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I was looking at raycasting and saw a line of code and idk what it does?
Hello, new to raycasting, but very confused with the end
local ray = Ray.new(script.Parent.Handle.CFrame.Position, (mouse.Hit.Position - script.Parent.Handle.CFrame.Position).unit * 300)
At the end the .unit * 300 part what does that do? First of all what does unit mean, second of all, what is * that supposed to do?
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* is multiplication and unit is the Magnitude except from 0 to 1 or something like that greatneil80 2647 — 5y
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wdym 0 to 1? bluemountainlion 56 — 5y
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The piece of code given to the second parameter of Ray.new() is simple vector math. It first calculates a direction of size 1 unit and multiplying it to a scalar value of 300. Making the length of that ray "300" units/studs long. https://devforum.roblox.com/t/learning-vector-math/97559/3 xPolarium 1388 — 5y
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Let's say you have a Vector3 with the value of (10,0,1), the unit would be a ratio of all components combined.
t = x + y + z
unit = Vector3.new(x / t, y / t, z / t)
Since 10 (x) + 0 (y) + 1 (z) is 11 t equals 11.
10 (x) / 11 (t) is 0.9090909...
1 (z) / 11 (t) is 0.0909090...
Therefor the unit is Vector3.new(0.9090909,0,0.09090909).
Unit can be used to set the distance of a raycast. The multiplication part is to change that distance.
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hmm im a little bit confused bluemountainlion 56 — 5y
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yeah im still really confused with unit and * bluemountainlion 56 — 5y