Walk through walls

[codeape]

Hello

 

I like Leadwerks ... and have a lot fun with it ... however

 

I am playing around with the Steam Leadwerks (Lua) and try to make a simple "top down shooter". I have watched some tutorials and I thought I did this right.

 

I create my player (currently a cone) like this:

 

--Player
self.coneMat = Material:Load("Materials/Developer/greengrid.mat")
self.cone = Model:Cone()
self.cone:SetMaterial(self.coneMat)
self.cone:SetPosition(0,1.75,0)
self.cone:SetRotation(90,0,0)
local shape = Shape:Cone(0,0,0, 0,0,0, 1,1,1)
self.cone:SetShape(shape)

--Player movement speed
self.moveSpeed = 0.1

 

 

I have created a floor and 4 walls in the editor and the walls have "Physics mode : Rigid Body" and a shape size that corresponds to the wall size (used the "Fit Shape" button in the Physics tab).

 

The player movement code looks like this:

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

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

local curr = self.cone:GetPosition(true)
curr.x = curr.x + xMod
curr.z = curr.z + zMod
self.cone:SetPosition(curr, true)

curr = self.cam:GetPosition(true)
curr.x = curr.x + xMod
curr.z = curr.z + zMod
self.cam:SetPosition(curr, true)

 

The cone go through the walls. What am I doing wrong?

[AggrorJorn]

If you use SetPosition, it is important to make the distinction between object movement en physics movement. When you move with setposition, physics are ignored. Have a look at this one: PhysicsSetPosition();

[cassius]

I think you have to set the physics type and mass for the player too, in order to get collision.

[codeape]

Thanks Aggror and cassius

 

Tried PhysicsSetPosition() and added physics type Entity.RigidBodyPhysics and mass 1. Now it works but the movement is not very smoth like when I used SetPosition. I need to trim this

[codeape]

Ahhha I probably need to do my things in Entity::UpdatePhysicsHook and Entity::UpdateHook() to get things smooth:

 

http://www.leadwerks.com/werkspace/page/documentation/_/command-reference/entity/entityupdatephysicshook-r62

 

How do I set a Hook on a Entity?

[codeape]

Ok, added this to App.lua

 

function App:UpdatePhysics()
   System:Print("Hook 1")
   local curr = self.cone:GetPosition(true)
   curr.y = self.camDist
   self.cam:SetPosition(curr, true)
end

 

According to the Scripts reference: "This function will be called once per physics step."

http://www.leadwerks.com/werkspace/page/documentation/_/script-reference/

 

However it looks like it is never called. What am I missing?

[bandrewk]

Ahhha I probably need to do my things in Entity::UpdatePhysicsHook and Entity::UpdateHook() to get things smooth:

 

http://www.leadwerks.com/werkspace/page/documentation/_/command-reference/entity/entityupdatephysicshook-r62

 

How do I set a Hook on a Entity?

 

Correct me if I'm wrong but I'd say you have those hooks automatically in LUA. When you create a new script it seems to contain all hooks:

 

--[[
function Script:Start()

end
]]--
--[[
function Script:UpdateMatrix()

end
]]--
--[[
function Script:UpdateWorld()

end
]]--
--[[
function Script:UpdatePhysics()

end
]]--
--[[
function Script:Collision(entity, position, normal, speed)

end
]]--
--[[
function Script:Draw()

end
]]--
--[[
function Script:DrawEach(camera)

end
]]--
--[[
function Script:Release()

end
]]--
--[[
function Script:Cleanup()

end
]]--

 

You just have to un-comment and use them

[codeape]

I got it to work now =)

 

function Script:Start()
   --Player movement speed
   self.moveSpeed = 0.2
   -- Camera distance from player
   self.camDist = 10
   -- 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)
end
function Script:UpdatePhysics()
   local window = Window:GetCurrent()
   local context = Context:GetCurrent()
   -- Player keyboard input
   local xMod = 0;
   if window:KeyDown(Key.D) then
       xMod = 1 * Time:GetSpeed() * self.moveSpeed
   elseif window:KeyDown(Key.A) then
       xMod = -1 * Time:GetSpeed() * self.moveSpeed
   end
   local zMod = 0
   if window:KeyDown(Key.W) then
       zMod = 1 * Time:GetSpeed() * self.moveSpeed
   elseif window:KeyDown(Key.S) then
       zMod = -1 * Time:GetSpeed() * self.moveSpeed
   end
   -- Move player
   local curr = self.entity:GetPosition(true)
   curr.x = curr.x + xMod
   curr.z = curr.z + zMod
   self.entity:SetPosition(curr, true)
   -- Move camera
   curr.y = self.camDist
   self.cam:SetPosition(curr, true)
end

 

I did some other changes. Like not creating my player Entity (a box) in code (for now). And I changed the physics mode to "Character Controller" (the Collition type is "Character" also but I do not think that maters for the problems I had).

 

I also moved all code from App.lua to it's own script that is attached to the player Entity.