void DrawingGlobal::render_frame()
{
initialize();
glEnable(GL_DEPTH_TEST);
glShadeModel(shading);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, diffuse);
glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, specular);
glMaterialfv(GL_FRONT_AND_BACK, GL_SHININESS,shininess);
glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT, ambient);
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
glLoadIdentity();
gluLookAt(
// eye positioning
eye.x,eye.y,eye.z,
eye.x + eye_direction_delta.x, eye.y + eye_direction_delta.y,
eye.z + eye_direction_delta.z,
// camera is oriented so that it's top is in the y direction
0.f,1.f,0.f);
// draw the spline path
gl_draw_spline_path();
// ground plane to follow interpolation itinerary
draw_global_coords();
if (spline != NULL)
{
// draw control points if we're supposed to
if (draw_ctrl_pts)
{
glColor3f(.5f,.5f,.5f);
const ControlVec& cv = spline->control_points();
for (ControlVecCIter citer = cv.begin(); citer != cv.end();
++citer)
{
draw_control_point(*citer);
}
}
// translate model view before drawing
Point3 translate_point;
Quaternion rot_quat;
spline->get_pos(
ticks_since_start*CALLBACK_TIME_MS/1000.,translate_point,rot_quat);
glTranslatef(
translate_point.x,
translate_point.y,
translate_point.z);
glMultMatrixf(rot_quat.gl_mult_matrix());
}
if (bm != NULL)
{
glEnable(GL_TEXTURE_2D);
glTexEnvf(GL_TEXTURE_ENV,GL_TEXTURE_ENV_MODE,GL_REPLACE);
glBindTexture(GL_TEXTURE_2D, texture_id);
}
glColor3f(0.f,0.f,.7f);
for (Face::FaceMapCIter face_citer = fmap->begin();
face_citer != fmap->end(); ++face_citer)
{
Face* f = face_citer->second;
glBegin(gl_begin_type);
if (shading == GL_FLAT)
{
VertexNormal* fnormal = f->face_normal();
const Point3& norm_pt = fnormal->pt();
glNormal3f(norm_pt.x,norm_pt.y,norm_pt.z);
}
for (FaceVertDataVecCIter vert_data_iter = f->vert_iter_begin();
vert_data_iter != f->vert_iter_end(); ++vert_data_iter)
{
Vertex* vert = (*vert_data_iter)->vert;
if (shading == GL_SMOOTH)
{
VertexNormal* vert_normal = vert->avg_normal(*vnmap);
const Point3& norm_pt = vert_normal->pt();
glNormal3f(norm_pt.x,norm_pt.y,norm_pt.z);
}
Vertex* single_vert = (*vert_data_iter)->vert;
const Point3& vert_pt = single_vert->pt();
glVertex3f(vert_pt.x,vert_pt.y,vert_pt.z);
}
glEnd();
}
glPopMatrix(); // matches push from glulookat
glutSwapBuffers();
glFlush();
}
