Rotating gravity source engine sdk1/5/2023 ![]() ![]() Since a mod exists to add the portal gun to Team Fortress 2. ![]() Shooting two portals into the floor (as described above) and jumping into them will show that though velocity is maintained through the portals, there is not nearly enough momentum to reach the bridge again - hence, the previously established terminal velocity. There is a large wire bridge very high above a room (it is the one with 12+ sentry robots placed at various nooks and crannies around the room). Likewise, it is very easy to test for a terminal velocity (given that we know there is no air resistance) - again, in Portal, play through the last level until just before GlaD0s. No matter how many passes through the portal, each time she will rise to the same level - i.e. If done correctly, Chell will continuously fall through the one portal, exit through the second, reach the apex, fall back through the portal, and repeat ad infinitum. It's easy to test - simply place two portals on the floor, and fall directly down onto one. When you get to the "top" (the center of the drum), you will feel no net acceleration (assuming your center of mass has arrived at the drum's axis of rotation).At least in Portal, there is no air resistance, though whether this is due to the engine or the game design itself, I'm not sure. While you may stop at any point and be "stationary" on the ladder, you are still moving with the drum's rotation, traveling along a circular path. As you climb the ladder, you will feel lighter and lighter. At the "foot" of the ladder, you are standing on the interior surface of the drum and feel the artificial gravity created by the drum's rotation because you are moving with it. Now, lets add a ladder attached to the inside of one of its end caps leading radially out from the center. If you are free-floating inside it, no matter where you are, you experience no forces/accelerations due to the drum's rotation, because you are not moving with it. Consider a huge, capped drum floating in space, rotating on its axis of radial symmetry. ![]()
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