C++ display::fogged方法代码示例

/**
 * Animates a teleportation between hexes.
 *
 * @param a          The starting hex.
 * @param b          The ending hex.
 * @param temp_unit  The unit to animate (historically, a temporary unit).
 * @param disp       The game display. Assumed neither locked nor faked.
 */
static void teleport_unit_between(const map_location& a, const map_location& b,
                                  unit& temp_unit, display& disp)
{
	if ( disp.fogged(a) && disp.fogged(b) ) {
		return;
	}

	temp_unit.set_location(a);
	if ( !disp.fogged(a) ) { // teleport
		disp.invalidate(a);
		temp_unit.set_facing(a.get_relative_dir(b));
		disp.scroll_to_tiles(a, b, game_display::ONSCREEN, true, 0.0, false);
		unit_animator animator;
		animator.add_animation(&temp_unit,"pre_teleport",a);
		animator.start_animations();
		animator.wait_for_end();
	}

	temp_unit.set_location(b);
	if ( !disp.fogged(b) ) { // teleport
		disp.invalidate(b);
		temp_unit.set_facing(a.get_relative_dir(b));
		disp.scroll_to_tiles(b, a, game_display::ONSCREEN, true, 0.0, false);
		unit_animator animator;
		animator.add_animation(&temp_unit,"post_teleport",b);
		animator.start_animations();
		animator.wait_for_end();
	}

	temp_unit.anim_comp().set_standing();
	disp.update_display();
	events::pump();
}

/**
 * Animates a single step between hexes.
 * This will return before the animation actually finishes, allowing other
 * processing to occur during the animation.
 *
 * @param a          The starting hex.
 * @param b          The ending hex.
 * @param temp_unit  The unit to animate (historically, a temporary unit).
 * @param step_num   The number of steps taken so far (used to pick an animation).
 * @param step_left  The number of steps remaining (used to pick an animation).
 * @param animator   The unit_animator to use. This is assumed clear when we start,
 *                   but will likely not be clear when we return.
 * @param disp       The game display. Assumed neither locked nor faked.
 * @returns  The animation potential until this animation will finish.
 *           INT_MIN indicates that no animation is pending.
 */
static int move_unit_between(const map_location& a, const map_location& b,
                             unit_ptr temp_unit, unsigned int step_num,
                             unsigned int step_left, unit_animator & animator,
                             display& disp)
{
	if ( disp.fogged(a) && disp.fogged(b) ) {
		return INT_MIN;
	}

	temp_unit->set_location(a);
	disp.invalidate(a);
	temp_unit->set_facing(a.get_relative_dir(b));
	animator.replace_anim_if_invalid(temp_unit.get(),"movement",a,b,step_num,
			false,"",0,unit_animation::hit_type::INVALID,nullptr,nullptr,step_left);
	animator.start_animations();
	animator.pause_animation();
	disp.scroll_to_tiles(a, b, game_display::ONSCREEN, true, 0.0, false);
	animator.restart_animation();

	// useless now, previous short draw() just did one
	// new_animation_frame();

	int target_time = animator.get_animation_time_potential();
		// target_time must be short to avoid jumpy move
		// std::cout << "target time: " << target_time << "\n";
	// we round it to the next multiple of 200
	target_time += 200;
	target_time -= target_time%200;

	// This code causes backwards teleport because the time > 200 causes offset > 1.0
	// which will not match with the following -1.0
	// if(  target_time - animator.get_animation_time_potential() < 100 ) target_time +=200;

	return target_time;
}

void positional_source::update_positions(unsigned int time, const display &disp)
{
	int distance_volume = DISTANCE_SILENT;
	for(std::vector<map_location>::iterator i = locations_.begin(); i != locations_.end(); ++i) {
		if(disp.shrouded(*i) || (check_fogged_ && disp.fogged(*i)))
			continue;

		int v = calculate_volume(*i, disp);
		if(v < distance_volume) {
			distance_volume = v;
		}
	}

	if(sound::is_sound_playing(id_)) {
		sound::reposition_sound(id_, distance_volume);
	} else {
		update(time, disp);
	}
}

int positional_source::calculate_volume(const map_location &loc, const display &disp)
{
	assert(range_ > 0);
	assert(faderange_ > 0);

	if((check_shrouded_ && disp.shrouded(loc)) || (check_fogged_ && disp.fogged(loc)))
		return DISTANCE_SILENT;

	SDL_Rect area = disp.map_area();
	map_location center = disp.hex_clicked_on(area.x + area.w / 2, area.y + area.h / 2);
	int distance = distance_between(loc, center);

	if(distance <= range_) {
		return 0;
	}

	return static_cast<int>((((distance - range_)
			/ static_cast<double>(faderange_)) * DISTANCE_SILENT));
}

/// Rather simple test for a hex being fogged.
/// This only exists because is_shrouded() does. (The code looks nicer if
/// the test for being fogged looks similar to the test for being shrouded.)
inline bool is_fogged(const display& disp, const map_location& loc)
{
	return disp.fogged(loc);
}