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axmol/cocos/physics/CCPhysicsWorld.cpp

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/****************************************************************************
Copyright (c) 2013 Chukong Technologies Inc.
http://www.cocos2d-x.org
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
****************************************************************************/
#include "physics/CCPhysicsWorld.h"
#if CC_USE_PHYSICS
#include <climits>
#include "chipmunk.h"
#include "physics/CCPhysicsBody.h"
#include "physics/CCPhysicsShape.h"
#include "CCPhysicsContact.h"
#include "physics/CCPhysicsJoint.h"
#include "CCPhysicsContact.h"
#include "chipmunk/CCPhysicsWorldInfo_chipmunk.h"
#include "chipmunk/CCPhysicsBodyInfo_chipmunk.h"
#include "chipmunk/CCPhysicsShapeInfo_chipmunk.h"
#include "chipmunk/CCPhysicsContactInfo_chipmunk.h"
#include "chipmunk/CCPhysicsJointInfo_chipmunk.h"
#include "chipmunk/CCPhysicsHelper_chipmunk.h"
#include "2d/CCDrawNode.h"
#include "2d/CCScene.h"
#include "base/CCDirector.h"
#include "base/CCEventDispatcher.h"
#include "base/CCEventCustom.h"
#include <algorithm>
NS_CC_BEGIN
const float PHYSICS_INFINITY = INFINITY;
extern const char* PHYSICSCONTACT_EVENT_NAME;
const int PhysicsWorld::DEBUGDRAW_NONE = 0x00;
const int PhysicsWorld::DEBUGDRAW_SHAPE = 0x01;
const int PhysicsWorld::DEBUGDRAW_JOINT = 0x02;
const int PhysicsWorld::DEBUGDRAW_CONTACT = 0x04;
const int PhysicsWorld::DEBUGDRAW_ALL = DEBUGDRAW_SHAPE | DEBUGDRAW_JOINT | DEBUGDRAW_CONTACT;
namespace
{
typedef struct RayCastCallbackInfo
{
PhysicsWorld* world;
PhysicsRayCastCallbackFunc func;
Vec2 p1;
Vec2 p2;
void* data;
}RayCastCallbackInfo;
typedef struct RectQueryCallbackInfo
{
PhysicsWorld* world;
PhysicsQueryRectCallbackFunc func;
void* data;
}RectQueryCallbackInfo;
typedef struct PointQueryCallbackInfo
{
PhysicsWorld* world;
PhysicsQueryPointCallbackFunc func;
void* data;
}PointQueryCallbackInfo;
}
class PhysicsWorldCallback
{
public:
static int collisionBeginCallbackFunc(cpArbiter *arb, struct cpSpace *space, PhysicsWorld *world);
static int collisionPreSolveCallbackFunc(cpArbiter *arb, cpSpace *space, PhysicsWorld *world);
static void collisionPostSolveCallbackFunc(cpArbiter *arb, cpSpace *space, PhysicsWorld *world);
static void collisionSeparateCallbackFunc(cpArbiter *arb, cpSpace *space, PhysicsWorld *world);
static void rayCastCallbackFunc(cpShape *shape, cpFloat t, cpVect n, RayCastCallbackInfo *info);
static void queryRectCallbackFunc(cpShape *shape, RectQueryCallbackInfo *info);
static void queryPointFunc(cpShape *shape, cpFloat distance, cpVect point, PointQueryCallbackInfo *info);
static void getShapesAtPointFunc(cpShape *shape, cpFloat distance, cpVect point, Vector<PhysicsShape*>* arr);
public:
static bool continues;
};
bool PhysicsWorldCallback::continues = true;
int PhysicsWorldCallback::collisionBeginCallbackFunc(cpArbiter *arb, struct cpSpace *space, PhysicsWorld *world)
{
CP_ARBITER_GET_SHAPES(arb, a, b);
auto ita = PhysicsShapeInfo::getMap().find(a);
auto itb = PhysicsShapeInfo::getMap().find(b);
CC_ASSERT(ita != PhysicsShapeInfo::getMap().end() && itb != PhysicsShapeInfo::getMap().end());
PhysicsContact* contact = PhysicsContact::construct(ita->second->getShape(), itb->second->getShape());
arb->data = contact;
contact->_contactInfo = arb;
return world->collisionBeginCallback(*contact);
}
int PhysicsWorldCallback::collisionPreSolveCallbackFunc(cpArbiter *arb, cpSpace *space, PhysicsWorld *world)
{
return world->collisionPreSolveCallback(*static_cast<PhysicsContact*>(arb->data));
}
void PhysicsWorldCallback::collisionPostSolveCallbackFunc(cpArbiter *arb, cpSpace *space, PhysicsWorld *world)
{
world->collisionPostSolveCallback(*static_cast<PhysicsContact*>(arb->data));
}
void PhysicsWorldCallback::collisionSeparateCallbackFunc(cpArbiter *arb, cpSpace *space, PhysicsWorld *world)
{
PhysicsContact* contact = static_cast<PhysicsContact*>(arb->data);
world->collisionSeparateCallback(*contact);
delete contact;
}
void PhysicsWorldCallback::rayCastCallbackFunc(cpShape *shape, cpFloat t, cpVect n, RayCastCallbackInfo *info)
{
if (!PhysicsWorldCallback::continues)
{
return;
}
auto it = PhysicsShapeInfo::getMap().find(shape);
CC_ASSERT(it != PhysicsShapeInfo::getMap().end());
PhysicsRayCastInfo callbackInfo =
{
it->second->getShape(),
info->p1,
info->p2,
Vec2(info->p1.x+(info->p2.x-info->p1.x)*t, info->p1.y+(info->p2.y-info->p1.y)*t),
Vec2(n.x, n.y),
(float)t,
};
PhysicsWorldCallback::continues = info->func(*info->world, callbackInfo, info->data);
}
void PhysicsWorldCallback::queryRectCallbackFunc(cpShape *shape, RectQueryCallbackInfo *info)
{
auto it = PhysicsShapeInfo::getMap().find(shape);
CC_ASSERT(it != PhysicsShapeInfo::getMap().end());
if (!PhysicsWorldCallback::continues)
{
return;
}
PhysicsWorldCallback::continues = info->func(*info->world, *it->second->getShape(), info->data);
}
void PhysicsWorldCallback::getShapesAtPointFunc(cpShape *shape, cpFloat distance, cpVect point, Vector<PhysicsShape*>* arr)
{
auto it = PhysicsShapeInfo::getMap().find(shape);
CC_ASSERT(it != PhysicsShapeInfo::getMap().end());
arr->pushBack(it->second->getShape());
}
void PhysicsWorldCallback::queryPointFunc(cpShape *shape, cpFloat distance, cpVect point, PointQueryCallbackInfo *info)
{
auto it = PhysicsShapeInfo::getMap().find(shape);
CC_ASSERT(it != PhysicsShapeInfo::getMap().end());
PhysicsWorldCallback::continues = info->func(*info->world, *it->second->getShape(), info->data);
}
void PhysicsWorld::debugDraw()
{
if (_debugDraw == nullptr)
{
_debugDraw = new (std::nothrow) PhysicsDebugDraw(*this);
}
if (_debugDraw && !_bodies.empty())
{
if (_debugDraw->begin())
{
if (_debugDrawMask & DEBUGDRAW_SHAPE)
{
for (Ref* obj : _bodies)
{
PhysicsBody* body = dynamic_cast<PhysicsBody*>(obj);
if (!body->isEnabled())
{
continue;
}
for (auto& shape : body->getShapes())
{
_debugDraw->drawShape(*dynamic_cast<PhysicsShape*>(shape));
}
}
}
if (_debugDrawMask & DEBUGDRAW_JOINT)
{
for (auto joint : _joints)
{
_debugDraw->drawJoint(*joint);
}
}
_debugDraw->end();
}
}
}
int PhysicsWorld::collisionBeginCallback(PhysicsContact& contact)
{
bool ret = true;
PhysicsShape* shapeA = contact.getShapeA();
PhysicsShape* shapeB = contact.getShapeB();
PhysicsBody* bodyA = shapeA->getBody();
PhysicsBody* bodyB = shapeB->getBody();
std::vector<PhysicsJoint*> jointsA = bodyA->getJoints();
// check the joint is collision enable or not
for (PhysicsJoint* joint : jointsA)
{
if (std::find(_joints.begin(), _joints.end(), joint) == _joints.end())
{
continue;
}
if (!joint->isCollisionEnabled())
{
PhysicsBody* body = joint->getBodyA() == bodyA ? joint->getBodyB() : joint->getBodyA();
if (body == bodyB)
{
contact.setNotificationEnable(false);
return false;
}
}
}
// bitmask check
if ((shapeA->getCategoryBitmask() & shapeB->getContactTestBitmask()) == 0
|| (shapeA->getContactTestBitmask() & shapeB->getCategoryBitmask()) == 0)
{
contact.setNotificationEnable(false);
}
if (shapeA->getGroup() != 0 && shapeA->getGroup() == shapeB->getGroup())
{
ret = shapeA->getGroup() > 0;
}
else
{
if ((shapeA->getCategoryBitmask() & shapeB->getCollisionBitmask()) == 0
|| (shapeB->getCategoryBitmask() & shapeA->getCollisionBitmask()) == 0)
{
ret = false;
}
}
if (contact.isNotificationEnabled())
{
contact.setEventCode(PhysicsContact::EventCode::BEGIN);
contact.setWorld(this);
_scene->getEventDispatcher()->dispatchEvent(&contact);
}
return ret ? contact.resetResult() : false;
}
int PhysicsWorld::collisionPreSolveCallback(PhysicsContact& contact)
{
if (!contact.isNotificationEnabled())
{
cpArbiterIgnore(static_cast<cpArbiter*>(contact._contactInfo));
return true;
}
contact.setEventCode(PhysicsContact::EventCode::PRESOLVE);
contact.setWorld(this);
_scene->getEventDispatcher()->dispatchEvent(&contact);
return contact.resetResult();
}
void PhysicsWorld::collisionPostSolveCallback(PhysicsContact& contact)
{
if (!contact.isNotificationEnabled())
{
return;
}
contact.setEventCode(PhysicsContact::EventCode::POSTSOLVE);
contact.setWorld(this);
_scene->getEventDispatcher()->dispatchEvent(&contact);
}
void PhysicsWorld::collisionSeparateCallback(PhysicsContact& contact)
{
if (!contact.isNotificationEnabled())
{
return;
}
contact.setEventCode(PhysicsContact::EventCode::SEPERATE);
contact.setWorld(this);
_scene->getEventDispatcher()->dispatchEvent(&contact);
}
void PhysicsWorld::rayCast(PhysicsRayCastCallbackFunc func, const Vec2& point1, const Vec2& point2, void* data)
{
CCASSERT(func != nullptr, "func shouldn't be nullptr");
if (func != nullptr)
{
RayCastCallbackInfo info = { this, func, point1, point2, data };
PhysicsWorldCallback::continues = true;
cpSpaceSegmentQuery(this->_info->getSpace(),
PhysicsHelper::point2cpv(point1),
PhysicsHelper::point2cpv(point2),
CP_ALL_LAYERS,
CP_NO_GROUP,
(cpSpaceSegmentQueryFunc)PhysicsWorldCallback::rayCastCallbackFunc,
&info);
}
}
void PhysicsWorld::queryRect(PhysicsQueryRectCallbackFunc func, const Rect& rect, void* data)
{
CCASSERT(func != nullptr, "func shouldn't be nullptr");
if (func != nullptr)
{
RectQueryCallbackInfo info = {this, func, data};
PhysicsWorldCallback::continues = true;
cpSpaceBBQuery(this->_info->getSpace(),
PhysicsHelper::rect2cpbb(rect),
CP_ALL_LAYERS,
CP_NO_GROUP,
(cpSpaceBBQueryFunc)PhysicsWorldCallback::queryRectCallbackFunc,
&info);
}
}
void PhysicsWorld::queryPoint(PhysicsQueryPointCallbackFunc func, const Vec2& point, void* data)
{
CCASSERT(func != nullptr, "func shouldn't be nullptr");
if (func != nullptr)
{
PointQueryCallbackInfo info = {this, func, data};
PhysicsWorldCallback::continues = true;
cpSpaceNearestPointQuery(this->_info->getSpace(),
PhysicsHelper::point2cpv(point),
0,
CP_ALL_LAYERS,
CP_NO_GROUP,
(cpSpaceNearestPointQueryFunc)PhysicsWorldCallback::queryPointFunc,
&info);
}
}
Vector<PhysicsShape*> PhysicsWorld::getShapes(const Vec2& point) const
{
Vector<PhysicsShape*> arr;
cpSpaceNearestPointQuery(this->_info->getSpace(),
PhysicsHelper::point2cpv(point),
0,
CP_ALL_LAYERS,
CP_NO_GROUP,
(cpSpaceNearestPointQueryFunc)PhysicsWorldCallback::getShapesAtPointFunc,
&arr);
return arr;
}
PhysicsShape* PhysicsWorld::getShape(const Vec2& point) const
{
cpShape* shape = cpSpaceNearestPointQueryNearest(this->_info->getSpace(),
PhysicsHelper::point2cpv(point),
0,
CP_ALL_LAYERS,
CP_NO_GROUP,
nullptr);
return shape == nullptr ? nullptr : PhysicsShapeInfo::getMap().find(shape)->second->getShape();
}
PhysicsWorld* PhysicsWorld::construct(Scene& scene)
{
PhysicsWorld * world = new (std::nothrow) PhysicsWorld();
if(world && world->init(scene))
{
return world;
}
CC_SAFE_DELETE(world);
return nullptr;
}
bool PhysicsWorld::init(Scene& scene)
{
do
{
_info = new (std::nothrow) PhysicsWorldInfo();
CC_BREAK_IF(_info == nullptr);
_scene = &scene;
_info->setGravity(_gravity);
cpSpaceSetDefaultCollisionHandler(_info->getSpace(),
(cpCollisionBeginFunc)PhysicsWorldCallback::collisionBeginCallbackFunc,
(cpCollisionPreSolveFunc)PhysicsWorldCallback::collisionPreSolveCallbackFunc,
(cpCollisionPostSolveFunc)PhysicsWorldCallback::collisionPostSolveCallbackFunc,
(cpCollisionSeparateFunc)PhysicsWorldCallback::collisionSeparateCallbackFunc,
this);
return true;
} while (false);
return false;
}
void PhysicsWorld::addBody(PhysicsBody* body)
{
CCASSERT(body != nullptr, "the body can not be nullptr");
if (body->getWorld() == this)
{
return;
}
if (body->getWorld() != nullptr)
{
body->removeFromWorld();
}
addBodyOrDelay(body);
_bodies.pushBack(body);
body->_world = this;
}
void PhysicsWorld::doAddBody(PhysicsBody* body)
{
if (body->isEnabled())
{
//is gravity enable
if (!body->isGravityEnabled())
{
body->applyForce(-_gravity * body->getMass());
}
// add body to space
if (body->isDynamic())
{
_info->addBody(*body->_info);
}
// add shapes to space
for (auto& shape : body->getShapes())
{
addShape(dynamic_cast<PhysicsShape*>(shape));
}
}
}
void PhysicsWorld::addBodyOrDelay(PhysicsBody* body)
{
auto removeBodyIter = _delayRemoveBodies.find(body);
if (removeBodyIter != _delayRemoveBodies.end())
{
_delayRemoveBodies.erase(removeBodyIter);
return;
}
if (_info->isLocked())
{
if (_delayAddBodies.find(body) == _delayAddBodies.end())
{
_delayAddBodies.pushBack(body);
_delayDirty = true;
}
}
else
{
doAddBody(body);
}
}
void PhysicsWorld::updateBodies()
{
if (_info->isLocked())
{
return;
}
// issue #4944, contact callback will be invoked when add/remove body, _delayAddBodies maybe changed, so we need make a copy.
auto addCopy = _delayAddBodies;
_delayAddBodies.clear();
for (auto& body : addCopy)
{
doAddBody(body);
}
auto removeCopy = _delayRemoveBodies;
_delayRemoveBodies.clear();
for (auto& body : removeCopy)
{
doRemoveBody(body);
}
}
void PhysicsWorld::removeBody(int tag)
{
for (auto& body : _bodies)
{
if (body->getTag() == tag)
{
removeBody(body);
return;
}
}
}
void PhysicsWorld::removeBody(PhysicsBody* body)
{
if (body->getWorld() != this)
{
CCLOG("Physics Warnning: this body doesn't belong to this world");
return;
}
// destory the body's joints
for (auto joint : body->_joints)
{
// set destroy param to false to keep the iterator available
removeJoint(joint, false);
PhysicsBody* other = (joint->getBodyA() == body ? joint->getBodyB() : joint->getBodyA());
other->removeJoint(joint);
// test the distraction is delaied or not
if (std::find(_delayRemoveJoints.rbegin(), _delayRemoveJoints.rend(), joint) != _delayRemoveJoints.rend())
{
joint->_destoryMark = true;
}
else
{
delete joint;
}
}
body->_joints.clear();
removeBodyOrDelay(body);
_bodies.eraseObject(body);
body->_world = nullptr;
}
void PhysicsWorld::removeBodyOrDelay(PhysicsBody* body)
{
if (_delayAddBodies.getIndex(body) != CC_INVALID_INDEX)
{
_delayAddBodies.eraseObject(body);
return;
}
if (_info->isLocked())
{
if (_delayRemoveBodies.getIndex(body) == CC_INVALID_INDEX)
{
_delayRemoveBodies.pushBack(body);
_delayDirty = true;
}
}else
{
doRemoveBody(body);
}
}
void PhysicsWorld::doAddJoint(PhysicsJoint *joint)
{
if (joint == nullptr || joint->_info == nullptr)
{
return;
}
_info->addJoint(*joint->_info);
}
void PhysicsWorld::removeJoint(PhysicsJoint* joint, bool destroy)
{
if (joint->getWorld() != this)
{
if (destroy)
{
CCLOG("physics warnning: the joint is not in this world, it won't be destoried utill the body it conntect is destoried");
}
return;
}
removeJointOrDelay(joint);
_joints.remove(joint);
joint->_world = nullptr;
// clean the connection to this joint
if (destroy)
{
if (joint->getBodyA() != nullptr)
{
joint->getBodyA()->removeJoint(joint);
}
if (joint->getBodyB() != nullptr)
{
joint->getBodyB()->removeJoint(joint);
}
// test the distraction is delaied or not
if (std::find(_delayRemoveJoints.rbegin(), _delayRemoveJoints.rend(), joint) != _delayRemoveJoints.rend())
{
joint->_destoryMark = true;
}
else
{
delete joint;
}
}
}
void PhysicsWorld::updateJoints()
{
if (_info->isLocked())
{
return;
}
auto addCopy = _delayAddJoints;
_delayAddJoints.clear();
for (auto joint : addCopy)
{
doAddJoint(joint);
}
auto removeCopy = _delayRemoveJoints;
_delayRemoveJoints.clear();
for (auto joint : removeCopy)
{
doRemoveJoint(joint);
if (joint->_destoryMark)
{
delete joint;
}
}
}
void PhysicsWorld::removeShape(PhysicsShape* shape)
{
if (shape != nullptr)
{
_info->removeShape(*shape->_info);
}
}
void PhysicsWorld::addJointOrDelay(PhysicsJoint* joint)
{
auto it = std::find(_delayRemoveJoints.begin(), _delayRemoveJoints.end(), joint);
if (it != _delayRemoveJoints.end())
{
_delayRemoveJoints.erase(it);
return;
}
if (_info->isLocked())
{
if (std::find(_delayAddJoints.begin(), _delayAddJoints.end(), joint) == _delayAddJoints.end())
{
_delayAddJoints.push_back(joint);
_delayDirty = true;
}
}else
{
doAddJoint(joint);
}
}
void PhysicsWorld::removeJointOrDelay(PhysicsJoint* joint)
{
auto it = std::find(_delayAddJoints.begin(), _delayAddJoints.end(), joint);
if (it != _delayAddJoints.end())
{
_delayAddJoints.erase(it);
return;
}
if (_info->isLocked())
{
if (std::find(_delayRemoveJoints.rbegin(), _delayRemoveJoints.rend(), joint) == _delayRemoveJoints.rend())
{
_delayRemoveJoints.push_back(joint);
_delayDirty = true;
}
}else
{
doRemoveJoint(joint);
}
}
void PhysicsWorld::addJoint(PhysicsJoint* joint)
{
if (joint->getWorld() != nullptr && joint->getWorld() != this)
{
joint->removeFormWorld();
}
addJointOrDelay(joint);
_joints.push_back(joint);
joint->_world = this;
}
void PhysicsWorld::removeAllJoints(bool destroy)
{
for (auto joint : _joints)
{
removeJointOrDelay(joint);
joint->_world = nullptr;
// clean the connection to this joint
if (destroy)
{
if (joint->getBodyA() != nullptr)
{
joint->getBodyA()->removeJoint(joint);
}
if (joint->getBodyB() != nullptr)
{
joint->getBodyB()->removeJoint(joint);
}
// test the distraction is delaied or not
if (std::find(_delayRemoveJoints.rbegin(), _delayRemoveJoints.rend(), joint) != _delayRemoveJoints.rend())
{
joint->_destoryMark = true;
}
else
{
delete joint;
}
}
}
_joints.clear();
}
void PhysicsWorld::addShape(PhysicsShape* shape)
{
if (shape != nullptr)
{
_info->addShape(*shape->_info);
}
}
void PhysicsWorld::doRemoveBody(PhysicsBody* body)
{
CCASSERT(body != nullptr, "the body can not be nullptr");
// reset the gravity
if (!body->isGravityEnabled())
{
body->applyForce(_gravity * body->getMass());
}
// remove shaps
for (auto& shape : body->getShapes())
{
removeShape(shape);
}
// remove body
_info->removeBody(*body->_info);
}
void PhysicsWorld::doRemoveJoint(PhysicsJoint* joint)
{
_info->removeJoint(*joint->_info);
}
void PhysicsWorld::removeAllBodies()
{
for (auto& child : _bodies)
{
removeBodyOrDelay(child);
child->_world = nullptr;
}
_bodies.clear();
}
void PhysicsWorld::setDebugDrawMask(int mask)
{
if (mask == DEBUGDRAW_NONE)
{
CC_SAFE_DELETE(_debugDraw);
}
_debugDrawMask = mask;
}
const Vector<PhysicsBody*>& PhysicsWorld::getAllBodies() const
{
return _bodies;
}
PhysicsBody* PhysicsWorld::getBody(int tag) const
{
for (auto& body : _bodies)
{
if (body->getTag() == tag)
{
return body;
}
}
return nullptr;
}
void PhysicsWorld::setGravity(const Vect& gravity)
{
if (!_bodies.empty())
{
for (auto& body : _bodies)
{
// reset gravity for body
if (!body->isGravityEnabled())
{
body->applyForce((_gravity - gravity) * body->getMass());
}
}
}
_gravity = gravity;
_info->setGravity(gravity);
}
void PhysicsWorld::step(float delta)
{
if (_autoStep)
{
CCLOG("Physics Warning: You need to close auto step( setAutoStep(false) ) first");
}
else
{
update(delta, true);
}
}
void PhysicsWorld::update(float delta, bool userCall/* = false*/)
{
while (_delayDirty)
{
// the updateJoints must run before the updateBodies.
updateJoints();
updateBodies();
_delayDirty = !(_delayAddBodies.size() == 0 && _delayRemoveBodies.size() == 0 && _delayAddJoints.size() == 0 && _delayRemoveJoints.size() == 0);
}
if (userCall)
{
_info->step(delta);
for (auto& body : _bodies)
{
body->update(delta);
}
}
else
{
_updateTime += delta;
if (++_updateRateCount >= _updateRate)
{
_info->step(_updateTime * _speed);
for (auto& body : _bodies)
{
body->update(_updateTime * _speed);
}
_updateRateCount = 0;
_updateTime = 0.0f;
}
}
if (_debugDrawMask != DEBUGDRAW_NONE)
{
debugDraw();
}
}
PhysicsWorld::PhysicsWorld()
: _gravity(Vec2(0.0f, -98.0f))
, _speed(1.0f)
, _updateRate(1)
, _updateRateCount(0)
, _updateTime(0.0f)
, _info(nullptr)
, _scene(nullptr)
, _delayDirty(false)
, _autoStep(true)
, _debugDraw(nullptr)
, _debugDrawMask(DEBUGDRAW_NONE)
{
}
PhysicsWorld::~PhysicsWorld()
{
removeAllJoints(true);
removeAllBodies();
CC_SAFE_DELETE(_info);
CC_SAFE_DELETE(_debugDraw);
}
PhysicsDebugDraw::PhysicsDebugDraw(PhysicsWorld& world)
: _drawNode(nullptr)
, _world(world)
{
_drawNode = DrawNode::create();
_world.getScene().addChild(_drawNode);
}
PhysicsDebugDraw::~PhysicsDebugDraw()
{
_drawNode->removeFromParent();
_drawNode = nullptr;
}
bool PhysicsDebugDraw::begin()
{
_drawNode->clear();
return true;
}
void PhysicsDebugDraw::end()
{
}
void PhysicsDebugDraw::drawShape(PhysicsShape& shape)
{
const Color4F fillColor(1.0f, 0.0f, 0.0f, 0.3f);
const Color4F outlineColor(1.0f, 0.0f, 0.0f, 1.0f);
for (auto it = shape._info->getShapes().begin(); it != shape._info->getShapes().end(); ++it)
{
cpShape *subShape = *it;
switch ((*it)->klass_private->type)
{
case CP_CIRCLE_SHAPE:
{
float radius = PhysicsHelper::cpfloat2float(cpCircleShapeGetRadius(subShape));
Vec2 centre = PhysicsHelper::cpv2point(cpBodyGetPos(cpShapeGetBody(subShape)))
+ PhysicsHelper::cpv2point(cpCircleShapeGetOffset(subShape));
static const int CIRCLE_SEG_NUM = 12;
Vec2 seg[CIRCLE_SEG_NUM] = {};
for (int i = 0; i < CIRCLE_SEG_NUM; ++i)
{
float angle = (float)i * M_PI / (float)CIRCLE_SEG_NUM * 2.0f;
Vec2 d(radius * cosf(angle), radius * sinf(angle));
seg[i] = centre + d;
}
_drawNode->drawPolygon(seg, CIRCLE_SEG_NUM, fillColor, 1, outlineColor);
break;
}
case CP_SEGMENT_SHAPE:
{
cpSegmentShape *seg = (cpSegmentShape *)subShape;
_drawNode->drawSegment(PhysicsHelper::cpv2point(seg->ta),
PhysicsHelper::cpv2point(seg->tb),
PhysicsHelper::cpfloat2float(seg->r==0 ? 1 : seg->r), outlineColor);
break;
}
case CP_POLY_SHAPE:
{
cpPolyShape* poly = (cpPolyShape*)subShape;
int num = poly->numVerts;
Vec2* seg = new (std::nothrow) Vec2[num];
PhysicsHelper::cpvs2points(poly->tVerts, seg, num);
_drawNode->drawPolygon(seg, num, fillColor, 1.0f, outlineColor);
delete[] seg;
break;
}
default:
break;
}
}
}
void PhysicsDebugDraw::drawJoint(PhysicsJoint& joint)
{
const Color4F lineColor(0.0f, 0.0f, 1.0f, 1.0f);
const Color4F jointPointColor(0.0f, 1.0f, 0.0f, 1.0f);
for (auto it = joint._info->getJoints().begin(); it != joint._info->getJoints().end(); ++it)
{
cpConstraint *constraint = *it;
cpBody *body_a = constraint->a;
cpBody *body_b = constraint->b;
const cpConstraintClass *klass = constraint->klass_private;
if(klass == cpPinJointGetClass())
{
cpPinJoint *subJoint = (cpPinJoint *)constraint;
cpVect a = cpvadd(body_a->p, cpvrotate(subJoint->anchr1, body_a->rot));
cpVect b = cpvadd(body_b->p, cpvrotate(subJoint->anchr2, body_b->rot));
_drawNode->drawSegment(PhysicsHelper::cpv2point(a), PhysicsHelper::cpv2point(b), 1, lineColor);
_drawNode->drawDot(PhysicsHelper::cpv2point(a), 2, jointPointColor);
_drawNode->drawDot(PhysicsHelper::cpv2point(b), 2, jointPointColor);
}
else if(klass == cpSlideJointGetClass())
{
cpSlideJoint *subJoint = (cpSlideJoint *)constraint;
cpVect a = cpvadd(body_a->p, cpvrotate(subJoint->anchr1, body_a->rot));
cpVect b = cpvadd(body_b->p, cpvrotate(subJoint->anchr2, body_b->rot));
_drawNode->drawSegment(PhysicsHelper::cpv2point(a), PhysicsHelper::cpv2point(b), 1, lineColor);
_drawNode->drawDot(PhysicsHelper::cpv2point(a), 2, jointPointColor);
_drawNode->drawDot(PhysicsHelper::cpv2point(b), 2, jointPointColor);
}
else if(klass == cpPivotJointGetClass())
{
cpPivotJoint *subJoint = (cpPivotJoint *)constraint;
cpVect a = cpvadd(body_a->p, cpvrotate(subJoint->anchr1, body_a->rot));
cpVect b = cpvadd(body_b->p, cpvrotate(subJoint->anchr2, body_b->rot));
_drawNode->drawDot(PhysicsHelper::cpv2point(a), 2, jointPointColor);
_drawNode->drawDot(PhysicsHelper::cpv2point(b), 2, jointPointColor);
}
else if(klass == cpGrooveJointGetClass())
{
cpGrooveJoint *subJoint = (cpGrooveJoint *)constraint;
cpVect a = cpvadd(body_a->p, cpvrotate(subJoint->grv_a, body_a->rot));
cpVect b = cpvadd(body_a->p, cpvrotate(subJoint->grv_b, body_a->rot));
cpVect c = cpvadd(body_b->p, cpvrotate(subJoint->anchr2, body_b->rot));
_drawNode->drawSegment(PhysicsHelper::cpv2point(a), PhysicsHelper::cpv2point(b), 1, lineColor);
_drawNode->drawDot(PhysicsHelper::cpv2point(c), 2, jointPointColor);
}
else if(klass == cpDampedSpringGetClass())
{
cpDampedSpring *subJoint = (cpDampedSpring *)constraint;
cpVect a = cpvadd(body_a->p, cpvrotate(subJoint->anchr1, body_a->rot));
cpVect b = cpvadd(body_b->p, cpvrotate(subJoint->anchr2, body_b->rot));
_drawNode->drawSegment(PhysicsHelper::cpv2point(a), PhysicsHelper::cpv2point(b), 1, lineColor);
_drawNode->drawDot(PhysicsHelper::cpv2point(a), 2, jointPointColor);
_drawNode->drawDot(PhysicsHelper::cpv2point(b), 2, jointPointColor);
}
}
}
void PhysicsDebugDraw::drawContact()
{
}
NS_CC_END
#endif // CC_USE_PHYSICS
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