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496 lines (372 loc) · 11.2 KB
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#include "UnrealEnginePythonPrivatePCH.h"
#include "PythonComponent.h"
UPythonComponent::UPythonComponent()
{
// Set this component to be initialized when the game starts, and to be ticked every frame. You can turn these features
// off to improve performance if you don't need them.
#if ENGINE_MINOR_VERSION < 14
bWantsBeginPlay = true;
#endif
PrimaryComponentTick.bCanEverTick = true;
PythonTickForceDisabled = false;
PythonDisableAutoBinding = false;
}
void UPythonComponent::InitializePythonComponent() {
if (PythonModule.IsEmpty())
return;
FScopePythonGIL gil;
py_uobject = ue_get_python_wrapper(this);
if (!py_uobject) {
unreal_engine_py_log_error();
return;
}
PyObject *py_component_module = PyImport_ImportModule(TCHAR_TO_UTF8(*PythonModule));
if (!py_component_module) {
unreal_engine_py_log_error();
return;
}
#if WITH_EDITOR
// todo implement autoreload with a dictionary of module timestamps
py_component_module = PyImport_ReloadModule(py_component_module);
if (!py_component_module) {
unreal_engine_py_log_error();
return;
}
#endif
if (PythonClass.IsEmpty())
return;
PyObject *py_component_module_dict = PyModule_GetDict(py_component_module);
PyObject *py_component_class = PyDict_GetItemString(py_component_module_dict, TCHAR_TO_UTF8(*PythonClass));
if (!py_component_class) {
UE_LOG(LogPython, Error, TEXT("Unable to find class %s in module %s"), *PythonClass, *PythonModule);
return;
}
py_component_instance = PyObject_CallObject(py_component_class, NULL);
if (!py_component_instance) {
unreal_engine_py_log_error();
return;
}
py_uobject->py_proxy = py_component_instance;
PyObject_SetAttrString(py_component_instance, (char *)"uobject", (PyObject *)py_uobject);
// disable ticking if no tick method is exposed
if (!PyObject_HasAttrString(py_component_instance, (char *)"tick") || PythonTickForceDisabled) {
SetComponentTickEnabled(false);
}
if (!PythonDisableAutoBinding)
ue_autobind_events_for_pyclass(py_uobject, py_component_instance);
if (!PyObject_HasAttrString(py_component_instance, (char *)"begin_play")) {
return;
}
PyObject *bp_ret = PyObject_CallMethod(py_component_instance, (char *)"begin_play", NULL);
if (!bp_ret) {
unreal_engine_py_log_error();
return;
}
Py_DECREF(bp_ret);
}
// Called when the game starts
void UPythonComponent::BeginPlay()
{
Super::BeginPlay();
// ...
InitializePythonComponent();
}
void UPythonComponent::EndPlay(const EEndPlayReason::Type EndPlayReason)
{
if (!py_component_instance)
return;
FScopePythonGIL gil;
if (!PyObject_HasAttrString(py_component_instance, (char *)"end_play")) {
return;
}
PyObject *bp_ret = PyObject_CallMethod(py_component_instance, (char *)"end_play", NULL);
if (!bp_ret) {
unreal_engine_py_log_error();
return;
}
Py_DECREF(bp_ret);
Super::EndPlay(EndPlayReason);
}
// Called every frame
void UPythonComponent::TickComponent(float DeltaTime, ELevelTick TickType, FActorComponentTickFunction* ThisTickFunction)
{
Super::TickComponent(DeltaTime, TickType, ThisTickFunction);
if (!py_component_instance)
return;
FScopePythonGIL gil;
// no need to check for method availability, we did it in begin_play
PyObject *ret = PyObject_CallMethod(py_component_instance, (char *)"tick", (char *)"f", DeltaTime);
if (!ret) {
unreal_engine_py_log_error();
return;
}
Py_DECREF(ret);
}
void UPythonComponent::CallPythonComponentMethod(FString method_name, FString args)
{
if (!py_component_instance)
return;
FScopePythonGIL gil;
PyObject *ret = nullptr;
if (args.IsEmpty()) {
ret = PyObject_CallMethod(py_component_instance, TCHAR_TO_UTF8(*method_name), NULL);
}
else {
ret = PyObject_CallMethod(py_component_instance, TCHAR_TO_UTF8(*method_name), (char *)"s", TCHAR_TO_UTF8(*args));
}
if (!ret) {
unreal_engine_py_log_error();
return;
}
Py_DECREF(ret);
}
void UPythonComponent::SetPythonAttrObject(FString attr, UObject *object)
{
if (!py_component_instance)
return;
FScopePythonGIL gil;
ue_PyUObject *py_obj = ue_get_python_wrapper(object);
if (!py_obj) {
PyErr_Format(PyExc_Exception, "PyUObject is in invalid state");
unreal_engine_py_log_error();
return;
}
if (PyObject_SetAttrString(py_component_instance, TCHAR_TO_UTF8(*attr), (PyObject *)py_obj) < 0) {
UE_LOG(LogPython, Error, TEXT("Unable to set attribute %s"), *attr);
}
}
void UPythonComponent::SetPythonAttrString(FString attr, FString s)
{
if (!py_component_instance)
return;
FScopePythonGIL gil;
if (PyObject_SetAttrString(py_component_instance, TCHAR_TO_UTF8(*attr), PyUnicode_FromString(TCHAR_TO_UTF8(*s))) < 0) {
UE_LOG(LogPython, Error, TEXT("Unable to set attribute %s"), *attr);
}
}
void UPythonComponent::SetPythonAttrFloat(FString attr, float f)
{
if (!py_component_instance)
return;
FScopePythonGIL gil;
if (PyObject_SetAttrString(py_component_instance, TCHAR_TO_UTF8(*attr), PyFloat_FromDouble(f)) < 0) {
UE_LOG(LogPython, Error, TEXT("Unable to set attribute %s"), *attr);
}
}
void UPythonComponent::SetPythonAttrInt(FString attr, int n)
{
if (!py_component_instance)
return;
FScopePythonGIL gil;
if (PyObject_SetAttrString(py_component_instance, TCHAR_TO_UTF8(*attr), PyLong_FromLong(n)) < 0) {
UE_LOG(LogPython, Error, TEXT("Unable to set attribute %s"), *attr);
}
}
void UPythonComponent::SetPythonAttrVector(FString attr, FVector vec)
{
if (!py_component_instance)
return;
FScopePythonGIL gil;
if (PyObject_SetAttrString(py_component_instance, TCHAR_TO_UTF8(*attr), py_ue_new_fvector(vec)) < 0) {
UE_LOG(LogPython, Error, TEXT("Unable to set attribute %s"), *attr);
}
}
void UPythonComponent::SetPythonAttrRotator(FString attr, FRotator rot)
{
if (!py_component_instance)
return;
FScopePythonGIL gil;
if (PyObject_SetAttrString(py_component_instance, TCHAR_TO_UTF8(*attr), py_ue_new_frotator(rot)) < 0) {
UE_LOG(LogPython, Error, TEXT("Unable to set attribute %s"), *attr);
}
}
void UPythonComponent::SetPythonAttrBool(FString attr, bool b)
{
if (!py_component_instance)
return;
FScopePythonGIL gil;
PyObject *py_bool = Py_False;
if (b) {
py_bool = Py_True;
}
if (PyObject_SetAttrString(py_component_instance, TCHAR_TO_UTF8(*attr), py_bool) < 0) {
UE_LOG(LogPython, Error, TEXT("Unable to set attribute %s"), *attr);
}
}
bool UPythonComponent::CallPythonComponentMethodBool(FString method_name, FString args)
{
if (!py_component_instance)
return false;
FScopePythonGIL gil;
PyObject *ret = nullptr;
if (args.IsEmpty()) {
ret = PyObject_CallMethod(py_component_instance, TCHAR_TO_UTF8(*method_name), NULL);
}
else {
ret = PyObject_CallMethod(py_component_instance, TCHAR_TO_UTF8(*method_name), (char *)"s", TCHAR_TO_UTF8(*args));
}
if (!ret) {
unreal_engine_py_log_error();
return false;
}
if (PyObject_IsTrue(ret)) {
Py_DECREF(ret);
return true;
}
Py_DECREF(ret);
return false;
}
float UPythonComponent::CallPythonComponentMethodFloat(FString method_name, FString args)
{
if (!py_component_instance)
return 0;
FScopePythonGIL gil;
PyObject *ret = nullptr;
if (args.IsEmpty()) {
ret = PyObject_CallMethod(py_component_instance, TCHAR_TO_UTF8(*method_name), NULL);
}
else {
ret = PyObject_CallMethod(py_component_instance, TCHAR_TO_UTF8(*method_name), (char *)"s", TCHAR_TO_UTF8(*args));
}
if (!ret) {
unreal_engine_py_log_error();
return 0;
}
float value = 0;
if (PyNumber_Check(ret)) {
PyObject *py_value = PyNumber_Float(ret);
value = PyFloat_AsDouble(py_value);
Py_DECREF(py_value);
}
Py_DECREF(ret);
return value;
}
int UPythonComponent::CallPythonComponentMethodInt(FString method_name, FString args)
{
if (!py_component_instance)
return 0;
FScopePythonGIL gil;
PyObject *ret = nullptr;
if (args.IsEmpty()) {
ret = PyObject_CallMethod(py_component_instance, TCHAR_TO_UTF8(*method_name), NULL);
}
else {
ret = PyObject_CallMethod(py_component_instance, TCHAR_TO_UTF8(*method_name), (char *)"s", TCHAR_TO_UTF8(*args));
}
if (!ret) {
unreal_engine_py_log_error();
return 0;
}
int value = 0;
if (PyNumber_Check(ret)) {
PyObject *py_value = PyNumber_Long(ret);
value = PyLong_AsLong(py_value);
Py_DECREF(py_value);
}
Py_DECREF(ret);
return value;
}
FString UPythonComponent::CallPythonComponentMethodString(FString method_name, FString args)
{
if (!py_component_instance)
return FString();
FScopePythonGIL gil;
PyObject *ret = nullptr;
if (args.IsEmpty()) {
ret = PyObject_CallMethod(py_component_instance, TCHAR_TO_UTF8(*method_name), NULL);
}
else {
ret = PyObject_CallMethod(py_component_instance, TCHAR_TO_UTF8(*method_name), (char *)"s", TCHAR_TO_UTF8(*args));
}
if (!ret) {
unreal_engine_py_log_error();
return FString();
}
PyObject *py_str = PyObject_Str(ret);
if (!py_str) {
Py_DECREF(ret);
return FString();
}
char *str_ret = PyUnicode_AsUTF8(py_str);
FString ret_fstring = FString(UTF8_TO_TCHAR(str_ret));
Py_DECREF(py_str);
return ret_fstring;
}
UObject *UPythonComponent::CallPythonComponentMethodObject(FString method_name, UObject *arg)
{
if (!py_component_instance)
return nullptr;
FScopePythonGIL gil;
PyObject *ret = nullptr;
if (!arg) {
ret = PyObject_CallMethod(py_component_instance, TCHAR_TO_UTF8(*method_name), NULL);
}
else {
PyObject *py_arg_uobject = (PyObject *)ue_get_python_wrapper(arg);
if (!py_arg_uobject) {
unreal_engine_py_log_error();
return nullptr;
}
ret = PyObject_CallMethod(py_component_instance, TCHAR_TO_UTF8(*method_name), (char *)"O", py_arg_uobject);
}
if (!ret) {
unreal_engine_py_log_error();
return nullptr;
}
if (ue_is_pyuobject(ret)) {
ue_PyUObject *py_obj = (ue_PyUObject *)ret;
return py_obj->ue_object;
}
return nullptr;
}
void UPythonComponent::CallPythonComponentMethodStringArray(FString method_name, FString args, TArray<FString> &output_strings)
{
if (!py_component_instance)
return;
output_strings.Empty();
FScopePythonGIL gil;
PyObject *ret = nullptr;
if (args.IsEmpty()) {
ret = PyObject_CallMethod(py_component_instance, TCHAR_TO_UTF8(*method_name), NULL);
}
else {
ret = PyObject_CallMethod(py_component_instance, TCHAR_TO_UTF8(*method_name), (char *)"s", TCHAR_TO_UTF8(*args));
}
if (!ret) {
unreal_engine_py_log_error();
return;
}
if (!PyList_Check(ret)) {
UE_LOG(LogPython, Error, TEXT("return value is not a list"));
return;
}
Py_ssize_t len = PyList_Size(ret);
for (Py_ssize_t i = 0; i < len; i++) {
PyObject *py_str = PyObject_Str(PyList_GetItem(ret, i));
if (!py_str) {
Py_DECREF(ret);
return;
}
char *str_ret = PyUnicode_AsUTF8(py_str);
FString ret_fstring = FString(UTF8_TO_TCHAR(str_ret));
output_strings.Add(ret_fstring);
Py_DECREF(py_str);
}
Py_DECREF(ret);
}
UPythonComponent::~UPythonComponent()
{
FScopePythonGIL gil;
ue_pydelegates_cleanup(py_uobject);
#if defined(UEPY_MEMORY_DEBUG)
if (py_component_instance && py_component_instance->ob_refcnt != 1) {
UE_LOG(LogPython, Error, TEXT("Inconsistent Python UActorComponent wrapper refcnt = %d"), py_component_instance->ob_refcnt);
}
#endif
Py_XDECREF(py_component_instance);
#if defined(UEPY_MEMORY_DEBUG)
UE_LOG(LogPython, Warning, TEXT("Python UActorComponent %p (mapped to %p) wrapper XDECREF'ed"), this, py_uobject ? py_uobject->ue_object : nullptr);
#endif
// this could trigger the distruction of the python/uobject mapper
Py_XDECREF(py_uobject);
}