axmol/extensions/cocostudio/ActionTimeline/CCSkeletonNode.cpp

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

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#include "ActionTimeline/CCSkeletonNode.h"

#include "base/CCDirector.h"
#include "math/TransformUtils.h"
#include "renderer/CCRenderer.h"
#include "renderer/ccShaders.h"
#include "base/ccUtils.h"
#include <stack>

NS_TIMELINE_BEGIN

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

bool SkeletonNode::init()
{
    _rackLength = _rackWidth = 20;
    updateVertices();

    // init _customCommand
    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");

    auto vertexLayout         = _programState->getVertexLayout();
    const auto& attributeInfo = _programState->getProgram()->getActiveAttributes();
    auto iter                 = attributeInfo.find("a_position");
    if (iter != attributeInfo.end())
    {
        vertexLayout->setAttribute("a_position", iter->second.location, ax::backend::VertexFormat::FLOAT3, 0,
                                   false);
    }
    iter = attributeInfo.find("a_color");
    if (iter != attributeInfo.end())
    {
        vertexLayout->setAttribute("a_color", iter->second.location, ax::backend::VertexFormat::FLOAT4,
                                   3 * sizeof(float), false);
    }
    vertexLayout->setLayout(7 * sizeof(float));

    _customCommand.createVertexBuffer(sizeof(_vertexData[0]), 8, ax::CustomCommand::BufferUsage::DYNAMIC);
    _customCommand.createIndexBuffer(ax::CustomCommand::IndexFormat::U_SHORT, 12,
                                     ax::CustomCommand::BufferUsage::STATIC);
    unsigned short indices[12] = {0, 1, 2, 1, 3, 2, 4, 5, 6, 5, 7, 6};
    _customCommand.updateIndexBuffer(indices, sizeof(indices));

    // init _batchBoneCommand
    _batchBoneCommand.getPipelineDescriptor().programState = _programState;

    _rootSkeleton = this;
    return true;
}

ax::Rect SkeletonNode::getBoundingBox() const
{
    float minx, miny, maxx, maxy = 0;
    minx = miny = maxx        = maxy;
    ax::Rect boundingBox = getVisibleSkinsRect();
    bool first                = true;
    if (!boundingBox.equals(ax::Rect::ZERO))
    {
        minx  = boundingBox.getMinX();
        miny  = boundingBox.getMinY();
        maxx  = boundingBox.getMaxX();
        maxy  = boundingBox.getMaxY();
        first = false;
    }
    auto allbones = getAllSubBones();
    for (const auto& bone : allbones)
    {
        ax::Rect r = RectApplyAffineTransform(bone->getVisibleSkinsRect(),
                                                   bone->getNodeToParentAffineTransform(bone->getRootSkeletonNode()));
        if (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);
        }
    }
    boundingBox.setRect(minx, miny, maxx - minx, maxy - miny);
    return RectApplyAffineTransform(boundingBox, this->getNodeToParentAffineTransform());
}

SkeletonNode::SkeletonNode() : BoneNode(), _subBonesDirty(true), _subBonesOrderDirty(true), _batchedVeticesCount(0) {}

SkeletonNode::~SkeletonNode()
{
    for (auto&& bonepair : _subBonesMap)
    {
        setRootSkeleton(bonepair.second, nullptr);
    }
}

void SkeletonNode::updateVertices()
{
    if (_rackLength != _squareVertices[6].x - _anchorPointInPoints.x ||
        _rackWidth != _squareVertices[3].y - _anchorPointInPoints.y)
    {
        const float radiusl   = _rackLength * .5f;
        const float radiusw   = _rackWidth * .5f;
        const float radiusl_2 = radiusl * .25f;
        const float radiusw_2 = radiusw * .25f;
        _squareVertices[5].y = _squareVertices[2].y = _squareVertices[1].y = _squareVertices[6].y =
            _squareVertices[0].x = _squareVertices[4].x = _squareVertices[7].x = _squareVertices[3].x = .0f;
        _squareVertices[5].x                                                                          = -radiusl;
        _squareVertices[0].y                                                                          = -radiusw;
        _squareVertices[6].x                                                                          = radiusl;
        _squareVertices[3].y                                                                          = radiusw;
        _squareVertices[1].x                                                                          = radiusl_2;
        _squareVertices[7].y                                                                          = radiusw_2;
        _squareVertices[2].x                                                                          = -radiusl_2;
        _squareVertices[4].y                                                                          = -radiusw_2;

        for (int i = 0; i < 8; i++)
        {
            _squareVertices[i] += _anchorPointInPoints;
        }

        _transformUpdated = _transformDirty = _inverseDirty = _contentSizeDirty = true;
    }
}

void SkeletonNode::updateColor()
{
    for (unsigned int i = 0; i < 8; i++)
    {
        _vertexData[i].color = _rackColor;
    }
    _transformUpdated = _transformDirty = _inverseDirty = _contentSizeDirty = true;
}

void SkeletonNode::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);

    int i = 0;
    if (!_children.empty())
    {
        sortAllChildren();
        // draw children zOrder < 0
        for (; i < _children.size(); i++)
        {
            auto node = _children.at(i);

            if (node && node->getLocalZOrder() < 0)
                node->visit(renderer, _modelViewTransform, flags);
            else
                break;
        }

        for (auto it = _children.cbegin() + i; it != _children.cend(); ++it)
            (*it)->visit(renderer, _modelViewTransform, flags);
    }

    checkSubBonesDirty();
    for (const auto& bone : _subOrderedAllBones)
    {
        visitSkins(renderer, bone);
    }

    if (_isRackShow)
    {
        this->draw(renderer, _modelViewTransform, flags);
        // batch draw all sub bones
        _batchBoneCommand.init(_globalZOrder, _blendFunc);
        renderer->addCommand(&_batchBoneCommand);
        batchDrawAllSubBones();
    }
    _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 SkeletonNode::draw(ax::Renderer* renderer, const ax::Mat4& transform, uint32_t flags)
{
    _customCommand.init(_globalZOrder, _blendFunc);
    renderer->addCommand(&_customCommand);
    for (int i = 0; i < 8; ++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].vertex = ax::Vec3(pos.x, pos.y, pos.z) / pos.w;
    }
    _customCommand.updateVertexBuffer(_vertexData, sizeof(_vertexData));

    // custom command and batched draw command share the same program state, so just set one time.
    _programState->setUniform(_mvpLocation, transform.m, sizeof(transform.m));
}

void SkeletonNode::batchDrawAllSubBones()
{
    checkSubBonesDirty();

    _batchedVeticesCount = 0;
    for (const auto& bone : _subOrderedAllBones)
    {
        batchBoneDrawToSkeleton(bone);
    }

    _batchBoneCommand.createVertexBuffer(sizeof(VertexData), _batchedVeticesCount,
                                         ax::CustomCommand::BufferUsage::DYNAMIC);
    _batchBoneCommand.updateVertexBuffer(_batchedBoneVertexData.data(), sizeof(VertexData) * _batchedVeticesCount);

#ifdef AX_STUDIO_ENABLED_VIEW
// TODO
//     glLineWidth(1);
//     glEnable(GL_LINE_SMOOTH);
//     glHint(GL_LINE_SMOOTH_HINT, GL_DONT_CARE);
//     for (int i = 0; i < _batchedVeticesCount; i += 4 )
//     {
//         glDrawArrays(GL_TRIANGLE_FAN, i, 4);
//         glDrawArrays(GL_LINE_LOOP, i, 4);
//     }
//     AX_INCREMENT_GL_DRAWN_BATCHES_AND_VERTICES(1, _batchedVeticesCount);
#else
    unsigned short* indices = (unsigned short*)malloc(sizeof(unsigned short) * _batchedVeticesCount);
    for (int i = 0; i < _batchedVeticesCount; i += 4)
    {
        *indices++ = i;
        *indices++ = i + 1;
        *indices++ = i + 2;

        *indices++ = i;
        *indices++ = i + 2;
        *indices++ = i + 3;
    }
    _batchBoneCommand.createIndexBuffer(ax::CustomCommand::IndexFormat::U_SHORT, _batchedVeticesCount,
                                        ax::CustomCommand::BufferUsage::DYNAMIC);
    _batchBoneCommand.updateIndexBuffer(indices, sizeof(unsigned short) * _batchedVeticesCount);
    free(indices);
#endif  // AX_STUDIO_ENABLED_VIEW
}

void SkeletonNode::changeSkins(const hlookup::string_map<std::string>& boneSkinNameMap)
{
    for (auto&& boneskin : boneSkinNameMap)
    {
        auto bone = getBoneNode(boneskin.first);
        if (nullptr != bone)
            bone->displaySkin(boneskin.second, true);
    }
}

void SkeletonNode::changeSkins(std::string_view skinGroupName)
{
    auto suit = _skinGroupMap.find(skinGroupName);
    if (suit != _skinGroupMap.end())
    {
        changeSkins(suit->second);
    }
}

BoneNode* SkeletonNode::getBoneNode(std::string_view boneName)
{
    auto iter = _subBonesMap.find(boneName);
    if (iter != _subBonesMap.end())
    {
        return iter->second;
    }
    return nullptr;
}

const ax::StringMap<BoneNode*>& SkeletonNode::getAllSubBonesMap() const
{
    return _subBonesMap;
}

void SkeletonNode::addSkinGroup(std::string groupName, hlookup::string_map<std::string> boneSkinNameMap)
{
    _skinGroupMap.emplace(groupName, std::move(boneSkinNameMap));
}

void SkeletonNode::checkSubBonesDirty()
{
    if (_subBonesDirty)
    {
        updateOrderedAllbones();
        _subBonesDirty = false;
    }
    if (_subBonesOrderDirty)
    {
        sortOrderedAllBones();
        _subBonesOrderDirty = false;
    }
}

void SkeletonNode::updateOrderedAllbones()
{
    _subOrderedAllBones.clear();
    // update sub bones, get All Visible SubBones
    // get all sub bones as visit with visible
    std::stack<BoneNode*> boneStack;
    for (const auto& bone : _childBones)
    {
        if (bone->isVisible())
            boneStack.push(bone);
    }

    while (boneStack.size() > 0)
    {
        auto top = boneStack.top();
        _subOrderedAllBones.pushBack(top);
        boneStack.pop();
        auto topChildren = top->getChildBones();
        for (const auto& childbone : topChildren)
        {
            if (childbone->isVisible())
                boneStack.push(childbone);
        }
    }
}

void SkeletonNode::sortOrderedAllBones()
{
    sortNodes(this->_subOrderedAllBones);
}

NS_TIMELINE_END