Move character in direction of mouse cursor

[YouGroove]

If i move mouse direction, the character rotates to that direction, and move to that direction if i have the "run" key pressed.

 

 

 

The mouse direction is taken on Script:UpdateWorld to rotate character to the direction.

How to get the angle of the mouse cursor to pass it to SetInput ?

 

(This is not my code , but from codeApe old physic problem )

 

 

function Script:UpdateWorld()
   local window = Window:GetCurrent()

-- Mouse pointer handling
self.screenCord = window:GetMousePosition()

-- Set height over floor to aim
self.screenCord.z = self.cam:GetPosition(true).y - self.entity:GetPosition(true).y

-- Convert mouse screen space coord to 3d space coord
local Vec3 worldCord = self.cam:UnProject(self.screenCord)
self.hairPiv:SetPosition(worldCord, false)

-- Make the player look at the mouse pointer
self.entity:Point(self.hairPiv, 2)

end

 

 

And update pysics where i can't figure out , how to calculate cursor angle for SetInput call ?

 

 

function Script:UpdatePhysics()

local window = Window:GetCurrent()



local zMod = 0
if window:KeyDown(Key.Z) then
zMod = 1 * Time:GetSpeed() * self.moveSpeed
end


local pos = self.entity:GetPosition()
local dir = Vec2(pos.z,pos.x):Normalize()
local angle = -Math:ATan2(dir.y,-dir.x)

self.screenCord.x = xMod

self.entity:SetInput(angle,zMod)

 

If anyone oculd help me on that ?

[Guppy]

arccos(a dot b / |a||b| )

[DudeAwesome]

I did something similar for a 3rd person game. dont have the code here now but it works fine:

 

1.get 3D point from player (Point A)

2. get window 2D position from mouse

3. Pick with 2D position from mouse

4. pickinfo.position (Point B )

5. now you can easily calculate the angle between A and B with dont sure but it was arctan((y2-y1)/(x2-x1)) (there is also a cosinus way but i dont know them right now) i guess to get the angle you also can do it with arctan2 but I believe atan2 gives you radians not degrees

 

6. I used http://www.leadwerks.com/werkspace/page/documentation/_/command-reference/math/mathcurveangle-r603 to get a smooth moving between different angles (turning 180 degrees would be superfast and I want a small "lag" to turn)

[YouGroove]

5. now you can easily calculate the angle between A and B with dont sure but it was arctan((y2-y1)/(x2-x1)) (there is also a cosinus way but i dont know them right now) i guess to get the angle you also can do it with arctan2 but I believe atan2 gives you radians not degrees

 

 

Thanks, but don't understand that.

 

Yes i have mouse Coords and Player 3D position : the angle player have in X,Z to mouse Coords , how to get that ?

 

How to do with that objects below ?

 

Enity.Player:GetPosition()

MouseX

MouseY

 

I just ask the lua code and math retrieving the angle if someone know how to.

[DudeAwesome]

I will post my solution later when I´m home to show you how I did it (I also had some trouble with the angle function but it works for me now)

[YouGroove]

Ok working now.

 

The working example (for WIKI or tutorials section)

function Script:Start()
--Player movement speed
self.moveSpeed = 0.3

-- Camera distance from player
self.camDist = 5

-- Create camera and position it
local camPos = self.entity:GetPosition(true)
self.cam = Camera:Create()
camPos.y = self.camDist
self.cam:Move(camPos)
self.cam:SetRotation(90,0,0)

-- Crosshair resources
self.cross = Texture:Load("Materials/HUD/crosshair.tex")
self.hairPiv = Pivot:Create();
self.screenCord = Vec3(0, 0, 0)

self.entity:SetFriction(0,0)
end

function Script:UpdateWorld()
local window = Window:GetCurrent()

-- Mouse pointer handling
self.screenCord = window:GetMousePosition()
-- Set height over floor to aim
self.screenCord.z = self.cam:GetPosition(true).y - self.entity:GetPosition(true).y

-- Convert mouse screen space coord to 3d space coord
local Vec3 worldCord = self.cam:UnProject(self.screenCord)
self.hairPiv:SetPosition(worldCord, false)

-- Make the player look at the mouse pointer
self.entity:Point(self.hairPiv, 2)

end

function Script:UpdatePhysics()
local window = Window:GetCurrent()

-- Player keyboard input
local xMod = 0;
if window:KeyDown(Key.D) then
xMod = 1 * Time:GetSpeed() * self.moveSpeed
elseif window:KeyDown(Key.Q) then
xMod = -1 * Time:GetSpeed() * self.moveSpeed
end

local zMod = 0
if window:KeyDown(Key.Z) then
zMod = 1 * Time:GetSpeed() * self.moveSpeed
elseif window:KeyDown(Key.S) then
zMod = -1 * Time:GetSpeed() * self.moveSpeed
end




local targetpos = worldCord
local posPlayer = self.entity:GetPosition()
local dir = Vec2(targetpos.z-posPlayer.z,targetpos.x-posPlayer.x):Normalize()
local angle = -Math:ATan2(dir.y,-dir.x)


self.entity:SetInput(angle,zMod)


end

[DudeAwesome]

nice example. I implemented this way for prototyping. you can also use IncAngle() if you dont like that the player follows the mouse that fast. so it take some msec to turn 180°

 

self.camera:Pick(App.window:GetMousePosition().x, App.window:GetMousePosition().y, self.mouseInfo, 0.0, true)
--angle to mouse/joystick
if self.mouseInfo.position.z - self.playerPosition.z >= 0 then
self.mouseAngle = Math:ATan((self.mouseInfo.position.x - self.playerPosition.x)/(self.mouseInfo.position.z - self.playerPosition.z))
end
if self.mouseInfo.position.z - self.playerPosition.z < 0 then
self.mouseAngle = Math:ATan((self.mouseInfo.position.x - self.playerPosition.x)/(self.mouseInfo.position.z - self.playerPosition.z))+180
end

self.playerAngle = Math:IncAngle(self.mouseAngle, self.playerAngle, 20.0)
self.entity:SetRotation(0,self.playerAngle,0) --later use SetInput

[YouGroove]

I don't understand a lot your code.

Well in my example you have only one Athan call, i think your and mine code do same thing.