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 IMPLEMENT_APP(MyApp)
  33
  34 // `Main program' equivalent, creating windows and returning main app frame
  35 bool MyApp::OnInit(void)
  36 {
  37   wxLog::SetTraceMask(wxTraceMessages);
  38
  39   // Create the main frame window
  40   MyFrame *frame = new MyFrame(NULL, "Cube OpenGL Demo", wxPoint(50, 50), wxSize(400, 300));
  41
  42   // Give it an icon
  43 #ifdef wx_msw
  44   frame->SetIcon(wxIcon("mondrian"));
  45 #endif
  46
  47   // Make a menubar
  48   wxMenu *fileMenu = new wxMenu;
  49
  50   fileMenu->Append(wxID_EXIT, "E&xit");
  51   wxMenuBar *menuBar = new wxMenuBar;
  52   menuBar->Append(fileMenu, "&File");
  53   frame->SetMenuBar(menuBar);
  54
  55   frame->m_canvas = new TestGLCanvas(frame, -1, wxPoint(0, 0), wxSize(200, 200));
  56
  57   InitGL();
  58
  59   // Show the frame
  60   frame->Show(TRUE);
  61
  62   return TRUE;
  63 }
  64
  65 void MyApp::InitGL(void)
  66 {
  67     /* set viewing projection */
  68     glMatrixMode(GL_PROJECTION);
  69     glFrustum(-0.5F, 0.5F, -0.5F, 0.5F, 1.0F, 3.0F);
  70
  71     /* position viewer */
  72     glMatrixMode(GL_MODELVIEW);
  73     glTranslatef(0.0F, 0.0F, -2.0F);
  74
  75     /* position object */
  76     glRotatef(30.0F, 1.0F, 0.0F, 0.0F);
  77     glRotatef(30.0F, 0.0F, 1.0F, 0.0F);
  78
  79     glEnable(GL_DEPTH_TEST);
  80     glEnable(GL_LIGHTING);
  81     glEnable(GL_LIGHT0);
  82 }
  83
  84 BEGIN_EVENT_TABLE(MyFrame, wxFrame)
  85     EVT_MENU(wxID_EXIT, MyFrame::OnExit)
  86 END_EVENT_TABLE()
  87
  88 // My frame constructor
  89 MyFrame::MyFrame(wxFrame *frame, const wxString& title, const wxPoint& pos,
  90     const wxSize& size, long style):
  91   wxFrame(frame, -1, title, pos, size, style)
  92 {
  93     m_canvas = NULL;
  94 }
  95
  96 // Intercept menu commands
  97 void MyFrame::OnExit(wxCommandEvent& event)
  98 {
  99     Destroy();
 100 }
 101
 102 bool MyFrame::OnClose(void)
 103 {
 104     return TRUE;
 105 }
 106
 107 BEGIN_EVENT_TABLE(TestGLCanvas, wxGLCanvas)
 108     EVT_SIZE(TestGLCanvas::OnSize)
 109     EVT_PAINT(TestGLCanvas::OnPaint)
 110     EVT_ERASE_BACKGROUND(TestGLCanvas::OnEraseBackground)
 111 END_EVENT_TABLE()
 112
 113 TestGLCanvas::TestGLCanvas(wxWindow *parent, wxWindowID id,
 114     const wxPoint& pos, const wxSize& size, long style, const wxString& name):
 115   wxGLCanvas(parent, id, pos, size, style, name)
 116 {
 117 }
 118
 119 TestGLCanvas::~TestGLCanvas(void)
 120 {
 121 }
 122
 123 void TestGLCanvas::OnPaint( wxPaintEvent& event )
 124 {
 125     // This is a dummy, to avoid an endless succession of paint messages.
 126     // OnPaint handlers must always create a wxPaintDC.
 127     wxPaintDC dc(this);
 128
 129     if ( !GetContext() )
 130         return;
 131
 132     SetCurrent();
 133
 134     /* clear color and depth buffers */
 135     glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 136
 137     /* draw six faces of a cube */
 138     glBegin(GL_QUADS);
 139     glNormal3f( 0.0F, 0.0F, 1.0F);
 140     glVertex3f( 0.5F, 0.5F, 0.5F); glVertex3f(-0.5F, 0.5F, 0.5F);
 141     glVertex3f(-0.5F,-0.5F, 0.5F); glVertex3f( 0.5F,-0.5F, 0.5F);
 142
 143     glNormal3f( 0.0F, 0.0F,-1.0F);
 144     glVertex3f(-0.5F,-0.5F,-0.5F); glVertex3f(-0.5F, 0.5F,-0.5F);
 145     glVertex3f( 0.5F, 0.5F,-0.5F); glVertex3f( 0.5F,-0.5F,-0.5F);
 146
 147     glNormal3f( 0.0F, 1.0F, 0.0F);
 148     glVertex3f( 0.5F, 0.5F, 0.5F); glVertex3f( 0.5F, 0.5F,-0.5F);
 149     glVertex3f(-0.5F, 0.5F,-0.5F); glVertex3f(-0.5F, 0.5F, 0.5F);
 150
 151     glNormal3f( 0.0F,-1.0F, 0.0F);
 152     glVertex3f(-0.5F,-0.5F,-0.5F); glVertex3f( 0.5F,-0.5F,-0.5F);
 153     glVertex3f( 0.5F,-0.5F, 0.5F); glVertex3f(-0.5F,-0.5F, 0.5F);
 154
 155     glNormal3f( 1.0F, 0.0F, 0.0F);
 156     glVertex3f( 0.5F, 0.5F, 0.5F); glVertex3f( 0.5F,-0.5F, 0.5F);
 157     glVertex3f( 0.5F,-0.5F,-0.5F); glVertex3f( 0.5F, 0.5F,-0.5F);
 158
 159     glNormal3f(-1.0F, 0.0F, 0.0F);
 160     glVertex3f(-0.5F,-0.5F,-0.5F); glVertex3f(-0.5F,-0.5F, 0.5F);
 161     glVertex3f(-0.5F, 0.5F, 0.5F); glVertex3f(-0.5F, 0.5F,-0.5F);
 162     glEnd();
 163
 164     SwapBuffers();
 165 }
 166
 167 void TestGLCanvas::OnSize(wxSizeEvent& event)
 168 {
 169     int width, height;
 170     GetClientSize(& width, & height);
 171
 172     if ( GetContext() )
 173         glViewport(0, 0, width, height);
 174 }
 175
 176 void TestGLCanvas::OnEraseBackground(wxEraseEvent& event)
 177 {
 178     // Do nothing, to avoid flashing.
 179 }
 180