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SkeletonRagdoll.cs
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/
SkeletonRagdoll.cs
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/******************************************************************************
* Spine Runtimes License Agreement
* Last updated January 1, 2020. Replaces all prior versions.
*
* Copyright (c) 2013-2020, Esoteric Software LLC
*
* Integration of the Spine Runtimes into software or otherwise creating
* derivative works of the Spine Runtimes is permitted under the terms and
* conditions of Section 2 of the Spine Editor License Agreement:
* http://esotericsoftware.com/spine-editor-license
*
* Otherwise, it is permitted to integrate the Spine Runtimes into software
* or otherwise create derivative works of the Spine Runtimes (collectively,
* "Products"), provided that each user of the Products must obtain their own
* Spine Editor license and redistribution of the Products in any form must
* include this license and copyright notice.
*
* THE SPINE RUNTIMES ARE PROVIDED BY ESOTERIC SOFTWARE LLC "AS IS" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL ESOTERIC SOFTWARE LLC BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES,
* BUSINESS INTERRUPTION, OR LOSS OF USE, DATA, OR PROFITS) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THE SPINE RUNTIMES, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*****************************************************************************/
// Contributed by: Mitch Thompson
using UnityEngine;
using System.Collections;
using System.Collections.Generic;
namespace Spine.Unity.Examples {
[RequireComponent(typeof(SkeletonRenderer))]
public class SkeletonRagdoll : MonoBehaviour {
static Transform parentSpaceHelper;
#region Inspector
[Header("Hierarchy")]
[SpineBone]
public string startingBoneName = "";
[SpineBone]
public List<string> stopBoneNames = new List<string>();
[Header("Parameters")]
public bool applyOnStart;
[Tooltip("Warning! You will have to re-enable and tune mix values manually if attempting to remove the ragdoll system.")]
public bool disableIK = true;
public bool disableOtherConstraints = false;
[Space(18)]
[Tooltip("Set RootRigidbody IsKinematic to true when Apply is called.")]
public bool pinStartBone;
[Tooltip("Enable Collision between adjacent ragdoll elements (IE: Neck and Head)")]
public bool enableJointCollision;
public bool useGravity = true;
[Tooltip("If no BoundingBox Attachment is attached to a bone, this becomes the default Width or Radius of a Bone's ragdoll Rigidbody")]
public float thickness = 0.125f;
[Tooltip("Default rotational limit value. Min is negative this value, Max is this value.")]
public float rotationLimit = 20;
public float rootMass = 20;
[Tooltip("If your ragdoll seems unstable or uneffected by limits, try lowering this value.")]
[Range(0.01f, 1f)]
public float massFalloffFactor = 0.4f;
[Tooltip("The layer assigned to all of the rigidbody parts.")]
public int colliderLayer = 0;
[Range(0, 1)]
public float mix = 1;
public bool oldRagdollBehaviour = true;
#endregion
ISkeletonAnimation targetSkeletonComponent;
Skeleton skeleton;
Dictionary<Bone, Transform> boneTable = new Dictionary<Bone, Transform>();
Transform ragdollRoot;
public Rigidbody RootRigidbody { get; private set; }
public Bone StartingBone { get; private set; }
Vector3 rootOffset;
public Vector3 RootOffset { get { return this.rootOffset; } }
bool isActive;
public bool IsActive { get { return this.isActive; } }
IEnumerator Start () {
if (parentSpaceHelper == null) {
parentSpaceHelper = (new GameObject("Parent Space Helper")).transform;
parentSpaceHelper.hideFlags = HideFlags.HideInHierarchy;
}
targetSkeletonComponent = GetComponent<SkeletonRenderer>() as ISkeletonAnimation;
if (targetSkeletonComponent == null) Debug.LogError("Attached Spine component does not implement ISkeletonAnimation. This script is not compatible.");
skeleton = targetSkeletonComponent.Skeleton;
if (applyOnStart) {
yield return null;
Apply();
}
}
#region API
public Rigidbody[] RigidbodyArray {
get {
if (!isActive)
return new Rigidbody[0];
var rigidBodies = new Rigidbody[boneTable.Count];
int i = 0;
foreach (Transform t in boneTable.Values) {
rigidBodies[i] = t.GetComponent<Rigidbody>();
i++;
}
return rigidBodies;
}
}
public Vector3 EstimatedSkeletonPosition {
get { return RootRigidbody.position - rootOffset; }
}
/// <summary>Instantiates the ragdoll simulation and applies its transforms to the skeleton.</summary>
public void Apply () {
isActive = true;
mix = 1;
StartingBone = skeleton.FindBone(startingBoneName);
RecursivelyCreateBoneProxies(StartingBone);
RootRigidbody = boneTable[StartingBone].GetComponent<Rigidbody>();
RootRigidbody.isKinematic = pinStartBone;
RootRigidbody.mass = rootMass;
var boneColliders = new List<Collider>();
foreach (var pair in boneTable) {
var b = pair.Key;
var t = pair.Value;
Transform parentTransform;
boneColliders.Add(t.GetComponent<Collider>());
if (b == StartingBone) {
ragdollRoot = new GameObject("RagdollRoot").transform;
ragdollRoot.SetParent(transform, false);
if (b == skeleton.RootBone) { // RagdollRoot is skeleton root.
ragdollRoot.localPosition = new Vector3(b.WorldX, b.WorldY, 0);
ragdollRoot.localRotation = Quaternion.Euler(0, 0, GetPropagatedRotation(b));
} else {
ragdollRoot.localPosition = new Vector3(b.Parent.WorldX, b.Parent.WorldY, 0);
ragdollRoot.localRotation = Quaternion.Euler(0, 0, GetPropagatedRotation(b.Parent));
}
parentTransform = ragdollRoot;
rootOffset = t.position - transform.position;
} else {
parentTransform = boneTable[b.Parent];
}
// Add joint and attach to parent.
var rbParent = parentTransform.GetComponent<Rigidbody>();
if (rbParent != null) {
var joint = t.gameObject.AddComponent<HingeJoint>();
joint.connectedBody = rbParent;
Vector3 localPos = parentTransform.InverseTransformPoint(t.position);
localPos.x *= 1;
joint.connectedAnchor = localPos;
joint.axis = Vector3.forward;
joint.GetComponent<Rigidbody>().mass = joint.connectedBody.mass * massFalloffFactor;
joint.limits = new JointLimits {
min = -rotationLimit,
max = rotationLimit,
};
joint.useLimits = true;
joint.enableCollision = enableJointCollision;
}
}
// Ignore collisions among bones.
for (int x = 0; x < boneColliders.Count; x++) {
for (int y = 0; y < boneColliders.Count; y++) {
if (x == y) continue;
Physics.IgnoreCollision(boneColliders[x], boneColliders[y]);
}
}
// Destroy existing override-mode SkeletonUtilityBones.
var utilityBones = GetComponentsInChildren<SkeletonUtilityBone>();
if (utilityBones.Length > 0) {
var destroyedUtilityBoneNames = new List<string>();
foreach (var ub in utilityBones) {
if (ub.mode == SkeletonUtilityBone.Mode.Override) {
destroyedUtilityBoneNames.Add(ub.gameObject.name);
Destroy(ub.gameObject);
}
}
if (destroyedUtilityBoneNames.Count > 0) {
string msg = "Destroyed Utility Bones: ";
for (int i = 0; i < destroyedUtilityBoneNames.Count; i++) {
msg += destroyedUtilityBoneNames[i];
if (i != destroyedUtilityBoneNames.Count - 1) {
msg += ",";
}
}
Debug.LogWarning(msg);
}
}
// Disable skeleton constraints.
if (disableIK) {
var ikConstraints = skeleton.IkConstraints;
for (int i = 0, n = ikConstraints.Count; i < n; i++)
ikConstraints.Items[i].Mix = 0;
}
if (disableOtherConstraints) {
var transformConstraints = skeleton.TransformConstraints;
for (int i = 0, n = transformConstraints.Count; i < n; i++) {
transformConstraints.Items[i].RotateMix = 0;
transformConstraints.Items[i].ScaleMix = 0;
transformConstraints.Items[i].ShearMix = 0;
transformConstraints.Items[i].TranslateMix = 0;
}
var pathConstraints = skeleton.PathConstraints;
for (int i = 0, n = pathConstraints.Count; i < n; i++) {
pathConstraints.Items[i].RotateMix = 0;
pathConstraints.Items[i].TranslateMix = 0;
}
}
targetSkeletonComponent.UpdateWorld += UpdateSpineSkeleton;
}
/// <summary>Transitions the mix value from the current value to a target value.</summary>
public Coroutine SmoothMix (float target, float duration) {
return StartCoroutine(SmoothMixCoroutine(target, duration));
}
IEnumerator SmoothMixCoroutine (float target, float duration) {
float startTime = Time.time;
float startMix = mix;
while (mix > 0) {
skeleton.SetBonesToSetupPose();
mix = Mathf.SmoothStep(startMix, target, (Time.time - startTime) / duration);
yield return null;
}
}
/// <summary>Set the transform world position while preserving the ragdoll parts world position.</summary>
public void SetSkeletonPosition (Vector3 worldPosition) {
if (!isActive) {
Debug.LogWarning("Can't call SetSkeletonPosition while Ragdoll is not active!");
return;
}
Vector3 offset = worldPosition - transform.position;
transform.position = worldPosition;
foreach (Transform t in boneTable.Values)
t.position -= offset;
UpdateSpineSkeleton(null);
skeleton.UpdateWorldTransform();
}
/// <summary>Removes the ragdoll instance and effect from the animated skeleton.</summary>
public void Remove () {
isActive = false;
foreach (var t in boneTable.Values)
Destroy(t.gameObject);
Destroy(ragdollRoot.gameObject);
boneTable.Clear();
targetSkeletonComponent.UpdateWorld -= UpdateSpineSkeleton;
}
public Rigidbody GetRigidbody (string boneName) {
var bone = skeleton.FindBone(boneName);
return (bone != null && boneTable.ContainsKey(bone)) ? boneTable[bone].GetComponent<Rigidbody>() : null;
}
#endregion
void RecursivelyCreateBoneProxies (Bone b) {
string boneName = b.Data.Name;
if (stopBoneNames.Contains(boneName))
return;
var boneGameObject = new GameObject(boneName);
boneGameObject.layer = colliderLayer;
Transform t = boneGameObject.transform;
boneTable.Add(b, t);
t.parent = transform;
t.localPosition = new Vector3(b.WorldX, b.WorldY, 0);
t.localRotation = Quaternion.Euler(0, 0, b.WorldRotationX - b.ShearX);
t.localScale = new Vector3(b.WorldScaleX, b.WorldScaleY, 1);
// MITCH: You left "todo: proper ragdoll branching"
var colliders = AttachBoundingBoxRagdollColliders(b);
if (colliders.Count == 0) {
float length = b.Data.Length;
if (length == 0) {
var ball = boneGameObject.AddComponent<SphereCollider>();
ball.radius = thickness * 0.5f;
} else {
var box = boneGameObject.AddComponent<BoxCollider>();
box.size = new Vector3(length, thickness, thickness);
box.center = new Vector3(length * 0.5f, 0);
}
}
var rb = boneGameObject.AddComponent<Rigidbody>();
rb.constraints = RigidbodyConstraints.FreezePositionZ;
foreach (Bone child in b.Children)
RecursivelyCreateBoneProxies(child);
}
void UpdateSpineSkeleton (ISkeletonAnimation skeletonRenderer) {
bool flipX = skeleton.ScaleX < 0;
bool flipY = skeleton.ScaleY < 0;
bool flipXOR = flipX ^ flipY;
bool flipOR = flipX || flipY;
foreach (var pair in boneTable) {
var b = pair.Key;
var t = pair.Value;
bool isStartingBone = b == StartingBone;
Transform parentTransform = isStartingBone ? ragdollRoot : boneTable[b.Parent];
if (!oldRagdollBehaviour && isStartingBone) {
if (b != skeleton.RootBone) { // RagdollRoot is not skeleton root.
ragdollRoot.localPosition = new Vector3(b.Parent.WorldX, b.Parent.WorldY, 0);
ragdollRoot.localRotation = Quaternion.Euler(0, 0, GetPropagatedRotation(b.Parent));
}
}
Vector3 parentTransformWorldPosition = parentTransform.position;
Quaternion parentTransformWorldRotation = parentTransform.rotation;
parentSpaceHelper.position = parentTransformWorldPosition;
parentSpaceHelper.rotation = parentTransformWorldRotation;
parentSpaceHelper.localScale = parentTransform.localScale;
Vector3 boneWorldPosition = t.position;
Vector3 right = parentSpaceHelper.InverseTransformDirection(t.right);
Vector3 boneLocalPosition = parentSpaceHelper.InverseTransformPoint(boneWorldPosition);
float boneLocalRotation = Mathf.Atan2(right.y, right.x) * Mathf.Rad2Deg;
if (flipOR) {
if (isStartingBone) {
if (flipX) boneLocalPosition.x *= -1f;
if (flipY) boneLocalPosition.y *= -1f;
boneLocalRotation = boneLocalRotation * (flipXOR ? -1f : 1f);
if (flipX) boneLocalRotation += 180;
} else {
if (flipXOR) {
boneLocalRotation *= -1f;
boneLocalPosition.y *= -1f; // wtf??
}
}
}
b.X = Mathf.Lerp(b.X, boneLocalPosition.x, mix);
b.Y = Mathf.Lerp(b.Y, boneLocalPosition.y, mix);
b.Rotation = Mathf.Lerp(b.Rotation, boneLocalRotation, mix);
//b.AppliedRotation = Mathf.Lerp(b.AppliedRotation, boneLocalRotation, mix);
}
}
List<Collider> AttachBoundingBoxRagdollColliders (Bone b) {
const string AttachmentNameMarker = "ragdoll";
var colliders = new List<Collider>();
Transform t = boneTable[b];
GameObject go = t.gameObject;
var skin = skeleton.Skin ?? skeleton.Data.DefaultSkin;
var skinEntries = new List<Skin.SkinEntry>();
foreach (Slot s in skeleton.Slots) {
if (s.Bone == b) {
skin.GetAttachments(skeleton.Slots.IndexOf(s), skinEntries);
foreach (var entry in skinEntries) {
var bbAttachment = entry.Attachment as BoundingBoxAttachment;
if (bbAttachment != null) {
if (!entry.Name.ToLower().Contains(AttachmentNameMarker))
continue;
var bbCollider = go.AddComponent<BoxCollider>();
var bounds = SkeletonUtility.GetBoundingBoxBounds(bbAttachment, thickness);
bbCollider.center = bounds.center;
bbCollider.size = bounds.size;
colliders.Add(bbCollider);
}
}
}
}
return colliders;
}
static float GetPropagatedRotation (Bone b) {
Bone parent = b.Parent;
float a = b.AppliedRotation;
while (parent != null) {
a += parent.AppliedRotation;
parent = parent.Parent;
}
return a;
}
public class LayerFieldAttribute : PropertyAttribute {}
}
}