WIP: Inventory (Patreon)

Here's something I wanted in VAM ever since the first time I tried it out: the models to be able to hold objects. 

Why? for me it adds more immersion and allows more creativity for interactive scenes. For photoshoots it makes things faster and simpler

How it works? The person gets an Inventory plugin. Other objects in the scene that can be grabbed get a Grabbable object. That's it. When the hands collide with a grabbable object, that atom gets linked to the hand. If you grab yourself the atom, it gets removed from the Person's hand. No buttons, no menus, no DIY work required

 I experimented with ways to do it before but never could figure out a way that was clean and simple until recently and got it working quite nicely as a demo. But there's some other stuff I'd love to do to make it better:
- objects position & rotation for the grabbable object: for example a sword should always stick to the palm at a specific angle not just randomly
- other sticky body parts (e.g. to allow accesories for mouth like cigarettes)
- grabbable for Person atom: would allow grabbing specific body parts
- inventory for you! with some work I think i can get this to work in a way that allows you to cary things in VR, like a belt with slots where you can put objects and they stick

I'll throw this in too at the next poll!