Yes, there is already a thread for this. I was wondering, however, how I would make the second projectile offset from the player to create a faster fire effect?

 

link to the other thread http://www.minecraftforge.net/forum/index.php?topic=21851.0

The other thread already answers the question. Just create the two entities at the same time, but make one a bit farther out (ideally it would be at a distance that project moves in half a tick).

How do I make it farther out?

Just add some distance to x/y/z spawn position of your "bullet" in player "facing" vactor.

 

Best would be placing second (in tick) bullet between two others (previous and next).

Previous bullet (if exist) x/y/z Pos - (minus) x/y/z Pos of Next bullet will give you x/y/z distances between next/previous. Divide that by 2 and add to position (fixed) of middle bullet.

 

EDIT

Or above, both methods are "good", depending on situation - above (diesieben) might be better.

Set it's position. That will require some trigonometry/vector math.

 

First, get the player's look vector scaled to the appropriate length (the distance you want the projectile to move per half a tick). Minecraft already does that for you with the getLook(<length>) method. Then add the components of the resulting Vec3 to your original projectile position.

 

Could you give a code example because I'm not very experienced with Vectors and that kind of stuff?

A vector is a mathematical representation of a direction and distance. A 3-dimensional vector is represented by a Vec3 class in Minecraft. A Vec3 is practically just an x, y, z and the concept of direction and distance is relative to 0, 0, 0.

 

The Vec3 class has methods for adding, multiplying, etc. including more esoteric mathematical operations like dot product and cross product.

 

There are various methods that return Vec3. One is called the "look vector" which represents the direction the player is looking. I think there is also a method called getEyePosition() or similar which gives a vector (basically the position) of the player's eyes. The look vector is normalized (meaning it has length of 1.0) so if you want to go farther in the direction you need to multiply it by the distance you want to go.

 

So putting this all together, you want to get the eye position and add the look vector multiplied by distance you want. Then spawn the projectile at the x, y, z from that resulting vector.

A vector is a mathematical representation of a direction and distance. A 3-dimensional vector is represented by a Vec3 class in Minecraft. A Vec3 is practically just an x, y, z and the concept of direction and distance is relative to 0, 0, 0.

 

The Vec3 class has methods for adding, multiplying, etc. including more esoteric mathematical operations like dot product and cross product.

 

There are various methods that return Vec3. One is called the "look vector" which represents the direction the player is looking. I think there is also a method called getEyePosition() or similar which gives a vector (basically the position) of the player's eyes. The look vector is normalized (meaning it has length of 1.0) so if you want to go farther in the direction you need to multiply it by the distance you want to go.

 

So putting this all together, you want to get the eye position and add the look vector multiplied by distance you want. Then spawn the projectile at the x, y, z from that resulting vector.

 

So I've been trying what you said and I just don't get how to do this. Could someone please give a code example of how to multiply a vector and combine that with an Entity's position please?

Can you please give a code example because I don't know which numbers and methods to use and it's very confusing