axmol/extensions/cocostudio/CCColliderDetector.cpp

/****************************************************************************
Copyright (c) 2013-2017 Chukong Technologies Inc.

https://axis-project.github.io/

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****************************************************************************/

#include "CCColliderDetector.h"
#include "CCBone.h"
#include "CCTransformHelp.h"

using namespace cocos2d;

namespace cocostudio
{

#if ENABLE_PHYSICS_BOX2D_DETECT
ColliderFilter::ColliderFilter(uint16 categoryBits, uint16 maskBits, int16 groupIndex)
    : _categoryBits(categoryBits), _maskBits(maskBits), _groupIndex(groupIndex)
{}

void ColliderFilter::updateShape(b2Fixture* fixture)
{
    b2Filter filter;
    filter.categoryBits = _categoryBits;
    filter.groupIndex   = _groupIndex;
    filter.maskBits     = _maskBits;

    fixture->SetFilterData(filter);
}

#elif ENABLE_PHYSICS_CHIPMUNK_DETECT
ColliderFilter::ColliderFilter(cpCollisionType collisionType, cpGroup group)
    : _collisionType(collisionType), _group(group)
{}
void ColliderFilter::updateShape(cpShape* shape)
{
    shape->collision_type = _collisionType;
    shape->group          = _group;
}
#endif

#if ENABLE_PHYSICS_BOX2D_DETECT
ColliderBody::ColliderBody(ContourData* contourData) : _fixture(nullptr), _contourData(contourData)
{
    CC_SAFE_RETAIN(_contourData);
    _filter = new ColliderFilter();

#    if ENABLE_PHYSICS_SAVE_CALCULATED_VERTEX
    _calculatedVertexList = Array::create();
    CC_SAFE_RETAIN(_calculatedVertexList);
#    endif
}
#elif ENABLE_PHYSICS_CHIPMUNK_DETECT

ColliderBody::ColliderBody(ContourData* contourData) : _shape(nullptr), _contourData(contourData)
{
    CC_SAFE_RETAIN(_contourData);
    _filter               = new ColliderFilter();

#    if ENABLE_PHYSICS_SAVE_CALCULATED_VERTEX
    _calculatedVertexList = Array::create();
    CC_SAFE_RETAIN(_calculatedVertexList);
#    endif
}
#elif ENABLE_PHYSICS_SAVE_CALCULATED_VERTEX
ColliderBody::ColliderBody(ContourData* contourData) : _contourData(contourData)
{
    CC_SAFE_RETAIN(_contourData);
}
#endif

ColliderBody::~ColliderBody()
{
    CC_SAFE_RELEASE(_contourData);

#if ENABLE_PHYSICS_BOX2D_DETECT || ENABLE_PHYSICS_CHIPMUNK_DETECT
    CC_SAFE_DELETE(_filter);
#endif
}

#if ENABLE_PHYSICS_BOX2D_DETECT || ENABLE_PHYSICS_CHIPMUNK_DETECT
void ColliderBody::setColliderFilter(ColliderFilter* filter)
{
    *_filter = *filter;
}
ColliderFilter* ColliderBody::getColliderFilter()
{
    return _filter;
}
#endif

ColliderDetector* ColliderDetector::create()
{
    ColliderDetector* pColliderDetector = new ColliderDetector();
    if (pColliderDetector->init())
    {
        pColliderDetector->autorelease();
        return pColliderDetector;
    }
    CC_SAFE_DELETE(pColliderDetector);
    return nullptr;
}

ColliderDetector* ColliderDetector::create(Bone* bone)
{
    ColliderDetector* pColliderDetector = new ColliderDetector();
    if (pColliderDetector->init(bone))
    {
        pColliderDetector->autorelease();
        return pColliderDetector;
    }
    CC_SAFE_DELETE(pColliderDetector);
    return nullptr;
}

ColliderDetector::ColliderDetector() : _active(false)
{
#if ENABLE_PHYSICS_BOX2D_DETECT || ENABLE_PHYSICS_CHIPMUNK_DETECT
    _body   = nullptr;
    _filter = nullptr;
#endif
}

ColliderDetector::~ColliderDetector()
{
    _colliderBodyList.clear();

#if ENABLE_PHYSICS_BOX2D_DETECT || ENABLE_PHYSICS_CHIPMUNK_DETECT
    CC_SAFE_DELETE(_filter);
#endif
}

bool ColliderDetector::init()
{
    _colliderBodyList.clear();

#if ENABLE_PHYSICS_BOX2D_DETECT || ENABLE_PHYSICS_CHIPMUNK_DETECT
    _filter = new ColliderFilter();
#endif

    return true;
}

bool ColliderDetector::init(Bone* bone)
{
    init();
    setBone(bone);

    return true;
}

void ColliderDetector::addContourData(ContourData* contourData)
{
    ColliderBody* colliderBody = new ColliderBody(contourData);
    _colliderBodyList.pushBack(colliderBody);
    colliderBody->release();

#if ENABLE_PHYSICS_SAVE_CALCULATED_VERTEX
    std::vector<Vec2>& calculatedVertexList = colliderBody->_calculatedVertexList;

    unsigned long num = contourData->vertexList.size();
    for (unsigned long i = 0; i < num; i++)
    {
        calculatedVertexList.push_back(Vec2());
    }
#endif
}

void ColliderDetector::addContourDataList(cocos2d::Vector<ContourData*>& contourDataList)
{
    for (const auto& contourData : contourDataList)
    {
        this->addContourData(contourData);
    }
}

void ColliderDetector::removeContourData(ContourData* contourData)
{
    std::vector<ColliderBody*> eraseList;

    for (const auto& body : _colliderBodyList)
    {
        if (body && body->getContourData() == contourData)
        {
            eraseList.push_back(body);
        }
    }

    for (const auto& body : eraseList)
    {
        this->_colliderBodyList.eraseObject(body);
    }
}

void ColliderDetector::removeAll()
{
    _colliderBodyList.clear();
}

void ColliderDetector::setActive(bool active)
{
    if (_active == active)
    {
        return;
    }

    _active = active;

#if ENABLE_PHYSICS_BOX2D_DETECT
    if (_body)
    {
        if (active)
        {
            setBody(_body);
        }
        else
        {
            for (auto& object : _colliderBodyList)
            {
                ColliderBody* colliderBody = (ColliderBody*)object;
                b2Fixture* fixture         = colliderBody->getB2Fixture();

                _body->DestroyFixture(fixture);
                colliderBody->setB2Fixture(nullptr);
            }
        }
    }
#elif ENABLE_PHYSICS_CHIPMUNK_DETECT
    if (_body)
    {
        if (_active)
        {
            for (auto& object : _colliderBodyList)
            {
                ColliderBody* colliderBody = (ColliderBody*)object;
                cpShape* shape             = colliderBody->getShape();
                if (shape->space_private == nullptr)
                {
                    cpSpaceAddShape(_body->space_private, shape);
                }
            }
        }
        else
        {
            for (auto& object : _colliderBodyList)
            {
                ColliderBody* colliderBody = (ColliderBody*)object;
                cpShape* shape             = colliderBody->getShape();
                if (shape->space_private != nullptr)
                {
                    cpSpaceRemoveShape(_body->space_private, shape);
                }
            }
        }
    }
#endif
}

bool ColliderDetector::getActive()
{
    return _active;
}

const cocos2d::Vector<ColliderBody*>& ColliderDetector::getColliderBodyList()
{
    return _colliderBodyList;
}

#if ENABLE_PHYSICS_BOX2D_DETECT || ENABLE_PHYSICS_CHIPMUNK_DETECT
void ColliderDetector::setColliderFilter(ColliderFilter* filter)
{
    *_filter = *filter;

    for (auto& object : _colliderBodyList)
    {
        ColliderBody* colliderBody = (ColliderBody*)object;
        colliderBody->setColliderFilter(filter);

#    if ENABLE_PHYSICS_BOX2D_DETECT
        if (colliderBody->getB2Fixture())
        {
            colliderBody->getColliderFilter()->updateShape(colliderBody->getB2Fixture());
        }
#    elif ENABLE_PHYSICS_CHIPMUNK_DETECT
        if (colliderBody->getShape())
        {
            colliderBody->getColliderFilter()->updateShape(colliderBody->getShape());
        }
#    endif
    }
}
ColliderFilter* ColliderDetector::getColliderFilter()
{
    return _filter;
}
#endif

Vec2 helpPoint;

void ColliderDetector::updateTransform(Mat4& t)
{
    if (!_active)
    {
        return;
    }

    for (auto& object : _colliderBodyList)
    {
        ColliderBody* colliderBody = (ColliderBody*)object;
        ContourData* contourData   = colliderBody->getContourData();

#if ENABLE_PHYSICS_BOX2D_DETECT
        b2PolygonShape* shape = nullptr;
        if (_body != nullptr)
        {
            shape = (b2PolygonShape*)colliderBody->getB2Fixture()->GetShape();
        }
#elif ENABLE_PHYSICS_CHIPMUNK_DETECT
        cpPolyShape* shape = nullptr;
        if (_body != nullptr)
        {
            shape = (cpPolyShape*)colliderBody->getShape();
        }
#endif

        unsigned long num              = contourData->vertexList.size();
        std::vector<cocos2d::Vec2>& vs = contourData->vertexList;

#if ENABLE_PHYSICS_SAVE_CALCULATED_VERTEX
        std::vector<cocos2d::Vec2>& cvs = colliderBody->_calculatedVertexList;
#endif

        for (unsigned long i = 0; i < num; i++)
        {
            helpPoint.setPoint(vs.at(i).x, vs.at(i).y);
            helpPoint = PointApplyTransform(helpPoint, t);

#if ENABLE_PHYSICS_SAVE_CALCULATED_VERTEX
            cvs.at(i).x = helpPoint.x;
            cvs.at(i).y = helpPoint.y;
#endif

#if ENABLE_PHYSICS_BOX2D_DETECT
            if (shape != nullptr)
            {
                b2Vec2& bv = shape->m_vertices[i];
                bv.Set(helpPoint.x / PT_RATIO, helpPoint.y / PT_RATIO);
            }
#elif ENABLE_PHYSICS_CHIPMUNK_DETECT
            if (shape != nullptr)
            {
                cpVect v;
                v.x             = helpPoint.x;
                v.y             = helpPoint.y;
                shape->verts[i] = v;
            }
#endif
        }

#if ENABLE_PHYSICS_CHIPMUNK_DETECT
        cpConvexHull((int)num, shape->verts, nullptr, nullptr, 0);
        for (unsigned long i = 0; i < num; i++)
        {
            cpVect b = shape->verts[(i + 1) % shape->numVerts];
            cpVect n = cpvnormalize(cpvperp(cpvsub(b, shape->verts[i])));

            shape->planes[i].n = n;
            shape->planes[i].d = cpvdot(n, shape->verts[i]);
        }
#endif
    }
}

#if ENABLE_PHYSICS_BOX2D_DETECT

void ColliderDetector::setBody(b2Body* pBody)
{
    _body = pBody;

    for (auto& object : _colliderBodyList)
    {
        ColliderBody* colliderBody = (ColliderBody*)object;

        ContourData* contourData = colliderBody->getContourData();

        b2Vec2* b2bv = new b2Vec2[contourData->vertexList.size()];

        int i = 0;
        for (auto& v : contourData->vertexList)
        {
            b2bv[i].Set(v.x / PT_RATIO, v.y / PT_RATIO);
            i++;
        }

        b2PolygonShape polygon;
        polygon.Set(b2bv, (int)contourData->vertexList.size());

        CC_SAFE_DELETE(b2bv);

        b2FixtureDef fixtureDef;
        fixtureDef.shape    = &polygon;
        fixtureDef.isSensor = true;

        b2Fixture* fixture = _body->CreateFixture(&fixtureDef);
        fixture->SetUserData(_bone);

        if (colliderBody->getB2Fixture() != nullptr)
        {
            _body->DestroyFixture(colliderBody->getB2Fixture());
        }
        colliderBody->setB2Fixture(fixture);

        colliderBody->getColliderFilter()->updateShape(fixture);
    }
}

b2Body* ColliderDetector::getBody() const
{
    return _body;
}

#elif ENABLE_PHYSICS_CHIPMUNK_DETECT
void ColliderDetector::setBody(cpBody* pBody)
{
    _body = pBody;

    for (auto& object : _colliderBodyList)
    {
        ColliderBody* colliderBody = (ColliderBody*)object;

        ContourData* contourData = colliderBody->getContourData();

        ssize_t num   = contourData->vertexList.size();
        auto vs       = contourData->vertexList;
        cpVect* verts = new cpVect[num];
        for (int i = 0; i < num; i++)
        {
            verts[num - 1 - i].x = vs.at(i).x;
            verts[num - 1 - i].y = vs.at(i).y;
        }

        cpShape* shape = cpPolyShapeNew(_body, (int)num, verts, cpvzero);

        shape->sensor = true;
        shape->data   = _bone;

        if (_active)
        {
            cpSpaceAddShape(_body->space_private, shape);
        }

        colliderBody->setShape(shape);
        colliderBody->getColliderFilter()->updateShape(shape);

        delete[] verts;
    }
}

cpBody* ColliderDetector::getBody() const
{
    return _body;
}

#endif

}  // namespace cocostudio