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update the samples to use new (non-deprecated) wxGLCanvas API; added more comments; some cleanup (modified patch 1882679)

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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@51630 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Vadim Zeitlin
2008-02-10 13:26:01 +00:00
parent 845035287a
commit 451c13c85c
7 changed files with 247 additions and 214 deletions
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63
samples/opengl/penguin/penguin.cpp
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@@ -94,8 +94,10 @@ MyFrame::MyFrame(wxFrame *frame, const wxString& title, const wxPoint& pos,
menuBar->Append(helpMenu, wxT("&Help"));
SetMenuBar(menuBar);
Show(true);
m_canvas = new TestGLCanvas(this, wxID_ANY, wxDefaultPosition,
wxSize(300, 300), wxSUNKEN_BORDER);
GetClientSize(), wxSUNKEN_BORDER);
}
// File|Open... command
@@ -139,10 +141,21 @@ BEGIN_EVENT_TABLE(TestGLCanvas, wxGLCanvas)
EVT_MOUSE_EVENTS(TestGLCanvas::OnMouse)
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|wxFULL_REPAINT_ON_RESIZE, name)
TestGLCanvas::TestGLCanvas(wxWindow *parent,
wxWindowID id,
const wxPoint& pos,
const wxSize& size,
long style,
const wxString& name)
: wxGLCanvas(parent, id, NULL, pos, size,
style | wxFULL_REPAINT_ON_RESIZE, name)
{
// Explicitly create a new rendering context instance for this canvas.
m_glRC = new wxGLContext(this);
// Make the new context current (activate it for use) with this canvas.
SetCurrent(*m_glRC);
m_gldata.initialized = false;
// initialize view matrix
@@ -154,6 +167,7 @@ TestGLCanvas::TestGLCanvas(wxWindow *parent, wxWindowID id,
TestGLCanvas::~TestGLCanvas()
{
delete m_glRC;
}
void TestGLCanvas::OnPaint( wxPaintEvent& WXUNUSED(event) )
@@ -161,11 +175,7 @@ void TestGLCanvas::OnPaint( wxPaintEvent& WXUNUSED(event) )
// must always be here
wxPaintDC dc(this);
#ifndef __WXMOTIF__
if (!GetContext()) return;
#endif
SetCurrent();
SetCurrent(*m_glRC);
// Initialize OpenGL
if (!m_gldata.initialized)
@@ -195,11 +205,11 @@ void TestGLCanvas::OnPaint( wxPaintEvent& WXUNUSED(event) )
SwapBuffers();
}
void TestGLCanvas::OnSize(wxSizeEvent& event)
void TestGLCanvas::OnSize(wxSizeEvent& WXUNUSED(event))
{
// this is also necessary to update the context on some platforms
wxGLCanvas::OnSize(event);
// Reset the OpenGL view aspect
// Reset the OpenGL view aspect.
// This is OK only because there is only one canvas that uses the context.
// See the cube sample for that case that multiple canvases are made current with one context.
ResetProjectionMode();
}
@@ -293,18 +303,21 @@ void TestGLCanvas::InitGL()
void TestGLCanvas::ResetProjectionMode()
{
// This is normally only necessary if there is more than one wxGLCanvas
// or more than one wxGLContext in the application.
SetCurrent(*m_glRC);
int w, h;
GetClientSize(&w, &h);
#ifndef __WXMOTIF__
if ( GetContext() )
#endif
{
SetCurrent();
glViewport(0, 0, (GLint) w, (GLint) h);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(45.0f, (GLfloat)w/h, 1.0, 100.0);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
}
// It's up to the application code to update the OpenGL viewport settings.
// In order to avoid extensive context switching, consider doing this in
// OnPaint() rather than here, though.
glViewport(0, 0, (GLint) w, (GLint) h);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(45.0f, (GLfloat)w/h, 1.0, 100.0);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
}