[wxWidgets.git] / samples / opengl / isosurf / isosurf.cpp

/////////////////////////////////////////////////////////////////////////////
// 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:      $Id$
// 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

#if !wxUSE_GLCANVAS
#error Please set wxUSE_GLCANVAS to 1 in setup.h.
#endif

#include "wx/timer.h"
#include "wx/glcanvas.h"

#ifdef __WXMAC__
#  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"

// The following part is taken largely unchanged from the original C Version

#include <math.h>

GLboolean speed_test = GL_FALSE;
GLboolean use_vertex_arrays = GL_FALSE;

GLboolean doubleBuffer = GL_TRUE;

GLboolean smooth = GL_TRUE;
GLboolean lighting = GL_TRUE;


#define MAXVERTS 10000

static GLfloat verts[MAXVERTS][3];
static GLfloat norms[MAXVERTS][3];
static GLint numverts;

static GLfloat xrot;
static GLfloat yrot;


static void read_surface( char *filename )
{
   FILE *f;

   f = fopen(filename,"r");
   if (!f) {
      wxString msg("Couldn't read ");
      msg += filename;
      wxMessageBox(msg);
      return;
   }

   numverts = 0;
   while (!feof(f) && numverts<MAXVERTS) {
      fscanf( f, "%f %f %f  %f %f %f",
	      &verts[numverts][0], &verts[numverts][1], &verts[numverts][2],
	      &norms[numverts][0], &norms[numverts][1], &norms[numverts][2] );
      numverts++;
   }
   numverts--;

   printf("%d vertices, %d triangles\n", numverts, numverts-2);
   fclose(f);
}


static void draw_surface( void )
{
   GLint i;

#ifdef GL_EXT_vertex_array
   if (use_vertex_arrays) {
      glDrawArraysEXT( GL_TRIANGLE_STRIP, 0, numverts );
   }
   else {
#endif
      glBegin( GL_TRIANGLE_STRIP );
      for (i=0;i<numverts;i++) {
         glNormal3fv( norms[i] );
         glVertex3fv( verts[i] );
      }
      glEnd();
#ifdef GL_EXT_vertex_array
   }
#endif
}


static void draw1(void)
{
    glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
    glPushMatrix();
    glRotatef( yrot, 0.0, 1.0, 0.0 );
    glRotatef( xrot, 1.0, 0.0, 0.0 );

    draw_surface();

    glPopMatrix();

    glFlush();
}


static void InitMaterials(void)
{
    static float ambient[] = {0.1, 0.1, 0.1, 1.0};
    static float diffuse[] = {0.5, 1.0, 1.0, 1.0};
    static float position0[] = {0.0, 0.0, 20.0, 0.0};
    static float position1[] = {0.0, 0.0, -20.0, 0.0};
    static float front_mat_shininess[] = {60.0};
    static float front_mat_specular[] = {0.2, 0.2, 0.2, 1.0};
    static float front_mat_diffuse[] = {0.5, 0.28, 0.38, 1.0};
    /*
    static float back_mat_shininess[] = {60.0};
    static float back_mat_specular[] = {0.5, 0.5, 0.2, 1.0};
    static float back_mat_diffuse[] = {1.0, 1.0, 0.2, 1.0};
    */
    static float lmodel_ambient[] = {1.0, 1.0, 1.0, 1.0};
    static float lmodel_twoside[] = {GL_FALSE};

    glLightfv(GL_LIGHT0, GL_AMBIENT, ambient);
    glLightfv(GL_LIGHT0, GL_DIFFUSE, diffuse);
    glLightfv(GL_LIGHT0, GL_POSITION, position0);
    glEnable(GL_LIGHT0);
    
    glLightfv(GL_LIGHT1, GL_AMBIENT, ambient);
    glLightfv(GL_LIGHT1, GL_DIFFUSE, diffuse);
    glLightfv(GL_LIGHT1, GL_POSITION, position1);
    glEnable(GL_LIGHT1);
    
    glLightModelfv(GL_LIGHT_MODEL_AMBIENT, lmodel_ambient);
    glLightModelfv(GL_LIGHT_MODEL_TWO_SIDE, lmodel_twoside);
    glEnable(GL_LIGHTING);

    glMaterialfv(GL_FRONT_AND_BACK, GL_SHININESS, front_mat_shininess);
    glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, front_mat_specular);
    glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, front_mat_diffuse);
}


static void Init(void)
{
   glClearColor(0.0, 0.0, 0.0, 0.0);

   glShadeModel(GL_SMOOTH);
   glEnable(GL_DEPTH_TEST);

   InitMaterials();

   glMatrixMode(GL_PROJECTION);
   glLoadIdentity();
   glFrustum( -1.0, 1.0, -1.0, 1.0, 5, 25 );

   glMatrixMode(GL_MODELVIEW);
   glLoadIdentity();
   glTranslatef( 0.0, 0.0, -6.0 );

#ifdef GL_EXT_vertex_array
   if (use_vertex_arrays) {
      glVertexPointerEXT( 3, GL_FLOAT, 0, numverts, verts );
      glNormalPointerEXT( GL_FLOAT, 0, numverts, norms );
      glEnable( GL_VERTEX_ARRAY_EXT );
      glEnable( GL_NORMAL_ARRAY_EXT );
   }
#endif
}


static void Reshape(int width, int height)
{
  glViewport(0, 0, (GLint)width, (GLint)height);
}


static GLenum Args(int argc, char **argv)
{
   GLint i;

   for (i = 1; i < argc; i++) {
      if (strcmp(argv[i], "-sb") == 0) {
         doubleBuffer = GL_FALSE;
      }
      else if (strcmp(argv[i], "-db") == 0) {
         doubleBuffer = GL_TRUE;
      }
      else if (strcmp(argv[i], "-speed") == 0) {
         speed_test = GL_TRUE;
         doubleBuffer = GL_TRUE;
      }
      else if (strcmp(argv[i], "-va") == 0) {
         use_vertex_arrays = GL_TRUE;
      }
      else {
         wxString msg("Bad option: ");
         msg += argv[i];
         wxMessageBox(msg);
         return GL_FALSE;
      }
   }

   return GL_TRUE;
}

// The following part was written for wxWindows 1.66
MyFrame *frame = NULL;

IMPLEMENT_APP(MyApp)

// `Main program' equivalent, creating windows and returning main app frame
bool MyApp::OnInit(void)
{
  Args(argc, argv);

  // Create the main frame window
  frame = new MyFrame(NULL, "Isosurf GL Sample", wxPoint(50, 50), wxSize(200, 200));

  // Give it an icon
  frame->SetIcon(wxIcon("mondrian"));

  // Make a menubar
  wxMenu *fileMenu = new wxMenu;

  fileMenu->Append(wxID_EXIT, "E&xit");
  wxMenuBar *menuBar = new wxMenuBar;
  menuBar->Append(fileMenu, "&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,
#  ifdef __WXMAC__
			GL_NONE };
#  else
			None };
#  endif
#endif

  if(!doubleBuffer)
   {
      printf("don't have double buffer, disabling\n");
#ifdef __WXGTK__
      gl_attrib[9] = None;
#endif
      doubleBuffer = GL_FALSE;
  }
 
  frame->m_canvas = new TestGLCanvas(frame, -1, wxPoint(0, 0), wxSize(200, 200),
                                     0, "TestGLCanvas", gl_attrib );

  // Show the frame
  frame->Show(TRUE);

  frame->m_canvas->SetCurrent();
  read_surface( "isosurf.dat" );

  Init();

  return TRUE;
}

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();
}

/*
 * TestGLCanvas implementation
 */

BEGIN_EVENT_TABLE(TestGLCanvas, wxGLCanvas)
    EVT_SIZE(TestGLCanvas::OnSize)
    EVT_PAINT(TestGLCanvas::OnPaint)
    EVT_CHAR(TestGLCanvas::OnChar)
    EVT_MOUSE_EVENTS(TestGLCanvas::OnMouseEvent)
    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, pos, size, style, name, gl_attrib)
{
   parent->Show(TRUE);
   SetCurrent();

   /* Make sure server supports the vertex array extension */
   char* extensions = (char *) glGetString( GL_EXTENSIONS );
   if (!extensions || !strstr( extensions, "GL_EXT_vertex_array" )) {
      use_vertex_arrays = GL_FALSE;
   }
}


TestGLCanvas::~TestGLCanvas(void)
{
}

void TestGLCanvas::OnPaint( wxPaintEvent& event )
{
    // This is a dummy, to avoid an endless succession of paint messages.
    // OnPaint handlers must always create a wxPaintDC.
    wxPaintDC dc(this);

#ifndef __WXMOTIF__
    if (!GetContext()) return;
#endif

    SetCurrent();

    draw1();
    SwapBuffers();
}

void TestGLCanvas::OnSize(wxSizeEvent& event)
{
#ifndef __WXMOTIF__
    if (!GetContext()) return;
#endif

    SetCurrent();
    int width, height;
    GetClientSize(& width, & height);
    Reshape(width, height);
}

void TestGLCanvas::OnChar(wxKeyEvent& event)
{
    switch(event.KeyCode()) {
    case WXK_ESCAPE:
	exit(0);
    case WXK_LEFT:
	yrot -= 15.0;
	break;
    case WXK_RIGHT:
	yrot += 15.0;
	break;
    case WXK_UP:
	xrot += 15.0;
	break;
    case WXK_DOWN:
	xrot -= 15.0;
	break;
    case 's': case 'S':
	smooth = !smooth;
	if (smooth) {
	    glShadeModel(GL_SMOOTH);
	} else {
	    glShadeModel(GL_FLAT);
	}
	break;
    case 'l': case 'L':
	lighting = !lighting;
	if (lighting) {
	    glEnable(GL_LIGHTING);
	} else {
	    glDisable(GL_LIGHTING);
	}
	break;
     default:
      {
        event.Skip();
	return;
      }
    }

    Refresh(FALSE);
}

void TestGLCanvas::OnMouseEvent(wxMouseEvent& event)
{
    static int dragging = 0;
    static float last_x, last_y;

    //printf("%f %f %d\n", event.GetX(), event.GetY(), (int)event.LeftIsDown());
    if(event.LeftIsDown()) {
	if(!dragging) {
	    dragging = 1;
	} else {
	    yrot += (event.GetX() - last_x)*1.0;
	    xrot += (event.GetY() - last_y)*1.0;
	    Refresh(FALSE);
	}
	last_x = event.GetX();
	last_y = event.GetY();
    } else
	dragging = 0;
}

void TestGLCanvas::OnEraseBackground(wxEraseEvent& event)
{
    // Do nothing, to avoid flashing.
}
Commit	Line	Data
8b089c5e JS	1	/////////////////////////////////////////////////////////////////////////////
	2	// Name: isosurf.cpp
	3	// Purpose: wxGLCanvas demo program
	4	// Author: Brian Paul (original gltk version), Wolfram Gloger
	5	// Modified by: Julian Smart
	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
5fa399c9 JS	28	#if !wxUSE_GLCANVAS
	29	#error Please set wxUSE_GLCANVAS to 1 in setup.h.
	30	#endif
	31
8b089c5e JS	32	#include "wx/timer.h"
	33	#include "wx/glcanvas.h"
	34
cb712074 GD	35	#ifdef __WXMAC__
	36	# ifdef __DARWIN__
	37	# include <OpenGL/gl.h>
	38	# include <OpenGL/glu.h>
	39	# else
	40	# include <gl.h>
	41	# include <glu.h>
	42	# endif
	43	#else
	44	# include <GL/gl.h>
	45	# include <GL/glu.h>
	46	#endif
8b089c5e JS	47
	48	#include "isosurf.h"
	49
	50	// The following part is taken largely unchanged from the original C Version
	51
	52	#include <math.h>
	53
	54	GLboolean speed_test = GL_FALSE;
	55	GLboolean use_vertex_arrays = GL_FALSE;
	56
	57	GLboolean doubleBuffer = GL_TRUE;
	58
	59	GLboolean smooth = GL_TRUE;
	60	GLboolean lighting = GL_TRUE;
	61
	62
	63	#define MAXVERTS 10000
	64
	65	static GLfloat verts[MAXVERTS][3];
	66	static GLfloat norms[MAXVERTS][3];
	67	static GLint numverts;
	68
	69	static GLfloat xrot;
	70	static GLfloat yrot;
	71
	72
	73	static void read_surface( char *filename )
	74	{
	75	FILE *f;
	76
	77	f = fopen(filename,"r");
	78	if (!f) {
	79	wxString msg("Couldn't read ");
	80	msg += filename;
	81	wxMessageBox(msg);
	82	return;
	83	}
	84
	85	numverts = 0;
	86	while (!feof(f) && numverts<MAXVERTS) {
	87	fscanf( f, "%f %f %f %f %f %f",
	88	&verts[numverts][0], &verts[numverts][1], &verts[numverts][2],
	89	&norms[numverts][0], &norms[numverts][1], &norms[numverts][2] );
	90	numverts++;
	91	}
	92	numverts--;
	93
	94	printf("%d vertices, %d triangles\n", numverts, numverts-2);
	95	fclose(f);
	96	}
	97
	98
	99	static void draw_surface( void )
	100	{
	101	GLint i;
	102
	103	#ifdef GL_EXT_vertex_array
	104	if (use_vertex_arrays) {
	105	glDrawArraysEXT( GL_TRIANGLE_STRIP, 0, numverts );
	106	}
	107	else {
	108	#endif
	109	glBegin( GL_TRIANGLE_STRIP );
	110	for (i=0;i<numverts;i++) {
111	glNormal3fv( norms[i] );
112	glVertex3fv( verts[i] );
113	}
114	glEnd();
115	#ifdef GL_EXT_vertex_array
116	}
117	#endif
118	}
119
120
121	static void draw1(void)
122	{
123	glClear( GL_COLOR_BUFFER_BIT \| GL_DEPTH_BUFFER_BIT );
124	glPushMatrix();
125	glRotatef( yrot, 0.0, 1.0, 0.0 );
126	glRotatef( xrot, 1.0, 0.0, 0.0 );
127
128	draw_surface();
129
130	glPopMatrix();
131
132	glFlush();
133	}
134
135
136	static void InitMaterials(void)
137	{
138	static float ambient[] = {0.1, 0.1, 0.1, 1.0};
139	static float diffuse[] = {0.5, 1.0, 1.0, 1.0};
140	static float position0[] = {0.0, 0.0, 20.0, 0.0};
141	static float position1[] = {0.0, 0.0, -20.0, 0.0};
142	static float front_mat_shininess[] = {60.0};
143	static float front_mat_specular[] = {0.2, 0.2, 0.2, 1.0};
144	static float front_mat_diffuse[] = {0.5, 0.28, 0.38, 1.0};
145	/*
146	static float back_mat_shininess[] = {60.0};
147	static float back_mat_specular[] = {0.5, 0.5, 0.2, 1.0};
148	static float back_mat_diffuse[] = {1.0, 1.0, 0.2, 1.0};
149	*/
150	static float lmodel_ambient[] = {1.0, 1.0, 1.0, 1.0};
151	static float lmodel_twoside[] = {GL_FALSE};
152
153	glLightfv(GL_LIGHT0, GL_AMBIENT, ambient);
154	glLightfv(GL_LIGHT0, GL_DIFFUSE, diffuse);
155	glLightfv(GL_LIGHT0, GL_POSITION, position0);
156	glEnable(GL_LIGHT0);
157
158	glLightfv(GL_LIGHT1, GL_AMBIENT, ambient);
159	glLightfv(GL_LIGHT1, GL_DIFFUSE, diffuse);
160	glLightfv(GL_LIGHT1, GL_POSITION, position1);
161	glEnable(GL_LIGHT1);
162
163	glLightModelfv(GL_LIGHT_MODEL_AMBIENT, lmodel_ambient);
164	glLightModelfv(GL_LIGHT_MODEL_TWO_SIDE, lmodel_twoside);
165	glEnable(GL_LIGHTING);
166
167	glMaterialfv(GL_FRONT_AND_BACK, GL_SHININESS, front_mat_shininess);
168	glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, front_mat_specular);
169	glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, front_mat_diffuse);
170	}
171
172
173	static void Init(void)
174	{
175	glClearColor(0.0, 0.0, 0.0, 0.0);
176
177	glShadeModel(GL_SMOOTH);
178	glEnable(GL_DEPTH_TEST);
179
180	InitMaterials();
181
182	glMatrixMode(GL_PROJECTION);
183	glLoadIdentity();
184	glFrustum( -1.0, 1.0, -1.0, 1.0, 5, 25 );
185
186	glMatrixMode(GL_MODELVIEW);
187	glLoadIdentity();
188	glTranslatef( 0.0, 0.0, -6.0 );
189
190	#ifdef GL_EXT_vertex_array
191	if (use_vertex_arrays) {
192	glVertexPointerEXT( 3, GL_FLOAT, 0, numverts, verts );
193	glNormalPointerEXT( GL_FLOAT, 0, numverts, norms );
194	glEnable( GL_VERTEX_ARRAY_EXT );
195	glEnable( GL_NORMAL_ARRAY_EXT );
196	}
197	#endif
198	}
199
200
201	static void Reshape(int width, int height)
202	{
203	glViewport(0, 0, (GLint)width, (GLint)height);
204	}
205
206
207	static GLenum Args(int argc, char **argv)
208	{
209	GLint i;
210
211	for (i = 1; i < argc; i++) {
212	if (strcmp(argv[i], "-sb") == 0) {
213	doubleBuffer = GL_FALSE;
214	}
215	else if (strcmp(argv[i], "-db") == 0) {
216	doubleBuffer = GL_TRUE;
217	}
218	else if (strcmp(argv[i], "-speed") == 0) {
219	speed_test = GL_TRUE;
220	doubleBuffer = GL_TRUE;
221	}
222	else if (strcmp(argv[i], "-va") == 0) {
223	use_vertex_arrays = GL_TRUE;
224	}
225	else {
226	wxString msg("Bad option: ");
227	msg += argv[i];
228	wxMessageBox(msg);
229	return GL_FALSE;
230	}
231	}
232
233	return GL_TRUE;
234	}
235
236	// The following part was written for wxWindows 1.66
237	MyFrame *frame = NULL;
238
239	IMPLEMENT_APP(MyApp)
240
241	// `Main program' equivalent, creating windows and returning main app frame
242	bool MyApp::OnInit(void)
243	{
244	Args(argc, argv);
245
246	// Create the main frame window
247	frame = new MyFrame(NULL, "Isosurf GL Sample", wxPoint(50, 50), wxSize(200, 200));
248
249	// Give it an icon
250	frame->SetIcon(wxIcon("mondrian"));
251
252	// Make a menubar
253	wxMenu *fileMenu = new wxMenu;
254
255	fileMenu->Append(wxID_EXIT, "E&xit");
256	wxMenuBar *menuBar = new wxMenuBar;
257	menuBar->Append(fileMenu, "&File");
258	frame->SetMenuBar(menuBar);
259
260	// Make a TestGLCanvas
261
262	// JACS
263	#ifdef __WXMSW__
264	int *gl_attrib = NULL;
265	#else
919ae91a UN	266	int gl_attrib[20] = { WX_GL_RGBA, WX_GL_MIN_RED, 1, WX_GL_MIN_GREEN, 1,
919ae91a UN	267	WX_GL_MIN_BLUE, 1, WX_GL_DEPTH_SIZE, 1,
cb712074 GD	268	WX_GL_DOUBLEBUFFER,
	269	# ifdef __WXMAC__
	270	GL_NONE };
	271	# else
	272	None };
	273	# endif
8b089c5e JS	274	#endif
	275
	276	if(!doubleBuffer)
	277	{
	278	printf("don't have double buffer, disabling\n");
	279	#ifdef __WXGTK__
	280	gl_attrib[9] = None;
	281	#endif
	282	doubleBuffer = GL_FALSE;
	283	}
919ae91a UN	284
	285	frame->m_canvas = new TestGLCanvas(frame, -1, wxPoint(0, 0), wxSize(200, 200),
	286	0, "TestGLCanvas", gl_attrib );
8b089c5e JS	287
	288	// Show the frame
	289	frame->Show(TRUE);
	290
	291	frame->m_canvas->SetCurrent();
	292	read_surface( "isosurf.dat" );
	293
	294	Init();
	295
	296	return TRUE;
	297	}
	298
	299	BEGIN_EVENT_TABLE(MyFrame, wxFrame)
	300	EVT_MENU(wxID_EXIT, MyFrame::OnExit)
	301	END_EVENT_TABLE()
	302
	303	// My frame constructor
	304	MyFrame::MyFrame(wxFrame *frame, const wxString& title, const wxPoint& pos,
	305	const wxSize& size, long style):
	306	wxFrame(frame, -1, title, pos, size, style)
	307	{
	308	m_canvas = NULL;
	309	}
	310
	311	// Intercept menu commands
	312	void MyFrame::OnExit(wxCommandEvent& event)
	313	{
	314	Destroy();
	315	}
	316
	317	/*
	318	* TestGLCanvas implementation
	319	*/
	320
	321	BEGIN_EVENT_TABLE(TestGLCanvas, wxGLCanvas)
	322	EVT_SIZE(TestGLCanvas::OnSize)
	323	EVT_PAINT(TestGLCanvas::OnPaint)
	324	EVT_CHAR(TestGLCanvas::OnChar)
	325	EVT_MOUSE_EVENTS(TestGLCanvas::OnMouseEvent)
	326	EVT_ERASE_BACKGROUND(TestGLCanvas::OnEraseBackground)
	327	END_EVENT_TABLE()
	328
	329	TestGLCanvas::TestGLCanvas(wxWindow *parent, wxWindowID id,
	330	const wxPoint& pos, const wxSize& size, long style, const wxString& name, int* gl_attrib):
	331	wxGLCanvas(parent, id, pos, size, style, name, gl_attrib)
	332	{
	333	parent->Show(TRUE);
	334	SetCurrent();
919ae91a	335
8b089c5e JS	336	/* Make sure server supports the vertex array extension */
	337	char* extensions = (char *) glGetString( GL_EXTENSIONS );
	338	if (!extensions \|\| !strstr( extensions, "GL_EXT_vertex_array" )) {
	339	use_vertex_arrays = GL_FALSE;
	340	}
	341	}
	342
	343
	344	TestGLCanvas::~TestGLCanvas(void)
	345	{
	346	}
	347
	348	void TestGLCanvas::OnPaint( wxPaintEvent& event )
	349	{
	350	// This is a dummy, to avoid an endless succession of paint messages.
	351	// OnPaint handlers must always create a wxPaintDC.
	352	wxPaintDC dc(this);
	353
c661ecca RR	354	#ifndef __WXMOTIF__
	355	if (!GetContext()) return;
	356	#endif
	357
919ae91a UN	358	SetCurrent();
919ae91a UN	359
8b089c5e JS	360	draw1();
	361	SwapBuffers();
	362	}
	363
	364	void TestGLCanvas::OnSize(wxSizeEvent& event)
	365	{
c661ecca RR	366	#ifndef __WXMOTIF__
	367	if (!GetContext()) return;
	368	#endif
	369
8b089c5e JS	370	SetCurrent();
	371	int width, height;
	372	GetClientSize(& width, & height);
	373	Reshape(width, height);
	374	}
	375
	376	void TestGLCanvas::OnChar(wxKeyEvent& event)
	377	{
	378	switch(event.KeyCode()) {
	379	case WXK_ESCAPE:
	380	exit(0);
	381	case WXK_LEFT:
	382	yrot -= 15.0;
	383	break;
	384	case WXK_RIGHT:
	385	yrot += 15.0;
	386	break;
	387	case WXK_UP:
	388	xrot += 15.0;
	389	break;
	390	case WXK_DOWN:
	391	xrot -= 15.0;
	392	break;
	393	case 's': case 'S':
	394	smooth = !smooth;
	395	if (smooth) {
	396	glShadeModel(GL_SMOOTH);
	397	} else {
	398	glShadeModel(GL_FLAT);
	399	}
	400	break;
	401	case 'l': case 'L':
	402	lighting = !lighting;
	403	if (lighting) {
	404	glEnable(GL_LIGHTING);
	405	} else {
	406	glDisable(GL_LIGHTING);
	407	}
	408	break;
	409	default:
	410	{
	411	event.Skip();
	412	return;
	413	}
	414	}
	415
	416	Refresh(FALSE);
	417	}
	418
	419	void TestGLCanvas::OnMouseEvent(wxMouseEvent& event)
	420	{
	421	static int dragging = 0;
	422	static float last_x, last_y;
	423
	424	//printf("%f %f %d\n", event.GetX(), event.GetY(), (int)event.LeftIsDown());
	425	if(event.LeftIsDown()) {
	426	if(!dragging) {
	427	dragging = 1;
	428	} else {
	429	yrot += (event.GetX() - last_x)*1.0;
	430	xrot += (event.GetY() - last_y)*1.0;
	431	Refresh(FALSE);
	432	}
	433	last_x = event.GetX();
434	last_y = event.GetY();
435	} else
436	dragging = 0;
437	}
438
439	void TestGLCanvas::OnEraseBackground(wxEraseEvent& event)
440	{
441	// Do nothing, to avoid flashing.
442	}
443