在 3d 中沿向量查找点

Question

I have two points in 3d space, and i want to get a list of points between them which are located with "r" distance from each other. How can I do it most easily using the unity functions?

Answer 1

Vector3[] GetPointsInbetween(Vector3 a, Vector3 b, float offset){
    int count = (int)((b - a).magnitude / offset);
    Vector3[] result = new Vector3[count];

    Vector3 delta = (b - a).normalized * offset;

    for (int i = 0; i < count; i++) {
        result[i] = a + delta * i;
        Debug.Log(result[i]);
    }

    return result;
}

but .magnitude and .normalized are very expensive operations, try to avoid using this in Update()

Answer 2

您可以通过使用Vector3.MoveTowards http://docs.unity3d.com/ScriptReference/Vector3.MoveTowards.html来完成它

Answer 3

I'm not familiar with the Unitiy functions, but formally you describe linear interpolation between the two points. The line segment between the points A and B can be described by the parameterized form

A * s + B * (1-s)

where s is from the interval [0,1] .