ios - 边界框逻辑的更简洁方法的数学公式？

下面我写了一些边界框逻辑，有点冗长。有没有办法使它更容易阅读，使支票看起来更干净和更简洁？

func validatePosition(position:SCNVector3, forNode node:SCNNode) -> SCNVector3 {
    var newPosition = position
    var maxVector = SCNVector3Zero
    var minVector = SCNVector3Zero

    let success = self.actionDelegate?.getBoundingBox(&minVector, max: &maxVector)
    guard success == true else {
        return newPosition
    }

    if newPosition.x < minVector.x && newPosition.x < 0 {
        newPosition.x = minVector.x
    }

    if newPosition.y < minVector.y && newPosition.y < 0 {
        newPosition.y = minVector.y
    }

    if newPosition.z < minVector.z && newPosition.z < 0 {
        newPosition.z = minVector.z
    }

    if newPosition.x > maxVector.x && newPosition.x > 0 {
        newPosition.x = maxVector.x
    }

    if newPosition.y > maxVector.y && newPosition.y > 0 {
        newPosition.y = maxVector.y
    }

    if newPosition.z > maxVector.z && newPosition.z > 0 {
        newPosition.z = maxVector.z
    }

    return newPosition
}

最佳答案

试试这个：

extension ClosedInterval {
    func clamp(value : Bound) -> Bound {
        return self.start > value ? self.start
            : self.end < value ? self.end
            : value
    }
}

extension SCNVector3 {
    func clamp(min min:SCNVector3, max: SCNVector3) -> SCNVector3 {
        let x = (min.x...max.x).clamp(self.x)
        let y = (min.y...max.y).clamp(self.y)
        let z = (min.z...max.z).clamp(self.z)
        return SCNVector3(x, y, z)
    }
}

func validatePosition(position:SCNVector3, forNode node:SCNNode) -> SCNVector3 {
    var newPosition = position
    var maxVector = SCNVector3Zero
    var minVector = SCNVector3Zero

    let success = self.actionDelegate?.getBoundingBox(&minVector, max: &maxVector)
    guard success == true else {
        return newPosition
    }

    newPosition = position.clamp(min: minVector, max: maxVector)
    return newPosition
}

关于ios - 边界框逻辑的更简洁方法的数学公式？，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/38346492/