Hi!
I’m having an issue with trying to use the ray-plane intersection formula for an isometric shooting game. When I click on the screen, I want the bullets to follow exactly where the mouse is. But this only works for when the player is standing still.
Video of it working when standing still:
The problem is, that when the player starts walking, the bullets start to go in different directions and it stops working when I aim at certain spots.
Video of it not working when player is walking:
There is also another problem I ran into where if I move my mouse over the player, they start glitching out.
Video below:
Idea behind the code:
I put my code for player rotation below. I’m using the ray-plane intersection formula so I can calculate the required point for the player to steer towards so that the player shoots exactly where the mouse is pointing at. I’m doing it this way because with the height of the bullet and the height of the floor are different so when the player clicks on the floor, the bullet will travel over that spot in the floor. But that means if they are looking sideways, the bullet will be higher on the screen than the mouse.
Below is the code to make the player face their mouse.
Code:
local function rayPlane(planepoint, planenormal, origin, direction)
return -((origin-planepoint):Dot(planenormal))/(direction:Dot(planenormal))
end
local function pointGun()
local character = player.Character
if character then
local root = character:FindFirstChild("HumanoidRootPart")
if root then
local camera = workspace.CurrentCamera
local unitRay = camera:ScreenPointToRay(mouse.X, mouse.Y)
local RootPos = root.Position
local t = rayPlane(character.Torso.Position, Vector3.new(0, 1, 0), unitRay.Origin, unitRay.Direction)
local planeIntersect = (unitRay.Direction * t) + unitRay.Origin
root.CFrame = CFrame.new(RootPos, planeIntersect)
end
end
end
gunModel.Equipped:Connect(function()
RunService:BindToRenderStep("followMouse", 1, pointGun)
end)
Below is the code for shooting the ray from the gun with the bullet animation:
local function rayPlane(planepoint, planenormal, origin, direction)
return -((origin-planepoint):Dot(planenormal))/(direction:Dot(planenormal))
end
function Weapon:castingBullet(gunModel, character)
local raycastParams = RaycastParams.new()
raycastParams.FilterType = Enum.RaycastFilterType.Blacklist
raycastParams.FilterDescendantsInstances = {gunModel, character, self.bullet}
raycastParams.IgnoreWater = true
local muzzle = gunModel.muzzle.WorldPosition
local raycastResult = workspace:Raycast(character.HumanoidRootPart.Position, character.HumanoidRootPart.CFrame.LookVector*5000, raycastParams)
if(raycastResult)then
print(character.HumanoidRootPart.Position)
self.bullet.Parent = game.Workspace.AllBullets
local intersection = raycastResult and raycastResult.Position
local distance = (muzzle - intersection).Magnitude
local speed = 300
local time = (distance/speed)
local BulletInfo = TweenInfo.new(time, Enum.EasingStyle.Linear, Enum.EasingDirection.Out, 0, false, 0)
self.bullet.Position = muzzle
local BulletShot = TweenService:Create(self.bullet, BulletInfo, {Position = raycastResult.Position})
BulletShot:Play()
end
end
Been stuck on this for two days now while looking around for some methods but none of them seemed to work. Any advice would be helpful. 