Indexer plugin from Metasequoia SDK samples modified to display index only for selected faces and vertices.

Indexer.cpp

//---------------------------------------------------------------------------
//
//   Indexer
//
//          Copyright(C) 2012-2013, tetraface Inc.
//
//
//---------------------------------------------------------------------------

#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <vector>
#include "MQBasePlugin.h"

HINSTANCE hInstance;


//---------------------------------------------------------------------------
//  DllMain
//---------------------------------------------------------------------------
BOOL APIENTRY DllMain( HANDLE hModule, 
                       DWORD  ul_reason_for_call, 
                       LPVOID lpReserved
					 )
{
	//ダイアログボックスの表示に必要なので、インスタンスを保存しておく
	hInstance = (HINSTANCE)hModule;

	//プラグインとしては特に必要な処理はないので、何もせずにTRUEを返す
    return TRUE;
}


class IndexerPlugin : public MQStationPlugin
{
public:
	// コンストラクタ
	IndexerPlugin();

	// プラグインIDを返す。
	virtual void GetPlugInID(DWORD *Product, DWORD *ID);
	// プラグイン名を返す。
	virtual const char *GetPlugInName(void);
	// ポップアップメニューに表示される文字列を返す。
	virtual const char *EnumString(void);
	// アプリケーションの初期化
	virtual BOOL Initialize();
	// アプリケーションの終了
	virtual void Exit();
	// 表示・非表示切り替え要求
	virtual BOOL Activate(MQDocument doc, BOOL flag);
	// 表示・非表示状態の返答
	virtual BOOL IsActivated(MQDocument doc);
	// 描画時の処理
	virtual void OnDraw(MQDocument doc, MQScene scene, int width, int height);
	// カレントオブジェクトの変更時
	virtual void OnUpdateObjectList(MQDocument doc);

protected:
	// コールバックに対する実装部
	virtual bool ExecuteCallback(MQDocument doc, void *option);

private:
	bool m_bVertIndex;
	bool m_bFaceIndex;
};


//---------------------------------------------------------------------------
//  GetPluginClass
//    プラグインのベースクラスを返す
//---------------------------------------------------------------------------
MQBasePlugin *GetPluginClass()
{
	static IndexerPlugin plugin;
	return &plugin;
}

//---------------------------------------------------------------------------
//  IndexerPlugin::IndexerPlugin
//    コンストラクタ
//---------------------------------------------------------------------------
IndexerPlugin::IndexerPlugin()
{
	m_bVertIndex = false;
	m_bFaceIndex = false;
}


//---------------------------------------------------------------------------
//  IndexerPlugin::GetPlugInID
//    プラグインIDを返す。
//---------------------------------------------------------------------------
void IndexerPlugin::GetPlugInID(DWORD *Product, DWORD *ID)
{
	// プロダクト名(制作者名)とIDを、全部で64bitの値として返す
	// 値は他と重複しないようなランダムなもので良い
	*Product = 0x56A31D20;
	*ID      = 0x364AF702;
}

//---------------------------------------------------------------------------
//  IndexerPlugin::GetPlugInName
//    プラグイン名を返す。
//---------------------------------------------------------------------------
const char *IndexerPlugin::GetPlugInName(void)
{
	// プラグイン名
	return "Indexer       Copyright(C) 2012-2013, tetraface Inc.";
}

//---------------------------------------------------------------------------
//  IndexerPlugin::EnumString
//    ボタンに表示される文字列を返す。
//---------------------------------------------------------------------------
const char *IndexerPlugin::EnumString(void)
{
	return "Indexer";
}

//---------------------------------------------------------------------------
//  IndexerPlugin::Initialize
//    アプリケーションの初期化
//---------------------------------------------------------------------------
BOOL IndexerPlugin::Initialize()
{
	return TRUE;
}

//---------------------------------------------------------------------------
//  IndexerPlugin::Exit
//    アプリケーションの終了
//---------------------------------------------------------------------------
void IndexerPlugin::Exit()
{
	// Nothing to do.
	// 特に何もしない
}

//---------------------------------------------------------------------------
//  SingleMovePlugin::Activate
//    表示・非表示切り替え要求
//---------------------------------------------------------------------------
BOOL IndexerPlugin::Activate(MQDocument doc, BOOL flag)
{
	m_bVertIndex = flag ? true : false;
	m_bFaceIndex = flag ? true : false;

	MQ_RefreshView(NULL);
	
	return flag;
}

BOOL IndexerPlugin::IsActivated(MQDocument doc)
{
	return m_bVertIndex || m_bFaceIndex;
}



//---------------------------------------------------------------------------
//  IndexerPlugin::OnDraw
//    描画時の処理
//---------------------------------------------------------------------------
void IndexerPlugin::OnDraw(MQDocument doc, MQScene scene, int width, int height)
{
	static const int ch0[] = {1,3, 2,2, 2,-2, 1,-3, -1,-3, -2,-2, -2,2, -1,3, 1,3, INT_MIN,INT_MIN};
	static const int ch1[] = {0,3, 0,-3, INT_MIN,INT_MIN};
	static const int ch2[] = {-2,2, -1,3, 1,3, 2,2, 2,1, 1,0, -1,0, -2,-1, -2,-3, 2,-3, INT_MIN,INT_MIN};
	static const int ch3[] = {-2,2, -1,3, 1,3, 2,2, 2,1, 1,0, -1,0, 1,0, 2,-1, 2,-2, 1,-3, -1,-3, -2,-2, INT_MIN,INT_MIN};
	static const int ch4[] = {2,-1, -2,-1, -2,1, 0,3, 1,3, 1,-3, INT_MIN,INT_MIN};
	static const int ch5[] = {2,3, -2,3, -2,1, 1,1, 2,0, 2,-2, 1,-3, -1,-3, -2,-2, INT_MIN,INT_MIN};
	static const int ch6[] = {2,2, 1,3, -1,3, -2,2, -2,-2, -1,-3, 1,-3, 2,-2, 2,-1, 1,0, -2,-0, INT_MIN,INT_MIN};
	static const int ch7[] = {-2,3, 2,3, 0,-3, INT_MIN,INT_MIN};
	static const int ch8[] = {1,0, 2,1, 2,2, 1,3, -1,3, -2,2, -2,1, -1,0, -2,-1, -2,-2, -1,-3, 1,-3, 2,-2, 2,-1, 1,0, -1,0, INT_MIN,INT_MIN};
	static const int ch9[] = {2,1, 1,0, -1,0, -2,1, -2,2, -1,3, 1,3, 2,2, 2,-2, 1,-3, -1,-3, -2,-2, INT_MIN,INT_MIN};
	static const int *chara[10] = {ch0, ch1, ch2, ch3, ch4, ch5, ch6, ch7, ch8, ch9};

	if(m_bFaceIndex){
		int curidx = doc->GetCurrentObjectIndex();
		MQObject obj = (curidx >= 0) ? doc->GetObject(curidx) : NULL;
		if(obj != NULL){
			MQObject draw = CreateDrawingObject(doc, DRAW_OBJECT_LINE);
			draw->SetColor(MQColor(1,1,0));
			draw->SetColorValid(TRUE);

			int fc = obj->GetFaceCount();
			for(int fi=0; fi<fc; fi++){
				if(!doc->IsSelectFace(curidx, fi)) continue;
				int count = obj->GetFacePointCount(fi);
				if(count > 0){
					MQPoint p(0,0,0);
					std::vector<int> index(count);
					obj->GetFacePointArray(fi, &(*index.begin()));

					for(int j=0; j<count; j++){
						p += obj->GetVertex(index[j]);
					}
					p /= (float)count;

					char str[16];
					sprintf_s(str, _countof(str), "%d", fi);

					MQPoint sp = scene->Convert3DToScreen(p);
					float spx = floor(sp.x+0.5f) + 0.01f;
					float spy = floor(sp.y+0.5f) + 0.01f;
					for(size_t s=0; str[s] != '\0'; s++){
						int n = str[s] - '0';
						for(int i=0; chara[n][i]!=INT_MIN; i+=2){
							MQPoint newvp = scene->ConvertScreenTo3D(MQPoint(spx+chara[n][i]+s*6, spy-chara[n][i+1], scene->GetFrontZ()));
							int vi = draw->AddVertex(newvp);
							if(i > 0){
								int index[2];
								index[0] = vi-1;
								index[1] = vi;
								draw->AddFace(2, index);
							}
						}
					}
				}
			}
		}
	}

	if(m_bVertIndex){
		int curidx = doc->GetCurrentObjectIndex();
		MQObject obj = (curidx >= 0) ? doc->GetObject(curidx) : NULL;
		if(obj != NULL){
			MQObject draw = CreateDrawingObject(doc, DRAW_OBJECT_LINE);
			draw->SetColor(MQColor(0,1,1));
			draw->SetColorValid(TRUE);

			int vc = obj->GetVertexCount();
			for(int vi=0; vi<vc; vi++){
				if(obj->GetVertexRefCount(vi) == 0) continue;
				if (!doc->IsSelectVertex(curidx, vi)) continue;
				MQPoint p = obj->GetVertex(vi);
				
				char str[16];
				sprintf_s(str, _countof(str), "%d", vi);

				MQPoint sp = scene->Convert3DToScreen(p);
				float spx = floor(sp.x+0.5f) + 4.001f;
				float spy = floor(sp.y+0.5f) + 0.001f;
				for(size_t s=0; str[s] != '\0'; s++){
					int n = str[s] - '0';
					for(int i=0; chara[n][i]!=INT_MIN; i+=2){
						MQPoint newvp = scene->ConvertScreenTo3D(MQPoint(spx+chara[n][i]+s*6, spy-chara[n][i+1], scene->GetFrontZ()));
						int vi = draw->AddVertex(newvp);
						if(i > 0){
							int index[2];
							index[0] = vi-1;
							index[1] = vi;
							draw->AddFace(2, index);
						}
					}
				}
			}
		}
	}
}


void IndexerPlugin::OnUpdateObjectList(MQDocument doc)
{
	if(m_bVertIndex || m_bFaceIndex){
		MQ_RefreshView(NULL);
	}
}

bool IndexerPlugin::ExecuteCallback(MQDocument doc, void *option)
{
	return false;
}