axmol/extensions/CocoStudio/Armature/physics/CCColliderDetector.cpp

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

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


NS_CC_EXT_ARMATURE_BEGIN


#if ENABLE_PHYSICS_BOX2D_DETECT
ColliderBody::ColliderBody(ContourData *contourData)
    : _fixture(NULL)
    , _filter(NULL)
    , _contourData(contourData)
{
    CC_SAFE_RETAIN(_contourData);
}
#elif ENABLE_PHYSICS_CHIPMUNK_DETECT

ColliderBody::ColliderBody(ContourData *contourData)
    : _shape(NULL)
    , _contourData(contourData)
{
    CC_SAFE_RETAIN(_contourData);
}
#endif

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

#if ENABLE_PHYSICS_BOX2D_DETECT
    CC_SAFE_DELETE(_filter);
#endif
}



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

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

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

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

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

    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();
}

void ColliderDetector::addContourDataList(Array *contourDataList)
{
    Object *object = NULL;
    CCARRAY_FOREACH(contourDataList, object)
    {
        addContourData((ContourData *)object);
    }
}

void ColliderDetector::removeContourData(ContourData *contourData)
{
	Object *object = NULL;
	CCARRAY_FOREACH(_colliderBodyList, object)
	{
		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
        {
            Object *object = NULL;
            CCARRAY_FOREACH(_colliderBodyList, object)
            {
                ColliderBody *colliderBody = (ColliderBody *)object;
                b2Fixture *fixture = colliderBody->getB2Fixture();

                b2Filter *filter = colliderBody->getB2Filter();
                *filter = fixture->GetFilterData();

                _body->DestroyFixture(fixture);
                colliderBody->setB2Fixture(NULL);
            }
        }
    }
#elif ENABLE_PHYSICS_CHIPMUNK_DETECT
    if (_body)
    {
        Object *object = NULL;
        if (_active)
        {
            CCARRAY_FOREACH(_colliderBodyList, object)
            {
                ColliderBody *colliderBody = (ColliderBody *)object;
                cpShape *shape = colliderBody->getShape();
                cpSpaceAddShape(_body->space_private, shape);
            }
        }
        else
        {
            CCARRAY_FOREACH(_colliderBodyList, object)
            {
                ColliderBody *colliderBody = (ColliderBody *)object;
                cpShape *shape = colliderBody->getShape();
                cpSpaceRemoveShape(_body->space_private, shape);
            }
        }
    }
#endif
}

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

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


Point helpPoint;

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

    Object *object = NULL;
    CCARRAY_FOREACH(_colliderBodyList, object)
    {
        ColliderBody *colliderBody = (ColliderBody *)object;
        ContourData *contourData = colliderBody->getContourData();

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

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

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


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

#if ENABLE_PHYSICS_CHIPMUNK_DETECT
        cpConvexHull(num, shape->verts, NULL, NULL, 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;

    Object *object = NULL;
    CCARRAY_FOREACH(_colliderBodyList, object)
    {
        ColliderBody *colliderBody = (ColliderBody *)object;

        ContourData *contourData = colliderBody->getContourData();
        const Array *array = &contourData->vertexList;
        Object *object = NULL;

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

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

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

        CC_SAFE_DELETE(b2bv);

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

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

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

        if (colliderBody->getB2Filter() == NULL)
        {
            b2Filter *filter = new b2Filter;
            colliderBody->setB2Filter(filter);
        }
        else
        {
            fixture->SetFilterData(*colliderBody->getB2Filter());
        }
    }
}

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

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

    Object *object = NULL;
    CCARRAY_FOREACH(_colliderBodyList, object)
    {
        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;
        cpSpaceAddShape(_body->space_private, shape);

        colliderBody->setShape(shape);

        delete []verts;
    }
}

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

#endif


NS_CC_EXT_ARMATURE_END