/**
* Initiates the display of movement for the supplied unit.
* This should be called before attempting to display moving to a new hex.
*/
void unit_mover::start(unit_ptr u)
{
// Nothing to do here if there is nothing to animate.
if ( !can_draw_ )
return;
// If no animation then hide unit until end of movement
if ( !animate_ ) {
was_hidden_ = u->get_hidden();
u->set_hidden(true);
return;
}
// This normally does nothing, but just in case...
wait_for_anims();
// Visually replace the original unit with the temporary.
// (Original unit is left on the map, so the unit count is correct.)
replace_temporary(u);
// Initialize our temporary unit for the move.
temp_unit_ptr_->set_location(path_[0]);
temp_unit_ptr_->set_facing(path_[0].get_relative_dir(path_[1]));
temp_unit_ptr_->anim_comp().set_standing(false);
disp_->invalidate(path_[0]);
// If the unit can be seen here by the viewing side:
if ( !is_enemy_ || !temp_unit_ptr_->invisible(path_[0]) ) {
// Scroll to the path, but only if it fully fits on screen.
// If it does not fit we might be able to do a better scroll later.
disp_->scroll_to_tiles(path_, game_display::ONSCREEN, true, true, 0.0, false);
}
// We need to clear big invalidation before the move and have a smooth animation
// (mainly black stripes and invalidation after canceling attack dialog).
// Two draw calls are needed to also redraw the previously invalidated hexes.
// We use update=false because we don't need delay here (no time wasted)
// and no screen refresh (will be done by last 3rd draw() and it optimizes
// the double blitting done by these invalidations).
disp_->draw(false);
disp_->draw(false);
// The last draw() was still slow, and its initial new_animation_frame() call
// is now old, so we do another draw() to get a fresh one
// TODO: replace that by a new_animation_frame() before starting anims
// don't forget to change the previous draw(false) to true
disp_->draw(true);
// extra immobile movement animation for take-off
animator_.add_animation(temp_unit_ptr_.get(), "pre_movement", path_[0], path_[1]);
animator_.start_animations();
animator_.wait_for_end();
animator_.clear();
// Switch the display back to the real unit.
u->set_facing(temp_unit_ptr_->facing());
u->anim_comp().set_standing(false); // Need to reset u's animation so the new facing takes effect.
u->set_hidden(was_hidden_);
temp_unit_ptr_->set_hidden(true);
}
/* Note: Hide the unit in its current location; do not actually remove it.
* Otherwise the status displays will be wrong during the movement.
*/
void unit_mover::replace_temporary(unit_ptr u)
{
if ( disp_ == nullptr )
// No point in creating a temp unit with no way to display it.
return;
// Save the hidden state of the unit.
was_hidden_ = u->get_hidden();
// Make our temporary unit mostly match u...
temp_unit_ptr_ = fake_unit_ptr(unit_ptr(new unit(*u)), resources::fake_units);
// ... but keep the temporary unhidden and hide the original.
temp_unit_ptr_->set_hidden(false);
u->set_hidden(true);
// Update cached data.
is_enemy_ = (*resources::teams)[u->side()-1].is_enemy(disp_->viewing_side());
}