[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

// disabled because this has apparently changed in OpenGL 1.2, so doesn't link
// correctly if this is on...
#ifdef GL_EXT_vertex_array
#undef GL_EXT_vertex_array
#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 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, wxDefaultPosition, wxDefaultSize,
                                     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)
{
    // this is also necessary to update the context on some platforms
    wxGLCanvas::OnSize(event);
    
    // 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::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	47
9d705dfa GD	48	// disabled because this has apparently changed in OpenGL 1.2, so doesn't link
	49	// correctly if this is on...
	50	#ifdef GL_EXT_vertex_array
	51	#undef GL_EXT_vertex_array
	52	#endif
	53
8b089c5e JS	54	#include "isosurf.h"
	55
	56	// The following part is taken largely unchanged from the original C Version
	57
	58	#include <math.h>
	59
	60	GLboolean speed_test = GL_FALSE;
	61	GLboolean use_vertex_arrays = GL_FALSE;
	62
	63	GLboolean doubleBuffer = GL_TRUE;
	64
	65	GLboolean smooth = GL_TRUE;
	66	GLboolean lighting = GL_TRUE;
	67
	68
	69	#define MAXVERTS 10000
	70
	71	static GLfloat verts[MAXVERTS][3];
	72	static GLfloat norms[MAXVERTS][3];
	73	static GLint numverts;
	74
	75	static GLfloat xrot;
	76	static GLfloat yrot;
	77
	78
	79	static void read_surface( char *filename )
	80	{
	81	FILE *f;
	82
	83	f = fopen(filename,"r");
	84	if (!f) {
	85	wxString msg("Couldn't read ");
	86	msg += filename;
	87	wxMessageBox(msg);
	88	return;
	89	}
	90
	91	numverts = 0;
	92	while (!feof(f) && numverts<MAXVERTS) {
	93	fscanf( f, "%f %f %f %f %f %f",
	94	&verts[numverts][0], &verts[numverts][1], &verts[numverts][2],
	95	&norms[numverts][0], &norms[numverts][1], &norms[numverts][2] );
	96	numverts++;
	97	}
	98	numverts--;
	99
	100	printf("%d vertices, %d triangles\n", numverts, numverts-2);
	101	fclose(f);
	102	}
	103
	104
	105	static void draw_surface( void )
	106	{
	107	GLint i;
	108
	109	#ifdef GL_EXT_vertex_array
	110	if (use_vertex_arrays) {
	111	glDrawArraysEXT( GL_TRIANGLE_STRIP, 0, numverts );
	112	}
	113	else {
	114	#endif
	115	glBegin( GL_TRIANGLE_STRIP );
	116	for (i=0;i<numverts;i++) {
	117	glNormal3fv( norms[i] );
118	glVertex3fv( verts[i] );
119	}
120	glEnd();
121	#ifdef GL_EXT_vertex_array
122	}
123	#endif
124	}
125
126
127	static void draw1(void)
128	{
129	glClear( GL_COLOR_BUFFER_BIT \| GL_DEPTH_BUFFER_BIT );
130	glPushMatrix();
131	glRotatef( yrot, 0.0, 1.0, 0.0 );
132	glRotatef( xrot, 1.0, 0.0, 0.0 );
133
134	draw_surface();
135
136	glPopMatrix();
137
138	glFlush();
139	}
140
141
142	static void InitMaterials(void)
143	{
144	static float ambient[] = {0.1, 0.1, 0.1, 1.0};
145	static float diffuse[] = {0.5, 1.0, 1.0, 1.0};
146	static float position0[] = {0.0, 0.0, 20.0, 0.0};
147	static float position1[] = {0.0, 0.0, -20.0, 0.0};
148	static float front_mat_shininess[] = {60.0};
149	static float front_mat_specular[] = {0.2, 0.2, 0.2, 1.0};
150	static float front_mat_diffuse[] = {0.5, 0.28, 0.38, 1.0};
151	/*
152	static float back_mat_shininess[] = {60.0};
153	static float back_mat_specular[] = {0.5, 0.5, 0.2, 1.0};
154	static float back_mat_diffuse[] = {1.0, 1.0, 0.2, 1.0};
155	*/
156	static float lmodel_ambient[] = {1.0, 1.0, 1.0, 1.0};
157	static float lmodel_twoside[] = {GL_FALSE};
158
159	glLightfv(GL_LIGHT0, GL_AMBIENT, ambient);
160	glLightfv(GL_LIGHT0, GL_DIFFUSE, diffuse);
161	glLightfv(GL_LIGHT0, GL_POSITION, position0);
162	glEnable(GL_LIGHT0);
163
164	glLightfv(GL_LIGHT1, GL_AMBIENT, ambient);
165	glLightfv(GL_LIGHT1, GL_DIFFUSE, diffuse);
166	glLightfv(GL_LIGHT1, GL_POSITION, position1);
167	glEnable(GL_LIGHT1);
168
169	glLightModelfv(GL_LIGHT_MODEL_AMBIENT, lmodel_ambient);
170	glLightModelfv(GL_LIGHT_MODEL_TWO_SIDE, lmodel_twoside);
171	glEnable(GL_LIGHTING);
172
173	glMaterialfv(GL_FRONT_AND_BACK, GL_SHININESS, front_mat_shininess);
174	glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, front_mat_specular);
175	glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, front_mat_diffuse);
176	}
177
178
179	static void Init(void)
180	{
181	glClearColor(0.0, 0.0, 0.0, 0.0);
182
183	glShadeModel(GL_SMOOTH);
184	glEnable(GL_DEPTH_TEST);
185
186	InitMaterials();
187
188	glMatrixMode(GL_PROJECTION);
189	glLoadIdentity();
190	glFrustum( -1.0, 1.0, -1.0, 1.0, 5, 25 );
191
192	glMatrixMode(GL_MODELVIEW);
193	glLoadIdentity();
194	glTranslatef( 0.0, 0.0, -6.0 );
195
196	#ifdef GL_EXT_vertex_array
197	if (use_vertex_arrays) {
198	glVertexPointerEXT( 3, GL_FLOAT, 0, numverts, verts );
199	glNormalPointerEXT( GL_FLOAT, 0, numverts, norms );
200	glEnable( GL_VERTEX_ARRAY_EXT );
201	glEnable( GL_NORMAL_ARRAY_EXT );
202	}
203	#endif
204	}
205
8b089c5e JS	206	static GLenum Args(int argc, char **argv)
	207	{
	208	GLint i;
	209
	210	for (i = 1; i < argc; i++) {
	211	if (strcmp(argv[i], "-sb") == 0) {
	212	doubleBuffer = GL_FALSE;
	213	}
	214	else if (strcmp(argv[i], "-db") == 0) {
	215	doubleBuffer = GL_TRUE;
	216	}
	217	else if (strcmp(argv[i], "-speed") == 0) {
	218	speed_test = GL_TRUE;
	219	doubleBuffer = GL_TRUE;
	220	}
	221	else if (strcmp(argv[i], "-va") == 0) {
	222	use_vertex_arrays = GL_TRUE;
	223	}
	224	else {
	225	wxString msg("Bad option: ");
	226	msg += argv[i];
	227	wxMessageBox(msg);
	228	return GL_FALSE;
	229	}
	230	}
	231
	232	return GL_TRUE;
	233	}
	234
	235	// The following part was written for wxWindows 1.66
	236	MyFrame *frame = NULL;
	237
	238	IMPLEMENT_APP(MyApp)
	239
	240	// `Main program' equivalent, creating windows and returning main app frame
	241	bool MyApp::OnInit(void)
	242	{
	243	Args(argc, argv);
	244
	245	// Create the main frame window
	246	frame = new MyFrame(NULL, "Isosurf GL Sample", wxPoint(50, 50), wxSize(200, 200));
	247
	248	// Give it an icon
	249	frame->SetIcon(wxIcon("mondrian"));
	250
	251	// Make a menubar
	252	wxMenu *fileMenu = new wxMenu;
	253
	254	fileMenu->Append(wxID_EXIT, "E&xit");
	255	wxMenuBar *menuBar = new wxMenuBar;
	256	menuBar->Append(fileMenu, "&File");
	257	frame->SetMenuBar(menuBar);
	258
	259	// Make a TestGLCanvas
	260
	261	// JACS
	262	#ifdef __WXMSW__
	263	int *gl_attrib = NULL;
	264	#else
919ae91a UN	265	int gl_attrib[20] = { WX_GL_RGBA, WX_GL_MIN_RED, 1, WX_GL_MIN_GREEN, 1,
919ae91a UN	266	WX_GL_MIN_BLUE, 1, WX_GL_DEPTH_SIZE, 1,
cb712074 GD	267	WX_GL_DOUBLEBUFFER,
	268	# ifdef __WXMAC__
	269	GL_NONE };
	270	# else
	271	None };
	272	# endif
8b089c5e JS	273	#endif
	274
	275	if(!doubleBuffer)
	276	{
	277	printf("don't have double buffer, disabling\n");
	278	#ifdef __WXGTK__
	279	gl_attrib[9] = None;
	280	#endif
	281	doubleBuffer = GL_FALSE;
	282	}
919ae91a	283
9d705dfa	284	frame->m_canvas = new TestGLCanvas(frame, -1, wxDefaultPosition, wxDefaultSize,
919ae91a	285	0, "TestGLCanvas", gl_attrib );
8b089c5e JS	286
	287	// Show the frame
	288	frame->Show(TRUE);
	289
	290	frame->m_canvas->SetCurrent();
	291	read_surface( "isosurf.dat" );
	292
	293	Init();
	294
	295	return TRUE;
	296	}
	297
	298	BEGIN_EVENT_TABLE(MyFrame, wxFrame)
	299	EVT_MENU(wxID_EXIT, MyFrame::OnExit)
	300	END_EVENT_TABLE()
	301
	302	// My frame constructor
	303	MyFrame::MyFrame(wxFrame *frame, const wxString& title, const wxPoint& pos,
	304	const wxSize& size, long style):
	305	wxFrame(frame, -1, title, pos, size, style)
	306	{
	307	m_canvas = NULL;
	308	}
	309
	310	// Intercept menu commands
	311	void MyFrame::OnExit(wxCommandEvent& event)
	312	{
	313	Destroy();
	314	}
	315
	316	/*
	317	* TestGLCanvas implementation
	318	*/
	319
	320	BEGIN_EVENT_TABLE(TestGLCanvas, wxGLCanvas)
	321	EVT_SIZE(TestGLCanvas::OnSize)
	322	EVT_PAINT(TestGLCanvas::OnPaint)
	323	EVT_CHAR(TestGLCanvas::OnChar)
	324	EVT_MOUSE_EVENTS(TestGLCanvas::OnMouseEvent)
	325	EVT_ERASE_BACKGROUND(TestGLCanvas::OnEraseBackground)
	326	END_EVENT_TABLE()
	327
	328	TestGLCanvas::TestGLCanvas(wxWindow *parent, wxWindowID id,
	329	const wxPoint& pos, const wxSize& size, long style, const wxString& name, int* gl_attrib):
	330	wxGLCanvas(parent, id, pos, size, style, name, gl_attrib)
	331	{
	332	parent->Show(TRUE);
	333	SetCurrent();
919ae91a	334
8b089c5e JS	335	/* Make sure server supports the vertex array extension */
	336	char* extensions = (char *) glGetString( GL_EXTENSIONS );
	337	if (!extensions \|\| !strstr( extensions, "GL_EXT_vertex_array" )) {
	338	use_vertex_arrays = GL_FALSE;
	339	}
	340	}
	341
	342
	343	TestGLCanvas::~TestGLCanvas(void)
	344	{
	345	}
	346
	347	void TestGLCanvas::OnPaint( wxPaintEvent& event )
	348	{
	349	// This is a dummy, to avoid an endless succession of paint messages.
	350	// OnPaint handlers must always create a wxPaintDC.
	351	wxPaintDC dc(this);
	352
c661ecca RR	353	#ifndef __WXMOTIF__
	354	if (!GetContext()) return;
	355	#endif
	356
919ae91a UN	357	SetCurrent();
919ae91a UN	358
8b089c5e JS	359	draw1();
	360	SwapBuffers();
	361	}
	362
	363	void TestGLCanvas::OnSize(wxSizeEvent& event)
	364	{
9d705dfa GD	365	// this is also necessary to update the context on some platforms
	366	wxGLCanvas::OnSize(event);
	367
	368	// set GL viewport (not called by wxGLCanvas::OnSize on all platforms...)
	369	int w, h;
	370	GetClientSize(&w, &h);
c661ecca	371	#ifndef __WXMOTIF__
9d705dfa	372	if (GetContext())
c661ecca	373	#endif
9d705dfa	374	{
8b089c5e	375	SetCurrent();
9d705dfa GD	376	glViewport(0, 0, (GLint) w, (GLint) h);
9d705dfa GD	377	}
8b089c5e JS	378	}
	379
	380	void TestGLCanvas::OnChar(wxKeyEvent& event)
	381	{
	382	switch(event.KeyCode()) {
	383	case WXK_ESCAPE:
	384	exit(0);
	385	case WXK_LEFT:
	386	yrot -= 15.0;
	387	break;
	388	case WXK_RIGHT:
	389	yrot += 15.0;
	390	break;
	391	case WXK_UP:
	392	xrot += 15.0;
	393	break;
	394	case WXK_DOWN:
	395	xrot -= 15.0;
	396	break;
	397	case 's': case 'S':
	398	smooth = !smooth;
	399	if (smooth) {
	400	glShadeModel(GL_SMOOTH);
	401	} else {
	402	glShadeModel(GL_FLAT);
	403	}
	404	break;
	405	case 'l': case 'L':
	406	lighting = !lighting;
	407	if (lighting) {
	408	glEnable(GL_LIGHTING);
	409	} else {
	410	glDisable(GL_LIGHTING);
	411	}
	412	break;
	413	default:
	414	{
	415	event.Skip();
	416	return;
	417	}
	418	}
	419
	420	Refresh(FALSE);
	421	}
	422
	423	void TestGLCanvas::OnMouseEvent(wxMouseEvent& event)
	424	{
	425	static int dragging = 0;
	426	static float last_x, last_y;
	427
	428	//printf("%f %f %d\n", event.GetX(), event.GetY(), (int)event.LeftIsDown());
	429	if(event.LeftIsDown()) {
	430	if(!dragging) {
	431	dragging = 1;
	432	} else {
	433	yrot += (event.GetX() - last_x)*1.0;
	434	xrot += (event.GetY() - last_y)*1.0;
	435	Refresh(FALSE);
	436	}
	437	last_x = event.GetX();
	438	last_y = event.GetY();
	439	} else
	440	dragging = 0;
	441	}
442
443	void TestGLCanvas::OnEraseBackground(wxEraseEvent& event)
444	{
445	// Do nothing, to avoid flashing.
446	}
447