108 lines
3 KiB
C#
108 lines
3 KiB
C#
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using UnityEngine;
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using System.Collections;
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namespace RootMotion.FinalIK {
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/// <summary>
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/// Demo script that adds the illusion of mass to your character using FullBodyBipedIK.
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/// </summary>
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public class Inertia : OffsetModifier {
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/// <summary>
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/// Body is just following it's transform in a lazy and bouncy way.
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/// </summary>
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[System.Serializable]
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public class Body {
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/// <summary>
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/// Linking this to an effector
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/// </summary>
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[System.Serializable]
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public class EffectorLink {
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[Tooltip("Type of the FBBIK effector to use")]
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public FullBodyBipedEffector effector;
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[Tooltip("Weight of using this effector")]
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public float weight;
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}
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[Tooltip("The Transform to follow, can be any bone of the character")]
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public Transform transform;
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[Tooltip("Linking the body to effectors. One Body can be used to offset more than one effector")]
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public EffectorLink[] effectorLinks;
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[Tooltip("The speed to follow the Transform")]
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public float speed = 10f;
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[Tooltip("The acceleration, smaller values means lazyer following")]
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public float acceleration = 3f;
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[Tooltip("Matching target velocity")]
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[Range(0f, 1f)] public float matchVelocity;
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[Tooltip("gravity applied to the Body")]
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public float gravity;
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private Vector3 delta;
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private Vector3 lazyPoint;
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private Vector3 direction;
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private Vector3 lastPosition;
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private bool firstUpdate = true;
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// Reset to Transform
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public void Reset() {
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if (transform == null) return;
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lazyPoint = transform.position;
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lastPosition = transform.position;
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direction = Vector3.zero;
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}
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// Update this body, apply the offset to the effector
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public void Update(IKSolverFullBodyBiped solver, float weight, float deltaTime) {
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if (transform == null) return;
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// If first update, set this body to Transform
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if (firstUpdate) {
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Reset();
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firstUpdate = false;
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}
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// Acceleration
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direction = Vector3.Lerp(direction, ((transform.position - lazyPoint) / deltaTime) * 0.01f, deltaTime * acceleration);
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// Lazy follow
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lazyPoint += direction * deltaTime * speed;
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// Match velocity
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delta = transform.position - lastPosition;
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lazyPoint += delta * matchVelocity;
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// Gravity
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lazyPoint.y += gravity * deltaTime;
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// Apply position offset to the effector
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foreach (EffectorLink effectorLink in effectorLinks) {
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solver.GetEffector(effectorLink.effector).positionOffset += (lazyPoint - transform.position) * effectorLink.weight * weight;
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}
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lastPosition = transform.position;
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}
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}
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[Tooltip("The array of Bodies")]
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public Body[] bodies;
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[Tooltip("The array of OffsetLimits")]
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public OffsetLimits[] limits;
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// Reset all Bodies
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public void ResetBodies() {
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lastTime = Time.time;
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foreach (Body body in bodies) body.Reset();
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}
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// Called by IKSolverFullBody before updating
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protected override void OnModifyOffset() {
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// Update the Bodies
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foreach (Body body in bodies) body.Update(ik.solver, weight, deltaTime);
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// Apply the offset limits
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ApplyLimits(limits);
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}
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}
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}
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