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OpenMesh
openmesh-python
Commits
992863a8
Commit
992863a8
authored
Jan 26, 2018
by
Alexander Dielen
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added functions that get and set properties for all mesh items
parent
81c40d03
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1
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src/Mesh.hh
src/Mesh.hh
+120
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src/Mesh.hh
View file @
992863a8
...
...
@@ -317,6 +317,92 @@ py::array_t<int> face_indices_poly(PolyMesh& _self) {
return
py
::
array_t
<
int
>
(
shape
,
strides
,
indices
,
free_when_done
);
}
/**
* Attempts to return a custom property for all mesh items at once using a
* numpy array. Returns an empty array if the property contains elements that
* are not numpy arrays or at least one of the arrays has a non-uniform shape.
*
* @note The returned array is constructed on the fly and contains copies
* of the actual property values.
*/
template
<
class
Mesh
,
class
PropHandle
,
class
IndexHandle
>
py
::
array_t
<
double
>
property_array
(
Mesh
&
_self
,
PropHandle
_ph
,
size_t
_n
)
{
// assume that all arrays have the same size and
// retrieve the size of the first array
const
py
::
object
tmp_obj
=
_self
.
property
(
_ph
,
IndexHandle
(
0
));
py
::
array_t
<
double
>
tmp_arr
;
try
{
tmp_arr
=
tmp_obj
.
cast
<
py
::
array_t
<
double
>
>
();
}
catch
(
py
::
error_already_set
&
e
)
{
return
py
::
array_t
<
double
>
();
}
const
size_t
size
=
tmp_arr
.
size
();
// better check this now
if
(
size
==
0
)
{
return
py
::
array_t
<
double
>
();
}
// allocate memory
double
*
data
=
new
double
[
size
*
_n
];
// copy one array at a time
for
(
size_t
i
=
0
;
i
<
_n
;
++
i
)
{
const
IndexHandle
ih
(
i
);
const
py
::
object
obj
=
_self
.
property
(
_ph
,
ih
);
try
{
const
auto
arr
=
obj
.
cast
<
py
::
array_t
<
double
>
>
();
if
(
arr
.
size
()
!=
size
)
{
throw
py
::
error_already_set
();
}
std
::
copy
(
arr
.
data
(
0
),
arr
.
data
(
0
)
+
size
,
&
data
[
size
*
i
]);
}
catch
(
py
::
error_already_set
&
e
)
{
delete
[]
data
;
return
py
::
array_t
<
double
>
();
}
}
// make numpy array
const
auto
shape
=
{
_n
,
size
};
const
auto
strides
=
{
size
*
sizeof
(
double
),
sizeof
(
double
)};
py
::
capsule
free_when_done
(
data
,
[](
void
*
f
)
{
double
*
ptr
=
reinterpret_cast
<
double
*>
(
f
);
delete
[]
ptr
;
});
return
py
::
array_t
<
double
>
(
shape
,
strides
,
data
,
free_when_done
);
}
/**
* Attempts to set a custom property for all mesh items at once using a
* numpy array.
*
* @note The property is set to copies of slices of _arr.
*/
template
<
class
Mesh
,
class
PropHandle
,
class
IndexHandle
>
void
set_property_array
(
Mesh
&
_self
,
PropHandle
_ph
,
py
::
array_t
<
double
>
_arr
,
size_t
_n
)
{
// array cannot be empty and its shape has to be (_n, m,...)
if
(
_arr
.
size
()
==
0
||
_arr
.
ndim
()
<
2
||
_arr
.
shape
(
0
)
!=
_n
)
{
return
;
}
// copy one array at a time
const
size_t
size
=
_arr
.
strides
(
0
)
/
sizeof
(
double
);
for
(
size_t
i
=
0
;
i
<
_n
;
++
i
)
{
double
*
data
=
new
double
[
size
];
std
::
copy
(
_arr
.
data
(
i
),
_arr
.
data
(
i
)
+
size
,
data
);
const
auto
shape
=
{
size
};
const
auto
strides
=
{
sizeof
(
double
)};
py
::
capsule
free_when_done
(
data
,
[](
void
*
f
)
{
double
*
ptr
=
reinterpret_cast
<
double
*>
(
f
);
delete
[]
ptr
;
});
py
::
array_t
<
double
>
tmp
(
shape
,
strides
,
data
,
free_when_done
);
_self
.
property
(
_ph
,
IndexHandle
(
i
))
=
tmp
;
}
}
/**
* This function template is used to expose mesh member functions that are only
* available for a specific type of mesh (i.e. they are available for polygon
...
...
@@ -1102,6 +1188,40 @@ void expose_mesh(py::module& m, const char *_name) {
.
def
(
"face_normals"
,
[](
Mesh
&
_self
)
{
return
vec2numpy
(
_self
,
_self
.
normal
(
OM
::
FaceHandle
(
0
)),
_self
.
n_faces
());
})
.
def
(
"face_colors"
,
[](
Mesh
&
_self
)
{
return
vec2numpy
(
_self
,
_self
.
color
(
OM
::
FaceHandle
(
0
)),
_self
.
n_faces
());
})
//======================================================================
// property_array
//======================================================================
.
def
(
"property_array"
,
[]
(
Mesh
&
_self
,
OM
::
VPropHandleT
<
py
::
object
>
_ph
)
{
return
property_array
<
Mesh
,
OM
::
VPropHandleT
<
py
::
object
>
,
OM
::
VertexHandle
>
(
_self
,
_ph
,
_self
.
n_vertices
());
})
.
def
(
"property_array"
,
[]
(
Mesh
&
_self
,
OM
::
HPropHandleT
<
py
::
object
>
_ph
)
{
return
property_array
<
Mesh
,
OM
::
HPropHandleT
<
py
::
object
>
,
OM
::
HalfedgeHandle
>
(
_self
,
_ph
,
_self
.
n_halfedges
());
})
.
def
(
"property_array"
,
[]
(
Mesh
&
_self
,
OM
::
EPropHandleT
<
py
::
object
>
_ph
)
{
return
property_array
<
Mesh
,
OM
::
EPropHandleT
<
py
::
object
>
,
OM
::
EdgeHandle
>
(
_self
,
_ph
,
_self
.
n_edges
());
})
.
def
(
"property_array"
,
[]
(
Mesh
&
_self
,
OM
::
FPropHandleT
<
py
::
object
>
_ph
)
{
return
property_array
<
Mesh
,
OM
::
FPropHandleT
<
py
::
object
>
,
OM
::
FaceHandle
>
(
_self
,
_ph
,
_self
.
n_faces
());
})
//======================================================================
// set_property_array
//======================================================================
.
def
(
"set_property_array"
,
[]
(
Mesh
&
_self
,
OM
::
VPropHandleT
<
py
::
object
>
_ph
,
py
::
array_t
<
double
>
_arr
)
{
return
set_property_array
<
Mesh
,
OM
::
VPropHandleT
<
py
::
object
>
,
OM
::
VertexHandle
>
(
_self
,
_ph
,
_arr
,
_self
.
n_vertices
());
})
.
def
(
"set_property_array"
,
[]
(
Mesh
&
_self
,
OM
::
HPropHandleT
<
py
::
object
>
_ph
,
py
::
array_t
<
double
>
_arr
)
{
return
set_property_array
<
Mesh
,
OM
::
HPropHandleT
<
py
::
object
>
,
OM
::
HalfedgeHandle
>
(
_self
,
_ph
,
_arr
,
_self
.
n_halfedges
());
})
.
def
(
"set_property_array"
,
[]
(
Mesh
&
_self
,
OM
::
EPropHandleT
<
py
::
object
>
_ph
,
py
::
array_t
<
double
>
_arr
)
{
return
set_property_array
<
Mesh
,
OM
::
EPropHandleT
<
py
::
object
>
,
OM
::
EdgeHandle
>
(
_self
,
_ph
,
_arr
,
_self
.
n_edges
());
})
.
def
(
"set_property_array"
,
[]
(
Mesh
&
_self
,
OM
::
FPropHandleT
<
py
::
object
>
_ph
,
py
::
array_t
<
double
>
_arr
)
{
return
set_property_array
<
Mesh
,
OM
::
FPropHandleT
<
py
::
object
>
,
OM
::
FaceHandle
>
(
_self
,
_ph
,
_arr
,
_self
.
n_faces
());
})
;
expose_type_specific_functions
(
class_mesh
);
...
...
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