Module animation 

Chaos RPG Animation State Machines, Blend Trees, and IK

Wires the Proof Engine animation infrastructure into the Chaos RPG game loop. Every entity is an amorphous cluster of glyphs — animation here means driving per-glyph transforms (position offsets, scale, rotation, emission) through state machines, blend trees, and simplified inverse kinematics.

Structs

AnimPose

A snapshot of per-glyph transforms for an entire entity.

AnimTransitionDef

Defines a transition between two animation states.

AnimationManager

Centralized animation manager owning all active controllers.

AttackPowerBlend

AttackPowerBlend: parameter = force_stat [0, 1], blends light swing into heavy swing.

BlendTree1D

A 1D blend tree: interpolates between poses based on a single float parameter.

BossAnimController

Per-boss animation controller wrapping EnemyAnimController with boss-specific logic.

CastIntensityBlend

CastIntensityBlend: parameter = mana_cost_fraction, small cast → large cast.

DamageReactionBlend

DamageReactionBlend: parameter = damage_fraction [0, 1], small → large recoil.

EnemyAnimController

Simpler animation controller for enemies.

GlyphTransform

Transform applied to a single glyph within an entity.

IKChain

A simplified 2-bone IK chain operating on glyph positions.

IKLimb

Named IK chain for a specific limb/purpose.

IdleWalkBlend

IdleWalkBlend: parameter = movement_speed [0, 1], blends idle bob into walk bob.

PlayerAnimController

Drives per-glyph transforms for a player entity based on the current state.

Enums

AlgorithmAnimState

Algorithm boss: multi-phase encounter with entity reorganization.

BlendCurve

Easing function applied during state transitions.

BossState

Unified boss state enum.

CommitteeAnimState

Committee boss: judges that vote on player fate.

EnemyAnimState

Base enemy animation states.

HydraAnimState

Hydra boss: can split and reform.

IKTarget

What an IK chain is targeting.

PlayerAnimState

All possible player animation states in the Chaos RPG.

Functions

build_transition_table

Return the full transition table as a Vec (useful for inspection/serialization).

look_at_ik

Create a look-at IK limb for head/eye orientation.

shield_ik

Create a shield IK limb that positions between player and threat.

solve_two_bone

Analytical two-bone IK solver.

staff_aim_ik

Create a staff-aim IK limb for mage casting.

weapon_arm_ik

Create a weapon-arm IK limb that aims at the current target enemy.