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