Added GLCanvas library (Win only at present).

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@546 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

utils/glcanvas/samples/cube/cube.cpp

@@ -0,0 +1,179 @@
+/////////////////////////////////////////////////////////////////////////////
+// Name:        cube.cpp
+// Purpose:     wxGLCanvas demo program
+// Author:      Julian Smart
+// Modified by:
+// Created:     04/01/98
+// RCS-ID:      $Id$
+// Copyright:   (c) Julian Smart
+// Licence:   	wxWindows licence
+/////////////////////////////////////////////////////////////////////////////
+
+#ifdef __GNUG__
+#pragma implementation
+#pragma interface
+#endif
+
+// For compilers that support precompilation, includes "wx.h".
+#include "wx/wxprec.h"
+
+#ifdef __BORLANDC__
+#pragma hdrstop
+#endif
+
+#ifndef WX_PRECOMP
+#include "wx/wx.h"
+#endif
+
+#include "wx/log.h"
+
+#include "cube.h"
+
+// This statement initializes the whole application and calls OnInit
+MyApp myApp;
+
+IMPLEMENT_APP(MyApp)
+
+// `Main program' equivalent, creating windows and returning main app frame
+bool MyApp::OnInit(void)
+{
+  wxLog::SetTraceMask(wxTraceMessages);
+
+  // Create the main frame window
+  MyFrame *frame = new MyFrame(NULL, "Cube OpenGL Demo", wxPoint(50, 50), wxSize(400, 300));
+
+  // Give it an icon
+#ifdef wx_msw
+  frame->SetIcon(wxIcon("mondrian"));
+#endif
+
+  // Make a menubar
+  wxMenu *fileMenu = new wxMenu;
+
+  fileMenu->Append(wxID_EXIT, "E&xit");
+  wxMenuBar *menuBar = new wxMenuBar;
+  menuBar->Append(fileMenu, "&File");
+  frame->SetMenuBar(menuBar);
+
+  frame->m_canvas = new TestGLCanvas(frame, -1, wxPoint(0, 0), wxSize(200, 200));
+
+  InitGL();
+
+  // Show the frame
+  frame->Show(TRUE);
+  
+  return TRUE;
+}
+
+void MyApp::InitGL(void)
+{
+    /* set viewing projection */
+    glMatrixMode(GL_PROJECTION);
+    glFrustum(-0.5F, 0.5F, -0.5F, 0.5F, 1.0F, 3.0F);
+
+    /* position viewer */
+    glMatrixMode(GL_MODELVIEW);
+    glTranslatef(0.0F, 0.0F, -2.0F);
+
+    /* position object */
+    glRotatef(30.0F, 1.0F, 0.0F, 0.0F);
+    glRotatef(30.0F, 0.0F, 1.0F, 0.0F);
+
+    glEnable(GL_DEPTH_TEST);
+    glEnable(GL_LIGHTING);
+    glEnable(GL_LIGHT0);
+}
+
+BEGIN_EVENT_TABLE(MyFrame, wxFrame)
+    EVT_MENU(wxID_EXIT, MyFrame::OnExit)
+END_EVENT_TABLE()
+
+// My frame constructor
+MyFrame::MyFrame(wxFrame *frame, const wxString& title, const wxPoint& pos,
+    const wxSize& size, long style):
+  wxFrame(frame, -1, title, pos, size, style)
+{
+    m_canvas = NULL;
+}
+
+// Intercept menu commands
+void MyFrame::OnExit(wxCommandEvent& event)
+{
+    Destroy();
+}
+
+bool MyFrame::OnClose(void)
+{
+    return TRUE;
+}
+
+BEGIN_EVENT_TABLE(TestGLCanvas, wxGLCanvas)
+    EVT_SIZE(TestGLCanvas::OnSize)
+    EVT_PAINT(TestGLCanvas::OnPaint)
+    EVT_ERASE_BACKGROUND(TestGLCanvas::OnEraseBackground)
+END_EVENT_TABLE()
+
+TestGLCanvas::TestGLCanvas(wxWindow *parent, wxWindowID id,
+    const wxPoint& pos, const wxSize& size, long style, const wxString& name):
+  wxGLCanvas(parent, id, pos, size, style, name)
+{
+}
+
+TestGLCanvas::~TestGLCanvas(void)
+{
+}
+
+void TestGLCanvas::OnPaint( wxPaintEvent& event )
+{
+    if ( !GetContext() )
+        return;
+
+    SetCurrent();
+
+    /* clear color and depth buffers */
+    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+    /* draw six faces of a cube */
+    glBegin(GL_QUADS);
+    glNormal3f( 0.0F, 0.0F, 1.0F);
+    glVertex3f( 0.5F, 0.5F, 0.5F); glVertex3f(-0.5F, 0.5F, 0.5F);
+    glVertex3f(-0.5F,-0.5F, 0.5F); glVertex3f( 0.5F,-0.5F, 0.5F);
+
+    glNormal3f( 0.0F, 0.0F,-1.0F);
+    glVertex3f(-0.5F,-0.5F,-0.5F); glVertex3f(-0.5F, 0.5F,-0.5F);
+    glVertex3f( 0.5F, 0.5F,-0.5F); glVertex3f( 0.5F,-0.5F,-0.5F);
+
+    glNormal3f( 0.0F, 1.0F, 0.0F);
+    glVertex3f( 0.5F, 0.5F, 0.5F); glVertex3f( 0.5F, 0.5F,-0.5F);
+    glVertex3f(-0.5F, 0.5F,-0.5F); glVertex3f(-0.5F, 0.5F, 0.5F);
+
+    glNormal3f( 0.0F,-1.0F, 0.0F);
+    glVertex3f(-0.5F,-0.5F,-0.5F); glVertex3f( 0.5F,-0.5F,-0.5F);
+    glVertex3f( 0.5F,-0.5F, 0.5F); glVertex3f(-0.5F,-0.5F, 0.5F);
+
+    glNormal3f( 1.0F, 0.0F, 0.0F);
+    glVertex3f( 0.5F, 0.5F, 0.5F); glVertex3f( 0.5F,-0.5F, 0.5F);
+    glVertex3f( 0.5F,-0.5F,-0.5F); glVertex3f( 0.5F, 0.5F,-0.5F);
+
+    glNormal3f(-1.0F, 0.0F, 0.0F);
+    glVertex3f(-0.5F,-0.5F,-0.5F); glVertex3f(-0.5F,-0.5F, 0.5F);
+    glVertex3f(-0.5F, 0.5F, 0.5F); glVertex3f(-0.5F, 0.5F,-0.5F);
+    glEnd();
+
+    SwapBuffers();
+}
+
+void TestGLCanvas::OnSize(wxSizeEvent& event)
+{
+    int width, height;
+    GetClientSize(& width, & height);
+
+    if ( GetContext() )
+        glViewport(0, 0, width, height);
+}
+
+void TestGLCanvas::OnEraseBackground(wxEraseEvent& event)
+{
+    // Do nothing, to avoid flashing.
+}
+