axmol/cocos/editor-support/cocostudio/CCColliderDetector.cpp

/****************************************************************************
Copyright (c) 2013 cocos2d-x.org

http://www.cocos2d-x.org

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of this software and associated documentation files (the "Software"), to deal
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THE SOFTWARE.
****************************************************************************/

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

#if ENABLE_PHYSICS_BOX2D_DETECT
#include "Box2D/Box2D.h"
#elif ENABLE_PHYSICS_CHIPMUNK_DETECT
#include "chipmunk.h"
#endif

using namespace cocos2d;

namespace cocostudio {


#if ENABLE_PHYSICS_BOX2D_DETECT
ColliderFilter::ColliderFilter(unsigned short categoryBits, unsigned short maskBits, signed short 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(uintptr_t collisionType, uintptr_t 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
}
#endif

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

#if ENABLE_PHYSICS_SAVE_CALCULATED_VERTEX
    CC_SAFE_RELEASE(_calculatedVertexList);
#endif
}

void ColliderBody::setColliderFilter(ColliderFilter *filter)
{
    *_filter = *filter;
}
ColliderFilter *ColliderBody::getColliderFilter()
{
    return _filter;
}



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

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

ColliderDetector::ColliderDetector()
    : _colliderBodyList(nullptr)
    , _filter(nullptr)
    , _active(false)
{
    _body = nullptr;
}

ColliderDetector::~ColliderDetector()
{
    _colliderBodyList->removeAllObjects();
    CC_SAFE_DELETE(_colliderBodyList);
    CC_SAFE_DELETE(_filter);
}

bool ColliderDetector::init()
{
    _colliderBodyList = Array::create();
    CCASSERT(_colliderBodyList, "create _colliderBodyList failed!");
    _colliderBodyList->retain();

    _filter = new ColliderFilter();

    return true;
}

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

    return true;
}

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


#if ENABLE_PHYSICS_SAVE_CALCULATED_VERTEX
    CCArray *calculatedVertexList = colliderBody->getCalculatedVertexList();
    
    int num = contourData->vertexList.size();
    for (int i = 0; i < num; i++)
    {
        ContourVertex2 *newVertex = new ContourVertex2(0, 0);
        calculatedVertexList->addObject(newVertex);
        newVertex->release();
    }
#endif
}

void ColliderDetector::addContourDataList(Array *contourDataList)
{
    for(auto object : *contourDataList)
    {
        addContourData((ContourData *)object);
    }
}

void ColliderDetector::removeContourData(ContourData *contourData)
{
	for(auto object : *_colliderBodyList)
	{
		ColliderBody *body = (ColliderBody*)object;
		if (body && body->getContourData() == contourData)
		{
			_colliderBodyList->removeObject(body);
		}
	}
}

void ColliderDetector::removeAll()
{
    _colliderBodyList->removeAllObjects();
}


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;
}

Array *ColliderDetector::getColliderBodyList()
{
    return _colliderBodyList;
}

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;
}


Point helpPoint;

void ColliderDetector::updateTransform(AffineTransform &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

        int num = contourData->vertexList.count();
        ContourVertex2 **vs = (ContourVertex2 **)contourData->vertexList.data->arr;

#if ENABLE_PHYSICS_SAVE_CALCULATED_VERTEX
        ContourVertex2 **cvs = (ContourVertex2 **)colliderBody->getCalculatedVertexList()->data->arr;
#endif

        for (int i = 0; i < num; i++)
        {
            helpPoint.setPoint( vs[i]->x,  vs[i]->y);
            helpPoint = PointApplyAffineTransform(helpPoint, t);


#if ENABLE_PHYSICS_SAVE_CALCULATED_VERTEX
            cvs[i]->x = helpPoint.x;
            cvs[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(num, shape->verts, nullptr, nullptr, 0);
        for (int 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();
        const Array *array = &contourData->vertexList;
        Object *object = nullptr;

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

        int i = 0;
        for(auto object : *array)
        {
            ContourVertex2 *v = (ContourVertex2 *)object;
            b2bv[i].Set(v->x / PT_RATIO, v->y / PT_RATIO);
            i++;
        }

        b2PolygonShape polygon;
        polygon.Set(b2bv, 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();

        int num = contourData->vertexList.count();
        ContourVertex2 **vs = (ContourVertex2 **)contourData->vertexList.data->arr;
        cpVect *verts = new cpVect[num];
        for (int i = 0; i < num; i++)
        {
            verts[num - 1 - i].x = vs[i]->x;
            verts[num - 1 - i].y = vs[i]->y;
        }

        cpShape *shape = cpPolyShapeNew(_body, 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


}