void Viewer_2D::draw()
{
// draw some status text
glDisable(GL_LIGHTING);
glColor3f(1,0,0);
std::ostringstream oss;
oss.str("");
oss << "Time-Step: " << time_step_;
glText(20, height_-20, oss.str());
// draw play/pause symbol
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glLoadIdentity();
gluOrtho2D(0, width_, 0, height_);
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
glLoadIdentity();
if (animate_)
{
glBegin(GL_TRIANGLES);
glVertex2i( width_-50, height_-20 );
glVertex2i( width_-50, height_-40 );
glVertex2i( width_-30, height_-30 );
glEnd();
}
else
{
glBegin(GL_QUADS);
glVertex2i( width_-50, height_-20 );
glVertex2i( width_-50, height_-40 );
glVertex2i( width_-45, height_-40 );
glVertex2i( width_-45, height_-20 );
glVertex2i( width_-40, height_-20 );
glVertex2i( width_-40, height_-40 );
glVertex2i( width_-35, height_-40 );
glVertex2i( width_-35, height_-20 );
glEnd();
}
glMatrixMode(GL_PROJECTION);
glPopMatrix();
glMatrixMode(GL_MODELVIEW);
glPopMatrix();
}
void Mass_spring_viewer::draw()
{
// parent's status text
Viewer_2D::draw();
// draw some status text
glDisable(GL_LIGHTING);
glColor3f(1,0,0);
std::ostringstream oss;
oss.str("");
oss << "Integration: ";
switch (integration_)
{
case Euler: oss << "Euler"; break;
case Midpoint: oss << "Midpoint"; break;
case Verlet: oss << "Verlet"; break;
}
glText(20, height_-40, oss.str());
oss.str("");
oss << "#Particles: " << body_.particles.size();
glText(20, height_-60, oss.str());
oss.str("");
oss << "#Springs: " << body_.springs.size();
glText(20, height_-80, oss.str());
oss.str("");
oss << "#Triangles: " << body_.triangles.size();
glText(20, height_-100, oss.str());
oss.str("");
oss << "Area Forces: " << (area_forces_ ? "on" : "off");
glText(20, height_-120, oss.str());
oss.str("");
oss << "Collisions: " << (collisions_ == Force_based ? "force" : "impulse");
glText(20, height_-140, oss.str());
oss.str("");
oss << "External force: ";
switch (external_force_)
{
case None: oss << "None"; break;
case Center: oss << "Center"; break;
case Gravitation: oss << "Gravitation"; break;
}
glText(20, height_-160, oss.str());
oss.str("");
oss << "Visualize forces: " << (show_forces_ ? "on" : "off");
glText(20, height_-180, oss.str());
// draw walls
glDisable(GL_LIGHTING);
glLineWidth(1.0);
glColor3f(0.5,0.5,0.5);
glBegin(GL_LINE_STRIP);
glVertex2f( -1.0, 1.0 );
glVertex2f( -1.0, -1.0 );
glVertex2f( 1.0, -1.0 );
glVertex2f( 1.0, 1.0 );
glVertex2f( -1.0, 1.0 );
glEnd();
// draw mouse spring
if (mouse_spring_.active)
{
glDisable(GL_LIGHTING);
glLineWidth(5.0);
glColor3f(1,0,0);
glBegin(GL_LINES);
glVertex2fv( body_.particles[mouse_spring_.particle_index].position.data() );
glVertex2fv( mouse_spring_.mouse_position.data() );
glEnd();
}
// draw particles, springs, triangles
body_.draw(particle_radius_, show_forces_);
}
