Solved Vectors and Directions

I do not know how to calculate the vector and bind to them effects, fireball, etc. I looked at a lot of instructions, but I did not understand ((
And how to make a vector straight with fire effects??

 

Well, all vectors are technically straight, as they represent a direction.

What are you trying to achieve?

 

I'm trying to do something like that in the QuakeWar, the same effect of the shot

 

A slick way to adjust points in 3D space is to use transformation matrices.

When you multiply a 3D point by a translation matrix, it'll move it in any of the 4 directions based on the matrix.

For example:

Code:

|1, 0, 0, 3|   | 5|   | 6|
|0, 1, 0, 4|   |10|   |12|
|0, 0, 1, 5|   |15|   |18|
|0, 0, 0, 1| * | 1| = | 0|

The 4x4 matrix is the translation matrix (xt=3, yt=4, zt=5), the 1x4 matrix would be the coordinate that's been translated (x=5, y=12, z=18) and the result, is what you would imagine, the coordinate with the applied translations.

To draw a straight line in 3D space, you can create a translation matrix, determine a starting location, then inside a loop, play a particle effect at said location and multiply the location by the matrix.

There are also rotation matrices, that you can do some pretty fun things with.

 

@Orcane
Don't you think just adding a vector (which you can then multiply by a scalar) would be easier to grasp? Using a translation matrix (not to mention understanding it) is not very easy for the regular joe who hasn't studied rather advanced linear algebra.

We discussed this same issue in a thread a while ago:
https://bukkit.org/threads/making-a-particle-line-from-point-1-to-point-2.465415/

 

Sure, however I think using matrices are more helpful in the long run, as you can do more powerful things with them later on.

 

@Orcane
Sure, you can do advanced things with matrices, but there's no need to overcomplicate a problem. Using translation matrices is stupid in this case, not just because matrix multiplication is a bit difficult, but also because Bukkit has such nice support for adding and multiplying vectors. Look at the thread I linked, you cannot say that that is not simpler compared to using a matrix.

 

I'm not going to argue what's the best way to solve a problem, each to their own I guess.

 

Thanks