ios - 从 2 个位置获取角度

Question

我有 2 个物体，当我移动一个物体时，我想获得另一个物体的角度。

例如:

Object1X = 211.000000, Object1Y = 429.000000
Object2X = 246.500000, Object2Y = 441.500000

我已经尝试了以下以及在阳光下的每一种变体:

double radians = ccpAngle(Object1,Object2);
double degrees = ((radians * 180) / Pi); 

但我只得到 2.949023 返回我想要的东西，比如 45 度等。

Answer 1

这个其他答案有帮助吗？

How to map atan2() to degrees 0-360

我是这样写的:

- (CGFloat) pointPairToBearingDegrees:(CGPoint)startingPoint secondPoint:(CGPoint) endingPoint
{
    CGPoint originPoint = CGPointMake(endingPoint.x - startingPoint.x, endingPoint.y - startingPoint.y); // get origin point to origin by subtracting end from start
    float bearingRadians = atan2f(originPoint.y, originPoint.x); // get bearing in radians
    float bearingDegrees = bearingRadians * (180.0 / M_PI); // convert to degrees
    bearingDegrees = (bearingDegrees > 0.0 ? bearingDegrees : (360.0 + bearingDegrees)); // correct discontinuity
    return bearingDegrees;
}

运行代码:

CGPoint p1 = CGPointMake(10, 10);
CGPoint p2 = CGPointMake(20,20);

CGFloat f = [self pointPairToBearingDegrees:p1 secondPoint:p2];

这将返回 45。

希望这对您有所帮助。