[SOLVED] Landing Gear Problems.

[Beale]

I don't even know where to begin with this.

But basically my wheel does not have any collision.

It sinks into the floor.

Here is the Unity setup.

Castor_Wheel_A_Base is the mesh for the box that holds the wheel

Wheel is the mesh for the wheel

wheelCollider is the wheel circular collider

Here is the config.

PART
{
// --- general parameters ---
name = Castor_Wheel_A
module = Part
author = Tantares

// --- asset parameters ---

mesh = model.mu
scale = 1.0


// --- node definitions ---

node_attach = 0.0, 0.0, 0.0, 0.0, 1.0, 0.0, 1

// --- FX definitions ---



// --- Sound FX definition ---


// --- editor parameters ---
TechRequired = landing
entryCost = 450
cost = 450
category = Utility
subcategory = 0
title = Castor Wheel
manufacturer = Rolling
description = It spins

// attachment rules: stack, srfAttach, allowStack, allowSrfAttach, allowCollision
attachRules = 1,1,1,1,1


// --- standard part parameters ---
mass = 0.5
dragModelType = default
maximum_drag = 0.3
minimum_drag = 0.2
angularDrag = 1
crashTolerance = 7
maxTemp = 3600 

crashTolerance = 50
breakingForce = 50
breakingTorque = 50

MODULE
{
	name = ModuleLandingGear
}

MODULE
{
	name = ModuleSteering
	controlAxisType = Forward
	steeringAxis = 0, 0, 1
	steeringTransformName = suspensionParent
	steeringLocked = true
	steeringCurve
 	{
   	 key = 0 16
	 key = 10 9
  	 key = 30 2
	 key = 100 1
 	}
}

MODULE
{
	name = FXModuleConstrainPosition
	matchRotation = true
	matchPosition = false
	CONSTRAINFX
	{
		targetName = Steering
		moversName = wheelCollider
	}

}

}

Can anyone help me?

There's really a huge lack of documentation on the Landing Gear module, very frustrating to trial and error.

Many thanks in advance anyone who can help!

Edited September 25, 2014 by Beale

[nli2work]

layers?

27 WheelColliders

26 WheelCollidersIgnore

Edited September 23, 2014 by nli2work

[Beale]

layers?

26 WheelColliders

27 WheelCollidersIgnore

Ah okay, I have no layers set up currently, could you elaborate a bit?

[nli2work]

sorry I had them reversed

here's all the tags and layers you need for KSP

[Beale]

sorry I had them reversed

here's all the tags and layers you need for KSP

http://i.imgur.com/xRBS3AD.jpg

Ah I see! I'll give it a go. Thanks a million!

[Beale]

Hi, sorry to double post, but I've assigned the WheelCollider layer to the wheel collider, re-exported, but still it doesn't work.

Any ideas?

[Starwaster]

I haven't ever modelled a wheel so it's possible I'm talking out of my 'assets' here but that wheel radius value of 0.15 seems a bit small. Maybe that's relevant, maybe not. (you'd think that the collider's actual mesh would be the deciding factor though...)

One other thing, your config: you're using ModuleLandingGear? Is that wheel retractable? If not, you should be using ModuleWheel.

[nli2work]

whats your config file look like?

all else fails, post the unity assets I can take a look at the wheel.

[Beale]

I haven't ever modelled a wheel so it's possible I'm talking out of my 'assets' here but that wheel radius value of 0.15 seems a bit small. Maybe that's relevant, maybe not. (you'd think that the collider's actual mesh would be the deciding factor though...)

One other thing, your config: you're using ModuleLandingGear? Is that wheel retractable? If not, you should be using ModuleWheel.

I'd taken a stab at ModuleWheel and found it even more difficult. The ModuleLandingGear is supposedly simpler

The radius of the wheel collider is along the Z-axis, so it aligns with the wheel (this is hard to put it in words).

But the radius of the wheel is 0.16, so the collider cannot be much bigger, I think...

whats your config file look like?

all else fails, post the unity assets I can take a look at the wheel.

Hi!

MODULE
{
	name = ModuleLandingGear
}

MODULE
{
	name = ModuleSteering
	controlAxisType = Forward
	steeringAxis = 0, 0, 1
	steeringTransformName = Steering
	steeringLocked = true
	steeringCurve
 	{
   	 key = 0 16
	 key = 10 9
  	 key = 30 2
	 key = 100 1
 	}
}

MODULE
{
	name = FXModuleConstrainPosition
	matchRotation = true
	matchPosition = false
	CONSTRAINFX
	{
		targetName = Steering
		moversName = wheelCollider
	}

}

[artwhaley]

It's not an exact fix to your problem... but I had so much trouble getting ModuleLandingGear to work that I switched to the FireSpitter version and had it up and running in 5 minutes. Most people who install mods have Firespitter already, so I didn't mind using it.

[Starwaster]

I'd taken a stab at ModuleWheel and found it even more difficult. The ModuleLandingGear is supposedly simpler

The radius of the wheel collider is along the Z-axis, so it aligns with the wheel (this is hard to put it in words).

But the radius of the wheel is 0.16, so the collider cannot be much bigger, I think...

Oh god, see this is why I shouldn't post just before going to bed. Even though it said radius and I even typed radius, in my mind I was comparing to its diameter.

[nli2work]

sorry I forgot to check OP for the config file.

default value for wheelCollider is WheelCollider //note the capitalization.

best to complete the ModuleLandingGear properly

MODULE
{
name = ModuleLandingGear
wheelCollider = wheelCollider   //name of your wheelCollider object
wheelName = Wheel  //name of your wheel mesh object
suspensionParentName = suspensionParent // name of your suspension object
statusLightName = some light object // not sure if it's required. you can always set its intensity to 0 if you don't want a light.
wheelRotationAxis = 1,0,0 //XYZ format. typically it's X. negative sign will reverse the rotation.
BrakeSpeed = 0.5    //how quickly brake reaches max brake torque. I think it's in seconds
BrakeTorque = 10   // maximum braking torque.
}

you also want the wheelCollider to be slightly smaller than wheel mesh or the wheel might float above the ground slightly.

Edited September 24, 2014 by nli2work

[Beale]

sorry I forgot to check OP for the config file.

default value for wheelCollider is WheelCollider //note the capitalization.

best to complete the ModuleLandingGear properly

MODULE
{
name = ModuleLandingGear
wheelCollider = wheelCollider   //name of your wheelCollider object
wheelName = Wheel  //name of your wheel mesh object
suspensionParentName = suspensionParent // name of your suspension object
statusLightName = some light object // not sure if it's required. you can always set its intensity to 0 if you don't want a light.
wheelRotationAxis = 1,0,0 //XYZ format. typically it's X. negative sign will reverse the rotation.
BrakeSpeed = 0.5    //how quickly brake reaches max brake torque. I think it's in seconds
BrakeTorque = 10   // maximum braking torque.
}

you also want the wheelCollider to be slightly smaller than wheel mesh or the wheel might float above the ground slightly.

I really thank you for your help, but the problem persists no matter how I name the nodes.

The vehicle sinks to the ground.

Wheels have no collision.

[nli2work]

extend the Bounds box to include the tip of wheelCollider ray. or move the wheel collider up a bit so the tip is inside the Bounds box.

another thing with wheelCollider, it doesn't have to be centered up with suspensionParent, the point where it intersects the radius circle and the tip of the ray is the suspension travel distance. onLoad the suspensionParent object is placed at the tip of the wheelCollider ray (the lowest point). moving the wheelCollider above the suspensionParent such that the point of intersection of the ray and radius circle is at the same position as suspensionParent will help to reduce the visible "pop" when the gear is loaded or when it reaches full retracted position.

if that still doesn't work send me the Unity assets I can take a look

Edited September 24, 2014 by nli2work

[Beale]

extend the Bounds box to include the tip of wheelCollider ray. or move the wheel collider up a bit so the tip is inside the Bounds box.

another thing with wheelCollider, it doesn't have to be centered up with suspensionParent, the point where it intersects the radius circle and the tip of the ray is the suspension travel distance. onLoad the suspensionParent object is placed at the tip of the wheelCollider ray (the lowest point). moving the wheelCollider above the suspensionParent such that the point of intersection of the ray and radius circle is at the same position as suspensionParent will help to reduce the visible "pop" when the gear is loaded or when it reaches full retracted position.

if that still doesn't work send me the Unity assets I can take a look

Hmm, I've played around with a few of the transforms, but to no use I'm afraid. collision (or lack of it) issue persists.

Here's the Unity assets.

I mean I would be immensely grateful if you could demonstrate how to get this working!

But no pressure!

I'm annoyed it won't let me give you rep for all the help so far.

[nli2work]

I need the heirarchy setup. drag the Castor_Wheel_A object from Heirarchy panel into Project/Assets panel; that will create a Prefab of the castor wheel setup, it will have a blue cube icon without white paper marker. export the prefab as a unitypackage and include dependencies (OBJ and textures generally)

[Beale]

I need the heirarchy setup. drag the Castor_Wheel_A object from Heirarchy panel into Project/Assets panel; that will create a Prefab of the castor wheel setup, it will have a blue cube icon without white paper marker. export the prefab as a unitypackage and include dependencies (OBJ and textures generally)

Ah, apologies!

Here it is: Wheel

[nli2work]

ModuleLandingGear requires an animation, I didn't think of that. I created a dummy animation with no movement. everything works now. just a matter of adjusting the settings in the wheelCollider and config file now.

I shortened the object names a bit, and removed some intermediate transforms that weren't necessary.

Unity files and part config

http://www./download/9s05x4g7xyef3zx/Castor_Wheel_B.zip

Edited September 24, 2014 by nli2work

[Beale]

ModuleLandingGear requires an animation, I didn't think of that. I created a dummy animation with no movement. everything works now. just a matter of adjusting the settings in the wheelCollider and config file now.

I shortened the object names a bit, and removed some intermediate transforms that weren't necessary.

Unity files and part config

http://www./download/9s05x4g7xyef3zx/Castor_Wheel_B.zip

Just works perfect!

You are a bona-fide star nli2work, thanks for all your hard work with this!

One last thing, when I try to import your Unity Package, is there any way to recreate your hierarchy? It just loads the assets for me.

[nli2work]

You can rename your original prefab to something different, like Castor_Wheel_Original; then import the unity package; the imported Castor_Wheel_A prefab should have the new heirarchy setup.

pic just in case

Edited September 25, 2014 by nli2work

[Beale]

You can rename your original prefab to something different, like Castor_Wheel_Original; then import the unity package; the imported Castor_Wheel_A prefab should have the new heirarchy setup.

pic just in case

http://i.imgur.com/s9OfJGC.jpg

The image is perfect enough! Thanks a million