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);
}
}
}
}
ltrb basic_renderable_mixin<C, D>::get_aabb(const interpolation_system& interp, const renderable_positioning_type type) const {
const auto handle = *static_cast<const D*>(this);
return get_aabb(handle.viewing_transform(interp, true), type);
}
