sl-service-account
commented
2 years ago Lucia Nightfire commented at 2022-02-09T22:37:25Z, updated at 2022-02-09T22:40:26Z
This "reads" like an attempt to offer something similar to global target references and IK feedback effect, the "global target and IK insertion" protocol I've been saying we've needed for years.
My only critique is that the constraints seem to lack bone local pos/rot offset, weighting and motion range like point/plane.
Also, I don't think target names will work. Object/Agent keys would be needed instead.
How would you like the feature to work?
My proposal is to add support for 'Auxiliary' constraints to our animations, by adding some new supported target volume names to the animation format.
For the sake of being able to animate bones in relation to multiple objects/avatars at once, I propose we have 3 auxiliary slots that we can target to things. For the sake of discussion, lets call them {_}AUX1{}, _AUX2 and {_}AUX3{}.
From a script, we could tell the viewer what each of these Auxiliary constraints point to, using a new function which I propose as follows
- key target - Agent key or object key.
- string target_volume - Agents only. One of the target volume names supported by the animation format such as L_HAND etc.
## Examples:
### Reach out and hold an object
Lets say we create an animation where the avatar should reach out and hold an object in world and look at that object. Our animation "{_}reach_out_and_touchthis{}" has {_}LHAND{}, _RHAND and HEAD constrained to _AUX1. the animation does not contain any rotation information for our joints but does contain basic offset information in the constraints.
The following code snippet would cause our avatar to reach out and hold our _shinyobject with both hands.
java<br> <br>llSetConstraintTarget(AUX_1, shiny_object, ""); <br>llStartAnimation("reach_out_and_touch_this"); <br>As the object moves around in world, our hands will attempt to follow the object because they are constrained to the object.
This could be useful for all sorts of things. Catch a ball, pick up an object, open a door (with your hand on the door handle). Get on a bicycle and have your hands and feet placed correctly, and animate correctly. There are many many, many more possibilities.
### Hold hands
Auxiliary constraints would allow us to better connect with other avatars in our world. For example, we could create hand holding animations where the hands will always line up.
Lets say we create our animation "hold_hands_l" and constrain our R_HAND to AUX_1. If we target _AUX1 to {_}mypartner{}'s left hand, our right hand will reach for their left!
java<br> <br>llSetConstraintTarget(AUX_1, my_partner, "L_HAND"); <br>llStartAnimation("hold_hands_l"); <br>Now we just need to play hold_hands_r from my partners avatar, and we're both holding hands together. Our hands are constrained to each other and will always line up, no matter if we are big or small.
Humans make contact with each other in all sorts of ways, and this could be used for more than just hand holding. Maybe you need to seal the deal and shake hands at a business meeting. High five your team mate, or kiss your loved one. With auxiliary constraints, you'd never miss!
# Why is this feature important to you? How would it benefit the community?
I think that what would help 'sell' the idea that SecondLife is a truly connected virtual world is if our Avatars could be animated in such a way that they really were 'connected' to it, with bones moving in relation to objects and people in-world.
SecondLife is already part way there. It has animation constraint support (IK) which in laymans terms allows one bone to move in relation to another. In technical terms this is done through 'target volumes' for example we can target L_HAND to HEAD to move our hand in relation to our head.|
Original Jira Fields
| Field | Value | | ------------- | ------------- | | Issue | BUG-231771 | | Summary | Avatar "Connectedness" - Auxiliary Animation Constraints | | Type | New Feature Request | | Priority | Unset | | Status | Accepted | | Resolution | Accepted | | Reporter | Extrude Ragu (extrude.ragu) | | Created at | 2022-02-09T18:47:27Z | | Updated at | 2022-02-16T18:53:41Z | ``` { 'Build Id': 'unset', 'Business Unit': ['Platform'], 'Date of First Response': '2022-02-09T16:37:25.456-0600', 'How would you like the feature to work?': 'Using the full fat editor', 'ReOpened Count': 0.0, 'Severity': 'Unset', 'Target Viewer Version': 'viewer-development', 'Why is this feature important to you? How would it benefit the community?': 'Check back later', } ```