cocos2d-iphone

问题 I have a line, which is a sprite made by using this code CGPoint diff = ccpSub(startLocation, endLocation); float rads = atan2f( diff.y, diff.x); float degs = -CC_RADIANS_TO_DEGREES(rads); float dist = ccpDistance(endLocation, startLocation); CCSprite *line = [CCSprite spriteWithFile:@"line.png"]; [line setAnchorPoint:ccp(0.0f, 0.5f)]; [line setPosition:endLocation]; [line setScaleX:dist / line.boundingBox.size.width]; [line setRotation: degs]; line.tag = 1; [_lines addObject:line]; [self

问题 I've got a question: My games hero can jump ( CCJumpTo ) and move to forward and backward direction ( CCMoveTo ). I faced with problem: if game recived a command from user to move the hero, but in this time hero is jumping ( CCJumpTo ), how can I do this command after the end of jumping. (can I use some stack of actions for one sparite in cocos2d) I can't use immediately [self.sprite stopAllActions]; to begin CCMoveTo because the hero have to finish the jump action and if I use CCMoveTo the

问题 I have a sprite : ombreoeuf1 = [CCSprite spriteWithFile:@"mangeurcentremieu3_03.png" ]; ombreoeuf1.position = ccp(240,160); [self addChild:ombreoeuf1]; And I would like to rotate it constantly around an anchor point. How can I do it? 回答1: You can first set anchor point by setting the property anchorPoint , for example: [ombreoeuf1 setAnchorPoint:ccp(0,0)] and then set rotation (in degrees) by setting another property rotation : [ombreoeuf1 setRotation:90] anchorPoint and rotation are both

问题 I have a sprite : ombreoeuf1 = [CCSprite spriteWithFile:@"mangeurcentremieu3_03.png" ]; ombreoeuf1.position = ccp(240,160); [self addChild:ombreoeuf1]; And I would like to rotate it constantly around an anchor point. How can I do it? 回答1: You can first set anchor point by setting the property anchorPoint , for example: [ombreoeuf1 setAnchorPoint:ccp(0,0)] and then set rotation (in degrees) by setting another property rotation : [ombreoeuf1 setRotation:90] anchorPoint and rotation are both

问题 So far I am able to control my sprite's side to side movement with buttons in Cocos2d. I am now trying to incorporate a jump animation but I have absolutely no idea how to do this. I have tried one sample code which utilized the init method and combined to animations (jump up and jump down) but whenever I tried to move the sprite while it was jumping i got a SIGABRT error. Please note that I am very unexperienced with Cocos2d and walking me through the steps to make a successful jump

问题 I am developing a casino roulette game in box2d. As you know in this game a ball/dice will be in a circular spinning wheel. First I tried with b2circleShape but it didn't work. I mean that the ball is not sitting inside the circular shape. Then I tried with b2EdgeShape. But for the b2edgeShape I need to create as many vertices as I can to build a smooth circular surface. Is there anyway that I can create such circle shapes which are not polygons or which are not solid polygons? If have any

问题 I want to draw a Cubic/Quad Bezier with Cocos2d v3. I looked at CCDrawNode but no change. Does anyone know a way around? Thanks!! 回答1: finally, I found the solution: https://github.com/njt1982/CCDrawNode-Bezier 回答2: This is how I did it in Cocos2d 3.3: // blue test auto bluN = DrawNode::create(); //Draw a blue quadratic bezier curve Color4F blue(0, 0, 1, 1); bluN->drawCubicBezier(Vec2(0.0, 0.0), Vec2(_visibleSize.height, 0.0), Vec2(_visibleSize.height, _visibleSize.height), Vec2(0.0,

问题 Hi I have a loop adding monsters to an NSMutableArray - (void)addMonster:(CCTime)dt { _monster1 = [[Monster1 alloc] init]; for(int i=0;i<=num; i++) { [spriteArray insertObject:_monster1 atIndex:num]; } [_physicsWorld addChild:_monster1]; num++; } in my update loop this code is meant to check if each sprite has passed a certain point: for (int i=0; i <= num; i++) { CCSprite *tempSprite = (CCSprite *) [spriteArray objectAtIndex:i]; if (tempSprite.position.x > 100) { structurelife--; } } However

问题 I have a boat with attached physics body. This boat is static physics body. Boat moving with CCAnimateMoveTo from left to right. When I tap on screen my character fall down. I detect collisions well. But I want that after collision my character just fall on boat and keep moving with it. Character is dynamic body. Link to sample video: Sample video Here I create a boat: - (void)createBoat { currentBoat = [CCSprite spriteWithImageNamed:@"Boat.png"]; currentBoat.position = ccp(0 - currentBoat

问题 I want to show on the screen the current score of the gameplay and the storical best score. It is work, but every times i restart the game the best score change even if the current score is lower than the best score. CCLabelTTF *punteggio; NSString *stringa; NSString *stringa2; CCLabelTTF *punteggioMAX; int score; int scoreMAX; There are the methods to SAVE the score, to add the score and to reset the score at the end of the game. -(void)aum{ score++; stringa = [NSString stringWithFormat:@