c4d.plugins.ObjectData¶

class c4d.plugins.ObjectData¶: An object plugin class to be registered with RegisterObjectPlugin().

Note

Before starting to develop an ObjectData plugin, read ObjectData Manual and NodeData Manual before.

See also

Py-DoubleCircle, Py-Gravitation, Py-RoundedTube and Py-SpherifyModifier plugin examples.

Methods Signatures

Generic Methods

`ObjectData.AddToExecution()`	Override - By default this function returns False.
`ObjectData.Draw()`	Override - Called when the display is updated for you to display some visual element of your op in the 3D view.
`ObjectData.DrawShadow()`	Called during the shadow pass instead of the `Draw()` method.
`ObjectData.Execute()`	Override - Called at the point in the priority pipeline specified by `AddToExecution()`, or the lack thereof.
`ObjectData.GetContour()`	Override - Return a spline contour. For spline objects only.
`ObjectData.GetDimension()`	Override - Return the boundaries of your object.
`ObjectData.GetVirtualObjects()`	Override - Return an object chain of a generator object (e.g. a polygonal object).
`ObjectData.SetOptimizeCache()`	Call to optimize the cache building of the node.

Handle Methods

`ObjectData.DetectHandle()`	Override - Manually detect a click on a handle.
`ObjectData.GetHandle()`	Called to get the information for handle at index i. Part of the automated handle interface.
`ObjectData.GetHandleCount()`	Called to get the number of handles the object has. Part of the automated handle interface.
`ObjectData.MoveHandle()`	Override - Move a handle manually.
`ObjectData.SetHandle()`	Called to set the information for handle at index i. Part of the automated handle interface.

Modifier Specific Methods

`ObjectData.CheckDirty()`	Override - Called to check for a change manually.
`ObjectData.ModifyObject()`	Override - Called when an object plugin should modify the passed object.

Particle Specific Methods

ObjectData.ModifyParticles()

Override - Called for modifying particles. This is for particle modifiers only.

Inheritance

Parent Class:

c4d.plugins.NodeData

Methods Documentation

ObjectData.AddToExecution(self, op, list)¶

Override - By default this function returns False.

Then Cinema 4D will call Execute() at the priority specified by the user in the EXPRESSION_PRIORITY parameter of the container.

If you override this function and return True, then you can insert your own points of execution in the list by calling for example.

list.Add(op, c4d.EXECUTIONPRIORITY_ANIMATION, 0)
list.Add(op, c4d.EXECUTIONPRIORITY_GENERATOR, 0)

Parameters

op (c4d.BaseObject) – The established base object.
list (c4d.plugins.PriorityList) – The priority list to add your object’s execution points to.

Return type

bool

Returns

True if you override this function and has added stuff to list.

ObjectData.Draw(self, op, drawpass, bd, bh)¶

Override - Called when the display is updated for you to display some visual element of your op in the 3D view.

Note

This function is called in a thread context.

Please see the important information about threading.

Parameters

op (c4d.BaseObject) – The established base object.
drawpass (int) –
One of the following flags:

DRAWPASS_OBJECT

Object pass.

DRAWPASS_BOX

Box pass.

DRAWPASS_HANDLES

Handle pass.

DRAWPASS_HIGHLIGHTS

Highlights pass.

DRAWPASS_XRAY

X-Ray pass.

Warning

Only draw in DRAWPASS_HIGHLIGHTS if you really know what you are doing.

Otherwise always check the drawpass and then do not draw if it is DRAWPASS_HIGHLIGHTS.

Here is an example.
```
def Draw(self, op, drawpass, bd, bh):

    if drawpass==c4d.DRAWPASS_HIGHLIGHTS:
        return c4d.DRAWRESULT_SKIP

    # Put here your drawing operations

    return c4d.DRAWRESULT_OK
```
Warning

Only draw the object in one pass : DRAWPASS_OBJECT.

The object’s appearance may change if you draw the same object in multiple passes.
bd (c4d.BaseDraw) – The editor’s view.
bh (c4d.plugins.BaseDrawHelp) – The BaseDrawHelp editor’s view.

Return type

int

Returns

Success of drawing into the editor view:

Symbol ID	Description
DRAWRESULT_FAILURE	There was an error while drawing.
DRAWRESULT_OK	Something was drawn.
DRAWRESULT_SKIP	There was nothing to draw in the pass.

ObjectData.DrawShadow(self, op, bd, bh)¶

Called during the shadow pass instead of the Draw() method.

New in version R14.014.

Parameters

op (c4d.BaseObject) – The established base object.
bd (c4d.BaseDraw) – The editor’s view.
bh (c4d.plugins.BaseDrawHelp) – The BaseDrawHelp editor’s view.

Return type

int

Returns

Success of drawing into the editor view:

Symbol ID	Description
DRAWRESULT_FAILURE	There was an error while drawing.
DRAWRESULT_OK	Something was drawn.
DRAWRESULT_SKIP	There was nothing to draw in the pass.

ObjectData.Execute(self, op, doc, bt, priority, flags)¶

Override - Called at the point in the priority pipeline specified by AddToExecution(), or the lack thereof.

Note

This function is called in a thread context.

Please see the important information about threading.

Parameters

op (c4d.BaseObject) – The established base object.
doc (c4d.documents.BaseDocument) – The host document of the object.
bt (Optional[c4d.BaseThread]) – Currently not used.

priority (int) –

The priority of this call to Execute() in the pipeline. Standard values are:

EXECUTIONPRIORITY_INITIAL	Initial.
EXECUTIONPRIORITY_ANIMATION	Animation.
EXECUTIONPRIORITY_ANIMATION_NLA	NLA.
EXECUTIONPRIORITY_EXPRESSION	Expression.
EXECUTIONPRIORITY_DYNAMICS	Dynamics.
EXECUTIONPRIORITY_GENERATOR	Generators.
EXECUTIONPRIORITY_SCENENODE	Scene nodes.
EXECUTIONPRIORITY_FORCE	Highest priority that will ensure execution even if the execution pipeline is cancelled before. Only use this to e.g. release locks or do super-fast non-blocking operations.

flags (int) –

A combination of the following flags:

EXECUTIONFLAGS_NONE	None.
EXECUTIONFLAGS_ANIMATION	Animation is calculated.
EXECUTIONFLAGS_EXPRESSION	Expressions are calculated.
EXECUTIONFLAGS_CACHEBUILDING	Cache building is done.
EXECUTIONFLAGS_CAMERAONLY	Only camera dependent expressions shall be executed.
EXECUTIONFLAGS_INDRAG	Pipeline is done within scrubbing.
EXECUTIONFLAGS_INMOVE	Pipeline is done within moving.
EXECUTIONFLAGS_RENDER	The external renderer (Picture Viewer) is running.
EXECUTIONFLAGS_ALLOW_PRIORITYSHIFT	New in version R18: Allow to shift the priority with the priority shift tag. Private.

Return type

int

Returns

The result:

EXECUTIONRESULT_OK	OK.
EXECUTIONRESULT_USERBREAK	User break.
EXECUTIONRESULT_MEMORYERROR	Not enough memory.

ObjectData.GetContour(self, op, doc, lod, bt)¶

Override - Return a spline contour. For spline objects only.

Note

This function is called in a thread context.

Please see the important information about threading.

Note

Splines created through GetContour() are cached. So if the generator does not produce any output (e.g. when the user chose wrong settings).
It must at least return an (empty) Ospline object, otherwise Cinema 4D will try to rebuild the cache again and again.
To make this frame dependent, CheckDirty() can be overloaded to set the object dirty if a certain condition has changed.
Only return None in the case of a memory error.

Warning

Must not be overridden for non-spline objects.

Parameters

op (c4d.BaseObject) – The established base object.
doc (c4d.documents.BaseDocument) – The document containing the plugin object.
lod (int) – The level of detail.
bt (c4d.threading.BaseThread) – The calling thread.

Return type

Optional[c4d.SplineObject]

Returns

The newly allocated spline or None only in the case of a memory error.

ObjectData.GetDimension(self, op, mp, rad)¶

Override - Return the boundaries of your object.

def GetDimension(self, op, mp, rad):
    '''
    (i) When the method runs without a raised exception
    mp and rad will be internally copied, otherwise they
    are ignored.
    '''

    mp.x = self.x_size   # correct
    mp.y = self.y_size   # correct
    mp.z = self.z_size   # correct

    mp = c4d.Vector(x_size, y_size, z_size)    #!!! wrong !!! do not rebind mp!
    #this assign applies for 'rad' as well
    return

Parameters

op (c4d.BaseObject) – The established base object.
mp (c4d.Vector) – Assign the center point of the bounding box to this vector.
rad (c4d.Vector) – Assign the XYZ bounding box radius to this vector.

ObjectData.GetVirtualObjects(self, op, hh)¶

Override - Return an object chain of a generator object (e.g. a polygonal object).

Note

This function is called in a thread context.

Please see the important information about threading.

Note

Please read the Optimize Cache section at the top of this page to get in touch with the caching options.

Warning

Must not be overridden for non-generator objects.

Parameters

op (c4d.BaseObject) – The established base object.
hh (HierarchyHelp - Not implemented) –

A hierarchy helper for the operation.

Pass this to virtual objects hierarchy methods BaseObject.GetCache(), BaseObject.CheckCache(), BaseObject.GetAndCheckHierarchyClone(), BaseObject.GetHierarchyClone().

Return type

Optional[c4d.BaseObject]

Returns

The newly allocated object chain, or None if a memory error occured.

Note

Only return None in the case of a memory error.

If the generator does not produce any output (e.g. when the user chooses wrong settings) it must at least return an (empty) Onull object, otherwise Cinema 4D will try to rebuild the cache again and again.

ObjectData.SetOptimizeCache(self, cache)¶

Call to optimize the cache building of the node.

Note

This method cannot be overridden, but only be called, see ObjectData Manual for details.
Has to be called from the __init__ method of your NodeData implementation, since it is only checked just after it.

Parameters

cache (bool) –

If True, the cache of the node will only be rebuild when its data container changed.

If False, it will be rebuild more frequently.

ObjectData.DetectHandle(self, op, bd, x, y, qualifier)¶

Override - Manually detect a click on a handle.

Parameters

op (c4d.BaseObject) – The established base object.
bd (c4d.BaseDraw) – The editor’s view.
x (int) – The mouse X coordinate.
y (int) – The mouse Y coordinate.

qualifier (int) –

Any qualifier keys that were pressed. These are defined in c4d.gui:

QUALIFIER_SHIFT	SHIFT key.
QUALIFIER_CTRL	CTRL key.
QUALIFIER_MOUSEHIT	Indication in `ObjectData.DetectHandle()` that the user pressed the mouse (`ObjectData.DetectHandle()` is also called for cursor information, when hovering over a handle). For instance if QUALIFIER_MOUSEHIT and QUALIFIER_CTRL are set, `ObjectData.DetectHandle()` could create a new element.

Return type

int

Returns

The handle ID that is to be passed to MoveHandle()

ObjectData.GetHandle(self, op, i, info)¶

Called to get the information for handle at index i. Part of the automated handle interface.

New in version R18.011.

Parameters

op (c4d.BaseObject) – The established base object.
i (int) – The handle index.
info (c4d.HandleInfo) – Fill with the handle information.

ObjectData.GetHandleCount(self, op)¶

Called to get the number of handles the object has. Part of the automated handle interface.

New in version R18.011.

Parameters: op (c4d.BaseObject) – The established base object.
Return type: int
Returns: The number of handles for the object.

ObjectData.MoveHandle(self, op, undo, mouse_pos, hit_id, qualifier, bd)¶

Override - Move a handle manually.

Parameters

op (c4d.BaseObject) – The established base object.
undo (c4d.BaseObject) – This is a copy of the object that must not be modified during the move handle.
mouse_pos (c4d.Vector) – The current mouse position.
hit_id (int) – The handle ID returned from DetectHandle()

qualifier (int) –

Any qualifier keys that were pressed.

These are defined in c4d.gui:

QUALIFIER_SHIFT	SHIFT key.
QUALIFIER_CTRL	CTRL key.
QUALIFIER_MOUSEHIT	Indication in `ObjectData.DetectHandle()` that the user pressed the mouse (`ObjectData.DetectHandle()` is also called for cursor information, when hovering over a handle). For instance if QUALIFIER_MOUSEHIT and QUALIFIER_CTRL are set, `ObjectData.DetectHandle()` could create a new element.

bd (c4d.BaseDraw) – The editor’s view.

Return type

bool

Returns

Success of modifying the handle.

ObjectData.SetHandle(self, op, i, p, info)¶

Called to set the information for handle at index i. Part of the automated handle interface.

Called when the user has moved handle i to position p. Update the object’s internal data accordingly (e.g. parameter values etc).

New in version R18.011.

Parameters

op (c4d.BaseObject) – The established base object.
i (int) – The handle index.
p (c4d.Vector) – The new handle position.
info (c4d.HandleInfo) – The handle information.

ObjectData.CheckDirty(self, op, doc)¶

Override - Called to check for a change manually.

For example this will update every frame:

def CheckDirty(self, op, doc):

    frame = doc.GetTime().GetFrame(doc.GetFps())
    if frame != lastFrame:
        lastFrame = frame
        op.SetDirty(c4d.DIRTYFLAGS_DATA)

Note

This function is called in a thread context.

Please see the important information about threading.

Parameters

op (c4d.BaseObject) – The established base object.
doc (c4d.documents.BaseDocument) – The document containing the plugin object.

ObjectData.ModifyObject(self, mod, doc, op, op_mg, mod_mg, lod, flags, thread)¶

Override - Called when an object plugin should modify the passed object.

Note

This function is called in a thread context.

Please see the important information about threading.

Warning

Must not be overridden for non-modifier objects.

Parameters

mod (c4d.BaseObject) – The modifier object.
doc (c4d.documents.BaseDocument) – The document containing the plugin object.
op (c4d.BaseObject) – The object to modify.
op_mg (c4d.Matrix) – The object’s world matrix.
mod_mg (c4d.Matrix) – The modifier object’s world matrix.
lod (float) – The level of detail.
flags (int) – Currently unused.
thread (c4d.threading.BaseThread) – The calling thread.

Return type

bool

Returns

Success of modifying the object.

ObjectData.ModifyParticles(self, op, pp, ss, pcnt, diff)¶

Override - Called for modifying particles. This is for particle modifiers only.

Note

This function is called in a thread context.

Please see the important information about threading.

Parameters

op (c4d.BaseObject) – The established base object.
pp (List[c4d.modules.particles.Particle]) –
The initial element of the Particle list.

Note

This list is used to read the particles information only, the particles should not be modified.
ss (List[c4d.modules.particles.BaseParticle]) – The initial element of the BaseParticle list. Modify the elements in this list to change the velocity of the particle.
pcnt (int) – The number of particles in the Particle and BaseParticle list.
diff (float) – The time delta for the particles movement in seconds. Usually the difference in time between two frames, but this can be different for such functions as motion blur.

DRAWPASS_OBJECT	Object pass.
DRAWPASS_BOX	Box pass.
DRAWPASS_HANDLES	Handle pass.
DRAWPASS_HIGHLIGHTS	Highlights pass.
DRAWPASS_XRAY	X-Ray pass.