How to export groom with attributes from Houdini to Unreal5?

Development Character & Animation
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1

Hello guys!

I’m new to Unreal and Houdini. I’m trying to export the groom to uneal.

For now, I’m able to export ‘groom_width’, ‘groom_guide’, ‘groom_color’, ‘groom_root_uv’, ‘groom_id’ and ‘groom_group_id’

but I have no idea how to export ‘groom_group_name’ ‘groom_closest_guides’ and ‘groom_guide_weights’.

for the group name, sidefx lab - unreal groom export didn’t work for Unreal 5.1

and for closest guides and gudie weights, I don’t know whitch attributes I should set for.

1 Like
2

Does anyone know how to solve this problem?

3

Hi there! Dunno if you solved it but I followed this video: https://www.youtube.com/watch?v=hrDMH25cswg

4

Hi, Thanks for sharing, I have posted the comment under the video from two years ago

mazi2043
Does anyone know how to export ‘groom_group_name’ ‘groom_closest_guides’ and ‘groom_guide_weights’ attributes to Unreal?

5 
#引导线创建groom_group_id属性
def add_groom_id(self,curve_groups):
    attr_name = 'groom_id'
    for groom_id,curve_group in enumerate(curve_groups,start=1):
        cmds.addAttr(curve_group, longName=attr_name, attributeType='short', keyable=True)
        cmds.addAttr(curve_group, longName='{}_AbcGeomScope'.format(attr_name), dataType='string')
        cmds.setAttr('{}.{}'.format(curve_group, attr_name), groom_id)
        cmds.setAttr('{}.{}_AbcGeomScope'.format(curve_group, attr_name), 'uni', type='string')
        print('{}_groom_id:{}'.format(curve_group,groom_id))

#毛发创建add_groom_closest_guides属性
def add_groom_closest_guides(self,curve_group):
    attr_name = 'groom_closest_guides'
    values = [[0,0,1],[0,0,1]]
    cmds.addAttr(curve_group, longName=attr_name, dataType='vectorArray')
    cmds.addAttr(curve_group, longName='{}_AbcGeomScope'.format(attr_name), dataType='string')
    cmds.addAttr(curve_group, longName='{}_AbcType'.format(attr_name), dataType='string')
    cmds.setAttr('{}.{}'.format(curve_group, attr_name), len(values), *values, type='vectorArray')
    cmds.setAttr('{}.{}_AbcGeomScope'.format(curve_group, attr_name), 'uni', type='string')
    cmds.setAttr('{}.{}_AbcType'.format(curve_group, attr_name), 'vector3', type='string')

#毛发创建groom_guide_weights属性
def add_groom_guide_weights(self,curve_group):
    attr_name = 'groom_guide_weights'
    values = [[1,1,1],[1,1,1]]
    cmds.addAttr(curve_group, longName=attr_name, dataType='vectorArray')
    cmds.addAttr(curve_group, longName='{}_AbcGeomScope'.format(attr_name), dataType='string')
    cmds.addAttr(curve_group, longName='{}_AbcType'.format(attr_name), dataType='string')
    cmds.setAttr('{}.{}'.format(curve_group, attr_name), len(values), *values, type='vectorArray')
    cmds.setAttr('{}.{}_AbcGeomScope'.format(curve_group, attr_name), 'uni', type='string')
    cmds.setAttr('{}.{}_AbcType'.format(curve_group, attr_name), 'vector3', type='string')