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Cocos2dx Error at this line: arrowBody->setDynamic(false);

Emirhan YÄ±lmaz

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Problem Description
I check collision and if the sprite body collided each other I run this line: arrowBody->setDynamic(false); but I have a error:

Aborting due to Chipmunk error: This operation cannot be done safely during a call to cpSpaceStep() or during a query. Put these calls into a post-step callback.

Failed condition: !space->locked

Source:/Users/riq/progs/cocos2d-x-3rd-party-libs-src/contrib/ios-x86_64/chipmunk/src/cpBody.c:174

How can I fix it ? Please Help Me!

Sonar Systems admin

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What version of Cocos2d-x are you using?

Emirhan YÄ±lmaz

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I’m using 3.17

Emirhan YÄ±lmaz

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\(#include "MainScene.h" #include "MyBodyParser.h" #include "SimpleAudioEngine.h" USING_NS_CC; Scene* MainScene::createScene() { auto scene = Scene::createWithPhysics(); scene->getPhysicsWorld()->setDebugDrawMask(PhysicsWorld::DEBUGDRAW_NONE); auto layer = MainScene::create(); layer->setPhysicsWorld(scene->getPhysicsWorld()); scene->addChild(layer); return scene; } bool MainScene::init() { if ( !Scene::init() ) { return false; } LayerColor *_bgColor = LayerColor::create(Color4B(0, 191, 255,230)); this->addChild(_bgColor, -10); auto visibleSize = Director::getInstance()->getVisibleSize(); Vec2 origin = Director::getInstance()->getVisibleOrigin(); auto listener = EventListenerTouchOneByOne::create(); listener->onTouchBegan = CC_CALLBACK_2(MainScene::onTouchBegan, this); _eventDispatcher->addEventListenerWithSceneGraphPriority(listener, this); auto contactListener = EventListenerPhysicsContact::create(); contactListener->onContactBegin = CC_CALLBACK_1(MainScene::onContactBegin, this); this->getEventDispatcher()->addEventListenerWithSceneGraphPriority(contactListener, this); auto edgeNode = Node::create(); edgeNode->setPosition(Vec2(origin.x + visibleSize.width / 2, origin.y + visibleSize.height / 2)); auto edgeBody = PhysicsBody::createEdgeBox(visibleSize, PHYSICSBODY_MATERIAL_DEFAULT, 3); edgeNode->setPhysicsBody(edgeBody); this->addChild(edgeNode); auto circle = Sprite::create("circle.png"); circle->setPosition(Vec2(origin.x + visibleSize.width / 2, origin.y + visibleSize.height - 80)); circle->runAction(RepeatForever::create(RotateBy::create(3.0f, 360))); MyBodyParser::getInstance()->parseJsonFile("circle.json"); auto circleBody = MyBodyParser::getInstance()->bodyFormJson(circle, "circle", PhysicsMaterial(0, 0, 1)); if(circleBody != nullptr) { circleBody->setDynamic(false); circle->setPhysicsBody(circleBody); } //this->addChild(circle); auto apple = Sprite::create("apple.png"); apple->setPosition(Vec2(origin.x + visibleSize.width / 2, origin.y + visibleSize.height - 80)); auto appleBody = PhysicsBody::createCircle(apple->getContentSize().width / 2, PhysicsMaterial(0, 0, 0)); appleBody->setCollisionBitmask(1); appleBody->setContactTestBitmask(true); appleBody->setDynamic(false); apple->setPhysicsBody(appleBody); this->addChild(apple); auto cloud1 = Sprite::create("cloud.png"); cloud1->setPosition(Vec2(origin.x + 25, origin.y + visibleSize.height / 2)); this->addChild(cloud1); auto cloud2 = Sprite::create("cloud.png"); cloud2->setPosition(Vec2(origin.x + 145, origin.y + 300)); this->addChild(cloud2); arrow = Sprite::create("arrow.png"); arrow->setPosition(Vec2(origin.x + visibleSize.width / 2, origin.y + visibleSize.height / 6)); arrowBody = PhysicsBody::createBox(arrow->getContentSize(), PhysicsMaterial(0, 0, 0)); arrowBody->setCollisionBitmask(2); arrowBody->setContactTestBitmask(true); arrowBody->setDynamic(false); arrow->setPhysicsBody(arrowBody); this->addChild(arrow); return true; } bool MainScene::onTouchBegan(cocos2d::Touch *touch, cocos2d::Event *event) { action = MoveBy::create(1.0f, Vec2(0, 200)); arrowBody->setDynamic(true); arrow->runAction(action); return true; } bool MainScene::onContactBegin(cocos2d::PhysicsContact &contact) { PhysicsBody *a = contact.getShapeA()->getBody(); PhysicsBody *b = contact.getShapeB()->getBody(); if ( (1 == a->getCollisionBitmask() && 2 == b->getCollisionBitmask() ) || ( 2 == a->getCollisionBitmask() && 1 == b->getCollisionBitmask() ) ) { arrowBody->setDynamic(false); } return true; } \)What is meant by local scope? I did not fully understand. Can you explain via code file please. This is my full .cpp file:

#include "MainScene.h"
#include "MyBodyParser.h"
#include "SimpleAudioEngine.h"

USING_NS_CC;

Scene* MainScene::createScene()
{
    auto scene = Scene::createWithPhysics();
    scene->getPhysicsWorld()->setDebugDrawMask(PhysicsWorld::DEBUGDRAW_NONE);
    
    auto layer = MainScene::create();
    layer->setPhysicsWorld(scene->getPhysicsWorld());
    
    scene->addChild(layer);
    
    return scene;
}

bool MainScene::init()
{
    if ( !Scene::init() )
    {
        return false;
    }
    
    LayerColor *_bgColor = LayerColor::create(Color4B(0, 191, 255,230));
    this->addChild(_bgColor, -10);
    
    auto visibleSize = Director::getInstance()->getVisibleSize();
    Vec2 origin = Director::getInstance()->getVisibleOrigin();
    
    auto listener = EventListenerTouchOneByOne::create();
    listener->onTouchBegan = CC_CALLBACK_2(MainScene::onTouchBegan, this);
    _eventDispatcher->addEventListenerWithSceneGraphPriority(listener, this);
    
    auto contactListener = EventListenerPhysicsContact::create();
    contactListener->onContactBegin = CC_CALLBACK_1(MainScene::onContactBegin, this);
    this->getEventDispatcher()->addEventListenerWithSceneGraphPriority(contactListener, this);
    
    auto edgeNode = Node::create();
    edgeNode->setPosition(Vec2(origin.x + visibleSize.width / 2, origin.y + visibleSize.height / 2));
    
    auto edgeBody = PhysicsBody::createEdgeBox(visibleSize, PHYSICSBODY_MATERIAL_DEFAULT, 3);
    
    edgeNode->setPhysicsBody(edgeBody);
    
    this->addChild(edgeNode);
    
    auto circle = Sprite::create("circle.png");
    circle->setPosition(Vec2(origin.x + visibleSize.width / 2, origin.y + visibleSize.height - 80));
    circle->runAction(RepeatForever::create(RotateBy::create(3.0f, 360)));
    
    MyBodyParser::getInstance()->parseJsonFile("circle.json");
    
    auto circleBody = MyBodyParser::getInstance()->bodyFormJson(circle, "circle", PhysicsMaterial(0, 0, 1));
    
    if(circleBody != nullptr) {
        circleBody->setDynamic(false);
        circle->setPhysicsBody(circleBody);
    }
    
    //this->addChild(circle);
    
    auto apple = Sprite::create("apple.png");
    apple->setPosition(Vec2(origin.x + visibleSize.width / 2, origin.y + visibleSize.height - 80));
    
    auto appleBody = PhysicsBody::createCircle(apple->getContentSize().width / 2, PhysicsMaterial(0, 0, 0));
    appleBody->setCollisionBitmask(1);
    appleBody->setContactTestBitmask(true);
    
    appleBody->setDynamic(false);
    apple->setPhysicsBody(appleBody);
        
    this->addChild(apple);
    
    auto cloud1 = Sprite::create("cloud.png");
    cloud1->setPosition(Vec2(origin.x + 25, origin.y + visibleSize.height / 2));
        
    this->addChild(cloud1);
        
    auto cloud2 = Sprite::create("cloud.png");
    cloud2->setPosition(Vec2(origin.x + 145, origin.y + 300));
        
    this->addChild(cloud2);
    
    arrow = Sprite::create("arrow.png");
    arrow->setPosition(Vec2(origin.x + visibleSize.width / 2, origin.y + visibleSize.height / 6));
    
    arrowBody = PhysicsBody::createBox(arrow->getContentSize(), PhysicsMaterial(0, 0, 0));
    arrowBody->setCollisionBitmask(2);
    arrowBody->setContactTestBitmask(true);
    arrowBody->setDynamic(false);
    arrow->setPhysicsBody(arrowBody);
    
    this->addChild(arrow);
    
    return true;
}

bool MainScene::onTouchBegan(cocos2d::Touch *touch, cocos2d::Event *event) {
    action = MoveBy::create(1.0f, Vec2(0, 200));
    arrowBody->setDynamic(true);
    arrow->runAction(action);
    
    return true;
}

bool MainScene::onContactBegin(cocos2d::PhysicsContact &contact) {
    PhysicsBody *a = contact.getShapeA()->getBody();
    PhysicsBody *b = contact.getShapeB()->getBody();
    
    if ( (1 == a->getCollisionBitmask() && 2 == b->getCollisionBitmask() ) || ( 2 == a->getCollisionBitmask() && 1 == b->getCollisionBitmask() ) ) {
        arrowBody->setDynamic(false);
    }
    
    return true;
}

And my Header file:

#ifndef __MAIN_SCENE_H__
#define __MAIN_SCENE_H__

#include "cocos2d.h"
#include "MyBodyParser.h"

class MainScene : public cocos2d::Scene
{
public:
    static cocos2d::Scene* createScene();
    
    virtual bool init();
    
    CREATE_FUNC(MainScene);
    
    bool onTouchBegan(cocos2d::Touch *touch, cocos2d::Event *event);
    
    cocos2d::Sprite *arrow;
    cocos2d::MoveBy *action;
    cocos2d::PhysicsBody *arrowBody;
    
    cocos2d::PhysicsWorld *physicsWorld;
    
    void setPhysicsWorld(cocos2d::PhysicsWorld *world) {physicsWorld = world;};
    
    bool onContactBegin(cocos2d::PhysicsContact &contact);
    
};

#endif // __MAIN_SCENE_H__

Emirhan YÄ±lmaz

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What is meant by local scope? I did not fully understand. Can you explain via code file please. This is my full .cpp file:

#include "MainScene.h"
#include "MyBodyParser.h"
#include "SimpleAudioEngine.h"

USING_NS_CC;

Scene* MainScene::createScene()
{
    auto scene = Scene::createWithPhysics();
    scene->getPhysicsWorld()->setDebugDrawMask(PhysicsWorld::DEBUGDRAW_NONE);
    
    auto layer = MainScene::create();
    layer->setPhysicsWorld(scene->getPhysicsWorld());
    
    scene->addChild(layer);
    
    return scene;
}

bool MainScene::init()
{
    if ( !Scene::init() )
    {
        return false;
    }
    
    LayerColor *_bgColor = LayerColor::create(Color4B(0, 191, 255,230));
    this->addChild(_bgColor, -10);
    
    auto visibleSize = Director::getInstance()->getVisibleSize();
    Vec2 origin = Director::getInstance()->getVisibleOrigin();
    
    auto listener = EventListenerTouchOneByOne::create();
    listener->onTouchBegan = CC_CALLBACK_2(MainScene::onTouchBegan, this);
    _eventDispatcher->addEventListenerWithSceneGraphPriority(listener, this);
    
    auto contactListener = EventListenerPhysicsContact::create();
    contactListener->onContactBegin = CC_CALLBACK_1(MainScene::onContactBegin, this);
    this->getEventDispatcher()->addEventListenerWithSceneGraphPriority(contactListener, this);
    
    auto edgeNode = Node::create();
    edgeNode->setPosition(Vec2(origin.x + visibleSize.width / 2, origin.y + visibleSize.height / 2));
    
    auto edgeBody = PhysicsBody::createEdgeBox(visibleSize, PHYSICSBODY_MATERIAL_DEFAULT, 3);
    
    edgeNode->setPhysicsBody(edgeBody);
    
    this->addChild(edgeNode);
    
    auto circle = Sprite::create("circle.png");
    circle->setPosition(Vec2(origin.x + visibleSize.width / 2, origin.y + visibleSize.height - 80));
    circle->runAction(RepeatForever::create(RotateBy::create(3.0f, 360)));
    
    MyBodyParser::getInstance()->parseJsonFile("circle.json");
    
    auto circleBody = MyBodyParser::getInstance()->bodyFormJson(circle, "circle", PhysicsMaterial(0, 0, 1));
    
    if(circleBody != nullptr) {
        circleBody->setDynamic(false);
        circle->setPhysicsBody(circleBody);
    }
    
    //this->addChild(circle);
    
    auto apple = Sprite::create("apple.png");
    apple->setPosition(Vec2(origin.x + visibleSize.width / 2, origin.y + visibleSize.height - 80));
    
    auto appleBody = PhysicsBody::createCircle(apple->getContentSize().width / 2, PhysicsMaterial(0, 0, 0));
    appleBody->setCollisionBitmask(1);
    appleBody->setContactTestBitmask(true);
    
    appleBody->setDynamic(false);
    apple->setPhysicsBody(appleBody);
        
    this->addChild(apple);
    
    auto cloud1 = Sprite::create("cloud.png");
    cloud1->setPosition(Vec2(origin.x + 25, origin.y + visibleSize.height / 2));
        
    this->addChild(cloud1);
        
    auto cloud2 = Sprite::create("cloud.png");
    cloud2->setPosition(Vec2(origin.x + 145, origin.y + 300));
        
    this->addChild(cloud2);
    
    arrow = Sprite::create("arrow.png");
    arrow->setPosition(Vec2(origin.x + visibleSize.width / 2, origin.y + visibleSize.height / 6));
    
    arrowBody = PhysicsBody::createBox(arrow->getContentSize(), PhysicsMaterial(0, 0, 0));
    arrowBody->setCollisionBitmask(2);
    arrowBody->setContactTestBitmask(true);
    arrowBody->setDynamic(false);
    arrow->setPhysicsBody(arrowBody);
    
    this->addChild(arrow);
    
    return true;
}

bool MainScene::onTouchBegan(cocos2d::Touch *touch, cocos2d::Event *event) {
    action = MoveBy::create(1.0f, Vec2(0, 200));
    arrowBody->setDynamic(true);
    arrow->runAction(action);
    
    return true;
}

bool MainScene::onContactBegin(cocos2d::PhysicsContact &contact) {
    PhysicsBody *a = contact.getShapeA()->getBody();
    PhysicsBody *b = contact.getShapeB()->getBody();
    
    if ( (1 == a->getCollisionBitmask() && 2 == b->getCollisionBitmask() ) || ( 2 == a->getCollisionBitmask() && 1 == b->getCollisionBitmask() ) ) {
        arrowBody->setDynamic(false);
    }
    
    return true;
}

and my header file:

#ifndef __MAIN_SCENE_H__
#define __MAIN_SCENE_H__

#include "cocos2d.h"
#include "MyBodyParser.h"

class MainScene : public cocos2d::Scene
{
public:
    static cocos2d::Scene* createScene();
    
    virtual bool init();
    
    CREATE_FUNC(MainScene);
    
    bool onTouchBegan(cocos2d::Touch *touch, cocos2d::Event *event);
    
    cocos2d::Sprite *arrow;
    cocos2d::MoveBy *action;
    cocos2d::PhysicsBody *arrowBody;
    
    cocos2d::PhysicsWorld *physicsWorld;
    
    void setPhysicsWorld(cocos2d::PhysicsWorld *world) {physicsWorld = world;};
    
    bool onContactBegin(cocos2d::PhysicsContact &contact);
    
};

#endif // __MAIN_SCENE_H__

Sonar Systems admin

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Scene variable has a local scope as it is only usable in that method not outside of it.