Question

我正在开发一款带有SpriteKit的太空射击游戏用于测试目的。游戏领域是700 x 700像素/点大。显然是不适合iPhone屏幕。这意味着我需要一些影响玩家+敌人+子弹+小行星的滚动。我搜索了谷歌，但滚动的大多数主题是指Cocos2D，几乎总是指Cocos2D的特定功能，不是由精灵工具包提供的。所以事情是这是我的第一个游戏，所以我不确定实现多向滚动的正确方法是什么。我希望你们能给我一个解决方案和/或提示/教程或其他任何有助于我的东西：D

Answer 1

创建你的＆＃34;宇宙飞船＆＃34;，创建一个摄像机节点，在更新方法中，让你的摄像机始终以宇宙飞船为中心。

与此问题类似：How to make camera follow SKNode in Sprite Kit?

-(void)centerOnNode:(SKNode*)node {
    CGPoint cameraPositionInScene = [node.scene convertPoint:node.position fromNode:node.parent];
    cameraPositionInScene.x = 0;
    node.parent.position = CGPointMake(node.parent.position.x - cameraPositionInScene.x, node.parent.position.y - cameraPositionInScene.y);
}

然后你必须弄清楚你自己的游戏机制如何移动，但如果你只是暗示船跟随你的手指，你可以使用SKActions动画手指位置。示例：https://stackoverflow.com/a/19172574/525576

-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {

    for (UITouch *touch in touches) {

        for (UITouch *touch in touches) {

            CGPoint location = [touch locationInNode:self];

            CGPoint diff = CGPointMake(location.x - _myPlayer.position.x, location.y - _myPlayer.position.y);

            CGFloat angleRadians = atan2f(diff.y, diff.x);

            [_myPlayer runAction:[SKAction sequence:@[
                                [SKAction rotateToAngle:angleRadians duration:1.0],
                                [SKAction moveByX:diff.x y:diff.y duration:3.0]
                                ]]];
        }
    }
}

Answer 2

解决了它，感谢ray wenderlich

CGSize winSize = self.size;

int x = MAX(player.position.x, winSize.width / 2 );
int y = MAX(player.position.y, winSize.height / 2 );
x = MIN(x, worldSize.width - winSize.width / 2 );
y = MIN(y, worldSize.height - winSize.height/ 2 );
CGPoint actualPosition = CGPointMake(x, y);

CGPoint centerOfView = CGPointMake(winSize.width/2, winSize.height/2);
CGPoint viewPoint = ccpSub(centerOfView, actualPosition);

world.position = viewPoint;

SpriteKit多向滚动

2 个答案: