Attachment 68138 Details for Bug 55675 – Modified isosurf sample from wxWidgets

Modified isosurf sample from wxWidgets

isosurf.cpp (text/plain), 5.32 KB, created by Steve on 2012-10-05 19:31:13 UTC

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Creator: Steve

Created: 2012-10-05 19:31:13 UTC

Size: 5.32 KB

patch

obsolete

>/////////////////////////////////////////////////////////////////////////////
>// Name:        isosurf.cpp
>// Purpose:     wxGLCanvas demo program
>// Author:      Brian Paul (original gltk version), Wolfram Gloger
>// Modified by: Julian Smart
>// Created:     04/01/98
>// RCS-ID:      $Id: isosurf.cpp 54693 2008-07-18 13:56:25Z VZ $
>// Copyright:   (c) Julian Smart
>// Licence:     wxWindows licence
>/////////////////////////////////////////////////////////////////////////////
>
>// 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
>
>#if !wxUSE_GLCANVAS
>    #error "OpenGL required: set wxUSE_GLCANVAS to 1 and rebuild the library"
>#endif
>
>#include "wx/timer.h"
>#include "wx/glcanvas.h"
>#include "wx/math.h"
>
>#if defined(__WXMAC__) || defined(__WXCOCOA__)
>#   ifdef __DARWIN__
>#       include <OpenGL/gl.h>
>#       include <OpenGL/glu.h>
>#   else
>#       include <gl.h>
>#       include <glu.h>
>#   endif
>#else
>#   include <GL/gl.h>
>#   include <GL/glu.h>
>#endif
>
>#include "isosurf.h"
>
>#define MAX_CONTEXTS 32
>#define SWAP_INTERVAL_MS 15
>
>static void Init(void)
>{
>    /*
>    glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
>
>    glShadeModel(GL_SMOOTH);
>    glEnable(GL_DEPTH_TEST);
>
>    glMatrixMode(GL_PROJECTION);
>    glLoadIdentity();
>    glFrustum( -1.0, 1.0, -1.0, 1.0, 5.0, 25.0 );
>
>    glMatrixMode(GL_MODELVIEW);
>    glLoadIdentity();
>    glTranslatef( 0.0, 0.0, -6.0 );
>    */
>}
>
>// The following part was written for wxWidgets 1.66
>MyFrame *frame = NULL;
>
>IMPLEMENT_APP(MyApp)
>
>// `Main program' equivalent, creating windows and returning main app frame
>bool MyApp::OnInit()
>{
>    // Create the main frame window
>    frame = new MyFrame(NULL, wxT("wxWidgets OpenGL Isosurf Sample"),
>        wxDefaultPosition, wxDefaultSize);
>
>    // Make a menubar
>    wxMenu *fileMenu = new wxMenu;
>
>    fileMenu->Append(wxID_EXIT, _T("E&xit"));
>    wxMenuBar *menuBar = new wxMenuBar;
>    menuBar->Append(fileMenu, _T("&File"));
>    frame->SetMenuBar(menuBar);
>
>  // Make a TestGLCanvas
>
>  // JACS
>#ifdef __WXMSW__
>    int *gl_attrib = NULL;
>#else
>    int gl_attrib[20] = { WX_GL_RGBA, WX_GL_MIN_RED, 1, WX_GL_MIN_GREEN, 1,
>        WX_GL_MIN_BLUE, 1, WX_GL_DEPTH_SIZE, 1,
>        WX_GL_DOUBLEBUFFER,
>#  if defined(__WXMAC__) || defined(__WXCOCOA__)
>        GL_NONE };
>#  else
>        None };
>#  endif
>#endif
>
>    int cols = (int)sqrt((float)MAX_CONTEXTS);
>    int rows = (int)ceil(MAX_CONTEXTS / (float)cols);
>    wxGridSizer *sizer = new wxGridSizer(cols, rows, 1, 1);
>    frame->SetSizer(sizer);
>    for (int i = 0; i < MAX_CONTEXTS; i++)
>    {
>        wxWindow *window = new TestGLCanvas(frame, wxID_ANY, wxDefaultPosition,
>            wxDefaultSize, 0, _T("TestGLCanvas"), gl_attrib);
>        sizer->Add(window, 0, wxEXPAND);
>    }
>
>  // Show the frame
>    sizer->Layout();
>    frame->Show(true);
>
>    wxTimer *timer = new wxTimer(frame);
>    timer->Start(SWAP_INTERVAL_MS);
>
>    Init();
>
>    return true;
>}
>
>BEGIN_EVENT_TABLE(MyFrame, wxFrame)
>    EVT_MENU(wxID_EXIT, MyFrame::OnExit)
>    EVT_TIMER(wxID_ANY, MyFrame::OnTimer)
>END_EVENT_TABLE()
>
>// My frame constructor
>MyFrame::MyFrame(wxFrame *frame, const wxString& title, const wxPoint& pos,
>    const wxSize& size, long style)
>    : wxFrame(frame, wxID_ANY, title, pos, size, style)
>{
>}
>
>MyFrame::~MyFrame()
>{
>}
>
>// Intercept menu commands
>void MyFrame::OnExit( wxCommandEvent& WXUNUSED(event) )
>{
>    // true is to force the frame to close
>    Close(true);
>}
>
>void MyFrame::OnTimer( wxTimerEvent& WXUNUSED(event) )
>{
>    Refresh();
>}
>
>/*
> * TestGLCanvas implementation
> */
>
>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, int* gl_attrib)
>    : wxGLCanvas(parent, id, gl_attrib, pos, size, style|wxFULL_REPAINT_ON_RESIZE, name)
>{
>    parent->Show(true);
>    SetCurrent();
>}
>
>wxGLContext *TestGLCanvas::GetContext()
>{
>    static wxGLContext *sharedContext = new wxGLContext(this);
>    return sharedContext;
>}
>
>void TestGLCanvas::SetCurrent()
>{
>    GetContext()->SetCurrent(*this);
>}
>
>bool painted = false;
>void TestGLCanvas::OnPaint( wxPaintEvent& WXUNUSED(event) )
>{
>    // This is a dummy, to avoid an endless succession of paint messages.
>    // OnPaint handlers must always create a wxPaintDC.
>    wxPaintDC dc(this);
>
>    // Keep track of the fact that we've now painted at least once
>    painted = true;
>
>#ifndef __WXMOTIF__
>    if (!GetContext()) return;
>#endif
>
>    SetCurrent();
>
>    // No need to do any actual paintain...
>
>    SwapBuffers();
>}
>
>void TestGLCanvas::OnSize(wxSizeEvent& event)
>{
>    // this is also necessary to update the context on some platforms
>    wxGLCanvas::OnSize(event);
>
>    // Ensure that the first paint event goes through otherwise we may crash on SetCurrent
>    if (!painted)
>        return;
>
>    // set GL viewport (not called by wxGLCanvas::OnSize on all platforms...)
>    int w, h;
>    GetClientSize(&w, &h);
>#ifndef __WXMOTIF__
>    if (GetContext())
>#endif
>    {
>        SetCurrent();
>        glViewport(0, 0, (GLint) w, (GLint) h);
>    }
>}
>
>void TestGLCanvas::OnEraseBackground( wxEraseEvent& WXUNUSED(event) )
>{
>    // Do nothing, to avoid flashing.
>}
>

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Attachments on bug 55675: 68138 | 68139 | 77499

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