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Depending on which way up you want the ship to be afterwards, eitherWildeblood wrote:How do I re-orient the player ship 180 degrees, so its nose is pointing straight back the way it came from?
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player.ship.orientation = player.ship.orientation.rotateX(Math.PI); // as if pitched
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player.ship.orientation = player.ship.orientation.rotateY(Math.PI); // as if yawed
Thanks Svengali, you are a star. Something else to keep me occupied when I'm supposed to be catching up on RL work.Svengali wrote:I've just tried it with another Griff Cobra and indeed setShaders() doesn't do anything, but setMaterials() works.
Unfortunately that's not true. Just try it by stopping immediately after launch and then using it in the console. It results in some rotation that is indeed reversed if you perform the same command again, but it's not a 180 degree rotation. I haven't figured out yet what the correct calculation would be, though.cim wrote:Depending on which way up you want the ship to be afterwards, eitherWildeblood wrote:How do I re-orient the player ship 180 degrees, so its nose is pointing straight back the way it came from?orCode: Select all
player.ship.orientation = player.ship.orientation.rotateX(Math.PI); // as if pitchedCode: Select all
player.ship.orientation = player.ship.orientation.rotateY(Math.PI); // as if yawed
Are you sure? I think that is rotating around the x-axis of the system, not that of the ship. For the ship you need:cim wrote:Depending on which way up you want the ship to be afterwards, eitherorCode: Select all
player.ship.orientation = player.ship.orientation.rotateX(Math.PI); // as if pitchedCode: Select all
player.ship.orientation = player.ship.orientation.rotateY(Math.PI); // as if yawed
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player.ship.orientation = player.ship.orientation.rotate(player.ship.vectorRight, Math.PI); // as if pitched
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player.ship.orientation = player.ship.orientation.rotate(player.ship.vectorUp, Math.PI); // as if yawed
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player.ship.orientation = player.ship.orientation.multiply([0, 1, 0, 0])Code: Select all
player.ship.orientation = player.ship.orientation.multiply([0, 0, 1, 0])Yes, sorry, that's correct. (Of course my test ship happened to be aligned to the system axes...)Eric Walch wrote:Are you sure? I think that is rotating around the x-axis of the system, not that of the ship. For the ship you need:orCode: Select all
player.ship.orientation = player.ship.orientation.rotate(player.ship.vectorRight, Math.PI); // as if pitchedOr, alternatively, you can multiply the players orientation with the quaternion that describes a 180 degr. rotation.Code: Select all
player.ship.orientation = player.ship.orientation.rotate(player.ship.vectorUp, Math.PI); // as if yawed
player.ship.orientation = player.ship.orientation.rotate(player.ship.vectorUp, Math.PI) will do the job. Code: Select all
{
player.ship.launch();
player.ship.orientation = player.ship.orientation.multiply([0, 0, 1, 0]); // Thanks, Eric Walch
}
So, if it did rotate 180 degrees, it would only fly back into the dock anyway. So my second question is how do I give it a thrust or velocity or what-have-you, in the original direction away from the dock, slightly faster than the launch speed?TypeError: player.ship.speed is read-only
This will not be possible for a players ship. The ships thrust will always try to accelerate the ship to make the ship fly forward. For npc you can do a trick by setting thust to zero and than give it a velocity in the desired direction. Without thrust, a ship can't correct this backward motion. But to prevent scripts from fiddling with the player, thrust is read-only for player ships. That means that any backward velocity you give a player, will be fast reduced to zero.Wildeblood wrote:I'm trying to simulate backing out of the dock, rather than launching nose first. So I want to re-orient the ship so forward view is looking at the station, but not change its motion, so it's travelling backwards away from the dock.
Sounds like a job for a frameCallback to me.Eric Walch wrote:This will not be possible for a players ship.Wildeblood wrote:I'm trying to simulate backing out of the dock, rather than launching nose first. So I want to re-orient the ship so forward view is looking at the station, but not change its motion, so it's travelling backwards away from the dock.
This still doesn't seem to be correct.Eric Walch wrote:For [rotating] the ship you need:orCode: Select all
player.ship.orientation = player.ship.orientation.rotate(player.ship.vectorRight, Math.PI); // as if pitchedOr, alternatively and more efficiently if you do a lot of rotations, you can multiply the players orientation with the quaternion that describes a 180 degr. rotation.Code: Select all
player.ship.orientation = player.ship.orientation.rotate(player.ship.vectorUp, Math.PI); // as if yawed
e.g.orCode: Select all
player.ship.orientation = player.ship.orientation.multiply([0, 1, 0, 0])Code: Select all
player.ship.orientation = player.ship.orientation.multiply([0, 0, 1, 0])
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PS.orientation=PS.orientation.multiply([1, 0, 0, 1])Code: Select all
PS.orientation=PS.orientation.multiply([0.707107, 0, 0, 0.707107])
player.ship.orientation = player.ship.orientation.rotate(player.ship.vectorForward, Math.PI); . That makes no reference to the universe, and specifically gives the rotational axis based around the ship (the forward direction in this case).You are right, my code was not correct. The multiplication with a quaternion was right, as that is how oolite lets fly all ships. I just tested once and apparently I was in a correct system to make it work. I had the order wrong and the order is important in quaternion multiplications. What does work it:Commander McLane wrote:or (normalized)However, it doesn't work! In the special case of my ship being aligned to the system's z-axis it does work, but in all other cases I still seem to turn around the system's z-axis, not my own. You can test it by pointing your ship's nose to the planet and entering the above command.Code: Select all
PS.orientation=PS.orientation.multiply([0.707107, 0, 0, 0.707107])
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PS.orientation=new Quaternion(0.707107, 0, 0, 0.707107).multiply(PS.orientation)