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