放一个Dynamicinputs corresponding to Dynamicknobs的Node源码

static const char* const CLASS = "AddInputsSol";

static const char* const HELP =
  "Add all the inputs together dynamic by solHe";

// Standard plug-in include files.

#include "DDImage/NoIop.h"
#include "DDImage/Op.h"
#include "DDImage/NukeWrapper.h"
using namespace DD::Image;
#include "DDImage/Row.h"
#include "DDImage/Tile.h"
#include "DDImage/Knobs.h"
#include "DDImage/ViewerContext.h"
#include <string.h>
#include "stdlib.h"

class AddInputsSol : public NoIop
{
  int first_frame;
  int last_frame;
  int _numberKnobs,_numberNewKnobs;
  int _change_bool;
  char *knoblabel,*newknoblabel,*knobname_f,*newknobname_f,*knobname_l,*newknobname_l;
  int _inputsnewnum;
  char inputs_s[20];
  char *inputs_c;
  char temp[20];
  char temp_label[20];
  int inputsnum;

  public:
  int minimum_inputs() const { return 1; }
  int maximum_inputs() const { return 100; }

  AddInputsSol(Node* node) : NoIop(node),
  first_frame(0),
  last_frame(99),
  _change_bool(0),
  knoblabel("Frame Range "),
  //newknoblabel("Frame Range"),
  knobname_f("fisrt_frame_"),
  //newknobname_f("fisrt_frame_"),
  knobname_l("last_frame_")
  //newknobname_l("last_frame_")
  {
	  _inputsnewnum = inputs();
	  _numberKnobs = 2;
	  _numberNewKnobs = _inputsnewnum * 2 - 2;
	  int inputsnum = 0;

  }

  virtual void knobs(Knob_Callback);
  //virtual void anyInputHandles(ViewerContext*);
  static void addDynamicKnobs(void*, Knob_Callback);
  int* get_first_frame() { return &first_frame; }
  int* get_last_frame() { return &last_frame; }
  char* dynamicName_label(int);
  char* dynamicName_first(int);
  char* dynamicName_last(int);
  void get_real_inputs();

  void knobs_replace(void* );    //refresh the set() of knobs.
  virtual int knob_changed(Knob* );           //used to get the state that if input number of arrow changed.

  //void _validate(bool);
  const char* Class() const { return CLASS; }
  const char* node_help() const { return HELP; }
  static const Iop::Description description;
}; 

/*
void AddInputsSol::_validate(bool for_real)
{
  copy_info();
  if(_inputsnum != _inputsnewnum)
  {
    _inputsnum = _inputsnewnum;
    knob("lastFrame")->set_value(_inputsnum);
	return;
  }
  input_changed(this->firstOp());

}
*/

void AddInputsSol::knobs(Knob_Callback f)
{
  Int_knob(f, &first_frame, "fisrt_frame_1", "Frame Range 1");
  //SetFlags(f, Knob::NO_ANIMATION);
  Int_knob(f, &last_frame, "last_frame_1", "");
  //SetFlags(f, Knob::NO_ANIMATION);

  SetFlags(f,Knob::KNOB_CHANGED_ALWAYS); //split from here to indicate that the script after here is dynamic.

  if( !f.makeKnobs() )
  {
    get_real_inputs();
  }
}

//compare number of inputs arrows and number of knobs,return a state value.
int AddInputsSol::knob_changed(Knob* k)
{
	//caluculate the real sum of inputs()

	if( _numberKnobs != 2 * inputsnum | inputsnum != inputs() )
	{
		//refresh the knob list
		_change_bool = 1;

        _numberNewKnobs = replace_knobs(knob("last_frame_1"), _numberNewKnobs, addDynamicKnobs, this->firstOp());

		_numberKnobs = 2 + _numberNewKnobs;

		return 1;
	}
	else
	{

		//nothing happen.
		_change_bool = 0;
		_numberKnobs += 0;
		get_real_inputs();
		return NoIop::knob_changed(k);
	}
}

void AddInputsSol::get_real_inputs()
{
	int i;
	int inputsnum = 0;
	for (i = 1;i <= inputs();i++)
    {
	    if( node_input(i,OUTPUT_OP) != NULL )
	    {
		    inputsnum += 1;
	    }
    }
}

void AddInputsSol::addDynamicKnobs(void* p,Knob_Callback f)
{
  if( ( ( AddInputsSol* ) p ) -> _change_bool == 1 )
  {
	//get the real number of inputs.
	( ( AddInputsSol* ) p ) -> get_real_inputs();

	//create knobs.
    int i,num;
	num = ( ( AddInputsSol* ) p ) -> inputsnum - 1;

	for ( i = 1; i <= ( ( AddInputsSol* ) p ) -> inputs() - 1; i++ )
	{
      Int_knob(f, ((AddInputsSol*) p) -> get_first_frame(), ((AddInputsSol*) p) -> dynamicName_first(i+1), ((AddInputsSol*) p) -> dynamicName_label(i+1));
      Int_knob(f, ((AddInputsSol*) p) -> get_last_frame(), ((AddInputsSol*) p) -> dynamicName_last(i+1), "");
	}
  }
}

char* AddInputsSol::dynamicName_label(int i)
{
	char* inputs_c = itoa(i,inputs_s,20);
	strcpy(temp_label,knoblabel);
	strcat(temp_label,inputs_c);
	char* newknoblabel = (LPSTR)temp_label;

	return newknoblabel;
}

char* AddInputsSol::dynamicName_first(int i)
{
	char* inputs_c = itoa(i,inputs_s,100);
    //char temp[20];
	strcpy(temp,knobname_f);
	strcat(temp,inputs_c);
	char* newknobname_f = (LPSTR)temp;

	return newknobname_f;
}

char* AddInputsSol::dynamicName_last(int i)
{
	char* inputs_c = itoa(i,inputs_s,100);
	//char temp[20];
	strcpy(temp,knobname_l);
	strcat(temp,inputs_c);
	char* newknobname_l = (LPSTR)temp;

	return newknobname_l;
}

/*! The Iop::Description is how NUKE knows what the name of the operator is,
   how to create one, and the menu item to show the user. The menu item may be
   0 if you do not want the operator to be visible.
 */

static Iop* AddInputsCreate(Node* node)
{
  return new AddInputsSol(node);
}
static Iop* build(Node* node) { return new NukeWrapper(new AddInputsSol(node)); }
const Iop::Description AddInputsSol::description ( CLASS, "AddInputsSol",
                                                     AddInputsCreate );

国内正经搞NDK开发的TD不多，相关研究文章也很少，我就放个自己写的源码做参考吧，写的很乱，希望能给看到这篇文章的人一点启发。