#include <iostream>
#include <cstdlib>
#include <cmath>
#include <gtkmm.h>
#include <gtkglmm.h>
#ifdef G_OS_WIN32
#define WIN32_LEAN_AND_MEAN 1
#include <windows.h>
#endif
#include <GL/gl.h>
#include <GL/glu.h>
struct GLConfigUtil
{
static void print_gl_attrib(const Glib::RefPtr<const Gdk::GL::Config>& glconfig,
const char* attrib_str,
int attrib,
bool is_boolean);
static void examine_gl_attrib(const Glib::RefPtr<const Gdk::GL::Config>& glconfig);
};
void GLConfigUtil::print_gl_attrib(const Glib::RefPtr<const Gdk::GL::Config>& glconfig,
const char* attrib_str,
int attrib,
bool is_boolean)
{
int value;
if (glconfig->get_attrib(attrib, value))
{
std::cout << attrib_str << " = ";
if (is_boolean)
std::cout << (value == true ? "true" : "false") << std::endl;
else
std::cout << value << std::endl;
}
else
{
std::cout << "*** Cannot get "
<< attrib_str
<< " attribute value\n";
}
}
void GLConfigUtil::examine_gl_attrib(const Glib::RefPtr<const Gdk::GL::Config>& glconfig)
{
std::cout << "\nOpenGL visual configurations :\n\n";
std::cout << "glconfig->is_rgba() = "
<< (glconfig->is_rgba() ? "true" : "false")
<< std::endl;
std::cout << "glconfig->is_double_buffered() = "
<< (glconfig->is_double_buffered() ? "true" : "false")
<< std::endl;
std::cout << "glconfig->is_stereo() = "
<< (glconfig->is_stereo() ? "true" : "false")
<< std::endl;
std::cout << "glconfig->has_alpha() = "
<< (glconfig->has_alpha() ? "true" : "false")
<< std::endl;
std::cout << "glconfig->has_depth_buffer() = "
<< (glconfig->has_depth_buffer() ? "true" : "false")
<< std::endl;
std::cout << "glconfig->has_stencil_buffer() = "
<< (glconfig->has_stencil_buffer() ? "true" : "false")
<< std::endl;
std::cout << "glconfig->has_accum_buffer() = "
<< (glconfig->has_accum_buffer() ? "true" : "false")
<< std::endl;
std::cout << std::endl;
print_gl_attrib(glconfig, "Gdk::GL::USE_GL", Gdk::GL::USE_GL, true);
print_gl_attrib(glconfig, "Gdk::GL::BUFFER_SIZE", Gdk::GL::BUFFER_SIZE, false);
print_gl_attrib(glconfig, "Gdk::GL::LEVEL", Gdk::GL::LEVEL, false);
print_gl_attrib(glconfig, "Gdk::GL::RGBA", Gdk::GL::RGBA, true);
print_gl_attrib(glconfig, "Gdk::GL::DOUBLEBUFFER", Gdk::GL::DOUBLEBUFFER, true);
print_gl_attrib(glconfig, "Gdk::GL::STEREO", Gdk::GL::STEREO, true);
print_gl_attrib(glconfig, "Gdk::GL::AUX_BUFFERS", Gdk::GL::AUX_BUFFERS, false);
print_gl_attrib(glconfig, "Gdk::GL::RED_SIZE", Gdk::GL::RED_SIZE, false);
print_gl_attrib(glconfig, "Gdk::GL::GREEN_SIZE", Gdk::GL::GREEN_SIZE, false);
print_gl_attrib(glconfig, "Gdk::GL::BLUE_SIZE", Gdk::GL::BLUE_SIZE, false);
print_gl_attrib(glconfig, "Gdk::GL::ALPHA_SIZE", Gdk::GL::ALPHA_SIZE, false);
print_gl_attrib(glconfig, "Gdk::GL::DEPTH_SIZE", Gdk::GL::DEPTH_SIZE, false);
print_gl_attrib(glconfig, "Gdk::GL::STENCIL_SIZE", Gdk::GL::STENCIL_SIZE, false);
print_gl_attrib(glconfig, "Gdk::GL::ACCUM_RED_SIZE", Gdk::GL::ACCUM_RED_SIZE, false);
print_gl_attrib(glconfig, "Gdk::GL::ACCUM_GREEN_SIZE", Gdk::GL::ACCUM_GREEN_SIZE, false);
print_gl_attrib(glconfig, "Gdk::GL::ACCUM_BLUE_SIZE", Gdk::GL::ACCUM_BLUE_SIZE, false);
print_gl_attrib(glconfig, "Gdk::GL::ACCUM_ALPHA_SIZE", Gdk::GL::ACCUM_ALPHA_SIZE, false);
std::cout << std::endl;
}
class GearsScene : public Gtk::GL::DrawingArea
{
public:
explicit GearsScene(bool is_sync = true);
virtual ~GearsScene();
protected:
void gear(GLfloat inner_radius,
GLfloat outer_radius,
GLfloat width,
GLint teeth,
GLfloat tooth_depth);
protected:
virtual void on_realize();
virtual bool on_configure_event(GdkEventConfigure* event);
virtual bool on_expose_event(GdkEventExpose* event);
virtual bool on_map_event(GdkEventAny* event);
virtual bool on_unmap_event(GdkEventAny* event);
virtual bool on_visibility_notify_event(GdkEventVisibility* event);
virtual bool on_idle();
public:
void invalidate() {
GtkAllocation allocation = get_allocation();
get_window()->invalidate_rect(Gdk::Rectangle(&allocation), false);
}
void update()
{ get_window()->process_updates(false); }
protected:
SigC::Connection m_ConnectionIdle;
public:
void get_view_rot(GLfloat& x, GLfloat& y, GLfloat& z)
{ x = m_ViewRotX; y = m_ViewRotY; z = m_ViewRotZ; }
void set_view_rot(GLfloat x, GLfloat y, GLfloat z)
{ m_ViewRotX = x; m_ViewRotY = y; m_ViewRotZ = z; }
protected:
GLint m_Gear1;
GLint m_Gear2;
GLint m_Gear3;
GLfloat m_ViewRotX;
GLfloat m_ViewRotY;
GLfloat m_ViewRotZ;
GLfloat m_Angle;
bool m_IsSync;
protected:
Glib::Timer m_Timer;
int m_Frames;
};
GearsScene::GearsScene(bool is_sync)
: m_Gear1(0), m_Gear2(0), m_Gear3(0),
m_ViewRotX(20.0), m_ViewRotY(30.0), m_ViewRotZ(0.0),
m_Angle(0.0), m_IsSync(is_sync),
m_Frames(0)
{
Glib::RefPtr<Gdk::GL::Config> glconfig;
glconfig = Gdk::GL::Config::create(Gdk::GL::MODE_RGB |
Gdk::GL::MODE_DEPTH |
Gdk::GL::MODE_DOUBLE);
if (glconfig.is_null())
{
std::cerr << "*** Cannot find the double-buffered visual.\n"
<< "*** Trying single-buffered visual.\n";
glconfig = Gdk::GL::Config::create(Gdk::GL::MODE_RGB |
Gdk::GL::MODE_DEPTH);
if (glconfig.is_null())
{
std::cerr << "*** Cannot find any OpenGL-capable visual.\n";
std::exit(1);
}
}
GLConfigUtil::examine_gl_attrib(glconfig);
set_gl_capability(glconfig);
add_events(Gdk::VISIBILITY_NOTIFY_MASK);
}
GearsScene::~GearsScene()
{
}
void GearsScene::gear(GLfloat inner_radius,
GLfloat outer_radius,
GLfloat width,
GLint teeth,
GLfloat tooth_depth)
{
GLint i;
GLfloat r0, r1, r2;
GLfloat angle, da;
GLfloat u, v, len;
r0 = inner_radius;
r1 = outer_radius - tooth_depth / 2.0;
r2 = outer_radius + tooth_depth / 2.0;
da = 2.0 * G_PI / teeth / 4.0;
glShadeModel(GL_FLAT);
glNormal3f(0.0, 0.0, 1.0);
glBegin(GL_QUAD_STRIP);
for (i = 0; i <= teeth; i++) {
angle = i * 2.0 * G_PI / teeth;
glVertex3f(r0 * cos(angle), r0 * sin(angle), width * 0.5);
glVertex3f(r1 * cos(angle), r1 * sin(angle), width * 0.5);
if (i < teeth) {
glVertex3f(r0 * cos(angle), r0 * sin(angle), width * 0.5);
glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da), width * 0.5);
}
}
glEnd();
glBegin(GL_QUADS);
da = 2.0 * G_PI / teeth / 4.0;
for (i = 0; i < teeth; i++) {
angle = i * 2.0 * G_PI / teeth;
glVertex3f(r1 * cos(angle), r1 * sin(angle), width * 0.5);
glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), width * 0.5);
glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da), width * 0.5);
glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da), width * 0.5);
}
glEnd();
glNormal3f(0.0, 0.0, -1.0);
glBegin(GL_QUAD_STRIP);
for (i = 0; i <= teeth; i++) {
angle = i * 2.0 * G_PI / teeth;
glVertex3f(r1 * cos(angle), r1 * sin(angle), -width * 0.5);
glVertex3f(r0 * cos(angle), r0 * sin(angle), -width * 0.5);
if (i < teeth) {
glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da), -width * 0.5);
glVertex3f(r0 * cos(angle), r0 * sin(angle), -width * 0.5);
}
}
glEnd();
glBegin(GL_QUADS);
da = 2.0 * G_PI / teeth / 4.0;
for (i = 0; i < teeth; i++) {
angle = i * 2.0 * G_PI / teeth;
glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da), -width * 0.5);
glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da), -width * 0.5);
glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), -width * 0.5);
glVertex3f(r1 * cos(angle), r1 * sin(angle), -width * 0.5);
}
glEnd();
glBegin(GL_QUAD_STRIP);
for (i = 0; i < teeth; i++) {
angle = i * 2.0 * G_PI / teeth;
glVertex3f(r1 * cos(angle), r1 * sin(angle), width * 0.5);
glVertex3f(r1 * cos(angle), r1 * sin(angle), -width * 0.5);
u = r2 * cos(angle + da) - r1 * cos(angle);
v = r2 * sin(angle + da) - r1 * sin(angle);
len = sqrt(u * u + v * v);
u /= len;
v /= len;
glNormal3f(v, -u, 0.0);
glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), width * 0.5);
glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), -width * 0.5);
glNormal3f(cos(angle), sin(angle), 0.0);
glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da), width * 0.5);
glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da), -width * 0.5);
u = r1 * cos(angle + 3 * da) - r2 * cos(angle + 2 * da);
v = r1 * sin(angle + 3 * da) - r2 * sin(angle + 2 * da);
glNormal3f(v, -u, 0.0);
glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da), width * 0.5);
glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da), -width * 0.5);
glNormal3f(cos(angle), sin(angle), 0.0);
}
glVertex3f(r1 * cos(0), r1 * sin(0), width * 0.5);
glVertex3f(r1 * cos(0), r1 * sin(0), -width * 0.5);
glEnd();
glShadeModel(GL_SMOOTH);
glBegin(GL_QUAD_STRIP);
for (i = 0; i <= teeth; i++) {
angle = i * 2.0 * G_PI / teeth;
glNormal3f(-cos(angle), -sin(angle), 0.0);
glVertex3f(r0 * cos(angle), r0 * sin(angle), -width * 0.5);
glVertex3f(r0 * cos(angle), r0 * sin(angle), width * 0.5);
}
glEnd();
}
void GearsScene::on_realize()
{
Gtk::DrawingArea::on_realize();
Glib::RefPtr<Gdk::GL::Drawable> gldrawable = get_gl_drawable();
if (!gldrawable->gl_begin(get_gl_context()))
return;
static GLfloat pos[4] = {5.0, 5.0, 10.0, 0.0};
static GLfloat red[4] = {0.8, 0.1, 0.0, 1.0};
static GLfloat green[4] = {0.0, 0.8, 0.2, 1.0};
static GLfloat blue[4] = {0.2, 0.2, 1.0, 1.0};
glLightfv(GL_LIGHT0, GL_POSITION, pos);
glEnable(GL_CULL_FACE);
glEnable(GL_LIGHTING);
glEnable(GL_LIGHT0);
glEnable(GL_DEPTH_TEST);
m_Gear1 = glGenLists(1);
glNewList(m_Gear1, GL_COMPILE);
glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, red);
gear(1.0, 4.0, 1.0, 20, 0.7);
glEndList();
m_Gear2 = glGenLists(1);
glNewList(m_Gear2, GL_COMPILE);
glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, green);
gear(0.5, 2.0, 2.0, 10, 0.7);
glEndList();
m_Gear3 = glGenLists(1);
glNewList(m_Gear3, GL_COMPILE);
glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, blue);
gear(1.3, 2.0, 0.5, 10, 0.7);
glEndList();
glEnable(GL_NORMALIZE);
std::cout << "GL_RENDERER = " << glGetString(GL_RENDERER) << std::endl;
std::cout << "GL_VERSION = " << glGetString(GL_VERSION) << std::endl;
std::cout << "GL_VENDOR = " << glGetString(GL_VENDOR) << std::endl;
std::cout << "GL_EXTENSIONS = " << glGetString(GL_EXTENSIONS) << std::endl;
std::cout << std::endl;
gldrawable->gl_end();
m_Timer.start();
}
bool GearsScene::on_configure_event(GdkEventConfigure* event)
{
Glib::RefPtr<Gdk::GL::Drawable> gldrawable = get_gl_drawable();
if (!gldrawable->gl_begin(get_gl_context()))
return false;
GLfloat h = (GLfloat)(get_height()) / (GLfloat)(get_width());
glViewport(0, 0, get_width(), get_height());
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glFrustum(-1.0, 1.0, -h, h, 5.0, 60.0);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glTranslatef(0.0, 0.0, -40.0);
gldrawable->gl_end();
return true;
}
bool GearsScene::on_expose_event(GdkEventExpose* event)
{
Glib::RefPtr<Gdk::GL::Drawable> gldrawable = get_gl_drawable();
if (!gldrawable->gl_begin(get_gl_context()))
return false;
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glPushMatrix();
glRotatef(m_ViewRotX, 1.0, 0.0, 0.0);
glRotatef(m_ViewRotY, 0.0, 1.0, 0.0);
glRotatef(m_ViewRotZ, 0.0, 0.0, 1.0);
glPushMatrix();
glTranslatef(-3.0, -2.0, 0.0);
glRotatef(m_Angle, 0.0, 0.0, 1.0);
glCallList(m_Gear1);
glPopMatrix();
glPushMatrix();
glTranslatef(3.1, -2.0, 0.0);
glRotatef(-2.0 * m_Angle - 9.0, 0.0, 0.0, 1.0);
glCallList(m_Gear2);
glPopMatrix();
glPushMatrix();
glTranslatef(-3.1, 4.2, 0.0);
glRotatef(-2.0 * m_Angle - 25.0, 0.0, 0.0, 1.0);
glCallList(m_Gear3);
glPopMatrix();
glPopMatrix();
if (gldrawable->is_double_buffered())
gldrawable->swap_buffers();
else
glFlush();
gldrawable->gl_end();
++m_Frames;
double seconds = m_Timer.elapsed();
if (seconds >= 5.0)
{
std::cout.setf(std::ios::fixed, std::ios::floatfield);
std::cout.precision(3);
std::cout << m_Frames << " frames in "
<< seconds << " seconds = "
<< (m_Frames / seconds) << " FPS\n";
m_Timer.reset();
m_Frames = 0;
}
return true;
}
bool GearsScene::on_map_event(GdkEventAny* event)
{
if (!m_ConnectionIdle.connected())
m_ConnectionIdle = Glib::signal_idle().connect(
SigC::slot(*this, &GearsScene::on_idle), GDK_PRIORITY_REDRAW);
return true;
}
bool GearsScene::on_unmap_event(GdkEventAny* event)
{
if (m_ConnectionIdle.connected())
m_ConnectionIdle.disconnect();
return true;
}
bool GearsScene::on_visibility_notify_event(GdkEventVisibility* event)
{
if (event->state == GDK_VISIBILITY_FULLY_OBSCURED)
{
if (m_ConnectionIdle.connected())
m_ConnectionIdle.disconnect();
}
else
{
if (!m_ConnectionIdle.connected())
m_ConnectionIdle = Glib::signal_idle().connect(
SigC::slot(*this, &GearsScene::on_idle), GDK_PRIORITY_REDRAW);
}
return true;
}
bool GearsScene::on_idle()
{
m_Angle += 2.0;
invalidate();
if (m_IsSync)
update();
return true;
}
class Gears : public Gtk::Window
{
public:
explicit Gears(bool is_sync = true);
virtual ~Gears();
protected:
void on_button_quit_clicked();
virtual bool on_key_press_event(GdkEventKey* event);
protected:
Gtk::VBox m_VBox;
GearsScene m_GearsScene;
Gtk::Button m_ButtonQuit;
};
Gears::Gears(bool is_sync)
: m_VBox(false, 0), m_GearsScene(is_sync), m_ButtonQuit("Quit")
{
set_title("Gears");
set_reallocate_redraws(true);
add(m_VBox);
m_GearsScene.set_size_request(300, 300);
m_VBox.pack_start(m_GearsScene);
m_ButtonQuit.signal_clicked().connect(
SigC::slot(*this, &Gears::on_button_quit_clicked));
m_VBox.pack_start(m_ButtonQuit, Gtk::PACK_SHRINK, 0);
show_all();
}
Gears::~Gears()
{
}
void Gears::on_button_quit_clicked()
{
Gtk::Main::quit();
}
bool Gears::on_key_press_event(GdkEventKey* event)
{
GLfloat x, y, z;
m_GearsScene.get_view_rot(x, y, z);
switch (event->keyval)
{
case GDK_z:
z += 5.0;
break;
case GDK_Z:
z -= 5.0;
break;
case GDK_Up:
x += 5.0;
break;
case GDK_Down:
x -= 5.0;
break;
case GDK_Left:
y += 5.0;
break;
case GDK_Right:
y -= 5.0;
break;
case GDK_Escape:
Gtk::Main::quit();
break;
default:
return true;
}
m_GearsScene.set_view_rot(x, y, z);
m_GearsScene.invalidate();
return true;
}
int main(int argc, char** argv)
{
Gtk::Main kit(argc, argv);
Gtk::GL::init(argc, argv);
bool is_sync = true;
for (int i = 1; i < argc; ++i) {
if (std::strcmp(argv[i], "--async") == 0)
is_sync = false;
}
Gears gears(is_sync);
kit.run(gears);
return 0;
}