axmol/extensions/cocostudio/ActionTimeline/BoneNode.cpp

/****************************************************************************
Copyright (c) 2015-2017 Chukong Technologies Inc.

https://axmolengine.github.io/

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#include "base/Director.h"
#include "base/Utils.h"
#include "renderer/Renderer.h"
#include "renderer/Shaders.h"
#include "renderer/backend/ProgramState.h"

#include "ActionTimeline/BoneNode.h"
#include "ActionTimeline/SkeletonNode.h"

NS_TIMELINE_BEGIN

BoneNode* BoneNode::create()
{
    BoneNode* ret = new BoneNode();
    if (ret->init())
    {
        ret->autorelease();
        return ret;
    }
    AX_SAFE_DELETE(ret);
    return nullptr;
}

BoneNode* BoneNode::create(int length)
{
    BoneNode* ret = new BoneNode();
    if (ret->init())
    {
        ret->setDebugDrawLength(length);
        ret->autorelease();
    }
    else
    {
        AX_SAFE_DELETE(ret);
    }
    return ret;
}

BoneNode::~BoneNode() {}

bool BoneNode::init()
{
    _rackLength = 50;
    _rackWidth  = 20;
    updateVertices();
    updateColor();

    auto& pipelineDescriptor = _customCommand.getPipelineDescriptor();
    auto* program =
        ax::backend::Program::getBuiltinProgram(ax::backend::ProgramType::POSITION_COLOR);  // TODO: noMVP?
    setProgramState(new ax::backend::ProgramState(program), false);
    pipelineDescriptor.programState = _programState;

    _mvpLocation = _programState->getUniformLocation("u_MVPMatrix"sv);

    _customCommand.createVertexBuffer(sizeof(_vertexData[0]), 4, ax::CustomCommand::BufferUsage::DYNAMIC);
    _customCommand.createIndexBuffer(ax::CustomCommand::IndexFormat::U_SHORT, 6,
                                     ax::CustomCommand::BufferUsage::STATIC);
    unsigned short indices[6] = {0, 1, 2, 0, 2, 3};
    _customCommand.updateIndexBuffer(indices, sizeof(indices));

    return true;
}

void BoneNode::addChild(ax::Node* child, int localZOrder, int tag)
{
    addToChildrenListHelper(child);
    Node::addChild(child, localZOrder, tag);
}

void BoneNode::addChild(Node* child, int localZOrder, std::string_view name)
{
    addToChildrenListHelper(child);
    Node::addChild(child, localZOrder, name);
}

void BoneNode::addSkin(SkinNode* skin, bool isDisplay, bool hideOthers)
{
    AXASSERT(skin != nullptr, "Argument must be non-nil");
    if (hideOthers)
    {
        for (auto&& bonskin : _boneSkins)
        {
            bonskin->setVisible(false);
        }
    }
    Node::addChild(skin);
    skin->setVisible(isDisplay);
}

void BoneNode::addSkin(SkinNode* skin, bool display)
{
    addSkin(skin, display, false);
}

void BoneNode::removeChild(Node* child, bool cleanup /* = true */)
{
    ssize_t index = _children.getIndex(child);
    if (index != ax::AX_INVALID_INDEX)
    {
        removeFromChildrenListHelper(child);
        Node::removeChild(child, cleanup);
    }
}

void BoneNode::removeFromBoneList(BoneNode* bone)
{
    if (_rootSkeleton != nullptr)
    {
        auto skeletonNode = dynamic_cast<SkeletonNode*>(bone);
        if (skeletonNode == nullptr)  // is not a nested skeleton
        {
            auto subBones = bone->getAllSubBones();
            subBones.pushBack(bone);
            for (auto&& subBone : subBones)
            {
                if (subBone->_rootSkeleton == nullptr)
                    continue;
                subBone->_rootSkeleton = nullptr;

                auto toremoveIter = _rootSkeleton->_subBonesMap.find(subBone->getName());
                if (toremoveIter != _rootSkeleton->_subBonesMap.end())
                {
                    _rootSkeleton->_subBonesMap.erase(toremoveIter);
                    _rootSkeleton->_subBonesDirty      = true;
                    _rootSkeleton->_subBonesOrderDirty = true;
                }
            }
        }
        else
        {
            _rootSkeleton->_subBonesDirty      = true;
            _rootSkeleton->_subBonesOrderDirty = true;
        }
    }
    _childBones.eraseObject(bone);
}

void BoneNode::addToBoneList(BoneNode* bone)
{
    _childBones.pushBack(bone);
    if (_rootSkeleton != nullptr)
    {
        auto skeletonNode = dynamic_cast<SkeletonNode*>(bone);
        if (skeletonNode == nullptr && bone->_rootSkeleton == nullptr)  // not nest skeleton
        {
            auto subBones = bone->getAllSubBones();
            subBones.pushBack(bone);
            for (auto&& subBone : subBones)
            {
                subBone->_rootSkeleton = _rootSkeleton;
                auto bonename          = subBone->getName();
                if (_rootSkeleton->_subBonesMap.find(bonename) == _rootSkeleton->_subBonesMap.end())
                {
                    _rootSkeleton->_subBonesMap.insert(subBone->getName(), subBone);

                    _rootSkeleton->_subBonesDirty      = true;
                    _rootSkeleton->_subBonesOrderDirty = true;
                }
                else
                    AXLOG("already has a bone named %s in skeleton %s", bonename.data(),
                          _rootSkeleton->getName().data());
            }
        }
        else
        {
            _rootSkeleton->_subBonesDirty      = true;
            _rootSkeleton->_subBonesOrderDirty = true;
        }
    }
}

void BoneNode::addToSkinList(SkinNode* skin)
{
    _boneSkins.pushBack(skin);
    auto blendSkin = dynamic_cast<BlendProtocol*>(skin);
    if (nullptr != blendSkin && _blendFunc != blendSkin->getBlendFunc())
    {
        blendSkin->setBlendFunc(_blendFunc);
    }
}

void BoneNode::removeFromSkinList(SkinNode* skin)
{
    _boneSkins.eraseObject(skin);
}

void BoneNode::displaySkin(SkinNode* skin, bool hideOthers)
{
    for (auto&& boneskin : _boneSkins)
    {
        if (boneskin == skin)
        {
            boneskin->setVisible(true);
        }
        else if (hideOthers)
        {
            boneskin->setVisible(false);
        }
    }
}

void BoneNode::displaySkin(std::string_view skinName, bool hideOthers)
{
    for (auto&& skin : _boneSkins)
    {
        if (skinName == skin->getName())
        {
            skin->setVisible(true);
        }
        else if (hideOthers)
        {
            skin->setVisible(false);
        }
    }
}

ax::Vector<SkinNode*> BoneNode::getVisibleSkins() const
{
    ax::Vector<SkinNode*> displayingSkins;
    for (const auto& boneskin : _boneSkins)
    {
        if (boneskin->isVisible())
        {
            displayingSkins.pushBack(boneskin);
        }
    }
    return displayingSkins;
}

ax::Rect BoneNode::getBoundingBox() const
{
    ax::Rect boundingBox = getVisibleSkinsRect();
    return RectApplyAffineTransform(boundingBox, this->getNodeToParentAffineTransform());
}

ax::Rect BoneNode::getVisibleSkinsRect() const
{
    float minx, miny, maxx, maxy = 0;
    minx = miny = maxx = maxy;
    bool first         = true;

    ax::Rect displayRect = ax::Rect(0, 0, 0, 0);
    if (_isRackShow && _rootSkeleton != nullptr && _rootSkeleton->_isRackShow)
    {
        maxx  = _rackLength;
        maxy  = _rackWidth;
        first = false;
    }

    for (const auto& skin : _boneSkins)
    {
        ax::Rect r = skin->getBoundingBox();
        if (!skin->isVisible() || r.equals(ax::Rect::ZERO))
            continue;

        if (first)
        {
            minx = r.getMinX();
            miny = r.getMinY();
            maxx = r.getMaxX();
            maxy = r.getMaxY();

            first = false;
        }
        else
        {
            minx = MIN(r.getMinX(), minx);
            miny = MIN(r.getMinY(), miny);
            maxx = MAX(r.getMaxX(), maxx);
            maxy = MAX(r.getMaxY(), maxy);
        }
        displayRect.setRect(minx, miny, maxx - minx, maxy - miny);
    }
    return displayRect;
}

void BoneNode::setBlendFunc(const ax::BlendFunc& blendFunc)
{
    if (_blendFunc != blendFunc)
    {
        _blendFunc = blendFunc;
        for (auto&& skin : _boneSkins)
        {
            auto blendSkin = dynamic_cast<BlendProtocol*>(skin);
            if (nullptr != blendSkin)
            {
                blendSkin->setBlendFunc(_blendFunc);
            }
        }
    }
}

void BoneNode::setDebugDrawLength(float length)
{
    _rackLength = length;
    updateVertices();
}

void BoneNode::setDebugDrawWidth(float width)
{
    _rackWidth = width;
    updateVertices();
}

void BoneNode::setDebugDrawEnabled(bool isDebugDraw)
{
    if (_isRackShow == isDebugDraw)
        return;
    _isRackShow = isDebugDraw;
}

void BoneNode::setDebugDrawColor(const ax::Color4F& color)
{
    _rackColor = color;
    updateColor();
}

void BoneNode::visit(ax::Renderer* renderer, const ax::Mat4& parentTransform, uint32_t parentFlags)
{
    // quick return if not visible. children won't be drawn.
    if (!_visible)
    {
        return;
    }

    uint32_t flags = processParentFlags(parentTransform, parentFlags);

    // IMPORTANT:
    // To ease the migration to v3.0, we still support the Mat4 stack,
    // but it is deprecated and your code should not rely on it
    _director->pushMatrix(ax::MATRIX_STACK_TYPE::MATRIX_STACK_MODELVIEW);
    _director->loadMatrix(ax::MATRIX_STACK_TYPE::MATRIX_STACK_MODELVIEW, _modelViewTransform);

    bool visibleByCamera = isVisitableByVisitingCamera();
    bool isdebugdraw     = visibleByCamera && _isRackShow && nullptr == _rootSkeleton;
    int i                = 0;

    if (!_children.empty())
    {
        sortAllChildren();
        // draw children zOrder < 0
        for (; i < _children.size(); i++)
        {
            auto node = _children.at(i);
            if (_rootSkeleton != nullptr && _boneSkins.contains(node))  // skip skin when bone is in a skeleton
                continue;
            if (node && node->getLocalZOrder() < 0)
                node->visit(renderer, _modelViewTransform, flags);
            else
                break;
        }
        // self draw
        if (isdebugdraw)
            this->draw(renderer, _modelViewTransform, flags);

        for (auto it = _children.cbegin() + i; it != _children.cend(); ++it)
        {
            auto node = (*it);
            if (_rootSkeleton != nullptr && _boneSkins.contains(node))  // skip skin when bone is in a skeleton
                continue;
            node->visit(renderer, _modelViewTransform, flags);
        }
    }
    else if (isdebugdraw)
    {
        this->draw(renderer, _modelViewTransform, flags);
    }

    _director->popMatrix(ax::MATRIX_STACK_TYPE::MATRIX_STACK_MODELVIEW);

    // FIX ME: Why need to set _orderOfArrival to 0??
    // Please refer to https://github.com/cocos2d/cocos2d-x/pull/6920
    // reset for next frame
    // _orderOfArrival = 0;
}

void BoneNode::draw(ax::Renderer* renderer, const ax::Mat4& transform, uint32_t flags)
{
    _customCommand.init(_globalZOrder, _blendFunc);
    renderer->addCommand(&_customCommand);

#ifdef AX_STUDIO_ENABLED_VIEW
// TODO
//     glVertexAttribPointer(ax::GLProgram::VERTEX_ATTRIB_POSITION, 3, GL_FLOAT, GL_FALSE, 0, _noMVPVertices);
//     glVertexAttribPointer(ax::GLProgram::VERTEX_ATTRIB_COLOR, 4, GL_FLOAT, GL_FALSE, 0, _squareColors);
//
//     glEnable(GL_LINE_SMOOTH);
//     glHint(GL_LINE_SMOOTH_HINT, GL_DONT_CARE);
//     glDrawArrays(GL_LINE_LOOP, 0, 4);
//     AX_INCREMENT_GL_DRAWN_BATCHES_AND_VERTICES(1, 8);
#endif  // AX_STUDIO_ENABLED_VIEW

    for (int i = 0; i < 4; ++i)
    {
        ax::Vec4 pos;
        pos.x = _squareVertices[i].x;
        pos.y = _squareVertices[i].y;
        pos.z = _positionZ;
        pos.w = 1;
        _modelViewTransform.transformVector(&pos);
        _vertexData[i].noMVPVertices = ax::Vec3(pos.x, pos.y, pos.z) / pos.w;
    }
    _customCommand.updateVertexBuffer(_vertexData, sizeof(_vertexData));

    _programState->setUniform(_mvpLocation, transform.m, sizeof(transform.m));
}

void BoneNode::updateVertices()
{
    if (_rackLength != _squareVertices[2].x - _anchorPointInPoints.x ||
        _squareVertices[3].y != _rackWidth / 2 - _anchorPointInPoints.y)
    {
        _squareVertices[1].x = _squareVertices[1].y = _squareVertices[3].y = .0f;
        _squareVertices[0].x = _squareVertices[2].x = _rackLength * .1f;
        _squareVertices[2].y                        = _rackWidth * .5f;
        _squareVertices[0].y                        = -_squareVertices[2].y;
        _squareVertices[3].x                        = _rackLength;

        for (int i = 0; i < 4; i++)
        {
            _squareVertices[i] += _anchorPointInPoints;
        }
        _transformUpdated = _transformDirty = _inverseDirty = _contentSizeDirty = true;
    }
}

void BoneNode::updateColor()
{
    for (unsigned int i = 0; i < 4; i++)
    {
        _vertexData[i].squareColor = _rackColor;
    }
    _transformUpdated = _transformDirty = _inverseDirty = _contentSizeDirty = true;
}

void BoneNode::updateDisplayedColor(const ax::Color3B& /*parentColor*/)
{
    if (_cascadeColorEnabled)
    {
        for (const auto& child : _boneSkins)
        {
            child->updateDisplayedColor(_displayedColor);
        }
    }
}

void BoneNode::updateDisplayedOpacity(uint8_t /*parentOpacity*/)
{
    if (_cascadeOpacityEnabled)
    {
        for (const auto& child : _boneSkins)
        {
            child->updateDisplayedOpacity(_displayedOpacity);
        }
    }
}

void BoneNode::disableCascadeOpacity()
{
    for (const auto& child : _boneSkins)
    {
        child->updateDisplayedOpacity(255);
    }
}

void BoneNode::disableCascadeColor()
{
    for (const auto& child : _boneSkins)
    {
        child->updateDisplayedColor(ax::Color3B::WHITE);
    }
}

ax::Vector<BoneNode*> BoneNode::getAllSubBones() const
{
    ax::Vector<BoneNode*> allBones;
    std::stack<BoneNode*> boneStack;  // for avoid recursive
    for (const auto& bone : _childBones)
    {
        boneStack.push(bone);
    }

    while (boneStack.size() > 0)
    {
        auto top = boneStack.top();
        allBones.pushBack(top);
        boneStack.pop();
        auto topchildren = top->getChildBones();
        for (const auto& childbone : topchildren)
        {
            boneStack.push(childbone);
        }
    }
    return allBones;
}

ax::Vector<SkinNode*> BoneNode::getAllSubSkins() const
{
    auto allbones = getAllSubBones();
    ax::Vector<SkinNode*> allskins;
    for (const auto& bone : allbones)
    {
        for (const auto& skin : bone->getSkins())
        {
            allskins.pushBack(skin);
        }
    }
    return allskins;
}

void BoneNode::sortAllChildren()
{
    if (_reorderChildDirty)
    {
        sortNodes(_childBones);
        sortNodes(_boneSkins);
        Node::sortAllChildren();
    }
}

SkeletonNode* BoneNode::getRootSkeletonNode() const
{
    return _rootSkeleton;
}

#ifdef AX_STUDIO_ENABLED_VIEW
bool BoneNode::isPointOnRack(const ax::Vec2& bonePoint)
{

    if (bonePoint.x >= 0.0f && bonePoint.y >= _squareVertices[0].y && bonePoint.x <= _rackLength &&
        bonePoint.y <= _squareVertices[2].y)
    {
        if (_rackLength != 0.0f && _rackWidth != 0.0f)
        {
            float a1 = (_squareVertices[2].y - _squareVertices[3].y) / (_squareVertices[3].x - _squareVertices[0].x);
            float a2 = (_squareVertices[2].y - _squareVertices[3].y) / (_squareVertices[0].x - _squareVertices[1].x);
            float b1 = a1 * _squareVertices[3].x;
            float y1 = bonePoint.y - _squareVertices[1].y;
            if (y1 >= a1 * bonePoint.x - b1 && y1 <= a2 * bonePoint.x && y1 >= -a2 * bonePoint.x &&
                y1 <= -a1 * bonePoint.x + b1)
                return true;
        }
    }
    return false;
}
#endif  // AX_STUDIO_ENABLED_VIEW

void BoneNode::batchBoneDrawToSkeleton(BoneNode* bone) const
{
    bool visibleByCamera = bone->isVisitableByVisitingCamera();
    if (!visibleByCamera)
    {
        return;
    }

    ax::Vec3 vpos[4];
    for (int i = 0; i < 4; i++)
    {
        ax::Vec4 pos;
        pos.x = bone->_squareVertices[i].x;
        pos.y = bone->_squareVertices[i].y;
        pos.z = bone->_positionZ;
        pos.w = 1;
        bone->_modelViewTransform.transformVector(&pos);  // call after visit
        vpos[i] = ax::Vec3(pos.x, pos.y, pos.z) / pos.w;
    }

    int count = bone->_rootSkeleton->_batchedVeticesCount;
    if (count + 8 > (int)(bone->_rootSkeleton->_batchedBoneVertexData.size()))
    {
        bone->_rootSkeleton->_batchedBoneVertexData.resize(count + 100);
    }
    for (int i = 0; i < 4; i++)
    {
        bone->_rootSkeleton->_batchedBoneVertexData[count + i].vertex = vpos[i];
        bone->_rootSkeleton->_batchedBoneVertexData[count + i].color  = bone->_vertexData[i].squareColor;
    }
    bone->_rootSkeleton->_batchedVeticesCount += 4;
}

// call after self visit
void BoneNode::visitSkins(ax::Renderer* renderer, BoneNode* bone) const
{
    // quick return if not visible. children won't be drawn.
    if (!bone->_visible)
    {
        return;
    }

    // IMPORTANT:
    // To ease the migration to v3.0, we still support the Mat4 stack,
    // but it is deprecated and your code should not rely on it
    _director->pushMatrix(ax::MATRIX_STACK_TYPE::MATRIX_STACK_MODELVIEW);
    _director->loadMatrix(ax::MATRIX_STACK_TYPE::MATRIX_STACK_MODELVIEW, bone->_modelViewTransform);

    if (!bone->_boneSkins.empty())
    {
        bone->sortAllChildren();
        for (auto it = bone->_boneSkins.cbegin(); it != bone->_boneSkins.cend(); ++it)
            (*it)->visit(renderer, bone->_modelViewTransform, true);
    }

    _director->popMatrix(ax::MATRIX_STACK_TYPE::MATRIX_STACK_MODELVIEW);

    // FIX ME: Why need to set _orderOfArrival to 0??
    // Please refer to https://github.com/cocos2d/cocos2d-x/pull/6920
    // reset for next frame
    // _orderOfArrival = 0;
}

void BoneNode::setRootSkeleton(BoneNode* bone, SkeletonNode* skeleton) const
{
    bone->_rootSkeleton = skeleton;
}

void BoneNode::setLocalZOrder(int localZOrder)
{
    Node::setLocalZOrder(localZOrder);
    if (_rootSkeleton != nullptr)
        _rootSkeleton->_subBonesOrderDirty = true;
}

void BoneNode::setName(std::string_view name)
{
    auto oldname = getName();
    Node::setName(name);
    if (_rootSkeleton != nullptr)
    {
        auto oiter = _rootSkeleton->_subBonesMap.find(oldname);
        auto niter = _rootSkeleton->_subBonesMap.find(name);
        if (oiter != _rootSkeleton->_subBonesMap.end() && niter == _rootSkeleton->_subBonesMap.end())
        {
            auto node = oiter->second;
            _rootSkeleton->_subBonesMap.erase(oiter);
            _rootSkeleton->_subBonesMap.insert(name, node);
        }
    }
}

void BoneNode::addToChildrenListHelper(Node* child)
{
    BoneNode* bone = dynamic_cast<BoneNode*>(child);
    if (nullptr != bone)
    {
        addToBoneList(bone);
    }
    else
    {
        SkinNode* skin = dynamic_cast<SkinNode*>(child);
        if (nullptr != skin)
        {
            addToSkinList(skin);
        }
    }
}

void BoneNode::removeFromChildrenListHelper(Node* child)
{
    BoneNode* bone = dynamic_cast<BoneNode*>(child);
    if (nullptr != bone)
    {
        removeFromBoneList(bone);
    }
    else
    {
        SkinNode* skin = dynamic_cast<SkinNode*>(child);
        if (nullptr != skin)
        {
            removeFromSkinList(skin);
        }
    }
}

void BoneNode::setVisible(bool visible)
{
    if (_visible == visible)
        return;

    Node::setVisible(visible);
    if (_rootSkeleton != nullptr)
    {
        _rootSkeleton->_subBonesDirty      = true;
        _rootSkeleton->_subBonesOrderDirty = true;
    }
}

void BoneNode::setContentSize(const ax::Size& contentSize)
{
    Node::setContentSize(contentSize);
    updateVertices();
}

void BoneNode::setAnchorPoint(const ax::Vec2& anchorPoint)
{
    Node::setAnchorPoint(anchorPoint);
    updateVertices();
}

NS_TIMELINE_END