--- /dev/null
+/////////////////////////////////////////////////////////////////////////////
+// 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
+
+#include "wx/timer.h"
+#include "glcanvas.h"
+
+#include <GL/gl.h>
+#include <GL/glu.h>
+
+#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] = { GLX_RGBA, GLX_RED_SIZE, 1, GLX_GREEN_SIZE, 1,
+ GLX_BLUE_SIZE, 1, GLX_DEPTH_SIZE, 1,
+ GLX_DOUBLEBUFFER, None };
+#endif
+
+ if(!doubleBuffer
+#ifdef __X__ // JACS
+ || !wxGLCanvas::HaveVisual(gl_attrib)
+#endif
+ )
+ {
+ printf("don't have double buffer, disabling\n");
+#ifndef __WXMSW__
+ 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();
+}
+
+bool MyFrame::OnClose(void)
+{
+ return TRUE;
+}
+
+
+/*
+ * 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);
+
+ draw1();
+ SwapBuffers();
+}
+
+void TestGLCanvas::OnSize(wxSizeEvent& event)
+{
+ 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;
+ }
+
+ Refresh();
+}
+
+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();
+ }
+ last_x = event.GetX();
+ last_y = event.GetY();
+ } else
+ dragging = 0;
+}
+
+void TestGLCanvas::OnEraseBackground(wxEraseEvent& event)
+{
+ // Do nothing, to avoid flashing.
+}
+
projects / wxWidgets.git / commitdiff
