@Override
protected void process(int entityId) {
try {
Position p = posMapper.get(entityId);
Rotation r = rotMapper.get(entityId);
Velocity v = velMapper.get(entityId);
if (physMapper.has(entityId)) {
Body body = world.getSystem(PhysicsSystem.class).getBody(entityId);
if (inputMapper.has(entityId)) { // control physics body by input
processPhysicsMovement(body, inputMapper.get(entityId), p, v, r, entityId);
} else { // keep image with body for when physics is acting upon it
p.position.set(body.getPosition());
r.angle = MathUtils.radiansToDegrees * body.getAngle();
v.velocity.set(body.getLinearVelocity());
}
} else { // move image directly since there is no physics body
float d = world.getDelta();
p.position.add(v.velocity.x * d, v.velocity.y * d);
}
// Keep equipment with entity
if (equipMapper.has(entityId)) {
EquipmentList equipmentList = equipMapper.get(entityId);
equipmentList.moveEquipment(boundsMapper, posMapper);
equipmentList.rechargeEquipment(); // TODO: move this to EnergySystem
}
} catch (NullPointerException ex) {
logger.error("MoveSys error; killing offending entity #" + entityId, ex);
world.getEntity(entityId).getComponent(Lifecycle.class).kill();
}
}
private void processPhysicsMovement(
Body body, InputComponent ic, Position pc, Velocity vc, Rotation rc, int id) {
if (body == null) {
logger.error("ERR: cannot process movement for ent#" + id + "; body == null");
lifeCycleMapper.get(id).kill();
return;
}
body.setLinearVelocity(0, 0);
// accelerate
Vector2 force = ic.direction.cpy().nor().scl(ic.speed);
body.applyLinearImpulse(force, body.getWorldCenter(), true);
// update entity
pc.position.set(body.getPosition());
vc.velocity.set(body.getLinearVelocity());
rc.angle = MathUtils.radiansToDegrees * body.getAngle();
}