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Fix #120697: better error for BVHTree.FromObject()

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When called on an object that you cannot get a mesh from (e.g. Empties),
you would run into an unhelpful "SystemError: <built-in method
FromObject of type object at ...> returned NULL without setting an
exception"

Now be more specific in the error message.

Pull Request: https://projects.blender.org/blender/blender/pulls/135162
This commit is contained in:
Philipp Oeser
2025-02-26 14:14:14 +01:00
committed by Philipp Oeser
parent e9dfe79054
commit d2ecf66492
1 changed files with 41 additions and 7 deletions
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48
source/blender/python/mathutils/mathutils_bvhtree.cc
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@@ -1037,6 +1037,7 @@ static const Mesh *bvh_get_mesh(const char *funcname,
const CustomData_MeshMasks data_masks = CD_MASK_BAREMESH;
const bool use_render = DEG_get_mode(depsgraph) == DAG_EVAL_RENDER;
*r_free_mesh = false;
Mesh *mesh;
/* Write the display mesh into the dummy mesh */
if (use_deform) {
@@ -1049,15 +1050,33 @@ static const Mesh *bvh_get_mesh(const char *funcname,
return nullptr;
}
mesh = blender::bke::mesh_create_eval_final(depsgraph, scene, ob, &data_masks);
if (mesh == nullptr) {
PyErr_Format(PyExc_ValueError,
"%s(...): Cannot get a mesh from object '%s'",
ob->id.name + 2,
funcname);
return nullptr;
}
*r_free_mesh = true;
return blender::bke::mesh_create_eval_final(depsgraph, scene, ob, &data_masks);
return mesh;
}
if (ob_eval != nullptr) {
if (use_cage) {
return blender::bke::mesh_get_eval_deform(depsgraph, scene, ob_eval, &data_masks);
mesh = blender::bke::mesh_get_eval_deform(depsgraph, scene, ob_eval, &data_masks);
}
return BKE_object_get_evaluated_mesh(ob_eval);
else {
mesh = BKE_object_get_evaluated_mesh(ob_eval);
}
if (mesh == nullptr) {
PyErr_Format(PyExc_ValueError,
"%s(...): Cannot get a mesh from object '%s'",
ob->id.name + 2,
funcname);
return nullptr;
}
return mesh;
}
PyErr_Format(PyExc_ValueError,
@@ -1075,9 +1094,16 @@ static const Mesh *bvh_get_mesh(const char *funcname,
funcname);
return nullptr;
}
mesh = blender::bke::mesh_create_eval_no_deform_render(depsgraph, scene, ob, &data_masks);
if (mesh == nullptr) {
PyErr_Format(PyExc_ValueError,
"%s(...): Cannot get a mesh from object '%s'",
ob->id.name + 2,
funcname);
return nullptr;
}
*r_free_mesh = true;
return blender::bke::mesh_create_eval_no_deform_render(depsgraph, scene, ob, &data_masks);
return mesh;
}
if (use_cage) {
@@ -1088,8 +1114,16 @@ static const Mesh *bvh_get_mesh(const char *funcname,
return nullptr;
}
mesh = blender::bke::mesh_create_eval_no_deform(depsgraph, scene, ob, &data_masks);
if (mesh == nullptr) {
PyErr_Format(PyExc_ValueError,
"%s(...): Cannot get a mesh from object '%s'",
ob->id.name + 2,
funcname);
return nullptr;
}
*r_free_mesh = true;
return blender::bke::mesh_create_eval_no_deform(depsgraph, scene, ob, &data_masks);
return mesh;
}
PyDoc_STRVAR(