The backward pass: pins the base and pushes each bone outward from it.
Basebone constraints and hinge reference-axis limits are applied here only - the forward pass skips the latter, because clamping on both degrades the solution.
the chain to move, mutated in place
where the base should go, used only when chain.fixedBase is set
chain.fixedBase
the chain
The backward pass: pins the base and pushes each bone outward from it.
Basebone constraints and hinge reference-axis limits are applied here only - the forward pass skips the latter, because clamping on both degrades the solution.