Constraints - Sublucid Geometry

[utterances-bot]

Constraints - Sublucid Geometry

The essence of constraint is projection.

https://zalo.github.io/blog/constraints/

[zalo]

Please leave your thoughts, comments, and ideas here!

[zalo]

Earlier Comments (from before switching to utterances):

Prashal Goyal:

This is amazing! Didn’t understood what the purpose was but it was fun!

IPEG

The first example code doesn't exactly represent what the demo shows, which is
confusing. The constraint code produces a point that is always on the edge of
the circle, while the demo only moves the black point to the edge of the
circle if it's outside of it =)

Kiran Kumar Y

Awesome 👍 👍 👍

There additional comments in the HackerNews Thread.

[bysameng]

Love these little play visualizations! Would love to be able to edit and play around with some parameters in the examples.

[juanpprieto]

this is great <3. thanks for putting these together for the less mathematical

[mopifish]

This is great! I would've liked more in depth explanations for some of the formulas, but I was able to piece them out, and the demonstrations were really helpful.

For the first formula, as IPEG mentioned, it only produces a point stuck on the egde of the circle. This is because the distance is always the radius of the circle, and doesn't account for when the point is within the circle.

To fix this simply add a line like
distance = min(distance, point.distance_to(anchor))
If the distance between the point and the anchor is less than the radius, then this lets the point inside of the circle.

[bjrnt]

Great visualizations and explanations! It'd be cool to see angle constraints be added to FABRIK or the Distance Constraint Chain to simulate something more a limb.

[avinashtare]

awsome