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Provide access to UV indices data as used by many FBX files #9

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Provide access to UV indices data as used by many FBX files #9

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17 changes: 17 additions & 0 deletions ufbx/_ufbx.pyx
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Original file line number Diff line number Diff line change
Expand Up @@ -446,6 +446,7 @@ cdef extern from "ufbx_wrapper.h":
const float* ufbx_wrapper_mesh_get_vertex_bitangents(const ufbx_mesh *mesh, size_t *out_count)
const float* ufbx_wrapper_mesh_get_vertex_colors(const ufbx_mesh *mesh, size_t *out_count)
const uint32_t* ufbx_wrapper_mesh_get_indices(const ufbx_mesh *mesh, size_t *out_count)
const uint32_t* ufbx_wrapper_mesh_get_uv_indices(const ufbx_mesh *mesh, size_t *out_count)

# Mesh face data
size_t ufbx_wrapper_mesh_get_face_count(const ufbx_mesh *mesh)
Expand Down Expand Up @@ -2482,6 +2483,22 @@ cdef class Mesh(Element):
shape[0] = <np.npy_intp>count
return np.PyArray_SimpleNewFromData(1, shape, np.NPY_UINT32, <void*>data)

@property
def uv_indices(self):
"""UV indices as numpy array (N,)"""
if self._scene._closed:
raise RuntimeError("Scene is closed")

cdef size_t count = 0
cdef const uint32_t* data = ufbx_wrapper_mesh_get_uv_indices(self._mesh, &count)

if data == NULL or count == 0:
return None

cdef np.npy_intp shape[1]
shape[0] = <np.npy_intp>count
return np.PyArray_SimpleNewFromData(1, shape, np.NPY_UINT32, <void*>data)

@property
def materials(self):
"""Materials used by this mesh"""
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10 changes: 10 additions & 0 deletions ufbx/src/ufbx_wrapper.c
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Expand Up @@ -280,6 +280,16 @@ const uint32_t* ufbx_wrapper_mesh_get_indices(const ufbx_mesh *mesh, size_t *out
return mesh->vertex_position.indices.data;
}

const uint32_t* ufbx_wrapper_mesh_get_uv_indices(const ufbx_mesh *mesh, size_t *out_count) {
if (!mesh || !mesh->vertex_uv.exists || !out_count) {
if (out_count) *out_count = 0;
return NULL;
}

*out_count = mesh->vertex_uv.indices.count;
return mesh->vertex_uv.indices.data;
}

// Mesh face data
size_t ufbx_wrapper_mesh_get_face_count(const ufbx_mesh *mesh) {
return mesh ? mesh->faces.count : 0;
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1 change: 1 addition & 0 deletions ufbx/src/ufbx_wrapper.h
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Expand Up @@ -82,6 +82,7 @@ const float* ufbx_wrapper_mesh_get_vertex_tangents(const ufbx_mesh *mesh, size_t
const float* ufbx_wrapper_mesh_get_vertex_bitangents(const ufbx_mesh *mesh, size_t *out_count);
const float* ufbx_wrapper_mesh_get_vertex_colors(const ufbx_mesh *mesh, size_t *out_count);
const uint32_t* ufbx_wrapper_mesh_get_indices(const ufbx_mesh *mesh, size_t *out_count);
const uint32_t* ufbx_wrapper_mesh_get_uv_indices(const ufbx_mesh *mesh, size_t *out_count);

// Mesh face data
size_t ufbx_wrapper_mesh_get_face_count(const ufbx_mesh *mesh);
Expand Down