Calculate the direction from vectorA to vectorB

Hello everyone, I make a little game that I am learning Unity3D,
You are playing as ball and have gathered the cubes ...
from a distance they could cubes into motion toward the players, but I need to calculate the direction from cube to player, I know that I could use Vector3.LookAt but I need a way to store variable for future action.

does anyone know how to calculate this direction?

-DrMrkev

 

It's basic hogh school math:
https://www.mathsisfun.com/polar-cartesian-coordinates.html

 

The direction from A to B is:

Code (CSharp):

1. Vector3 direction = (B - A).normalized;

 

If he wants it as a veftor aswell, but if e want an angle, then he needs to convert this to polar coordinates

 

so if I understand it, this

Code (CSharp):

1. Vector3 dir = (B - A).normalized \\"I use  for direction variables names like dir, dir1, dirB etc."

returns a Vector3 - the direction from point A to point B .......................
WOW it is so easy ...

 

No, its a vector wizh a length of 1 pointing in the direction of your gameobject. The difference is small but crucial

 

The direction is just B - A. Don't bother normalizing, unless you actually need to.

--Eric

 

Its still a vector pointing in a direction.
Difference
The vector can be used to give force or velocity to that gameObject in the direction the other object is. Its very useful for programmers

The direction can be used in some mathematical ways of calculating lengths, or in physics, forces. It is very useful for (you guessed it) mathematicians and physicians

Its a subtle difference, but its crucial

 

I think Eric was just saying, there's no need to normalize unless you need it normalized. Since normalizing requires extra math (including a square root) that can be considered expensive when done repeatedly.

Since a vector is defined as 'magnitude' and 'direction', and a normalized vector is just a vector whose magnitude is 1. Really both vectors (normalized or not) have the same information (direction), it's just the un-normalized one also has the magnitude (distance from a to b).

Heck, it could be said normalzing actually loses information, which means you just spent processing power to LOSE information. Why do that unless you need to lose it?

 

Deltax = x2-x1

Vector3 Direction = Destion - Source.

 

https://en.wikipedia.org/wiki/Direction_vector
https://en.wikipedia.org/wiki/Direction

 

your point?

linking random stuff doesn't really mean much.

Note, I'm not approaching this from some random wiki article perspective. I'm coming at this from over 15 years worth of study and experience in math, physics, and game design. I'm fairly certain I know what a vector is, and its definition.

 

lol, Since he's throwing some links at you, school him back with your links. Throw some space puppy in his face.

https://github.com/lordofduct/space...lob/master/SpacepuppyBase/Geom/PhysicsUtil.cs