samples/opengl/cube/cube.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        cube.cpp
   3 // Purpose:     wxGLCanvas demo program
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     04/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #if defined(__GNUG__) && !defined(__APPLE__)
  13 #pragma implementation
  14 #pragma interface
  15 #endif
  16
  17 // For compilers that support precompilation, includes "wx.h".
  18 #include "wx/wxprec.h"
  19
  20 #ifdef __BORLANDC__
  21 #pragma hdrstop
  22 #endif
  23
  24 #ifndef WX_PRECOMP
  25 #include "wx/wx.h"
  26 #endif
  27
  28 #include "cube.h"
  29
  30 #ifndef __WXMSW__     // for wxStopWatch, see remark below
  31   #if defined(__WXMAC__) && !defined(__DARWIN__)
  32     #include <utime.h>
  33     #include <unistd.h>
  34   #else
  35     #include <sys/time.h>
  36     #include <sys/unistd.h>
  37   #endif
  38 #else
  39 #include <sys/timeb.h>
  40 #endif
  41
  42 #define ID_NEW_WINDOW 10000
  43 #define ID_DEF_ROTATE_LEFT_KEY 10001
  44 #define ID_DEF_ROTATE_RIGHT_KEY 10002
  45
  46 /*----------------------------------------------------------
  47   Control to get a keycode
  48   ----------------------------------------------------------*/
  49 class ScanCodeCtrl : public wxTextCtrl
  50 {
  51 public:
  52     ScanCodeCtrl( wxWindow* parent, wxWindowID id, int code,
  53         const wxPoint& pos, const wxSize& size );
  54
  55     void OnChar( wxKeyEvent& WXUNUSED(event) )
  56     {
  57         // Do nothing
  58     }
  59
  60     void OnKeyDown(wxKeyEvent& event);
  61
  62 private:
  63
  64     // Any class wishing to process wxWidgets events must use this macro
  65     DECLARE_EVENT_TABLE()
  66 };
  67
  68 BEGIN_EVENT_TABLE( ScanCodeCtrl, wxTextCtrl )
  69     EVT_CHAR( ScanCodeCtrl::OnChar )
  70     EVT_KEY_DOWN( ScanCodeCtrl::OnKeyDown )
  71 END_EVENT_TABLE()
  72
  73 ScanCodeCtrl::ScanCodeCtrl( wxWindow* parent, wxWindowID id, int code,
  74     const wxPoint& pos, const wxSize& size )
  75     : wxTextCtrl( parent, id, wxEmptyString, pos, size )
  76 {
  77     SetValue( wxString::Format(wxT("0x%04x"), code) );
  78 }
  79
  80 void ScanCodeCtrl::OnKeyDown( wxKeyEvent& event )
  81 {
  82     SetValue( wxString::Format(wxT("0x%04x"), event.GetKeyCode()) );
  83 }
  84
  85 /*------------------------------------------------------------------
  86  Dialog for defining a keypress
  87 -------------------------------------------------------------------*/
  88
  89 class ScanCodeDialog : public wxDialog
  90 {
  91 public:
  92     ScanCodeDialog( wxWindow* parent, wxWindowID id, const int code,
  93         const wxString &descr, const wxString& title );
  94     int GetValue();
  95
  96 private:
  97
  98     ScanCodeCtrl       *m_ScanCode;
  99     wxTextCtrl         *m_Description;
 100 };
 101
 102 ScanCodeDialog::ScanCodeDialog( wxWindow* parent, wxWindowID id,
 103     const int code, const wxString &descr, const wxString& title )
 104     : wxDialog( parent, id, title, wxDefaultPosition, wxSize(96*2,76*2) )
 105 {
 106     new wxStaticText( this, wxID_ANY, _T("Scancode"), wxPoint(4*2,3*2),
 107         wxSize(31*2,12*2) );
 108     m_ScanCode = new ScanCodeCtrl( this, wxID_ANY, code, wxPoint(37*2,6*2),
 109         wxSize(53*2,14*2) );
 110
 111     new wxStaticText( this, wxID_ANY, _T("Description"), wxPoint(4*2,24*2),
 112         wxSize(32*2,12*2) );
 113     m_Description = new wxTextCtrl( this, wxID_ANY, descr, wxPoint(37*2,27*2),
 114         wxSize(53*2,14*2) );
 115
 116     new wxButton( this, wxID_OK, _T("Ok"), wxPoint(20*2,50*2), wxSize(20*2,13*2) );
 117     new wxButton( this, wxID_CANCEL, _T("Cancel"), wxPoint(44*2,50*2),
 118         wxSize(25*2,13*2) );
 119 }
 120
 121 int ScanCodeDialog::GetValue()
 122 {
 123     int code;
 124     wxString buf = m_ScanCode->GetValue();
 125     wxSscanf( buf.c_str(), _T("%i"), &code );
 126     return code;
 127 }
 128
 129 /*----------------------------------------------------------------------
 130   Utility function to get the elapsed time (in msec) since a given point
 131   in time (in sec)  (because current version of wxGetElapsedTime doesn´t
 132   works right with glibc-2.1 and linux, at least for me)
 133 -----------------------------------------------------------------------*/
 134 unsigned long wxStopWatch( unsigned long *sec_base )
 135 {
 136   unsigned long secs,msec;
 137
 138 #if defined(__WXMSW__)
 139   struct timeb tb;
 140   ftime( &tb );
 141   secs = tb.time;
 142   msec = tb.millitm;
 143 #elif defined(__WXMAC__) && !defined(__DARWIN__)
 144   wxLongLong tl = wxGetLocalTimeMillis();
 145   secs = (unsigned long) (tl.GetValue() / 1000);
 146   msec = (unsigned long) (tl.GetValue() - secs*1000);
 147 #else
 148   // think every unice has gettimeofday
 149   struct timeval tv;
 150   gettimeofday( &tv, (struct timezone *)NULL );
 151   secs = tv.tv_sec;
 152   msec = tv.tv_usec/1000;
 153 #endif
 154
 155   if( *sec_base == 0 )
 156     *sec_base = secs;
 157
 158   return( (secs-*sec_base)*1000 + msec );
 159 }
 160
 161 /*----------------------------------------------------------------
 162   Implementation of Test-GLCanvas
 163 -----------------------------------------------------------------*/
 164
 165 #if wxUSE_GLCANVAS
 166
 167 BEGIN_EVENT_TABLE(TestGLCanvas, wxGLCanvas)
 168     EVT_SIZE(TestGLCanvas::OnSize)
 169     EVT_PAINT(TestGLCanvas::OnPaint)
 170     EVT_ERASE_BACKGROUND(TestGLCanvas::OnEraseBackground)
 171     EVT_KEY_DOWN( TestGLCanvas::OnKeyDown )
 172     EVT_KEY_UP( TestGLCanvas::OnKeyUp )
 173     EVT_ENTER_WINDOW( TestGLCanvas::OnEnterWindow )
 174 END_EVENT_TABLE()
 175
 176 unsigned long  TestGLCanvas::m_secbase = 0;
 177 int            TestGLCanvas::m_TimeInitialized = 0;
 178 unsigned long  TestGLCanvas::m_xsynct;
 179 unsigned long  TestGLCanvas::m_gsynct;
 180
 181 TestGLCanvas::TestGLCanvas(wxWindow *parent, wxWindowID id,
 182     const wxPoint& pos, const wxSize& size, long style, const wxString& name)
 183     : wxGLCanvas(parent, (wxGLCanvas*) NULL, id, pos, size, style, name )
 184 {
 185     m_init = false;
 186     m_gllist = 0;
 187     m_rleft = WXK_LEFT;
 188     m_rright = WXK_RIGHT;
 189 }
 190
 191 TestGLCanvas::TestGLCanvas(wxWindow *parent, const TestGLCanvas &other,
 192     wxWindowID id, const wxPoint& pos, const wxSize& size, long style,
 193     const wxString& name )
 194     : wxGLCanvas(parent, other.GetContext(), id, pos, size, style, name)
 195 {
 196     m_init = false;
 197     m_gllist = other.m_gllist; // share display list
 198     m_rleft = WXK_LEFT;
 199     m_rright = WXK_RIGHT;
 200 }
 201
 202 TestGLCanvas::~TestGLCanvas()
 203 {
 204 }
 205
 206 void TestGLCanvas::Render()
 207 {
 208     wxPaintDC dc(this);
 209
 210 #ifndef __WXMOTIF__
 211     if (!GetContext()) return;
 212 #endif
 213
 214     SetCurrent();
 215     // Init OpenGL once, but after SetCurrent
 216     if (!m_init)
 217     {
 218         InitGL();
 219         m_init = true;
 220     }
 221
 222     glMatrixMode(GL_PROJECTION);
 223     glLoadIdentity();
 224     glFrustum(-0.5f, 0.5f, -0.5f, 0.5f, 1.0f, 3.0f);
 225     glMatrixMode(GL_MODELVIEW);
 226
 227     /* clear color and depth buffers */
 228     glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 229
 230     if( m_gllist == 0 )
 231     {
 232         m_gllist = glGenLists( 1 );
 233         glNewList( m_gllist, GL_COMPILE_AND_EXECUTE );
 234         /* draw six faces of a cube */
 235         glBegin(GL_QUADS);
 236         glNormal3f( 0.0f, 0.0f, 1.0f);
 237         glVertex3f( 0.5f, 0.5f, 0.5f); glVertex3f(-0.5f, 0.5f, 0.5f);
 238         glVertex3f(-0.5f,-0.5f, 0.5f); glVertex3f( 0.5f,-0.5f, 0.5f);
 239
 240         glNormal3f( 0.0f, 0.0f,-1.0f);
 241         glVertex3f(-0.5f,-0.5f,-0.5f); glVertex3f(-0.5f, 0.5f,-0.5f);
 242         glVertex3f( 0.5f, 0.5f,-0.5f); glVertex3f( 0.5f,-0.5f,-0.5f);
 243
 244         glNormal3f( 0.0f, 1.0f, 0.0f);
 245         glVertex3f( 0.5f, 0.5f, 0.5f); glVertex3f( 0.5f, 0.5f,-0.5f);
 246         glVertex3f(-0.5f, 0.5f,-0.5f); glVertex3f(-0.5f, 0.5f, 0.5f);
 247
 248         glNormal3f( 0.0f,-1.0f, 0.0f);
 249         glVertex3f(-0.5f,-0.5f,-0.5f); glVertex3f( 0.5f,-0.5f,-0.5f);
 250         glVertex3f( 0.5f,-0.5f, 0.5f); glVertex3f(-0.5f,-0.5f, 0.5f);
 251
 252         glNormal3f( 1.0f, 0.0f, 0.0f);
 253         glVertex3f( 0.5f, 0.5f, 0.5f); glVertex3f( 0.5f,-0.5f, 0.5f);
 254         glVertex3f( 0.5f,-0.5f,-0.5f); glVertex3f( 0.5f, 0.5f,-0.5f);
 255
 256         glNormal3f(-1.0f, 0.0f, 0.0f);
 257         glVertex3f(-0.5f,-0.5f,-0.5f); glVertex3f(-0.5f,-0.5f, 0.5f);
 258         glVertex3f(-0.5f, 0.5f, 0.5f); glVertex3f(-0.5f, 0.5f,-0.5f);
 259         glEnd();
 260
 261         glEndList();
 262     }
 263     else
 264     {
 265         glCallList(m_gllist);
 266     }
 267
 268     glFlush();
 269     SwapBuffers();
 270 }
 271
 272 void TestGLCanvas::OnEnterWindow( wxMouseEvent& WXUNUSED(event) )
 273 {
 274     SetFocus();
 275 }
 276
 277 void TestGLCanvas::OnPaint( wxPaintEvent& WXUNUSED(event) )
 278 {
 279     Render();
 280 }
 281
 282 void TestGLCanvas::OnSize(wxSizeEvent& event)
 283 {
 284     // this is also necessary to update the context on some platforms
 285     wxGLCanvas::OnSize(event);
 286
 287     // set GL viewport (not called by wxGLCanvas::OnSize on all platforms...)
 288     int w, h;
 289     GetClientSize(&w, &h);
 290 #ifndef __WXMOTIF__
 291     if (GetContext())
 292 #endif
 293     {
 294         SetCurrent();
 295         glViewport(0, 0, (GLint) w, (GLint) h);
 296     }
 297 }
 298
 299 void TestGLCanvas::OnEraseBackground(wxEraseEvent& WXUNUSED(event))
 300 {
 301   // Do nothing, to avoid flashing.
 302 }
 303
 304 void TestGLCanvas::InitGL()
 305 {
 306     SetCurrent();
 307
 308     /* set viewing projection */
 309     glMatrixMode(GL_PROJECTION);
 310     glFrustum(-0.5f, 0.5f, -0.5f, 0.5f, 1.0f, 3.0f);
 311
 312     /* position viewer */
 313     glMatrixMode(GL_MODELVIEW);
 314     glTranslatef(0.0f, 0.0f, -2.0f);
 315
 316     /* position object */
 317     glRotatef(30.0f, 1.0f, 0.0f, 0.0f);
 318     glRotatef(30.0f, 0.0f, 1.0f, 0.0f);
 319
 320     glEnable(GL_DEPTH_TEST);
 321     glEnable(GL_LIGHTING);
 322     glEnable(GL_LIGHT0);
 323 }
 324
 325 GLfloat TestGLCanvas::CalcRotateSpeed( unsigned long acceltime )
 326 {
 327   GLfloat t,v;
 328
 329   t = ((GLfloat)acceltime) / 1000.0f;
 330
 331   if( t < 0.5f )
 332     v = t;
 333   else if( t < 1.0f )
 334     v = t * (2.0f - t);
 335   else
 336     v = 0.75f;
 337
 338   return(v);
 339 }
 340
 341 GLfloat TestGLCanvas::CalcRotateAngle( unsigned long lasttime,
 342                                   unsigned long acceltime )
 343 {
 344     GLfloat t,s1,s2;
 345
 346     t = ((GLfloat)(acceltime - lasttime)) / 1000.0f;
 347     s1 = CalcRotateSpeed( lasttime );
 348     s2 = CalcRotateSpeed( acceltime );
 349
 350     return( t * (s1 + s2) * 135.0f );
 351 }
 352
 353 void TestGLCanvas::Action( long code, unsigned long lasttime,
 354                            unsigned long acceltime )
 355 {
 356     GLfloat angle = CalcRotateAngle( lasttime, acceltime );
 357
 358     if (code == m_rleft)
 359         Rotate( angle );
 360     else if (code == m_rright)
 361             Rotate( -angle );
 362 }
 363
 364 void TestGLCanvas::OnKeyDown( wxKeyEvent& event )
 365 {
 366     long evkey = event.GetKeyCode();
 367     if (evkey == 0) return;
 368
 369     if (!m_TimeInitialized)
 370     {
 371         m_TimeInitialized = 1;
 372         m_xsynct = event.m_timeStamp;
 373         m_gsynct = wxStopWatch(&m_secbase);
 374
 375         m_Key = evkey;
 376         m_StartTime = 0;
 377         m_LastTime = 0;
 378         m_LastRedraw = 0;
 379     }
 380
 381     unsigned long currTime = event.m_timeStamp - m_xsynct;
 382
 383     if (evkey != m_Key)
 384     {
 385         m_Key = evkey;
 386         m_LastRedraw = m_StartTime = m_LastTime = currTime;
 387     }
 388
 389     if (currTime >= m_LastRedraw)      // Redraw:
 390     {
 391         Action( m_Key, m_LastTime-m_StartTime, currTime-m_StartTime );
 392
 393 #if defined(__WXMAC__) && !defined(__DARWIN__)
 394         m_LastRedraw = currTime;    // wxStopWatch() doesn't work on Mac...
 395 #else
 396         m_LastRedraw = wxStopWatch(&m_secbase) - m_gsynct;
 397 #endif
 398         m_LastTime = currTime;
 399     }
 400
 401     event.Skip();
 402 }
 403
 404 void TestGLCanvas::OnKeyUp( wxKeyEvent& event )
 405 {
 406     m_Key = 0;
 407     m_StartTime = 0;
 408     m_LastTime = 0;
 409     m_LastRedraw = 0;
 410
 411     event.Skip();
 412 }
 413
 414 void TestGLCanvas::Rotate( GLfloat deg )
 415 {
 416     SetCurrent();
 417
 418     glMatrixMode(GL_MODELVIEW);
 419     glRotatef((GLfloat)deg, 0.0f, 0.0f, 1.0f);
 420     Refresh(false);
 421 }
 422
 423
 424 #endif // wxUSE_GLCANVAS
 425
 426 /* -----------------------------------------------------------------------
 427   Main Window
 428 -------------------------------------------------------------------------*/
 429
 430 BEGIN_EVENT_TABLE(MyFrame, wxFrame)
 431     EVT_MENU(wxID_EXIT, MyFrame::OnExit)
 432     EVT_MENU( ID_NEW_WINDOW, MyFrame::OnNewWindow)
 433     EVT_MENU( ID_DEF_ROTATE_LEFT_KEY, MyFrame::OnDefRotateLeftKey)
 434     EVT_MENU( ID_DEF_ROTATE_RIGHT_KEY, MyFrame::OnDefRotateRightKey)
 435 END_EVENT_TABLE()
 436
 437 // My frame constructor
 438 MyFrame::MyFrame(wxWindow *parent, const wxString& title, const wxPoint& pos,
 439     const wxSize& size, long style)
 440     : wxFrame(parent, wxID_ANY, title, pos, size, style)
 441 {
 442     m_canvas = NULL;
 443 }
 444
 445 // Intercept menu commands
 446 void MyFrame::OnExit( wxCommandEvent& WXUNUSED(event) )
 447 {
 448     // true is to force the frame to close
 449     Close(true);
 450 }
 451
 452 /*static*/ MyFrame *MyFrame::Create(MyFrame *parentFrame, bool isCloneWindow)
 453 {
 454     wxString str = wxT("wxWidgets OpenGL Cube Sample");
 455     if (isCloneWindow) str += wxT(" - Clone");
 456
 457     MyFrame *frame = new MyFrame(NULL, str, wxDefaultPosition,
 458         wxSize(400, 300));
 459
 460     // Give it an icon
 461 #ifdef __WXMSW__
 462     frame->SetIcon(wxIcon(_T("mondrian")));
 463 #endif
 464
 465     // Make a menubar
 466     wxMenu *winMenu = new wxMenu;
 467
 468     winMenu->Append(wxID_EXIT, _T("&Close"));
 469     winMenu->Append(ID_NEW_WINDOW, _T("&New") );
 470     wxMenuBar *menuBar = new wxMenuBar;
 471     menuBar->Append(winMenu, _T("&Window"));
 472
 473     winMenu = new wxMenu;
 474     winMenu->Append(ID_DEF_ROTATE_LEFT_KEY, _T("Rotate &left"));
 475     winMenu->Append(ID_DEF_ROTATE_RIGHT_KEY, _T("Rotate &right"));
 476     menuBar->Append(winMenu, _T("&Key"));
 477
 478     frame->SetMenuBar(menuBar);
 479
 480 #if wxUSE_GLCANVAS
 481     if (parentFrame)
 482     {
 483         frame->m_canvas = new TestGLCanvas( frame, parentFrame->m_canvas,
 484             wxID_ANY, wxDefaultPosition, wxDefaultSize );
 485     }
 486     else
 487     {
 488         frame->m_canvas = new TestGLCanvas(frame, wxID_ANY,
 489             wxDefaultPosition, wxDefaultSize);
 490     }
 491 #endif
 492
 493     // Show the frame
 494     frame->Show(true);
 495
 496     return frame;
 497 }
 498
 499 void MyFrame::OnNewWindow( wxCommandEvent& WXUNUSED(event) )
 500 {
 501     (void) Create(this, true);
 502 }
 503
 504 void MyFrame::OnDefRotateLeftKey( wxCommandEvent& WXUNUSED(event) )
 505 {
 506 #if wxUSE_GLCANVAS
 507     ScanCodeDialog dial( this, wxID_ANY, m_canvas->m_rleft,
 508         wxString(_T("Left")), _T("Define key") );
 509
 510     int result = dial.ShowModal();
 511
 512     if( result == wxID_OK )
 513         m_canvas->m_rleft = dial.GetValue();
 514 #endif
 515 }
 516
 517 void MyFrame::OnDefRotateRightKey( wxCommandEvent& WXUNUSED(event) )
 518 {
 519 #if wxUSE_GLCANVAS
 520     ScanCodeDialog dial( this, wxID_ANY, m_canvas->m_rright,
 521         wxString(_T("Right")), _T("Define key") );
 522
 523     int result = dial.ShowModal();
 524
 525     if( result == wxID_OK )
 526         m_canvas->m_rright = dial.GetValue();
 527 #endif
 528 }
 529
 530 /*------------------------------------------------------------------
 531   Application object ( equivalent to main() )
 532 ------------------------------------------------------------------ */
 533
 534 IMPLEMENT_APP(MyApp)
 535
 536 bool MyApp::OnInit()
 537 {
 538 #if wxUSE_LOG
 539     wxLog::SetTraceMask(wxTraceMessages);
 540 #endif
 541
 542     // Create the main frame window
 543     (void) MyFrame::Create(NULL);
 544
 545 #if wxUSE_GLCANVAS
 546
 547     return true;
 548
 549 #else
 550
 551     wxMessageBox( _T("This sample has to be compiled with wxUSE_GLCANVAS"),
 552         _T("Building error"), wxOK);
 553
 554     return false;
 555
 556 #endif
 557
 558 }