diff options
author | Campbell Barton <ideasman42@gmail.com> | 2009-04-19 16:46:39 +0400 |
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committer | Campbell Barton <ideasman42@gmail.com> | 2009-04-19 16:46:39 +0400 |
commit | 8d2cb5bea44f4245dd17f2d82cbd0251d8090fd5 (patch) | |
tree | b28e45f1edaf083c15d2176079836a4497685e57 /source/gameengine/Ketsji/KX_PyConstraintBinding.cpp | |
parent | 92cea7c1b1540d11ed9729bacfabd23ccb7a79c7 (diff) |
BGE Python API
This changes how the BGE classes and Python work together, which hasnt changed since blender went opensource.
The main difference is PyObjectPlus - the base class for most game engine classes, no longer inherit from PyObject, and cannot be cast to a PyObject.
This has the advantage that the BGE does not have to keep 2 reference counts valid for C++ and Python.
Previously C++ classes would never be freed while python held a reference, however this reference could be problematic eg: a GameObject that isnt in a scene anymore should not be used by python, doing so could even crash blender in some cases.
Instead PyObjectPlus has a member "PyObject *m_proxy" which is lazily initialized when python needs it. m_proxy reference counts are managed by python, though it should never be freed while the C++ class exists since it holds a reference to avoid making and freeing it all the time.
When the C++ class is free'd it sets the m_proxy reference to NULL, If python accesses this variable it will raise a RuntimeError, (check the isValid attribute to see if its valid without raising an error).
- This replaces the m_zombie bool and IsZombie() tests added recently.
In python return values that used to be..
return value->AddRef();
Are now
return value->GetProxy();
or...
return value->NewProxy(true); // true means python owns this C++ value which will be deleted when the PyObject is freed
Diffstat (limited to 'source/gameengine/Ketsji/KX_PyConstraintBinding.cpp')
-rw-r--r-- | source/gameengine/Ketsji/KX_PyConstraintBinding.cpp | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/source/gameengine/Ketsji/KX_PyConstraintBinding.cpp b/source/gameengine/Ketsji/KX_PyConstraintBinding.cpp index 34c975f6bf6..2c65c184a9c 100644 --- a/source/gameengine/Ketsji/KX_PyConstraintBinding.cpp +++ b/source/gameengine/Ketsji/KX_PyConstraintBinding.cpp @@ -381,7 +381,7 @@ static PyObject* gPyGetVehicleConstraint(PyObject* self, if (vehicle) { KX_VehicleWrapper* pyWrapper = new KX_VehicleWrapper(vehicle,PHY_GetActiveEnvironment()); - return pyWrapper; + return pyWrapper->NewProxy(true); } } @@ -440,7 +440,7 @@ static PyObject* gPyCreateConstraint(PyObject* self, KX_ConstraintWrapper* wrap = new KX_ConstraintWrapper((enum PHY_ConstraintType)constrainttype,constraintid,PHY_GetActiveEnvironment()); - return wrap; + return wrap->NewProxy(true); } |