void
arrow::grow_extent( extent& world)
{
if (degenerate())
return;
double hl, hw, len, sw;
effective_geometry( hw, sw, len, hl, 1.0);
vector x = axis.cross(up).norm() * 0.5;
vector y = axis.cross(x).norm() * 0.5;
vector base = pos + axis.norm()*(len-hl);
for(int i=-1; i<=+1; i+=2)
for(int j=-1; j<=+1; j+=2) {
world.add_point( pos + x*(i*sw) + y*(j*sw) );
world.add_point( base + x*(i*hw) + y*(j*hw) );
}
world.add_point( pos + axis);
world.add_body();
}
void
cone::grow_extent( extent& e)
{
if (degenerate())
return;
e.add_circle( pos, axis.norm(), radius );
e.add_point( pos + axis);
e.add_body();
}
void
convex::grow_extent( extent& world)
{
if (degenerate())
return;
long check = checksum();
if (check != last_checksum) {
recalc();
}
assert( hull.size() != 0);
for (std::vector<face>::const_iterator f = hull.begin(); f != hull.end(); ++f) {
world.add_point( f->corner[0]);
world.add_point( f->corner[1]);
world.add_point( f->corner[2]);
}
world.add_body();
}
void
faces::grow_extent( extent& world)
{
const double* pos_i = pos.data();
const double* pos_end = pos.data( count - count%3 );
while (pos_i < pos_end) {
world.add_point( vector(pos_i));
pos_i += 3; // 3 doubles per vector point
}
world.add_body();
}
void label::grow_extent( extent& e)
{
e.add_point( pos );
}
