GeData Manual


GeData is a container class. This container is used to store data of all classic data types that are supported by Cinema 4D.


A GeData object can be used to directly change the value of a parameter of a C4DAtom object:

See also C4DAtom Manual.

A BaseContainer object stores multiple values using GeData objects:

See also BaseContainer Manual.

// This example reads the "Radius" parameter of the selected sphere object using GeData.
BaseObject* object = doc->GetActiveObject();
// check if the active object is not a "Sphere" object
if (object == nullptr || object->IsInstanceOf(Osphere) == false)
return maxon::IllegalArgumentError(MAXON_SOURCE_LOCATION);
GeData data;
// access PRIM_SPHERE_RAD parameter
if (!object->GetParameter(DescID(PRIM_SPHERE_RAD), data, DESCFLAGS_GET::NONE))
return maxon::UnexpectedError(MAXON_SOURCE_LOCATION);
// check if container contains a float value
if (data.GetType() != DA_REAL)
return maxon::UnexpectedError(MAXON_SOURCE_LOCATION);
const Float radius = data.GetFloat();
Definition: c4d_baseobject.h:225
Definition: lib_description.h:330
Definition: c4d_gedata.h:83
Int32 GetType(void) const
Definition: c4d_gedata.h:407
Float GetFloat(void) const
Definition: c4d_gedata.h:439
static String FloatToString(Float32 v, Int32 vvk=-1, Int32 nnk=-3)
Definition: c4d_string.h:529
maxon::Float Float
Definition: ge_sys_math.h:66
Definition: c4d_gedata.h:41
#define Osphere
Definition: ge_prepass.h:1093
Definition: memoryallocationbase.h:67
#define ApplicationOutput(formatString,...)
Definition: debugdiagnostics.h:210
Definition: osphere.h:6
const char * doc
Definition: pyerrors.h:226
Definition: object.h:105



A GeData object stores data of a certain type.

  • GeData::SetDefault(): Sets the default value for the given data type.
  • DEFAULTVALUE: Dummy value for the constructor to initialize the object with the default value.
// Code like this is typically used in a NodeData::Init() function to make sure complex data types are initialized
BaseContainer& bc = ((BaseList2D*)node)->GetDataInstanceRef();
Dummy value for the default value GeData constructor.
Definition: c4d_gedata.h:65
Definition: c4d_basecontainer.h:47
GeData * SetData(Int32 id, const GeData &n)
Definition: c4d_basecontainer.h:255
Definition: c4d_baselist.h:2188
Definition: lib_description.h:74
Definition: node.h:10
If the type is not set, GeData::GetType() returns DA_NIL.
// Using GetType() it is possible to check if the returned value is of the expected type.
GeData data;
const Bool success = sphere->GetParameter(DescID(PRIM_SPHERE_RAD), data, DESCFLAGS_GET::NONE);
if (!success)
return maxon::UnexpectedError(MAXON_SOURCE_LOCATION);
// check type
if (data.GetType() != DA_REAL)
return maxon::UnexpectedError(MAXON_SOURCE_LOCATION);
const Float radius = data.GetFloat();
maxon::Bool Bool
Definition: ge_sys_math.h:55


The GeData class offers access functions for all supported data types. "Set" functions set the value and also change the data type if needed. "Get" functions return the value and are only allowed to be used if the data type matches.

Int32 and Bool data (data type DA_LONG):

Int64 data (data type DA_LLONG):

Float data (data type DA_REAL):

See also Primitive Data Types Manual (Classic).

Void pointers (data type DA_VOID):

// This example stores a void pointer in a GeData object.
GeData data;
// ...
SomeObject* const obj = static_cast<SomeObject*>(data.GetVoid());
void * GetVoid(void) const
Definition: c4d_gedata.h:445
void SetVoid(void *v)
Definition: c4d_gedata.h:585
PyObject * obj
Definition: complexobject.h:60
In general it is not recommended to use "raw" pointers, instead see BaseLink Manual.

Raw memory (data type DA_BYTEARRAY):

// This example stores some raw memory in a GeData object.
GeData geData;
geData.SetMemory(memory, memSize);
const Char* const data = (Char*)geData.GetMemory(count);
if (data != nullptr)
output.SetCString(data, count);
Py_ssize_t count
Definition: abstract.h:640
void * GetMemory(Int &count)
Definition: c4d_gedata.h:546
void SetMemory(void *data, Int count)
Definition: c4d_gedata.h:592
Definition: c4d_string.h:39
Py_ssize_t char * output
Definition: unicodeobject.h:985
maxon::Char Char
Definition: ge_sys_math.h:56
maxon::Int Int
Definition: ge_sys_math.h:64

Vector objects (data type DA_VECTOR):

See also Vector Manual (Classic).

Matrix objects (data type DA_MATRIX):

See also Matrix Manual (Classic).

String objects and C4DUuid objects (data type DA_STRING):

See also String Manual (Classic).

Filename objects (data type DA_FILENAME):

See also Filename Manual.

C4DUuid objects: (data type DA_UUID):

BaseTime objects (data type DA_TIME):

See also BaseTime Manual.

Tristate (data type DA_TRISTATE):

See also TriState Manual.

BaseContainer objects (data type DA_CONTAINER):

// This example stores a BaseContainer in a GeData object.
GeData data;
// store BaseContainer
bc.InsData(100, "foobar");
// access stored BaseContainer
if (bc == nullptr)
return maxon::UnexpectedError(MAXON_SOURCE_LOCATION);
ApplicationOutput("Container Content: " + bc->GetData(100).GetString());
const GeData & GetData(Int32 id) const
Definition: c4d_basecontainer.h:262
GeData * InsData(Int32 id, const GeData &n)
Definition: c4d_basecontainer.h:238
const String & GetString(void) const
Definition: c4d_gedata.h:463
void SetContainer(const BaseContainer &v)
Definition: c4d_gedata.h:645
BaseContainer * GetContainer(void) const
Definition: c4d_gedata.h:487
Definition: apibase.h:2814

See also BaseContainer Manual.

BaseLink objects (data type DA_ALIASLINK):

See also BaseLink Manual.

Custom data types:

// This example accesses a custom data type value from a GeData object.
// get data
GeData data;
if (!activeTag->GetParameter(DescLevel(EXPRESSION_PRIORITY), data, DESCFLAGS_GET::NONE))
return maxon::UnexpectedError(MAXON_SOURCE_LOCATION);
// get custom data type value
PriorityData* const priorityData = static_cast<PriorityData*>(customData);
if (priorityData == nullptr)
return maxon::UnexpectedError(MAXON_SOURCE_LOCATION);
// edit data
activeTag->SetParameter(DescLevel(EXPRESSION_PRIORITY), data, DESCFLAGS_SET::NONE);
CustomDataType * GetCustomDataType(Int32 datatype) const
Definition: c4d_gedata.h:507
Priority custom data type (CUSTOMGUI_PRIORITY_DATA).
Definition: customgui_priority.h:80
Bool SetPriorityValue(Int32 lValueID, const GeData &data)
Priority custom data type ID.
Definition: customgui_priority.h:23
Bool Camera dependent.
Definition: customgui_priority.h:36
Base class for custom data types.
Definition: c4d_customdatatype.h:51
Represents a level within a DescID.
Definition: lib_description.h:289
Definition: texpression.h:6


The data of one GeData object can easily be copied to another object:

// This example copies the data from one GeData
// object to another.
GeData stringData { "foobar" };
GeData intData(100);
stringData.CopyData(&intData, nullptr);
// check if container contains a String
if (intData.GetType() == DA_STRING)
ApplicationOutput("Data: " + intData.GetString());
Definition: c4d_gedata.h:47


A GeData object can be cleared.

// This example stores a String in the given GeData object just do delete it.
GeData data { "foobar" };
// check if container contains a String
if (data.GetType() == DA_STRING)
ApplicationOutput("data contains a string"_s);
// check if data has no type (data is not set)
if (data.GetType() == DA_NIL)
ApplicationOutput("data is empty"_s);
void Free(void)
Deletes the internal data and sets the type to DA_NIL.
Definition: c4d_gedata.h:337
No value.
Definition: c4d_gedata.h:38


Two GeData objects can be compared with the usual operators:

// This example compares two GeData objects with the "same" value but different types.
GeData intergerDataA;
GeData integerDataB;
if (intergerDataA != integerDataB)
ApplicationOutput("Data is different"_s);
void SetInt32(Int32 v)
Definition: c4d_gedata.h:573
void SetInt64(const Int64 &v)
Definition: c4d_gedata.h:579

Disc I/O

A GeData object can be stored in a HyperFile:

// This example writes a GeData value to a HyperFile.
if (hf == nullptr)
return maxon::OutOfMemoryError(MAXON_SOURCE_LOCATION);
// open HyperFile to write
return maxon::IoError(MAXON_SOURCE_LOCATION, MaxonConvert(filename, MAXONCONVERTMODE::NONE), "Could not open file."_s);
PyCompilerFlags const char * filename
Definition: ast.h:15
maxon::Url MaxonConvert(const Filename &fn, MAXONCONVERTMODE convertMode)
No check if file exists under case-sensitive drives.
Definition: ge_autoptr.h:37
Show an error dialog for any error.
// This example reads a GeData value from a HyperFile stored on disc.
if (hf == nullptr)
return maxon::OutOfMemoryError(MAXON_SOURCE_LOCATION);
// open HyperFile to read
if (hf->Open(456, filename, FILEOPEN::READ, FILEDIALOG::ANY))
GeData data;
// check if container contains a String
if (data.GetType() == DA_STRING)
ApplicationOutput("Loaded GeData String: " + data.GetString());
return maxon::IoError(MAXON_SOURCE_LOCATION, MaxonConvert(filename, MAXONCONVERTMODE::NONE), "Could not open file."_s);
Open the file for reading.

Further Reading