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사이트에서 공부해보세요
opengl 님이 쓰신 글 :
:
: Opengl을 보고 있는데.. 그림이 그려지질 않습니다.
: 일단, 선만이라도 그려보고 싶은데...
: 초기화는 제대로 된건지, 어떤 부분이 잘못됐는지 잘 모르겠습니다.
:
: QnA 에서 어떤분이 Opengl 초기화 하는법에 대해서 질문 올린것을 그대로 해보았습니다.
: 질문올린 분께서는 하얀화면과 검은화면이 깜박인다고 하시는데.. 저는 검은 화면만 보입니다.
:
: 질문에 답을 다신 분은 glFlush();를 초기화하는 부분에만 적용해보라고 하셨는데..
: 그렇게도 해보았는데도, 여전히 검은 화면만 보입니다.
:
: 내공이 부족한지라, 인터넷 검색을 해보아도 잘 이해가 안되네요..
: 가르침 부탁드립니다...
:
:
: //---------------------------------------------------------------------------
: //---------------------------------------------------------------------------
: //---------------------------------------------------------------------------
: class TForm3 : public TForm
: {
: __published: // IDE-managed Components
: void __fastcall FormClose(TObject *Sender, TCloseAction &Action);
: void __fastcall FormCloseQuery(TObject *Sender, bool &CanClose);
: void __fastcall FormCreate(TObject *Sender);
: void __fastcall FormDestroy(TObject *Sender);
: void __fastcall FormShow(TObject *Sender);
: void __fastcall FormResize(TObject *Sender);
: void __fastcall FormPaint(TObject *Sender);
: private: // User declarations
: HDC hdc;
: HGLRC hrc;
: int PixelFormat;
:
: public: // User declarations
: __fastcall TForm3(TComponent* Owner);
:
: void __fastcall RenderGLScene();
: void __fastcall SetupRC();
: void __fastcall SetPixelFormatDescriptor();
: void __fastcall RenderScene();
:
: };
: //---------------------------------------------------------------------------
: extern PACKAGE TForm3 *Form3;
: //---------------------------------------------------------------------------
: //---------------------------------------------------------------------------
: //---------------------------------------------------------------------------
:
:
: //---------------------------------------------------------------------------
: //---------------------------------------------------------------------------
: //---------------------------------------------------------------------------
: __fastcall TForm3::TForm3(TComponent* Owner)
: : TForm(Owner)
: {
: //
: }
: //---------------------------------------------------------------------------
: void __fastcall TForm3::FormClose(TObject *Sender, TCloseAction &Action)
: {
: //
: }
: //---------------------------------------------------------------------------
: void __fastcall TForm3::FormCloseQuery(TObject *Sender, bool &CanClose)
: {
: //
: }
: //---------------------------------------------------------------------------
: void __fastcall TForm3::FormCreate(TObject *Sender)
: {
: //
: hdc = GetDC(Handle);
: SetPixelFormatDescriptor();
: hrc = wglCreateContext(hdc);
: wglMakeCurrent(hdc, hrc);
: SetupRC();
:
: }
: //---------------------------------------------------------------------------
: void __fastcall TForm3::FormDestroy(TObject *Sender)
: {
: //
: // ReleaseDC(Handle, hdc);
: wglMakeCurrent(hdc, NULL);
: wglDeleteContext(hrc);
: }
: //---------------------------------------------------------------------------
: void __fastcall TForm3::FormShow(TObject *Sender)
: {
: //
:
: }
: //---------------------------------------------------------------------------
: void __fastcall TForm3::FormResize(TObject *Sender)
: {
: //
: GLfloat nRange = 200.0f;
: glViewport(0, 0, ClientWidth, ClientHeight);
: glMatrixMode(GL_PROJECTION);
: glLoadIdentity();
:
: if (ClientWidth <= ClientHeight)
: glOrtho(-nRange, nRange, -nRange*ClientHeight/ClientWidth,
: nRange*ClientHeight/ClientWidth, -nRange, nRange);
: else
: glOrtho(-nRange*ClientWidth/ClientHeight, nRange*ClientWidth/ClientHeight,
: -nRange, nRange, -nRange, nRange);
:
: glMatrixMode(GL_MODELVIEW);
: glLoadIdentity();
:
: }
: //---------------------------------------------------------------------------
: void __fastcall TForm3::RenderGLScene()
: {
: //Place your OpenGL drawing code here
:
: RenderScene();
:
: }
: //---------------------------------------------------------------------------
: void __fastcall TForm3::SetPixelFormatDescriptor()
: {
: PIXELFORMATDESCRIPTOR pfd = {
: sizeof(PIXELFORMATDESCRIPTOR),
: 1,
: PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER,
: PFD_TYPE_RGBA,
: 24,
: 0,0,0,0,0,0,
: 0,0,
: 0,0,0,0,0,
: 32,
: 0,
: 0,
: PFD_MAIN_PLANE,
: 0,
: 0,0,0
: };
: PixelFormat = ChoosePixelFormat(hdc, &pfd);
: SetPixelFormat(hdc, PixelFormat, &pfd);
: }
: //---------------------------------------------------------------------------
: void __fastcall TForm3::SetupRC()
: {
: glClearColor(1.0f, 0.0f, 0.0f, 1.0f);
: glClear(GL_COLOR_BUFFER_BIT);
: glFlush();
: }
: //---------------------------------------------------------------------------
: void __fastcall TForm3::RenderScene()
: {
: GLfloat x,y,z,angle;
: glClear(GL_COLOR_BUFFER_BIT);
: glPushMatrix();
: glRotatef(90.0f, 1.0f, 0.0f, 0.0f);
: glRotatef(90.0f, 0.0f, 1.0f, 0.0f);
: glBegin(GL_LINE_STRIP);
: z = -20.0f;
: for(angle = 0.0f; angle <= (2.0f * GL_PI) * 3.0f; angle += 0.1f)
: {
: x = 20.0f*sin(angle);
: y = 20.0f*cos(angle);
: glVertex3f(x, y, z);
: z += 0.5f;
: }
: glEnd();
: glPopMatrix();
: glFlush();
: }
: //---------------------------------------------------------------------------
: void __fastcall TForm3::FormPaint(TObject *Sender)
: {
: RenderGLScene();
: SwapBuffers(hdc);
:
: }
: //---------------------------------------------------------------------------
: //---------------------------------------------------------------------------
: //---------------------------------------------------------------------------
:
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