trying to execute it gives:
RuntimeError: Error: Traceback (most recent call last):
File “\operator_mesh_add.py”, line 89, in execute
AttributeError: ‘Mesh’ object has no attribute ‘faces’
Experimenting I got it to work using bmesh!
import bpy
import bmesh
def add_box(width, height, depth):
"""
This function takes inputs and returns vertex and face arrays.
no actual mesh data creation is done here.
"""
vertices = [1.0, 1.0, -1.0,
1.0, -1.0, -1.0,
-1.0, -1.0, -1.0,
-1.0, 1.0, -1.0,
1.0, 1.0, 1.0,
1.0, -1.0, 1.0,
-1.0, -1.0, 1.0,
-1.0, 1.0, 1.0,
]
faces = [0, 1, 2, 3,
4, 7, 6, 5,
0, 4, 5, 1,
1, 5, 6, 2,
2, 6, 7, 3,
4, 0, 3, 7,
]
# apply size
for i in range(0, len(vertices), 3):
vertices[i] *= width
vertices[i + 1] *= depth
vertices[i + 2] *= height
return vertices, faces
from bpy.props import FloatProperty, BoolProperty, FloatVectorProperty
class AddBox(bpy.types.Operator):
'''Add a simple box mesh'''
bl_idname = "mesh.primitive_box_add"
bl_label = "Add Box"
bl_options = {'REGISTER', 'UNDO'}
width = FloatProperty(
name="Width",
description="Box Width",
min=0.01, max=100.0,
default=1.0,
)
height = FloatProperty(
name="Height",
description="Box Height",
min=0.01, max=100.0,
default=1.0,
)
depth = FloatProperty(
name="Depth",
description="Box Depth",
min=0.01, max=100.0,
default=1.0,
)
# generic transform props
view_align = BoolProperty(
name="Align to View",
default=False,
)
location = FloatVectorProperty(
name="Location",
subtype='TRANSLATION',
)
rotation = FloatVectorProperty(
name="Rotation",
subtype='EULER',
)
def execute(self, context):
verts_loc, faces = add_box(self.width,
self.height,
self.depth,
)
mesh = bpy.data.meshes.new("Box")
bm = bmesh.new()
nb_verts = len(verts_loc) // 3
for el in range(nb_verts):
startI = range(el*3,el*3+3)
bm.verts.new([verts_loc[i] for i in startI])
nb_faces = len(faces)// 4
for el in range(nb_faces):
startI = range(el*4,el*4 +4)
tmp = [bm.verts[faces[i]] for i in startI]
# print(tmp)
bm.faces.new(tmp)
# mesh.vertices.add(len(verts_loc) // 3)
# mesh.faces.add(len(faces) // 4)
# mesh.vertices.foreach_set("co", verts_loc)
# mesh.faces.foreach_set("vertices_raw", faces)
bm.to_mesh(mesh)
print(len(mesh.vertices),len(mesh.polygons))
mesh.update()
# add the mesh as an object into the scene with this utility module
from bpy_extras import object_utils
object_utils.object_data_add(context, mesh, operator=self)
return {'FINISHED'}
def menu_func(self, context):
self.layout.operator(AddBox.bl_idname, icon='MESH_CUBE')
def register():
bpy.utils.register_class(AddBox)
bpy.types.INFO_MT_mesh_add.append(menu_func)
def unregister():
bpy.utils.unregister_class(AddBox)
bpy.types.INFO_MT_mesh_add.remove(menu_func)
if __name__ == "__main__":
register()
# test call
bpy.ops.mesh.primitive_box_add()
