void Viewer::paintGL() {
glClearColor(0.4, 0.4, 0.4, 0.0);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
sceneRoot->walk_gl(this);
if (showCircle) {
draw_trackball_circle();
}
}
bool Viewer::on_expose_event(GdkEventExpose* event)
{
Glib::RefPtr<Gdk::GL::Drawable> gldrawable = get_gl_drawable();
if (!gldrawable) return false;
if (!gldrawable->gl_begin(get_gl_context()))
return false;
if (zBufferCull)
{
glEnable(GL_DEPTH_TEST);
glDepthMask(GL_TRUE);
}
if (backFaceCull)
{
glEnable(GL_CULL_FACE);
glCullFace(GL_BACK);
}
if (frontFaceCull)
{
glEnable(GL_CULL_FACE);
glCullFace(GL_FRONT);
}
// Set up for perspective drawing
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glViewport(0, 0, get_width(), get_height());
gluPerspective(40.0, (GLfloat)get_width()/(GLfloat)get_height(), 0.1, 1000.0);
// change to model view for drawing
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
// Clear framebuffer
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glEnable(GL_NORMALIZE);
// Set up lighting
// Initialize lighting settings
glShadeModel(GL_SMOOTH);
glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
glEnable(GL_LIGHTING);
// Create one light source
glEnable(GL_LIGHT0);
glEnable(GL_COLOR_MATERIAL);
glColorMaterial(GL_FRONT, GL_AMBIENT_AND_DIFFUSE);
// Define properties of light
float ambientLight0[] = { 0.3f, 0.3f, 0.3f, 1.0f };
float diffuseLight0[] = { 0.8f, 0.8f, 0.8f, 1.0f };
//float specularLight0[] = { 0.6f, 0.6f, 0.6f, 1.0f };
float position0[] = { 0.0f, 0.0f, 0.0f, 1.0f };
glLightfv(GL_LIGHT0, GL_AMBIENT, ambientLight0);
glLightfv(GL_LIGHT0, GL_DIFFUSE, diffuseLight0);
//glLightfv(GL_LIGHT0, GL_SPECULAR, specularLight0);
glLightfv(GL_LIGHT0, GL_POSITION, position0);
// Draw stuff
draw_puppet();
if(drawTrackballCircle)
draw_trackball_circle();
// Swap the contents of the front and back buffers so we see what we
// just drew. This should only be done if double buffering is enabled.
gldrawable->swap_buffers();
gldrawable->gl_end();
return true;
}
bool Viewer::on_expose_event(GdkEventExpose* event)
{
Glib::RefPtr<Gdk::GL::Drawable> gldrawable = get_gl_drawable();
if (!gldrawable) return false;
if (!gldrawable->gl_begin(get_gl_context()))
return false;
//glEnable(GL_CULL_FACE);
//glCullFace(GL_FRONT);
// blending
glEnable (GL_BLEND);
glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
// Set up for perspective drawing
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glViewport(0, 0, get_width(), get_height());
gluPerspective(40.0, (GLfloat)get_width()/(GLfloat)get_height(), 0.1, 1000.0);
// change to model view for drawing
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
// Clear framebuffer{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// Set up lighting
glEnable(GL_LIGHTING);
glEnable(GL_LIGHT0);
// put light behind camera
GLfloat lightpos[] = {0.5f, 1.f, 10.f, 0.f};
glLightfv(GL_LIGHT0, GL_POSITION, lightpos);
GLfloat ambient[] = {0.2f, 0.2f, 0.2f, 1.f};
GLfloat diffuse[] = {0.8f, 0.8, 0.8f, 1.f};
GLfloat specular[] = {1.f, 1.f, 1.f, 1.f};
glLightfv(GL_LIGHT0, GL_AMBIENT, ambient);
glLightfv(GL_LIGHT0, GL_DIFFUSE, diffuse);
glLightfv(GL_LIGHT0, GL_SPECULAR, specular);
glEnable(GL_NORMALIZE);
// toogle options
DEBUG_MSG("Front/Back Cull " << m_frontCull << "/" << m_backCull << " Zbuf " << m_zBuffer);
if (m_frontCull || m_backCull) {
glEnable(GL_CULL_FACE);
if (m_backCull && m_frontCull) {
glCullFace(GL_FRONT_AND_BACK);
}
else if (m_frontCull) {
glCullFace(GL_FRONT);
}
else {
glCullFace(GL_BACK);
}
}
else {
glDisable(GL_CULL_FACE);
}
if (m_zBuffer) {
glEnable(GL_DEPTH_TEST);
glDepthMask(true);
}
else {
glDisable(GL_DEPTH_TEST);
glDepthMask(false);
}
glPushMatrix();
//Matrix4x4 daT = translation(Vector3D(5.0, 0.0, 0.0));
//glMultMatrixd(daT.transpose().begin());
// gl use column order matrix, m4x4 is row order
Matrix4x4 trackballM = m_trackballTranslation * m_trackballRotation;
glMultMatrixd(trackballM.transpose().begin());
// draw model
m_root->walk_gl(false);
// glPushMatrix();
// // push keep into screen
// //glTranslated(0.0, 0.0, -10.0);
// //glTranslated(0.0, 0.0, -20.0);
// GLUquadricObj * quadric = gluNewQuadric();
// gluSphere(quadric, 1.f, 10, 10);
// glPopMatrix();
glPopMatrix();
if (m_drawCircle) {
draw_trackball_circle();
}
// Swap the contents of the front and back buffers so we see what we
// just drew. This should only be done if double buffering is enabled.
gldrawable->swap_buffers();
gldrawable->gl_end();
return true;
}
