Method tickMaster

source/game/StarMovementController.cpp:477–692

}

void MovementController::tickMaster(float dt) {
  setTimestep(dt);
  auto geometry = world()->geometry();

  m_zeroG.set(!*m_parameters.gravityEnabled || *m_parameters.gravityMultiplier == 0 || world()->gravity(position()) == 0);

  Maybe<PhysicsMovingCollision> surfaceCollision;
  if (auto movingCollisionId = m_surfaceMovingCollision.get()) {
    if (auto physicsEntity = world()->get<PhysicsEntity>(movingCollisionId->physicsEntityId))
      surfaceCollision = physicsEntity->movingCollision(movingCollisionId->collisionIndex);
  }

  if (surfaceCollision) {
    Vec2F surfacePositionDelta = geometry.diff(surfaceCollision->position, m_surfaceMovingCollisionPosition);
    setPosition(position() + surfacePositionDelta);
    Vec2F newSurfaceVelocity = surfacePositionDelta / dt;
    setVelocity(velocity() - m_surfaceVelocity + newSurfaceVelocity);
    m_surfaceVelocity = newSurfaceVelocity;
  } else {
    m_surfaceMovingCollision.set({});
    m_surfaceMovingCollisionPosition = {};
    m_surfaceVelocity = {};
  }

  if (m_resting) {
    m_restTicks -= 1;
    if (m_restTicks < 0) {
      m_resting = false;
    }
  }

  // don't integrate velocity when resting
  Vec2F relativeVelocity = m_resting ? Vec2F() : velocity();
  Vec2F originalMovement = relativeVelocity * dt;
  if (surfaceCollision)
    relativeVelocity -= m_surfaceVelocity;

  m_collisionCorrection = {};
  m_surfaceSlope = Vec2F(1, 0);
  m_surfaceMovingCollision.set({});

  unsigned steps;
  float maxMovementPerStep = *m_parameters.maxMovementPerStep;
  if (maxMovementPerStep > 0.0f)
    steps = std::floor(vmag(relativeVelocity) * dt / maxMovementPerStep) + 1;
  else
    steps = 1;

  // skip collision checks when resting (there's no movement anyway)
  if (m_resting)
    steps = 0;

  for (unsigned i = 0; i < steps; ++i) {
    float dtSteps = dt / steps;
    Vec2F movement = relativeVelocity * dtSteps;

    if (!*m_parameters.collisionEnabled || collisionPoly().isNull()) {
      setPosition(position() + movement);