Unity 6.3 — Animation Module Reference¶

// Install: Package Manager > Animation Rigging
// Runtime IK, aim constraints, procedural animation

// Create: Assets > Create > Animator Controller
// Add to GameObject: Add Component > Animator
// Assign Controller: Animator > Controller = YourAnimatorController

Animator animator = GetComponent<Animator>();

// ✅ Trigger transition
animator.SetTrigger("Jump");

// ✅ Bool parameter
animator.SetBool("IsRunning", true);

// ✅ Float parameter (blend trees)
animator.SetFloat("Speed", currentSpeed);

// ✅ Integer parameter
animator.SetInteger("WeaponType", 2);

// Set layer weight (0-1)
animator.SetLayerWeight(1, 0.5f); // 50% blend

// Idle (Speed = 0) → Walk (Speed = 0.5) → Run (Speed = 1.0)
animator.SetFloat("Speed", moveSpeed);

// X-axis: Strafe (-1 to 1)
// Y-axis: Forward/Back (-1 to 1)
animator.SetFloat("MoveX", input.x);
animator.SetFloat("MoveY", input.y);

// Add in Animation window: Right-click timeline > Add Animation Event
// Must have matching method on GameObject:

public void OnFootstep() {
    // Play footstep sound
    AudioSource.PlayClipAtPoint(footstepClip, transform.position);
}

public void OnAttackHit() {
    // Deal damage
    DealDamageInFrontOfPlayer();
}

Animator animator = GetComponent<Animator>();
animator.applyRootMotion = true; // Move character based on animation

void OnAnimatorMove() {
    // Custom root motion handling
    transform.position += animator.deltaPosition;
    transform.rotation *= animator.deltaRotation;
}

// Install: Package Manager > Animation Rigging
// Add: Rig Builder component + Rig GameObject

// Two Bone IK (Arm/Leg)
// - Add Two Bone IK Constraint
// - Assign Tip (hand/foot), Mid (elbow/knee), Root (shoulder/hip)
// - Set Target (where hand/foot should reach)

// Runtime control:
TwoBoneIKConstraint ikConstraint = rig.GetComponentInChildren<TwoBoneIKConstraint>();
ikConstraint.data.target = targetTransform;
ikConstraint.weight = 1f; // 0-1 blend

// Character looks at target
MultiAimConstraint aimConstraint = rig.GetComponentInChildren<MultiAimConstraint>();
aimConstraint.data.sourceObjects[0] = new WeightedTransform(targetTransform, 1f);

// Create: Assets > Create > Timeline
// Add to GameObject: Add Component > Playable Director
// Assign Timeline: Playable Director > Playable = YourTimeline

// Play from script:
PlayableDirector director = GetComponent<PlayableDirector>();
director.Play();

// Create Signal Asset: Assets > Create > Signals > Signal
// Add Signal Emitter to Timeline track
// Add Signal Receiver component to GameObject

public class CutsceneEvents : MonoBehaviour {
    public void OnDialogueStart() {
        // Triggered by signal
    }
}

// ✅ CrossFade (smooth transition)
animator.CrossFade("Attack", 0.2f); // 0.2s transition

// ✅ Play (instant)
animator.Play("Idle");

// ❌ Avoid: Legacy Animation component
Animation anim = GetComponent<Animation>(); // DEPRECATED

// In Animation window: Add Property > Custom Component > Your Script > Your Float

public class WeaponTrail : MonoBehaviour {
    public float trailIntensity; // Animated by clip

    void Update() {
        // Intensity controlled by animation curve
        trailRenderer.startWidth = trailIntensity;
    }
}

AnimatorStateInfo stateInfo = animator.GetCurrentAnimatorStateInfo(0);
if (stateInfo.IsName("Attack") && stateInfo.normalizedTime >= 1.0f) {
    // Attack animation finished
}

animator.speed = 1.5f; // 150% speed

AnimatorClipInfo[] clipInfo = animator.GetCurrentAnimatorClipInfo(0);
string currentClip = clipInfo[0].clip.name;