Raycasting for Weapon

Help and Feedback Scripting Support
#1

You can write your topic however you want, but you need to answer these questions:

  1. What do you want to achieve? Keep it simple and clear!
    I would love to acheive an understanding of raycasting and why and how it is used on a weapon.
  2. What is the issue? Include screenshots / videos if possible!
    Lack of understanding in area of raycasting.
  3. What solutions have you tried so far? Did you look for solutions on the Developer Hub?
    I have watched multiple videos on how to make a gun and found out how to make it but they dont explain why raycasting is needed.
#2

Raycasting is used in collision detection, .Touched is usually only used for stationary objects really.

the term Raycasting is self explanitory, It casts a ray. A ray is a line with an Origin and a Direction, you can use roblox’s methods like :FindPartOnRay() to get any intercepting parts.

So the reason guns use raycasting is because, it practically shoots a straight line in the bullet’s trajectory.
Then you use the :FindPartOnRay() method to get a part which the ray has hit. From there you can get the humanoid and damage it etc.

https://developer.roblox.com/en-us/articles/Raycasting

If you have any further questions, let me know.

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#3

Thank you very much. :grinning:

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#4

Quick question how would i go about making trajectory? Like a crossbow’s

#5

If you want to calculate a trajectory to mathematically use it, I’d look into mathematical functions and learn how to implement them into roblox.

Otherwise if you just want to make it move like a normal arrow, roblox’s gravity will automatically do that assuming the arrow isn’t anchored

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#6

Thanks for the tremendous help.

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