Question

我一直在为Phaser游戏苦苦挣扎。我一直试图制作我的游戏控制的移动版本，但是出于合理的原因，在达到0度，90度，180度或270度后，顺时针旋转我的汽车角色。逆时针工作正常。

这就是它的样子：

//I made a turnSpeed dependant on the car's current speed
turnSpeed = speed / 6000;

//I then check for a boolean which is true if the button is touched

if (rightArrowLeftIsPressed)
{
  playerCar.rotation += turnSpeed;
}
if (leftArrowLeftIsPressed)
{
  playerCar.rotation -= turnSpeed;
}
//This will snap the car to 0, 90, 180 or 270 degrees if no button is pressed and the car is close to that rotation already
else
{
  if (playerCar.rotation < 0.15 && playerCar.rotation > -0.15)
  {
    playerCar.rotation = 0;
  }
  if (playerCar.rotation > (Math.PI - 0.15) || playerCar.rotation < (-Math.PI + 0.15))
  {
    playerCar.rotation = Math.PI;
  }
  if (playerCar.rotation > -Math.PI / 2 - 0.15 && playerCar.rotation < -Math.PI / 2 + 0.15)
  {
    playerCar.rotation = -Math.PI / 2;
  }
  if (playerCar.rotation > Math.PI / 2 - 0.15 && playerCar.rotation < Math.PI / 2 + 0.15)
  {
    playerCar.rotation = Math.PI / 2;
  }
}

任何人都知道为什么会像这样限制顺时针旋转？

非常感谢。

Answer 1

Phaser有一个叫做“角度”的精灵属性来改变旋转方向。 Here is their example。尽量只使用Phaser中的属性，以避免在框架外遇到任何吸虫。

Answer 2

这是因为你的if逻辑错了。当您按rightArrowLeftIsPressed时，您正在顺时针旋转汽车 - 但是，您也没有按leftArrowLeftIsPressed正在执行else挡住车辆的.... // this will check to see if either button is pressed, if so rotate the car, if not, snap the car if (rightArrowLeftIsPressed || leftArrowLeftIsPressed) { if (rightArrowLeftIsPressed) playerCar.rotation += turnSpeed; if (leftArrowLeftIsPressed) playerCar.rotation -= turnSpeed; } //This will snap the car to 0, 90, 180 or 270 degrees if no button is pressed and the car is close to that rotation already else { if (playerCar.rotation < 0.15 && playerCar.rotation > -0.15) { playerCar.rotation = 0; } if (playerCar.rotation > (Math.PI - 0.15) || playerCar.rotation < (-Math.PI + 0.15)) { playerCar.rotation = Math.PI; } if (playerCar.rotation > -Math.PI / 2 - 0.15 && playerCar.rotation < -Math.PI / 2 + 0.15) { playerCar.rotation = -Math.PI / 2; } if (playerCar.rotation > Math.PI / 2 - 0.15 && playerCar.rotation < Math.PI / 2 + 0.15) { playerCar.rotation = Math.PI / 2; } }到最接近的90度。将您的代码更改为：

@Override
public String toString() {
    // Create a copy, don't share the array
    return new String(value, 0, count);
}

触摸按钮在Phaser中旋转

2 个答案: