]> git.saurik.com Git - wxWidgets.git/blob - utils/glcanvas/samples/penguin/penguin.cpp
Removed lots of OnClose functions; doc'ed OnCloseWindow better;
[wxWidgets.git] / utils / glcanvas / samples / penguin / penguin.cpp
1 /////////////////////////////////////////////////////////////////////////////
2 // Name: penguin.cpp
3 // Purpose: wxGLCanvas demo program
4 // Author: Robert Roebling
5 // Modified by:
6 // Created: 04/01/98
7 // RCS-ID: $Id$
8 // Copyright: (c) Robert Roebling
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 "penguin.h"
29 #include <GL/glu.h>
30
31 #define VIEW_ASPECT 1.3
32
33 /* `Main program' equivalent, creating windows and returning main app frame */
34 bool MyApp::OnInit(void)
35 {
36
37 /* Create the main frame window */
38 MyFrame *frame = new MyFrame(NULL, "wxWindows OpenGL Demo", wxPoint(50, 50), wxSize(400, 300));
39
40 /* Make a menubar */
41 wxMenu *fileMenu = new wxMenu;
42
43 fileMenu->Append(wxID_EXIT, "E&xit");
44 wxMenuBar *menuBar = new wxMenuBar;
45 menuBar->Append(fileMenu, "&File");
46 frame->SetMenuBar(menuBar);
47
48 frame->m_canvas = new TestGLCanvas(frame, -1, wxPoint(0, 0), wxSize(200, 200));
49
50 /* Load file wiht mesh data */
51 frame->m_canvas->LoadLWO( "penguin.lwo" );
52
53 /* Show the frame */
54 frame->Show(TRUE);
55
56 return TRUE;
57 }
58
59 IMPLEMENT_APP(MyApp)
60
61 BEGIN_EVENT_TABLE(MyFrame, wxFrame)
62 EVT_MENU(wxID_EXIT, MyFrame::OnExit)
63 END_EVENT_TABLE()
64
65 /* My frame constructor */
66 MyFrame::MyFrame(wxFrame *frame, const wxString& title, const wxPoint& pos,
67 const wxSize& size, long style):
68 wxFrame(frame, -1, title, pos, size, style)
69 {
70 m_canvas = NULL;
71 }
72
73 /* Intercept menu commands */
74 void MyFrame::OnExit(wxCommandEvent& event)
75 {
76 Destroy();
77 }
78
79 BEGIN_EVENT_TABLE(TestGLCanvas, wxGLCanvas)
80 EVT_SIZE(TestGLCanvas::OnSize)
81 EVT_PAINT(TestGLCanvas::OnPaint)
82 EVT_ERASE_BACKGROUND(TestGLCanvas::OnEraseBackground)
83 EVT_MOUSE_EVENTS(TestGLCanvas::OnMouse)
84 END_EVENT_TABLE()
85
86 TestGLCanvas::TestGLCanvas(wxWindow *parent, wxWindowID id,
87 const wxPoint& pos, const wxSize& size, long style, const wxString& name):
88 wxGLCanvas(parent, id, pos, size, style, name)
89 {
90 block = FALSE;
91 }
92
93 TestGLCanvas::~TestGLCanvas(void)
94 {
95 /* destroy mesh */
96 lw_object_free(info.lwobject);
97 }
98
99 void TestGLCanvas::OnPaint( wxPaintEvent& event )
100 {
101 /* must always be here */
102 wxPaintDC dc(this);
103
104 #ifndef __WXMOTIF__
105 if (!GetContext()) return;
106 #endif
107
108 SetCurrent();
109
110 /* initialize OpenGL */
111 if (info.do_init == TRUE)
112 {
113 InitGL();
114 info.do_init = FALSE;
115 }
116
117 /* view */
118 glMatrixMode( GL_PROJECTION );
119 glLoadIdentity();
120 gluPerspective( info.zoom, VIEW_ASPECT, 1, 100 );
121 glMatrixMode( GL_MODELVIEW );
122
123 /* clear */
124 glClearColor( .3, .4, .6, 1 );
125 glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
126
127 /* transformations */
128 GLfloat m[4][4];
129 glLoadIdentity();
130 glTranslatef( 0, 0, -30 );
131 build_rotmatrix( m,info.quat );
132 glMultMatrixf( &m[0][0] );
133
134 /* draw object */
135 lw_object_show( info.lwobject );
136
137 /* flush */
138 glFlush();
139
140 /* swap */
141 SwapBuffers();
142 }
143
144 void TestGLCanvas::OnSize(wxSizeEvent& event)
145 {
146 int width, height;
147 GetClientSize(& width, & height);
148
149 #ifndef __WXMOTIF__
150 if (GetContext())
151 #endif
152 {
153 SetCurrent();
154 glViewport(0, 0, width, height);
155 }
156 }
157
158 void TestGLCanvas::OnEraseBackground(wxEraseEvent& event)
159 {
160 /* Do nothing, to avoid flashing on MSW */
161 }
162
163 void TestGLCanvas::LoadLWO(const wxString &filename)
164 {
165 /* test if lightwave object */
166 if (!lw_is_lwobject(filename)) return;
167
168 /* read lightwave object */
169 lwObject *lwobject = lw_object_read(filename);
170
171 /* scale */
172 lw_object_scale(lwobject, 10.0 / lw_object_radius(lwobject));
173
174 /* set up mesh info */
175 info.do_init = TRUE;
176 info.lwobject = lwobject;
177 info.beginx = 0;
178 info.beginy = 0;
179 info.zoom = 45;
180 trackball( info.quat, 0.0, 0.0, 0.0, 0.0 );
181 }
182
183 void TestGLCanvas::OnMouse( wxMouseEvent& event )
184 {
185 wxSize sz(GetClientSize());
186 if (event.Dragging())
187 {
188 /* drag in progress, simulate trackball */
189 float spin_quat[4];
190 trackball(spin_quat,
191 (2.0*info.beginx - sz.x) / sz.x,
192 ( sz.y - 2.0*info.beginy) / sz.y,
193 ( 2.0*event.GetX() - sz.x) / sz.x,
194 ( sz.y - 2.0*event.GetY()) / sz.y);
195
196 add_quats( spin_quat, info.quat, info.quat );
197
198 /* orientation has changed, redraw mesh */
199 Refresh(FALSE);
200 }
201
202 info.beginx = event.GetX();
203 info.beginy = event.GetY();
204 }
205
206 void TestGLCanvas::InitGL(void)
207 {
208 GLfloat light0_pos[4] = { -50.0, 50.0, 0.0, 0.0 };
209 GLfloat light0_color[4] = { .6, .6, .6, 1.0 }; /* white light */
210 GLfloat light1_pos[4] = { 50.0, 50.0, 0.0, 0.0 };
211 GLfloat light1_color[4] = { .4, .4, 1, 1.0 }; /* cold blue light */
212
213 /* remove back faces */
214 glDisable(GL_CULL_FACE);
215 glEnable(GL_DEPTH_TEST);
216
217 /* speedups */
218 glEnable(GL_DITHER);
219 glShadeModel(GL_SMOOTH);
220 glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_FASTEST);
221 glHint(GL_POLYGON_SMOOTH_HINT, GL_FASTEST);
222
223 /* light */
224 glLightfv(GL_LIGHT0, GL_POSITION, light0_pos);
225 glLightfv(GL_LIGHT0, GL_DIFFUSE, light0_color);
226 glLightfv(GL_LIGHT1, GL_POSITION, light1_pos);
227 glLightfv(GL_LIGHT1, GL_DIFFUSE, light1_color);
228 glEnable(GL_LIGHT0);
229 glEnable(GL_LIGHT1);
230 glEnable(GL_LIGHTING);
231
232 glColorMaterial(GL_FRONT_AND_BACK,GL_AMBIENT_AND_DIFFUSE);
233 glEnable(GL_COLOR_MATERIAL);
234 }
235
236