Bug #4874
Updated by Squelch almost 9 years ago
If a launch Clamp is placed outside of the safe area on the launchpad the clamp can be seen to follow the vessel.
h3. Reproduction
# Open KerbalX in the VAB
# Move the whole vessel such that a launch clamp is outside of the following floor markings:
* The large circle
* within the small squares either side
# Launch the vessel and observe the flight.
h3. Observed
A launch clamp can be seen to fall past the craft in flight at around 6000m, and every subsequent 6000m mark.
The launch clamp may follow the craft into space.
h3. Notes
The large thick circle, and the two small squares either side of the VAB floor mark the bounds of the launch pad. Exceeding or getting very close to these bounds with a launch clamp can trigger this bug. If this cannot be avoided, saving the game (Alt+F5) and immediately after launch and then reloading loading (Alt+F9) will clear the condition.
h3. Original report follows:
I first noticed it when trying to fly a huge ship (almost 2000 parts, see attached image including clamps), then I reduced it to around 500 parts of initial setup. The issue is deterministically reproducible on my PC but might depend on how powerful the PC is.
In the described case, launch clamps appear at 6000, 12000, 18000, and 24000 meters, then if I keep switching between ship and them they spawn near the ship and follow it. They are material and can destroy the ship if it rotates in a way that makes them spawn over ship's parts.
The scenario is harder to reproduce or fails to reproduce with less parts - suggests it's some kind of race condition where cleanup of physics frame does not finish before it is used or something like that.
Reproduction:
- load the attached quicksave
- set full throttle
- press Space to launch
- wait till the ship reaches 6000 m. At that point, a "click" can be usually heard in the rocket's noise. Use [ or ] to switch to spawned clamps.
Image album documenting the reproduction scenario as run on my PC:
http://imgur.com/a/662vV
h3. Reproduction
# Open KerbalX in the VAB
# Move the whole vessel such that a launch clamp is outside of the following floor markings:
* The large circle
* within the small squares either side
# Launch the vessel and observe the flight.
h3. Observed
A launch clamp can be seen to fall past the craft in flight at around 6000m, and every subsequent 6000m mark.
The launch clamp may follow the craft into space.
h3. Notes
The large thick circle, and the two small squares either side of the VAB floor mark the bounds of the launch pad. Exceeding or getting very close to these bounds with a launch clamp can trigger this bug. If this cannot be avoided, saving the game (Alt+F5) and immediately after launch and then reloading loading (Alt+F9) will clear the condition.
h3. Original report follows:
I first noticed it when trying to fly a huge ship (almost 2000 parts, see attached image including clamps), then I reduced it to around 500 parts of initial setup. The issue is deterministically reproducible on my PC but might depend on how powerful the PC is.
In the described case, launch clamps appear at 6000, 12000, 18000, and 24000 meters, then if I keep switching between ship and them they spawn near the ship and follow it. They are material and can destroy the ship if it rotates in a way that makes them spawn over ship's parts.
The scenario is harder to reproduce or fails to reproduce with less parts - suggests it's some kind of race condition where cleanup of physics frame does not finish before it is used or something like that.
Reproduction:
- load the attached quicksave
- set full throttle
- press Space to launch
- wait till the ship reaches 6000 m. At that point, a "click" can be usually heard in the rocket's noise. Use [ or ] to switch to spawned clamps.
Image album documenting the reproduction scenario as run on my PC:
http://imgur.com/a/662vV