diff options
author | Campbell Barton <ideasman42@gmail.com> | 2012-03-27 14:30:10 +0400 |
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committer | Campbell Barton <ideasman42@gmail.com> | 2012-03-27 14:30:10 +0400 |
commit | 7f1e9b8c4116915d1a7073f712f62f234454c323 (patch) | |
tree | 9839437ad783acad3cdcda27b4fd6d93dbeced10 /source/blender/python/bmesh/bmesh_py_types_meshdata.c | |
parent | 1e7bcece44a1fc149add915e812cd7f9027832c8 (diff) |
bmesh py api:
added access to deform weights, access to weights acts like a python dict so you can do...
print(group in dvert)
dvert[group] = 0.5
print(dvert[group])
del dvert[group]
print(dvert.items())
Diffstat (limited to 'source/blender/python/bmesh/bmesh_py_types_meshdata.c')
-rw-r--r-- | source/blender/python/bmesh/bmesh_py_types_meshdata.c | 330 |
1 files changed, 329 insertions, 1 deletions
diff --git a/source/blender/python/bmesh/bmesh_py_types_meshdata.c b/source/blender/python/bmesh/bmesh_py_types_meshdata.c index 56b3d764156..db8cc24ff0c 100644 --- a/source/blender/python/bmesh/bmesh_py_types_meshdata.c +++ b/source/blender/python/bmesh/bmesh_py_types_meshdata.c @@ -39,6 +39,10 @@ #include "BLI_utildefines.h" #include "BLI_math_vector.h" +#include "BKE_deform.h" + +#include "bmesh_py_types_meshdata.h" + /* Mesh Loop UV * ************ */ @@ -138,7 +142,7 @@ int BPy_BMLoopUV_AssignPyObject(struct MLoopUV *mloopuv, PyObject *value) return -1; } else { - *((MLoopUV *)mloopuv) = *((MLoopUV *)((BPy_BMLoopUV *)value)->data); + *((MLoopUV *)mloopuv) = *(((BPy_BMLoopUV *)value)->data); return 0; } } @@ -252,9 +256,333 @@ PyObject *BPy_BMLoopColor_CreatePyObject(struct MLoopCol *data) /* --- End Mesh Loop Color --- */ +/* Mesh Deform Vert + * **************** */ + +/** + * This is python type wraps a deform vert as a python dictionary, + * hiding the #MDeformWeight on access, since the mapping is very close, eg: + * + * C: + * weight = defvert_find_weight(dv, group_nr); + * defvert_remove_group(dv, dw) + * + * Py: + * weight = dv[group_nr] + * del dv[group_nr] + * + * \note: there is nothing BMesh spesific here, + * its only that BMesh is the only part of blender that uses a hand written api like this. + * This type could eventually be used to access lattice weights. + * + * \note: Many of blender-api's dict-like-wrappers act like ordered dicts, + * This is intentional _not_ ordered, the weights can be in any order and it wont matter, + * the order should not be used in the api in any meaningful way (as with a python dict) + * only expose as mapping, not a sequence. + */ + +#define BPy_BMDeformVert_Check(v) (Py_TYPE(v) == &BPy_BMDeformVert_Type) + +typedef struct BPy_BMDeformVert { + PyObject_VAR_HEAD + MDeformVert *data; +} BPy_BMDeformVert; + + +/* Mapping Protocols + * ================= */ + +static int bpy_bmdeformvert_len(BPy_BMDeformVert *self) +{ + return self->data->totweight; +} + +static PyObject *bpy_bmdeformvert_subscript(BPy_BMDeformVert *self, PyObject *key) +{ + if (PyIndex_Check(key)) { + int i; + i = PyNumber_AsSsize_t(key, PyExc_IndexError); + if (i == -1 && PyErr_Occurred()) { + return NULL; + } + else { + MDeformWeight *dw = defvert_find_index(self->data, i); + + if (dw == NULL) { + PyErr_SetString(PyExc_KeyError, "BMDeformVert[key] = x: " + "key not found"); + return NULL; + } + else { + return PyFloat_FromDouble(dw->weight); + } + } + } + else { + PyErr_Format(PyExc_TypeError, + "BMDeformVert keys must be integers, not %.200s", + Py_TYPE(key)->tp_name); + return NULL; + } +} + +static int bpy_bmdeformvert_ass_subscript(BPy_BMDeformVert *self, PyObject *key, PyObject *value) +{ + if (PyIndex_Check(key)) { + int i; + + i = PyNumber_AsSsize_t(key, PyExc_IndexError); + if (i == -1 && PyErr_Occurred()) { + return -1; + } + + if (value) { + /* dvert[group_index] = 0.5 */ + if (i < 0) { + PyErr_SetString(PyExc_KeyError, "BMDeformVert[key] = x: " + "weight keys can't be negative"); + return -1; + } + else { + MDeformWeight *dw = defvert_verify_index(self->data, i); + const float f = PyFloat_AsDouble(value); + if (f == -1 && PyErr_Occurred()) { // parsed key not a number + PyErr_SetString(PyExc_TypeError, + "BMDeformVert[key] = x: " + "argument not a number"); + return -1; + } + + dw->weight = CLAMPIS(f, 0.0f, 1.0f); + } + } + else { + /* del dvert[group_index] */ + MDeformWeight *dw = defvert_find_index(self->data, i); + + if (dw == NULL) { + PyErr_SetString(PyExc_KeyError, "del BMDeformVert[key]: " + "key not found"); + } + defvert_remove_group(self->data, dw); + } + + return 0; + + } + else { + PyErr_Format(PyExc_TypeError, + "BMDeformVert keys must be integers, not %.200s", + Py_TYPE(key)->tp_name); + return -1; + } +} + +static int bpy_bmdeformvert_contains(BPy_BMDeformVert *self, PyObject *value) +{ + const int key = PyLong_AsSsize_t(value); + + if (key == -1 && PyErr_Occurred()) { + PyErr_SetString(PyExc_TypeError, + "BMDeformVert.__contains__: expected an int"); + return -1; + } + + return (defvert_find_index(self->data, key) != NULL) ? 1 : 0; +} + +/* only defined for __contains__ */ +static PySequenceMethods bpy_bmdeformvert_as_sequence = { + (lenfunc)bpy_bmdeformvert_len, /* sq_length */ + NULL, /* sq_concat */ + NULL, /* sq_repeat */ + + /* note: if this is set PySequence_Check() returns True, + * but in this case we dont want to be treated as a seq */ + NULL, /* sq_item */ + + NULL, /* sq_slice */ + NULL, /* sq_ass_item */ + NULL, /* *was* sq_ass_slice */ + (objobjproc)bpy_bmdeformvert_contains, /* sq_contains */ + (binaryfunc) NULL, /* sq_inplace_concat */ + (ssizeargfunc) NULL, /* sq_inplace_repeat */ +}; + +static PyMappingMethods bpy_bmdeformvert_as_mapping = { + (lenfunc)bpy_bmdeformvert_len, + (binaryfunc)bpy_bmdeformvert_subscript, + (objobjargproc)bpy_bmdeformvert_ass_subscript +}; + +/* Methods + * ======= */ + +PyDoc_STRVAR(bpy_bmdeformvert_keys_doc, +".. method:: keys()\n" +"\n" +" Return the group indices used by this vertex\n" +" (matching pythons dict.keys() functionality).\n" +"\n" +" :return: the deform group this vertex uses\n" +" :rtype: list of ints\n" +); +static PyObject *bpy_bmdeformvert_keys(BPy_BMDeformVert *self) +{ + PyObject *ret; + int i; + MDeformWeight *dw = self->data->dw; + + ret = PyList_New(self->data->totweight); + for (i = 0; i < self->data->totweight; i++, dw++) { + PyList_SET_ITEM(ret, i, PyLong_FromSsize_t(dw->def_nr)); + } + + return ret; +} + +PyDoc_STRVAR(bpy_bmdeformvert_values_doc, +".. method:: items()\n" +"\n" +" Return (group, weight) pairs for this vertex\n" +" (matching pythons dict.items() functionality).\n" +"\n" +" :return: (key, value) pairs for each deform weight of this vertex.\n" +" :rtype: list of tuples\n" +); +static PyObject *bpy_bmdeformvert_values(BPy_BMDeformVert *self) +{ + PyObject *ret; + int i; + MDeformWeight *dw = self->data->dw; + + ret = PyList_New(self->data->totweight); + for (i = 0; i < self->data->totweight; i++, dw++) { + PyList_SET_ITEM(ret, i, PyFloat_FromDouble(dw->weight)); + } + + return ret; +} + +PyDoc_STRVAR(bpy_bmdeformvert_items_doc, +".. method:: values()\n" +"\n" +" Return the weights of the deform vertex\n" +" (matching pythons dict.values() functionality).\n" +"\n" +" :return: The weights that influence this vertex\n" +" :rtype: list of floats\n" +); +static PyObject *bpy_bmdeformvert_items(BPy_BMDeformVert *self) +{ + PyObject *ret; + PyObject *item; + int i; + MDeformWeight *dw = self->data->dw; + + ret = PyList_New(self->data->totweight); + for (i = 0; i < self->data->totweight; i++, dw++) { + item = PyTuple_New(2); + + PyTuple_SET_ITEM(item, 0, PyLong_FromSsize_t(dw->def_nr)); + PyTuple_SET_ITEM(item, 1, PyFloat_FromDouble(dw->weight)); + + PyList_SET_ITEM(ret, i, item); + } + + return ret; +} + +PyDoc_STRVAR(bpy_bmdeformvert_get_doc, +".. method:: get(key, default=None)\n" +"\n" +" Returns the deform weight matching the key or default\n" +" when not found (matches pythons dictionary function of the same name).\n" +"\n" +" :arg key: The key associated with deform weight.\n" +" :type key: int\n" +" :arg default: Optional argument for the value to return if\n" +" *key* is not found.\n" +" :type default: Undefined\n" +); +static PyObject *bpy_bmdeformvert_get(BPy_BMDeformVert *self, PyObject *args) +{ + int key; + PyObject *def = Py_None; + + if (!PyArg_ParseTuple(args, "i|O:get", &key, &def)) { + return NULL; + } + else { + MDeformWeight *dw = defvert_find_index(self->data, key); + + if (dw) { + return PyFloat_FromDouble(dw->weight); + } + else { + return Py_INCREF(def), def; + } + } +} + +static struct PyMethodDef bpy_bmdeformvert_methods[] = { + {"keys", (PyCFunction)bpy_bmdeformvert_keys, METH_NOARGS, bpy_bmdeformvert_keys_doc}, + {"values", (PyCFunction)bpy_bmdeformvert_values, METH_NOARGS, bpy_bmdeformvert_values_doc}, + {"items", (PyCFunction)bpy_bmdeformvert_items, METH_NOARGS, bpy_bmdeformvert_items_doc}, + {"get", (PyCFunction)bpy_bmdeformvert_get, METH_VARARGS, bpy_bmdeformvert_get_doc}, + /* BMESH_TODO */ + {NULL, NULL, 0, NULL} +}; + +PyTypeObject BPy_BMDeformVert_Type = {{{0}}}; /* bm.loops.layers.uv.active */ + +static void bm_init_types_bmdvert(void) +{ + BPy_BMDeformVert_Type.tp_basicsize = sizeof(BPy_BMDeformVert); + + BPy_BMDeformVert_Type.tp_name = "BMDeformVert"; + + BPy_BMDeformVert_Type.tp_doc = NULL; // todo + + BPy_BMDeformVert_Type.tp_as_sequence = &bpy_bmdeformvert_as_sequence; + BPy_BMDeformVert_Type.tp_as_mapping = &bpy_bmdeformvert_as_mapping; + + BPy_BMDeformVert_Type.tp_methods = bpy_bmdeformvert_methods; + + BPy_BMDeformVert_Type.tp_flags = Py_TPFLAGS_DEFAULT; + + PyType_Ready(&BPy_BMDeformVert_Type); +} + +int BPy_BMDeformVert_AssignPyObject(struct MDeformVert *dvert, PyObject *value) +{ + if (UNLIKELY(!BPy_BMDeformVert_Check(value))) { + PyErr_Format(PyExc_TypeError, "expected BMDeformVert, not a %.200s", Py_TYPE(value)->tp_name); + return -1; + } + else { + MDeformVert *dvert_src = ((BPy_BMDeformVert *)value)->data; + if (LIKELY(dvert != dvert_src)) { + defvert_copy(dvert, dvert_src); + } + return 0; + } +} + +PyObject *BPy_BMDeformVert_CreatePyObject(struct MDeformVert *dvert) +{ + BPy_BMDeformVert *self = PyObject_New(BPy_BMDeformVert, &BPy_BMDeformVert_Type); + self->data = dvert; + return (PyObject *)self; +} + +/* --- End Mesh Deform Vert --- */ + + /* call to init all types */ void BPy_BM_init_types_meshdata(void) { bm_init_types_bmloopuv(); bm_init_types_bmloopcol(); + bm_init_types_bmdvert(); } |