Entity::SetInput, maxrotationspeed

[psychoanima]

I don't know how to set maxrotationspeed for SetInput and to avoid ultra fast body turn. I read in API reference that maxrotationspeed is in degrees per physics step, but I still don't understand which number is giving slower rotation?

[psychoanima]

Or most likely I misunderstood this parameter. What is actually rotating, some example maybe?

[macklebee]

Honestly, I do not think that has been fully implemented as I never saw any difference in behavior from a max rotation speed between 5000 or 0.0005. What you can do is control how fast the angle value is changed to the final amount.

 

example:

angle = player:GetRotation(true).y --defined before main loop

move = 0

strafe = 0

jump = 0

crouch = false

maxaccel = 1

maxdecel = 0.5

detailed = false

maxrotationspeed = 0.5

..

..

--Main Loop

p_rot = player:GetRotation(true)

if window:KeyHit(Key.Right) then angle = 270 end

if window:KeyHit(Key.Left) then angle = 90 end

finalangle = Math:CurveAngle(angle, p_rot.y, 10) --decrease step to quicken rotation

player:SetInput(finalangle,move,strafe,jump,crouch,maxaccel,maxdecel,detailed,maxrotationspeed)

[psychoanima]

Honestly, I do not think that has been fully implemented as I never saw any difference in behavior from a max rotation speed between 5000 or 0.0005. What you can do is control how fast the angle value is changed to the final amount.

 

example:

angle = player:GetRotation(true).y --defined before main loop

move = 0

strafe = 0

jump = 0

crouch = false

maxaccel = 1

maxdecel = 0.5

detailed = false

maxrotationspeed = 0.5

..

..

--Main Loop

p_rot = player:GetRotation(true)

if window:KeyHit(Key.Right) then angle = 270 end

if window:KeyHit(Key.Left) then angle = 90 end

finalangle = Math:CurveAngle(angle, p_rot.y, 10) --decrease step to quicken rotation

player:SetInput(finalangle,move,strafe,jump,crouch,maxaccel,maxdecel,detailed,maxrotationspeed)

 

 

That's really cool idea for rotation, thanks!

 

Do you think it can be easily implemented with the script bellow:

 

http://www.leadwerks.com/werkspace/topic/12651-2d-platformer-player-script-example/page__hl__platformer

 

(I am using the same logic like in function Script:UpdatePhysics() )

[psychoanima]

Math:CurveAngle() works perfect for my rotation need.

 

Now I have another problem. My character is moving on X and Z axis but needs to stay locked on Z and to move only on X.

 

 

I read in one post this method for locking:

 

(in function Script:Start())

vec = self.entity:GetPosition()]

 

&

 

( in function Script:UpdateWorld())

self.entity:PhysicsSetPosition(0,0,vec.z)

 

 

 

but nothing is changing in the viewer, it's still floating on Z

[macklebee]

You should be able to just set the position (using entity:SetPosition) to align on whatever value for Z that you would want. Just perform it prior to the SetInput().

 

An example on one way to perform this:

window = Window:Create("Example", 0, 0, 800, 600,257)

context = Context:Create(window)

world = World:Create()

camera = Camera:Create()

camera:SetDebugPhysicsMode(true)

camera:SetPosition(0,6,0)

camera:SetRotation(90,0,0)

light = DirectionalLight:Create()

light:SetRotation(35,35,0)

 

ground = Model:Box(10,1,10)

ground:SetPosition(0,-0.5,0)

ground:SetColor(0.6,1,0.6)

shape = Shape:Box(0,0,0, 0,0,0, 10,1,10)

ground:SetShape(shape)

shape:Release()

ground:SetCollisionType(Collision.Scene)

 

player = Model:Load("Models/characters/crawler/crawler.mdl")

player:SetCharacterControllerAngle(180)

player:SetPhysicsMode(Entity.CharacterPhysics)

player:SetCollisionType(Collision.Character)

player:SetPosition(0,0,2.5)

player:SetMass(10)

 

angle = player:GetRotation(true).y

Zpos = player:GetPosition(true).z

move = 0

 

while not window:KeyHit(Key.Escape) do

if window:Closed() then return false end

 

move = 0

if window:KeyDown(Key.Left) then

angle = 90

move = 3

end

if window:KeyDown(Key.Right) then

angle = -90

move = 3

end

 

p_pos = player:GetPosition(true)

if math.abs(p_pos.z-Zpos)>0.01 then player:SetPosition(p_pos.x,p_pos.y,Zpos) end

 

p_rot = player:GetRotation(true)

finalangle = Math:CurveAngle(angle, p_rot.y, 3)

player:SetInput(finalangle,move,0,0,false,1,0.5,false,5.0)

 

Time:Update()

world:Update()

world:Render()

 

context:SetBlendMode(Blend.Alpha)

context:DrawText("Press LEFT/RIGHT arrow keys to move",2,2)

context:DrawText(string.format("Player Z Position: %.1f",p_pos.z),2,22)

context:DrawText(string.format("Player Angle: %.1f",player:GetRotation(true).y),2,42)

context:SetBlendMode(Blend.Solid)

context:Sync(true)

end

[psychoanima]

p_pos = player:GetPosition(true)

if math.abs(p_pos.z-Zpos)>0.01 then player:SetPosition(p_pos.x,p_pos.y,Zpos) end

 

 

 

Thanks!

 

That solved my problem!

 

 

However, because my camera is attached to the character, during rotation camera shakes.

 

I solve that like this:

 

 

function Script:Start()

self.camera = Camera:Create()

self.cameraZ = self.camera:GetPosition().z

self:UpdateCamera()

end

 

 

function Script:UpdateCamera()

self.camera:SetRotation(35,0,0)

self.camera:SetPosition(self.entity:GetPosition().x,self.entity:GetPosition().y, self.cameraZ )

self.camera:Move(0,0,-120)

 

end

 

 

 

I don't know if there is easier or more clean way to do this, but it works.