2D Platformer player script example

[Josh]

Pretty simple, just attach this to any entity and control with A, D, Space.

 

Don't place a camera in the scene, this will create one.

 

Script.movespeed=5--float
Script.cameradistance=40--float
Script.camerazoom=8--float
Script.orthographiceffect=1--float "Flatness"
Script.camerarange=10--float

function Script:Start()
   self.camera = Camera:Create()
   self.entity:SetPhysicsMode(Entity.CharacterPhysics)
   self.camera:SetRotation(0,0,0)
   self.camera:SetZoom(self.camerazoom*self.orthographiceffect)
   self.camera:SetRange(self.cameradistance*self.orthographiceffect-self.camerarange,self.cameradistance*self.orthographiceffect+self.camerarange)
   self.playerangle=90
   if self.entity:GetMass()==0 then self.entity:SetMass(10) end
end

function Script:UpdatePhysics()
   local window=Window:GetCurrent()
   local move=0
   if window:KeyDown(Key.D) then move = move + self.movespeed end
   if window:KeyDown(Key.A) then move = move - self.movespeed end
   local jump = 0
   if window:KeyHit(Key.Space)  then
       jump = 10
   end
   if move>0 then self.playerangle=90 end
   if move<0 then self.playerangle=-90 end
   self.entity:SetInput(self.playerangle,math.abs(move),0,jump,false, 1.0, 0.5, true)
end

function Script:UpdateWorld()
   --Update camera
   self.camera:SetPosition(self.entity:GetPosition())
   self.camera:Move(0,1.8/2,-self.cameradistance*self.orthographiceffect)
end

[YouGroove]

Some points after testing it :

- 2.5D is not possible in LE3 as collisions will make the character move in Z axis ( or is the script for 2D sprites without 3D collisions ?)

- I changed the values for the parameters of the camera and it has no effect, the camera is still very far from character.

- Giving a script without explaining how to use camera parameters and their effect is not very usefull.

[Josh]

Wait for the tutorial.

[gamecreator]

I applied the script to a cylinder and it used the middle of the cylinder as the foot, so half the cylinder was in the ground. When I applied a character controller it also started from the middle of the cylinder. I couldn't find in the tutorials how to change that. I think my cylinder may have been created sideways though (circle facing camera) so maybe it's a simple error on my part.

 

I also noticed that doubling the speed will get the bouncing effect down a 45 degree (or so) ramp. It makes sense that a high enough speed will eventually cause this but maybe that's a bit early.

 

But I don't use Lua anyway so I'll figure it out later. Thank you regardless.