Getting total weight of vehicle in the VAB/SPH

[johnqevil]

This is likely a stupid question, but I'm not sure where to start. This is more of a "force myself to learn" project as opposed to something actually useful. I'd like to, for now, get the total weight of an assembled vehicle while in the editor. I don't necessarily need a full-blown howto, but a starting point would be more than I have now.

[m4v]

There's EditorLogic.startPod that always point to the root part, from there you can recursively walk the part's children and calculate the mass. There's also EditorLogic.fetch.getSortedShipList () that directly gives you a list of parts. You might have to deal with part symmetry as well.

[NathanKell]

You should be able to iterate through SortedShipList and add to up all the part.mass + sum(part.Resources amount * density).

[The_Duck]

part.mass + sum(part.Resources amount * density)

Or, more simply, part.mass + part.GetResourceMass().

[DMagic]

Does part.mass take into account the masslessness of physics-disabled parts? You might have to account for that manually.

[m4v]

Does part.mass take into account the masslessness of physics-disabled parts? You might have to account for that manually.

no, you have to check for that manually. And make a special case for the small landing gear, since its physicless is implemented in a hacky way and isn't set until the flight starts.

[johnqevil]

Wow, thanks guys! I think I've got enough to get started now.

[stupid_chris]

Wow, thanks guys! I think I've got enough to get started now.

Basically for RealChute, I did it with a Part extension method and a sum.

//Part extension method, must be in a static class
public static float TotalMass(this Part part)
{
    return part.physicalSignificance != Part.PhysicalSignificance.NONE ? part.mass + part.GetResourceMass() : 0f;
}

//Method to get vessel mass, anywhere else
public float VesselMass()
{
    return EditorLogic.SortedShipList.Sum(p => p.TotalMass());
}

That does the job nicely and keeps it clean and prevent you from having to physiclsless check everytime you want to get mass.