Script to make boat sail

[DanceTweety]

This is the example of how to do it but it is using a child box make in the script it self.

I want to us the child box as a motor so need a box where a can put the motor script in.

So how would I us a allready existing box in the Parenting script?

 

self.entity = Model:Box()

    local child = Model:Box(1,1,1)
    child:SetParent(self.entity)
    child:SetColor(1.0,0.0,0.0)
    child:SetPosition(2,-2,0)

    child = Model:Box(1,1,1)
    child:SetParent(self.entity)
    child:SetColor(0.0,1.0,0.0)
    child:SetPosition(-2,-2,0)

    return true

[xtreampb]

in your script for the motor, in the start function, self.entity:setParent(--[[entity for your boat]]--). this is eaiser to do in the editor. in the scene tab, click and drag your motor on top of your boat, you should see a plus or minus icon appear to the left of your boat and the motor is now offset and directly below your boat. It is now parented, congratulations.

[DanceTweety]

I did that to. Was one of the first things I tried. But the motor simply takes of even though it is in boat in the scene tab.

 

That is why I tried the script with the hinge you see at top of this post.

[DanceTweety]

Thanks for people that try to help. Was not much that worked but I figured it out my self in the end. This is how the code looks right now handy to know maybe for others:

 

 

Script.enabled = true --bool "Enabled"
Script.gravity = false --bool "Gravity"
Script.movespeed = 1 --Define self.movespeed
Script.originPosition = nil --Define self.originPosition
Script.currentPosition = nil --Define self.currentPosition
Script.oldMass = nil --Define self.oldMass
Script.window = Window:GetCurrent() --Define self.window
Script.move = Vec3(0,0,0) --Define self.move
Script.rotation = "" --Define self.rotation
Script.ry = 0 --Define self.ry
Script.speed = "" --Define self.speed
function Script:Start()
self.originPosition = self.entity:GetPosition() --Get position of object
self.oldMass = self.entity:GetMass() --Get mass of object
if self.entity:GetShadowMode()>0 then
self.entity:SetShadowMode(2)--Light.Dynamic
end

if self.enabled then
if self.entity:GetMass() == 0 then --Get mass and check if bigger then 0
Debug:Error("Entity mass must be greater than zero.")
end
else
self.entity:SetMass(0)
end
self.entity:SetGravityMode(self.gravity) --Set gravity to false
self.entity:SetFriction(0,1) --Set Friction
self.move = Vec3(0,0,0) --Set self.move to vector
end
function Script:UpdatePhysics() --Loop to update Physics
self.move = Vec3(0,0,0)
local movespeed = self.movespeed --Set movespeed to self.movespeed
self.rotation = self.entity:GetRotation():ToString() --Set self.rotation and make it a string (else it is userdata and will not work)
self.ry = string.sub(self.rotation,11,15) --Set self.ry with y of rotation (if cuts of x and z)
self.ry = tonumber(self.ry) --Set self.ry to be a number
self.ry = math.ceil(self.ry) --Set self.ry to be a round number
local inRadians = math.rad(self.ry) --Convert degrees to radians

if (self.window:KeyDown(Key.Up)) then self.move.x = -1 * movespeed * math.cos(inRadians) * Time:GetSpeed() end --Look if upper arrow key is pressed and Set value in selfmove.x (x-axis)
if (self.window:KeyDown(Key.Up)) then self.move.z = movespeed * math.sin(inRadians) * Time:GetSpeed() end --Look if upper arrow key is pressed and Set value in selfmove.z (z-axis)
if (self.window:KeyDown(Key.Down)) then self.move.x = movespeed * math.cos(inRadians) * Time:GetSpeed() end --Look if lower arrow key is pressed and Set value in selfmove.x (x-axis)
if (self.window:KeyDown(Key.Down)) then self.move.z = -1 * movespeed * math.sin(inRadians) * Time:GetSpeed() end --Look if lower arrow key is pressed and Set value in selfmove.z (z-axis)
if (self.window:KeyDown(Key.Right)) then self.move.y= movespeed * Time:GetSpeed() end --Look if right arrow key is pressed and Set value in selfmove.y (y-axis rotation)
		 if (self.window:KeyDown(Key.Left)) then self.move.y= -1 * movespeed * Time:GetSpeed() end --Look if left arrow key is pressed and Set value in selfmove.y (y-axis rotation)

self.entity:AddForce(self.move.x,0,0) --AddForce with the self.move.x value on x-axis
self.entity:AddForce(0,0,self.move.z) --AddForce with the self.move.z value on z-axis
self.entity:AddTorque(0,self.move.y*70,0) --AddTorque with the self.move.y value on y-axis (rotation)
Time:Update() --Update Time value
end

function Script:PostRender() --Function to print on game screen
local context=Context:GetCurrent()
context:SetBlendMode(Blend.Alpha) --Set blend to alpha so only letters will show
context:DrawText("Rotation :".. self.ry .."",5,130) --Set text and position of text
--context:DrawText("Speed :".. self.speed .."",5,140) --Set text and position of text
end