How can I use raycasting?

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#1

Im new to raycasting, and i viewed a few dev forums and they didnt seem to work for me.

local From = workspace:WaitForChild("From")
local To = workspace:WaitForChild("To")

local Direction = From.Position - To.Position

local Params = RaycastParams.new()

local Result = workspace:Raycast(From.Position, Direction)

if Result and Result.Instance then
    Result.Instance.Color  =Color3.new(1,0,0)
end

This i have tried yet it didn’t work

1 Like
#2 
local From = workspace:WaitForChild("From")
local To = workspace:WaitForChild("To")

local Direction = From.Position - To.Position

local Params = RaycastParams.new()

local Result = workspace:Raycast(From.Position, Direction)

if Result then
	Result.Instance.Color  = Color3.FromRGB(1,0,0)
else
	warn("No raycast result!")
end

Try this, also check anything in output

#3 
local RaycastParameters = RaycastParams.new()
RaycastParameters.IgnoreWater = true
RaycastParameters.RespectCanCollide = false
RaycastParameters.FilterType = Enum.RaycastFilterType.Exclude

local Raycast = workspace:Raycast(game.Workspace.Start.Position, game.Workspace.Start.CFrame.LookVector * 300, RaycastParameters) 

if Raycast and Raycast.Instance then 
   Raycast.Instance.Color = Color3.new(0,1,0) 
end
#4

no raycast result

character limit charter limit

#5

this doesnt have a direction when you raycast it

#6

game.Workspace.Start.CFrame.LookVector * 300

#7

What happens if you place a part between both parts?

#8

yeah well either way it doesnt work

#9

still gives the warning “no raycast result”

#10

For me it does, did you make sure to rotate the parts correctly?

image
image1012×533 157 KB

#11

Wait so its based on orientation?

#12

Yes, it depends on the way the part is facing. I made it use a part for the position and direction for easier testing on my side.

1 Like
#13

What about doing this with characters?
Like if the characters leg touches another charcaters leg

#14

It should return the characters leg.

#15

In their case, it would not depend on how the part faces though

#16

its not on the parts face its what the part touches but that part is the characters limb

#17

Might you know?

lets say you touch a object and you are using the .touched function

how do you raycast if it was a players leg? or the object

#18

.Touched returns the p2 that touched p1 so there’s really no need to check via raycast if it was a players leg or a specific object.

#19

It depends why and what you are raycasting too. You have the hit in the .Touched function. In this case, then face might matter

#20

i think the the direction should be To.Position - From.Position because the difference of two points has the target or going to position as the minuend while the starting or coming from position is the subtrahend

local From = workspace:WaitForChild("From")
local To = workspace:WaitForChild("To")

local Direction = To.Position - From.Position

local Params = RaycastParams.new()

local Result = workspace:Raycast(From.Position, Direction)

if Result and Result.Instance then
    Result.Instance.Color = Color3.new(1,0,0)
end