lerp method
Linearly interpolate between this vector and v, where alpha is the percent distance along the line - alpha = 0 will be this vector, and alpha = 1 will be v.
v- Vector3 to interpolate towards.alpha- interpolation factor, typically in the closed interval0, 1.
Implementation
Vector3 lerp(Vector3 v, double alpha) {
x += (v.x - x) * alpha;
y += (v.y - y) * alpha;
z += (v.z - z) * alpha;
return this;
}