如何使用 zRotation 约束阻止我的角色过度旋转? [英] How to stop my character from over rotating with zRotation constraints?

问题描述

我在我正在开发的平台游戏中有一辆车，我希望能够允许旋转，以便它可以翻山越岭之类的.我想限制我的车辆在正负方向旋转 30 度.

I have a vehicle in a platformer game I'm working on that I want to be able to allow rotation so it can roll up hills and such. I want to limit my vehicle to 30 degrees rotation in the negative and positive direction.

问题是当我启用旋转并从悬崖或直边下降处滚下时，我的车辆从侧面翻倒并着地.我一直在寻找一种方法来将 zRotation 限制在每个方向上的设定度数.

The issue is when i have rotation enabled and roll off of a cliff or straight edge drop off, my vehicle flips over off the side and lands on its head. I've been searching for a way to limit the zRotation to a set number of degrees in each direction.

我尝试使用本教程中的 IK 约束部分:https://www.raywenderlich.com/129895/sprite-kit-inverse-kinematics-swift-2 在我的更新功能中，但没有效果.

I tried using the IK constraints part from this tutorial: https://www.raywenderlich.com/129895/sprite-kit-inverse-kinematics-swift-2 in my update function, but it had no effect.

然后我发现了这个:https://developer.apple.com/documentation/spritekit/skconstraint/1519706-zrotation#declarations

这似乎正是我所需要的，但我无法弄清楚如何实现它.任何建议将不胜感激！

that seems to be exactly what I need, but I can't quite figure out how to implement it. any advice would be appreciated!

推荐答案

这应该可以解决问题:

  let thirtyDegrees = CGFloat(0.523599) // Convert degrees to rads.

  let rotationRange = SKRange(lowerLimit: -thirtyDegrees, upperLimit: thirtyDegrees)

  let rotationConstraint = SKConstraint.zRotation(rotationRange)

  let vehicle = SKSpriteNode()

  vehicle.constraints = [rotationConstraint]

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