void target_closest_enemy::execute_leaf_goal_callback(tree::execution_occurence occ, tree::state_of_traversal& t) const {
if (occ == tree::execution_occurence::LAST)
return;
auto& cosmos = t.step.cosm;
auto subject = t.subject;
auto pos = position(subject);
auto& los = t.step.transient.calculated_line_of_sight.at(subject);
auto& attitude = subject.get<components::attitude>();
entity_id closest_hostile_raw;
float min_distance = std::numeric_limits<float>::max();
for (auto s_raw : los.visible_sentiences) {
auto s = cosmos[s_raw];
auto att = calculate_attitude(s, subject);
if (att == attitude_type::WANTS_TO_KILL || att == attitude_type::WANTS_TO_KNOCK_UNCONSCIOUS) {
auto dist = distance_sq(s, subject);
if (dist < min_distance) {
closest_hostile_raw = s;
min_distance = dist;
}
}
}
auto closest_hostile = cosmos[closest_hostile_raw];
attitude.currently_attacked_visible_entity = closest_hostile;
if (closest_hostile.alive()) {
attitude.is_alert = true;
attitude.last_seen_target_position_inspected = false;
attitude.last_seen_target_position = position(closest_hostile);
attitude.last_seen_target_velocity = velocity(closest_hostile);
}
auto crosshair = subject[sub_entity_name::CHARACTER_CROSSHAIR];
if (crosshair.alive()) {
auto& crosshair_offset = crosshair.get<components::crosshair>().base_offset;
float vel1 = assess_projectile_velocity_of_weapon(subject[slot_function::PRIMARY_HAND].get_item_if_any());
float vel2 = assess_projectile_velocity_of_weapon(subject[slot_function::SECONDARY_HAND].get_item_if_any());
float vel = std::max(vel1, vel2);
if (vel > 1.0 && closest_hostile.alive()) {
vec2 leaded;
if (velocity(closest_hostile).length_sq() > 1)
leaded = position(closest_hostile) + velocity(closest_hostile) * distance(closest_hostile, subject) / vel;// direct_solution(position(closest_hostile), velocity(closest_hostile), vel);
else
leaded = position(closest_hostile);
crosshair_offset = leaded - position(subject);
}
else if (is_entity_physical(subject)) {
crosshair_offset = velocity(subject).length() > 3.0 ? velocity(subject) : vec2(10, 0);
}
else
crosshair_offset = vec2(10, 0);
}
}
void draw_crosshair_lines(
std::function<void(vec2, vec2, rgba)> callback,
std::function<void(vec2, vec2)> dashed_line_callback,
const interpolation_system& interp,
const const_entity_handle crosshair,
const const_entity_handle character) {
if (crosshair.alive()) {
const auto& cosmos = crosshair.get_cosmos();
const auto& physics = cosmos.systems_temporary.get<physics_system>();
vec2 line_from[2];
vec2 line_to[2];
const auto crosshair_pos = crosshair.viewing_transform(interp).pos;
const auto guns = character.guns_wielded();
auto calculate_color = [&](const const_entity_handle target) {
const auto att = calculate_attitude(character, target);
if (att == attitude_type::WANTS_TO_KILL || att == attitude_type::WANTS_TO_KNOCK_UNCONSCIOUS) {
return red;
}
else if (att == attitude_type::WANTS_TO_HEAL) {
return green;
}
else {
return cyan;
}
};
if (guns.size() >= 1) {
const auto subject_item = guns[0];
const auto& gun = subject_item.get<components::gun>();
const auto rifle_transform = subject_item.viewing_transform(interp);
const auto barrel_center = gun.calculate_barrel_center(rifle_transform);
const auto muzzle = gun.calculate_muzzle_position(rifle_transform);
line_from[0] = muzzle;
const auto proj = crosshair_pos.get_projection_multiplier(barrel_center, muzzle);
if (proj > 1.f) {
line_to[0] = barrel_center + (muzzle - barrel_center) * proj;
const auto raycast = physics.ray_cast_px(line_from[0], line_to[0], filters::bullet(), subject_item);
auto col = cyan;
if (raycast.hit) {
dashed_line_callback(raycast.intersection, line_to[0]);
line_to[0] = raycast.intersection;
col = calculate_color(cosmos[raycast.what_entity]);
}
callback(line_from[0], line_to[0], col);
}
}
if (guns.size() >= 2) {
const auto subject_item = guns[1];
const auto& gun = subject_item.get<components::gun>();
const auto rifle_transform = subject_item.viewing_transform(interp);
const auto barrel_center = gun.calculate_barrel_center(rifle_transform);
const auto muzzle = gun.calculate_muzzle_position(rifle_transform);
line_from[1] = muzzle;
const auto proj = crosshair_pos.get_projection_multiplier(barrel_center, muzzle);
if (proj > 1.f) {
line_to[1] = barrel_center + (muzzle - barrel_center) * proj;
const auto raycast = physics.ray_cast_px(line_from[1], line_to[1], filters::bullet(), subject_item);
auto col = cyan;
if (raycast.hit) {
dashed_line_callback(raycast.intersection, line_to[1]);
line_to[1] = raycast.intersection;
col = calculate_color(cosmos[raycast.what_entity]);
}
callback(line_from[1], line_to[1], col);
}
}
}
}
