Extend bone override capabilities

[appgurueu]

Description

Implements bone overrides supporting position, rotation and scale, all of which can be relative and interpolated.

To do

• Use inline functions/loops instead of copypasted code
• Some renames from bone position -> bone override
• Deprecate set_bone_position and get_bone_position

How to test

Use the new documented API.

[theviper121]

I'm just curious. What is the use case for scaling a bone?

[hecktest]

What is the use case for scaling a bone?

Boob slider =]

Among other things, it's good for FX. And just because, hell, do you need a reason? It's called freedom. You can scale whole objects so why not bones?

@appgurueu
Is it possible to override one of the transform channels for a bone while still animating the others? That would be useful.

[appgurueu]

@appgurueu
Is it possible to override one of the transform channels for a bone while still animating the others? That would be useful.

A value of [property] = { x = 0, y = 0, z = 0, absolute = false, interpolation = 0 } will do the job.

[hecktest]

That's kinda hacky. Why not property=false/nil?

Also, there are more possible spaces than absolute/relative (to what?), maybe that should be a string param on the lua side and an enum on the engine side, to allow further extension.

Check this out:
#10301 (comment)

[appgurueu]

That's kinda hacky. Why not property=false/nil?

Properties default to what I have mentioned above. If you pass {position = ...}, rotation and scale will remain unchanged.

Also, there are more possible spaces than absolute/relative (to what?), maybe that should be a string param on the lua side and an enum on the engine side, to allow further extension.

Yeah

[hecktest]

Oh, so nil is already handled like that. Well, I like this.

[hecktest]

How does this interact with #10705? Does setting an all-nil override make @theviper121 's function redundant?

[appgurueu]

How does this interact with #10705? Does setting an all-nil override make @theviper121 's function redundant?

Yes, although it doesn't delete the override if doing so (could implement tho). Instead it justs sets all (0,0,0)-relative overrides (which equals no override).

[hecktest]

Well uh, I'm thoroughly confused but let me just describe the best possible API:

• nil disables the override on a given channel
• 0,0,0 just freezes the property at that position, and isn't treated as a magic value

Can you do that?

[appgurueu]

Latest commit makes #10705 obsolete

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maybe that should be a string param on the lua side and an enum on the engine side

Yes. Currently it only supports relative = true / false.

Currently, there only are:

• Absolute: Overrides property
• Relative additive: Adds override to animated property

I plan to add:

• Relative multiplicative: Multiplies override with animated property (useful for scale)
• Relative freeze additive: Stops animating property as soon as override is processed, adds override to "frozen" property
• Relative freeze multiplicative: Same as above but multiplies

[rubenwardy]

Closing as WIP with no progress

[appgurueu]

this should be renamed to interpolation_duration

[appgurueu]

Revival of this is at #12388