Solved Player to Location angle calculation

Hey

I would like to know how you can calculate the angle between where the player is looking and a specific point in the world. Just the Yaw (2d) is fine, I would prefer both (2d & 3d). I've tried a few things with dot products and stuff, but I'm not that good with Vectors.
If anyone would like to help out, appreciated!

Here is a visual representation of what I want (2d):

 

@TheTinySpider http://jd.bukkit.org/dev/doxygen/d0...Vector.html#a5cc9f5ccdce6d51d4612f3cbaea2d2fa

 

That returns the angle between 2 points, what I need is the angle between a point and a point with direction

 

@TheTinySpider Location has a getDirection() method that returns a Vector - have you looked into that?

 

Yes I have, but that returns a normalized vector which I don't know how to compare with a directionless point

 

I would create a vector between the player and the block, and then simple call the angle method in vector. Note that the angle is in radians and if you want it in degrees then you can use Math.toDegrees(double radians) to convert it.

Code:java

 
Player player = //your player
Location blockLoc = //your block's location
//I cloned blockLoc incase you use it somewhere else, if you don't plan on using it again then you can remove the clone
player.getLocation().getDirection().angle(blockLoc.clone().subtract(player.getEyeLocation()).toVector())
 

 

Alright I got it, thanks to @fireblast709!

For anyone interested:

Code:

Vector a = position.toVector().subtract(location.toVector()).normalize();
Vector b = location.getDirection();
double angle = Math.acos(a.dot(b));
angle = Math.toDegrees(angle);