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我正在关注 Learn COCOS2D 书中的 BOX2D 教程，我开始在控制台上看到这个错误，比如每秒 10 次。我用谷歌搜索了这个错误，但找不到任何相关信息。有些人在谈论着色器文件，但我不知道那些是什么。有些人说不要使用多个 GLVIEW，但我不认为我正在这样做。下面是实现文件的完整代码。

错误消息：OpenGL 错误 0x0500 在 -[CCTextureAtlas drawNumberOfQuads:fromIndex:] 556

- (void)dealloc
{
    if(world){
        delete world;
        world = NULL;
    }
    if(debugDraw){
        delete debugDraw;
        debugDraw = nil;
    }
    [super dealloc];
}

+(id)scene{
    CCScene *scene = [CCScene node];
    PuzzleLayer *layer = [self node];
    [scene addChild:layer];
    return scene;
}

-(void)setupWorld{
    b2Vec2 gravity = b2Vec2(0.0f, -10.0f);
    //bool doSleep = true;
    world = new b2World(gravity);
}

-(void)createBoxAtLocation: (CGPoint)location withSize:(CGSize)size{
    CCLOG(@"Box location: %.0f, %.0f", location.x, location.y);
    b2BodyDef bodyDef;
    bodyDef.type = b2_dynamicBody;
    bodyDef.position = b2Vec2(location.x/PTM_RATIO, location.y/PTM_RATIO);
    b2Body *body = world->CreateBody(&bodyDef);

    b2PolygonShape shape;
    shape.SetAsBox(size.width/2/PTM_RATIO, size.height/2/PTM_RATIO);
    b2FixtureDef fixtureDef;
    fixtureDef.shape = &shape;
    fixtureDef.density = 1.0;
    body->CreateFixture(&fixtureDef);
}

-(void)setupDebugDraw{
    debugDraw = new GLESDebugDraw(PTM_RATIO * [[CCDirector sharedDirector] contentScaleFactor]);
    world->SetDebugDraw(debugDraw);
}

-(void)draw{
    glDisable(GL_TEXTURE_2D);
    world->DrawDebugData();
    glEnable(GL_TEXTURE_2D);
}

-(id)init{
    if(self = [super init]){
        [self setupWorld];
        [self setupDebugDraw];
        [self scheduleUpdate];
        self.isTouchEnabled = YES;
    }
    return self;
}

-(void)registerWithTouchDispatcher{
    [[CCTouchDispatcher sharedDispatcher] addTargetedDelegate:self priority:0 swallowsTouches:YES];
}

-(void)update:(ccTime)dt{
    int32 velocityIterations = 3;
    int32 positionIterations = 2;
    world->Step(dt, velocityIterations, positionIterations);
}
-(BOOL)ccTouchBegan:(UITouch *)touch withEvent:(UIEvent *)event{
    CGPoint touchLocation = [touch locationInView:[touch view]];
    touchLocation = [[CCDirector sharedDirector] convertToGL:touchLocation];
    touchLocation = [self convertToNodeSpace:touchLocation];
    b2Vec2 locationWorld = b2Vec2(touchLocation.x/PTM_RATIO, touchLocation.y/PTM_RATIO);
    [self createBoxAtLocation:touchLocation withSize:CGSizeMake(50, 50)];
    return TRUE;
}
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1 回答 1

5

OpenGL 错误 0x0500 = GL_INVALID_ENUM，有关 openGL 错误的更多详细信息：请查看此处

我猜你的 cocos2d 版本是 2.0 或更高。Cocos2d 2.0 使用 openGLES2.0，因为 opengl 立即模式调用是不允许的......看你的代码 glEnable 被使用。

将您的绘图功能替换为

-(void) draw
{
    [super draw];
    ccGLEnableVertexAttribs( kCCVertexAttribFlag_Position );
    kmGLPushMatrix();
    self.world->DrawDebugData();    
    kmGLPopMatrix();
}

这是另一个线程，请参阅我的答案以获取更多详细信息：

于 2013-03-17T18:54:14.917 回答