iPhone加速度计校准

Question

如何为我的iPhone游戏正确校准加速度计？目前，当手机放在平面上时，挡板会漂移到左侧。高通或低通滤波器不是可接受的解决方案，因为我需要即使在低值和高值时也能完全控制挡板。我知道苹果有BubbleLevel示例，但我觉得它很难跟进...有人能简化这个过程吗？

我的加速度计代码如下：

-(void)accelerometer:(UIAccelerometer *)accelerometer didAccelerate:(UIAcceleration *)acceleration {

float acelx = -acceleration.y;
float x = acelx*40;

Board *board = [Board sharedBoard];
AtlasSprite *paddle = (AtlasSprite *)[board.spriteManager getChildByTag:10];

if ( paddle.position.x > 0 && paddle.position.x < 480) {
    paddle.position = ccp(paddle.position.x+x, paddle.position.y);
}

if ( paddle.position.x < 55 ) {
    paddle.position = ccp(56, paddle.position.y);
}

if ( paddle.position.x > 435 ) {
    paddle.position = ccp(434, paddle.position.y);
}

if ( paddle.position.x < 55 && x > 1 ) {
    paddle.position = ccp(paddle.position.x+x, paddle.position.y);
}

if ( paddle.position.x > 435 && x < 0) {
    paddle.position = ccp(paddle.position.x+x, paddle.position.y);
}
}

感谢您！

- user2393462435

Answer 1

好的，问题解决了，解决方案非常简单，让我感到有些尴尬，因为我早该想到了。它就是这么简单：

在一个“校准按钮”中：

//store the current offset for a "neutral" position
calibration = -currentAccelX * accelerationFactor;

在游戏时间加速计功能中：

//add the offset to the accel value
float x = (-acceleration.y * accelerationFactor) + calibration;

这很简单，只需添加偏移量即可。* 隐藏他的头 *

- user2393462435

---

这是该主题的全面解释：http://www.iphonedevsdk.com/forum/iphone-sdk-tutorials/39833-tutorial-accelerometer-calibration-optimizations.html - Alexei Sholik

这是一个旧的帖子，但我很好奇currentAccelX是什么类型的对象，accelerationFactor又是什么。你能帮忙解答一下吗？ - SimplyKiwi

是的，你从哪里得到了那些变量；currentAccelX和accelerationFactor？这篇帖子早在2011年就过时了...我知道现在它甚至更老了，但也许有人可以帮助我？谢谢。 - marciokoko

这是我目前的代码： //从StackOverflow校准代码 float calibration = -acceleration.x * accelerationFraction; float x = (-acceleration.y * accelerationFraction) + calibration;accelerationFraction = acceleration.y*2; if (accelerationFraction < -1) { accelerationFraction = -1; } else if (accelerationFraction > 1) { accelerationFraction = 1; } //API更改将委托设置为self if (orientation == UIDeviceOrientationLandscapeLeft){ accelerationFraction *= -1; } - marciokoko

请阅读我在此处的解释：http://www.iphonedevsdk.com/forum/iphone-sdk-tutorials/39833-tutorial-accelerometer-calibration-optimizations.html - user2393462435

Answer 2

这是我目前的代码：

//calibrate code from StackOverflow
float calibration = -acceleration.x * accelerationFraction;
float x = (-acceleration.y * accelerationFraction) + calibration;

//My original code
accelerationFraction = acceleration.y*2;
if (accelerationFraction < -1) {
    accelerationFraction = -1;
} else if (accelerationFraction > 1) {
    accelerationFraction = 1;
}
//API CHANGE set delegate to self
if (orientation == UIDeviceOrientationLandscapeLeft){
    accelerationFraction *= -1;
}

- marciokoko