Thanks for your answer, it solved my problem.
I used: Vector::ClampMax() and Vector::ClampMin() to limit the tangent to the value I want.

Thank,
AiMiDi

It is possible that I am alone in the problem: after I upgraded my Visual Studio 2019 to 16.9.4 version, the math.framework modules from r21 to s24 SDK could not be compiled. what should I do?

The error of the console is6>D:\C4DSDK\sdk_s22\frameworks\core.framework\source\maxon\utilities\resultbase.h(571,4): error C2079: “maxon::ResultBase<RESULT_TYPE>::_value”Use undefined class“maxon::BlendAnimationRef”
Thinks,
AiMiDi

Hi @ferdinand,
Thank you very much for your reply. Your reply solved my problem very well, thank you.

thanks again,
AiMiDi

Hi @ferdinand,

thank you so much for replying to me.I read the code you provided, and I think I didn't express it clearly.
For the key frame I circled in this picture, its tangent should be horizontal(Used Remove Overshooting), so its GetTimeRight() or GetValueRight() value should be 0 instead of the number obtained in the picture, can you understand what I said.

Thinks,
AiMiDi

When I try to use GetTimeRight() or GetValueRight() to get a key frame with Preset set to CKEYPRESET::NEWAUTO, the returned value is not the correct value (0 or some large value). How can I get the tangent of the curve, or Tell me how to calculate them by myself.

Thinks,
AiMiDi

Hello @ferdinand
Can you understand what I said? Do I need to add anything?

Thanks,
Aimidi

I want to add a few TAB gadgets to the menu bar of the window to make them aligned to the left (left-side aligned, starting from the left). Or I want to make my TAB look like
I created the layout with code. Below is the code.

Bool DocTabDialog::CreateLayout() {
	this->SetTitle("DocTab"_s);
	BaseDocument* doc = GetFirstDocument();
	GroupBeginInMenuLine();
	GroupBegin(1000, BFH_LEFT , 0, 1, ""_s, 0, 0, 0);
	GroupSpace(0, 0);
	while (doc != nullptr)//Traverse all the items and add them to the label
	{
		Int32 Index = doc_tab_dialog_arr.GetCount();
		DocTabUserArea* doc_tab_user_area = new DocTabUserArea(doc, DOC_TAB);
		C4DGadget* const userAreaGadget = this->AddUserArea(10000 + Index, BFH_LEFT , 160, 14);
		if (userAreaGadget != nullptr)
			this->AttachUserArea((*doc_tab_user_area), userAreaGadget);
		iferr(doc_tab_dialog_arr.Append(doc_tab_user_area))return false;
		doc = doc->GetNext();
	}
	addDocTab = new DocTabUserArea(nullptr, ADD_TAB);
	C4DGadget* userAreaGadget = this->AddUserArea(1001, BFH_LEFT, 30, 14);//Add "Add Tab" button
	if (userAreaGadget != nullptr)
		this->AttachUserArea((*addDocTab), userAreaGadget);
	recDocTab = new DocTabUserArea(nullptr, REC_DOC);
	userAreaGadget = this->AddUserArea(1002, BFH_LEFT, 30, 14);//Add "History document" button
	if (userAreaGadget != nullptr)
		this->AttachUserArea((*recDocTab), userAreaGadget);
	GroupEnd();
	GroupEnd();
	return true;
}

See more here.

Thanks,
Aimidi

I want to create a left-aligned group in the menu. I found GroupBeginInMenuLine() in the official documentation, but it can only align the group to the left.
I searched for this problem and it seems that this function cannot be used to create a left-aligned group.
Is there any other way to create a left-aligned group? what should I do?
The above is a plug-in that uses GroupBeginInMenuLine(), and the following is a plug-in that implements left-aligned by others.

Thank，
aimidi

Thanks for your answer, it solved my problem.

Thank,
AiMiDi

Thanks for your answer, it solved my problem.
I used: Vector::ClampMax() and Vector::ClampMin() to limit the tangent to the value I want.

Thank,
AiMiDi

I want to draw the object 2d on the screen (the front, always displayed), but my code will have problems, how can I modify it.
Now it looks like there is a problem with the drawing order? My object should be drawn last.

class Obj : public ObjectData
{
public:
	DRAWRESULT Draw(BaseObject* op, DRAWPASS drawpass, BaseDraw* bd, BaseDrawHelp* bh);
	static NodeData* Alloc() { return NewObjClear(Obj); }
};


DRAWRESULT Obj::Draw(BaseObject* op, DRAWPASS drawpass, BaseDraw* bd, BaseDrawHelp* bh) {
	if (drawpass != DRAWPASS::OBJECT)
		return DRAWRESULT::SKIP;

	if (op == nullptr || bd == nullptr || bh == nullptr)
		return DRAWRESULT::FAILURE;

	const Vector& screenSpacePos = bd->WS(op->GetMg().off);
	// set color
	bd->SetPen(Vector(255,86,137)/255);
	// draw circle
	bd->DrawCircle2D(screenSpacePos.x, screenSpacePos.y, 15);
	// draw handle
	bd->DrawHandle2D(screenSpacePos, DRAWHANDLE::BIG);
	if (bd->TestBreak())
		return DRAWRESULT::OK;

	return DRAWRESULT::OK;
}

Thank,
AiMiDi