axmol/cocos/3d/CCSkeleton3D.cpp

/****************************************************************************
 Copyright (c) 2014 Chukong Technologies Inc.

 http://www.cocos2d-x.org

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 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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 ****************************************************************************/

#include "3d/CCSkeleton3D.h"
#include "3d/CCBundle3D.h"

#include "base/ccMacros.h"
#include "base/CCPlatformMacros.h"
#include "platform/CCFileUtils.h"

NS_CC_BEGIN

/**
 * Sets the inverse bind pose matrix.
 *
 * @param m C3DMatrix representing the inverse bind pose for this Bone.
 */
void Bone3D::setInverseBindPose(const Mat4& m)
{
    _invBindPose = m;
}

const Mat4& Bone3D::getInverseBindPose()
{
    return _invBindPose;
}

void Bone3D::setOriPose(const Mat4& m)
{
    _oriPose = m;
}

void Bone3D::resetPose()
{
    _local =_oriPose;
    
    for (auto it : _children) {
        it->resetPose();
    }
}

void Bone3D::setWorldMatDirty(bool dirty)
{
    _worldDirty = dirty;
    for (auto it : _children) {
        it->setWorldMatDirty(dirty);
    }
}

//update own world matrix and children's
void Bone3D::updateWorldMat()
{
    getWorldMat();
    for (auto itor : _children) {
        itor->updateWorldMat();
    }
}

const Mat4& Bone3D::getWorldMat()
{
    if (_worldDirty)
    {
        updateLocalMat();
        if (_parent)
        {
            _world = _parent->getWorldMat() * _local;
        }
        else
            _world = _local;
        
        _worldDirty = false;
    }
    
    return _world;
}

void Bone3D::setAnimationValue(float* trans, float* rot, float* scale, void* tag, float weight)
{
    for (auto& it : _blendStates) {
        if (it.tag == tag)
        {
            if (trans)
                it.localTranslate.set(trans);
            if (rot)
                it.localRot.set(rot);
            if (scale)
                it.localScale.set(scale);
            it.weight = weight;
            return;
        }
    }
    BoneBlendState state;
    if (trans)
        state.localTranslate.set(trans);
    if (rot)
        state.localRot.set(rot);
    if (scale)
        state.localScale.set(scale);
    
    state.weight = weight;
    state.tag = tag;
    
    _blendStates.push_back(state);
}

void Bone3D::clearBoneBlendState()
{
    _blendStates.clear();
    for (auto it : _children) {
        it->clearBoneBlendState();
    }
}

/**
 * Creates C3DBone.
 */
Bone3D* Bone3D::create(const std::string& id)
{
    auto bone = new Bone3D(id);
    bone->autorelease();
    return bone;
}

void Bone3D::updateJointMatrix(Vec4* matrixPalette)
{
    {
        static Mat4 t;
        Mat4::multiply(_world, getInverseBindPose(), &t);

        matrixPalette[0].set(t.m[0], t.m[4], t.m[8], t.m[12]);
        matrixPalette[1].set(t.m[1], t.m[5], t.m[9], t.m[13]);
        matrixPalette[2].set(t.m[2], t.m[6], t.m[10], t.m[14]);
    }
}

Bone3D* Bone3D::getParentBone()
{
    return _parent;
}
ssize_t Bone3D::getChildBoneCount() const
{
    return _children.size();
}
Bone3D* Bone3D::getChildBoneByIndex(int index) const
{
    return _children.at(index);
}
void Bone3D::addChildBone(Bone3D* bone)
{
    if (_children.find(bone) == _children.end())
       _children.pushBack(bone);
}
void Bone3D::removeChildBoneByIndex(int index)
{
    _children.erase(index);
}
void Bone3D::removeChildBone(Bone3D* bone)
{
    _children.eraseObject(bone);
}
void Bone3D::removeAllChildBone()
{
    _children.clear();
}

Bone3D::Bone3D(const std::string& id)
: _name(id)
, _parent(nullptr)
, _worldDirty(true)
{
    
}

Bone3D::~Bone3D()
{
    removeAllChildBone();
}

void Bone3D::updateLocalMat()
{
    if (_blendStates.size())
    {
        Vec3 translate(Vec3::ZERO), scale(Vec3::ZERO);
        Quaternion quat(Quaternion::ZERO);
        
        float total = 0.f;
        for (auto it: _blendStates) {
            total += it.weight;
        }
        if (total)
        {
            if (_blendStates.size() == 1)
            {
                auto& state = _blendStates[0];
                translate = state.localTranslate;
                scale = state.localScale;
                quat = state.localRot;
            }
            else
            {
                float invTotal = 1.f / total;
                for (const auto& it : _blendStates)
                {
                    float weight = (it.weight * invTotal);
                    translate += it.localTranslate * weight;
                    scale.x += it.localScale.x * weight;
                    scale.y += it.localScale.y * weight;
                    scale.z += it.localScale.z * weight;
                    if (!quat.isZero())
                    {
                        Quaternion& q = _blendStates[0].localRot;
                        if (q.x * quat.x + q.y * quat.y + q.z * quat.z + q.w * quat.w < 0)
                            weight = -weight;
                    }
                    quat = Quaternion(it.localRot.x * weight + quat.x, it.localRot.y * weight + quat.y, it.localRot.z * weight + quat.z, it.localRot.w * weight + quat.w);
                }
            }
        }
        
        Mat4::createTranslation(translate, &_local);
        _local.rotate(quat);
        _local.scale(scale);
        
        _blendStates.clear();
    }
}

////////////////////////////////////////////////////////////////////////////////////////////////////////////////

Skeleton3D::Skeleton3D()
: _rootBone(nullptr)
{
    
}

Skeleton3D::~Skeleton3D()
{
    removeAllBones();
}

//create a new meshskin if do not want to share meshskin
Skeleton3D* Skeleton3D::create(const std::string& filename, const std::string& name)
{
    //load skin here;
    std::string fullPath = FileUtils::getInstance()->fullPathForFilename(filename);
    std::string key(fullPath + "#" + name);
    const auto skeletondata = Skeleton3DDataCache::getInstance()->getSkeletonData(key);
    if (skeletondata)
    {
        auto skeleton = new Skeleton3D();
        skeleton->initFromSkeletonData(*skeletondata);
        skeleton->autorelease();
        return skeleton;
    }
    else
    {
        auto instance = Bundle3D::getInstance();
        bool ret = instance->load(fullPath);
        if (ret)
        {
            Skeleton3DData data;
            if (instance->loadSkeletonData(name, &data))
            {
                auto skeleton = new Skeleton3D();
                skeleton->initFromSkeletonData(data);
                skeleton->autorelease();
                Skeleton3DDataCache::getInstance()->addSkeletonData(key, data);
                return skeleton;
            }
        }
    }
    
    return nullptr;
}

bool Skeleton3D::initFromSkeletonData(const Skeleton3DData& skeletondata)
{
    ssize_t i = 0;
    for (; i < skeletondata.boneNames.size(); i++) {
        auto bone = Bone3D::create(skeletondata.boneNames[i]);
        bone->setOriPose(skeletondata.boneOriginMatrices[i]);
        addBone(bone);
    }

    for (auto it : skeletondata.boneChild) {
        auto parent = getBoneByIndex(it.first);
        for (auto childIt : it.second) {
            auto child = getBoneByIndex(childIt);
            child->_parent = parent;
            parent->_children.pushBack(child);
        }
    }
    
    setRootBone(getBoneByIndex(skeletondata.rootBoneIndex));
    if (_rootBone)
        _rootBone->resetPose();
    
    return true;
}

ssize_t Skeleton3D::getBoneCount() const
{
    return _bones.size();
}

//get bone
Bone3D* Skeleton3D::getBoneByIndex(unsigned int index) const
{
    if (index < _bones.size())
        return _bones.at(index);
    
    return nullptr;
}
Bone3D* Skeleton3D::getBoneByName(const std::string& id) const
{
    //search from bones
    for (auto it : _bones) {
        if (it->getName() == id)
            return it;
    }
    
    return nullptr;
}

Bone3D* Skeleton3D::getRootBone() const
{
    return _rootBone;
}
void Skeleton3D::setRootBone(Bone3D* joint)
{
    CC_SAFE_RETAIN(joint);
    CC_SAFE_RELEASE(_rootBone);
    _rootBone = joint;
}

int Skeleton3D::getBoneIndex(Bone3D* bone) const
{
    int i = 0;
    for (; i < _bones.size(); i++) {
        if (_bones.at(i) == bone)
            return i;
    }
    
    return -1;
}

//refresh bone world matrix
void Skeleton3D::updateBoneMatrix()
{
    _rootBone->setWorldMatDirty(true);
    _rootBone->updateWorldMat();
}

void Skeleton3D::removeAllBones()
{
    _bones.clear();
    CC_SAFE_RELEASE(_rootBone);
}

void Skeleton3D::addBone(Bone3D* bone)
{
    _bones.pushBack(bone);
}

////////////////////////////////////////////////////////////////////////
Skeleton3DDataCache* Skeleton3DDataCache::_cacheInstance = nullptr;

Skeleton3DDataCache* Skeleton3DDataCache::getInstance()
{
    if (_cacheInstance == nullptr)
        _cacheInstance = new Skeleton3DDataCache();
    return _cacheInstance;
}
void Skeleton3DDataCache::destroyInstance()
{
    if (_cacheInstance)
    {
        CC_SAFE_DELETE(_cacheInstance);
    }
}

const Skeleton3DData* Skeleton3DDataCache::getSkeletonData(const std::string& key) const
{
    auto it = _skeletonDatas.find(key);
    if (it != _skeletonDatas.end())
        return &it->second;
    
    return nullptr;
}

bool Skeleton3DDataCache::addSkeletonData(const std::string& key, const Skeleton3DData& data)
{
    if (_skeletonDatas.find(key) != _skeletonDatas.end())
        return false; // already have this key
    
    _skeletonDatas[key] = data;
    
    return true;
}

void Skeleton3DDataCache::removeAllSkeletonData()
{
    _skeletonDatas.clear();
}

Skeleton3DDataCache::Skeleton3DDataCache()
{
    
}
Skeleton3DDataCache::~Skeleton3DDataCache()
{
    
}

NS_CC_END