | |
fn_mesh = OpenMaya.MFnMesh(mesh_dagpath) | |
uvs = list() | |
for i in range(len(points)): | |
script_util = OpenMaya.MScriptUtil() | |
script_util.createFromDouble(0.0, 0.0) | |
uv_point = script_util.asFloat2Ptr() | |
point = OpenMaya.MPoint(*points[i]) | |
fn_mesh.getUVAtPoint(point, uv_point, OpenMaya.MSpace.kWorld, uv_set) | |
u = OpenMaya.MScriptUtil.getFloat2ArrayItem(uv_point, 0, 0) | |
v = OpenMaya.MScriptUtil.getFloat2ArrayItem(uv_point, 0, 1) | |
uvs.append((u, v)) | |
return uvs | |
def abc_export(filepath, node=None, start_frame=1, end_frame=1, data_format='otawa', uv_write=True): | |
job_command = '-frameRange {} {} '.format(start_frame, end_frame) | |
job_command += '-dataFormat {} '.format(data_format) | |
job_command += '-attr groom_root_uv ' | |
if uv_write: | |
job_command += '-uvWrite ' | |
job_command += '-root {} '.format(node) | |
job_command += '-file {} '.format(filepath) | |
cmds.AbcExport(verbose=True, j=job_command) | |
def main(): | |
export_directory = 'D:/Dev/Ref' | |
hair_file = os.path.join(export_directory, 'hair_export.abc') | |
curve_top_group= 'description1|SplineGrp0' | |
uv_mesh='pPlane1' | |
create_root_uv_attribute( curve_top_group , uv_mesh) | |
abc_export(hair_file, curve_top_group) | |
main() |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment