+bool PlayerSAO::checkMovementCheat()
+{
+ if (isAttached() || m_is_singleplayer ||
+ g_settings->getBool("disable_anticheat")) {
+ m_last_good_position = m_base_position;
+ return false;
+ }
+
+ bool cheated = false;
+ /*
+ Check player movements
+
+ NOTE: Actually the server should handle player physics like the
+ client does and compare player's position to what is calculated
+ on our side. This is required when eg. players fly due to an
+ explosion. Altough a node-based alternative might be possible
+ too, and much more lightweight.
+ */
+
+ float player_max_walk = 0; // horizontal movement
+ float player_max_jump = 0; // vertical upwards movement
+
+ if (m_privs.count("fast") != 0)
+ player_max_walk = m_player->movement_speed_fast; // Fast speed
+ else
+ player_max_walk = m_player->movement_speed_walk; // Normal speed
+ player_max_walk *= m_physics_override_speed;
+ player_max_jump = m_player->movement_speed_jump * m_physics_override_jump;
+ // FIXME: Bouncy nodes cause practically unbound increase in Y speed,
+ // until this can be verified correctly, tolerate higher jumping speeds
+ player_max_jump *= 2.0;
+
+ // Don't divide by zero!
+ if (player_max_walk < 0.0001f)
+ player_max_walk = 0.0001f;
+ if (player_max_jump < 0.0001f)
+ player_max_jump = 0.0001f;
+
+ v3f diff = (m_base_position - m_last_good_position);
+ float d_vert = diff.Y;
+ diff.Y = 0;
+ float d_horiz = diff.getLength();
+ float required_time = d_horiz / player_max_walk;
+
+ // FIXME: Checking downwards movement is not easily possible currently,
+ // the server could calculate speed differences to examine the gravity
+ if (d_vert > 0) {
+ // In certain cases (water, ladders) walking speed is applied vertically
+ float s = MYMAX(player_max_jump, player_max_walk);
+ required_time = MYMAX(required_time, d_vert / s);
+ }
+
+ if (m_move_pool.grab(required_time)) {
+ m_last_good_position = m_base_position;
+ } else {
+ const float LAG_POOL_MIN = 5.0;
+ float lag_pool_max = m_env->getMaxLagEstimate() * 2.0;
+ lag_pool_max = MYMAX(lag_pool_max, LAG_POOL_MIN);
+ if (m_time_from_last_teleport > lag_pool_max) {
+ actionstream << "Player " << m_player->getName()
+ << " moved too fast; resetting position"
+ << std::endl;
+ cheated = true;
+ }
+ setBasePosition(m_last_good_position);
+ }
+ return cheated;
+}
+
+bool PlayerSAO::getCollisionBox(aabb3f *toset) const
+{
+ //update collision box
+ toset->MinEdge = m_prop.collisionbox.MinEdge * BS;
+ toset->MaxEdge = m_prop.collisionbox.MaxEdge * BS;
+
+ toset->MinEdge += m_base_position;
+ toset->MaxEdge += m_base_position;
+ return true;
+}
+
+bool PlayerSAO::getSelectionBox(aabb3f *toset) const
+{
+ if (!m_prop.is_visible || !m_prop.pointable) {
+ return false;
+ }
+
+ toset->MinEdge = m_prop.selectionbox.MinEdge * BS;
+ toset->MaxEdge = m_prop.selectionbox.MaxEdge * BS;
+
+ return true;
+}
+
+float PlayerSAO::getZoomFOV() const
+{
+ return m_prop.zoom_fov;
+}