RTS style movement using lua? Not possible?

[Andy Gilbert]

Hi, im trying to work out how i can do 3D RTS similer style movement using LE and lua?

 

So far it appears impossible as i cant find a way to get the mosue coords in 3D?

 

Does anyone know how this could be done?

 

Cheers

Andy

[Rick]

I'm confused as to what you are asking?

 

Maybe look at CameraPick?

[Andy Gilbert]

Hi Rick, im probably confused myself, but i would have thought, in order to get a 3d object to move towards the mouse in 3d space? I need to know the 3d coords or the mouse?

 

How can i get them using lua?

 

Thanks

Andy

[Rick]

I think CameraPick should give you what you want. You use it to select your unit, then you use it to get a point (x,y,z) selected on terrain or model and that is where you move your unit to.

[macklebee]

http://www.leadwerks.com/werkspace/topic/1762-pointnclick/

[Andy Gilbert]

Spot on! I'll give it a go.

Thanks both

 

Andy

[Andy Gilbert]

Not sure what im doing wrong here?

 

This code below doesnt work but ALSO doesnt error:

local pick=CameraPick(fw.main.camera,Vec3(MouseX(),MouseY(),30.0),0,0) 
               if pick then 
                     object.cameraPivot:SetPosition(Vec3(pick.x,0,pick.z))
                     self.model:Point(object.cameraPivot,1,1) 
end

if i change the CameraPick Z value (above is 30) to anything below 30 it errors (Index for object is not valid field or method)

 

anything below doesnt error but also doesnt work?

 

Anyknow know why? This is used within the script of the object im trying to use.

 

Thanks

Andy

[macklebee]

without actually being able to see what is happening in the code, try:

local pick=CameraPick(fw.main.camera,Vec3(MouseX(),MouseY(),30.0),0,0) 
if pick~=nil then 
       self.cameraPivot:SetPosition(Vec3(pick.position.x,0,pick.position.z))
       self.model:Point(self.cameraPivot,1,1) 
end

[macklebee]

here is Gimpy's original version converted to lua:

--original bmx code by GIMPY 
require("Scripts/constants/engine_const")
RegisterAbstractPath("")        
Graphics(800,600)        
fw=CreateFramework() 

fw.main.camera:SetPosition(Vec3(0, 45, - 45))

light = CreateDirectionalLight()
light:SetRotation(Vec3(65, 45, 0))

piv = CreatePivot()

cube = CreateCube()

plane = CreatePlane()
plane:SetScale(Vec3(100,0.1,100))
plane:Paint(LoadMaterial("abstract::cobblestones.mat"))

while KeyHit(KEY_ESCAPE)==0 do        
fw.main.camera:SetPosition(Vec3(cube.position.x,cube.position.y+25,cube.position.z-25))
       fw.main.camera:Point(cube,3,1)
       if MouseDown(1)==1 then
               local pick = CameraPick(fw.main.camera, Vec3(MouseX(), MouseY(), 1000))
               if pick~=nil then
                       piv:SetPosition(Vec3(pick.position.x,.5,pick.position.z))
                       cube:Point(piv,3,1)
                       speed = 0.3
               end        
end
if EntityDistance(cube,piv)<1.2 then speed = 0 end
       cube:Move(Vec3(0,0,speed))

fw:Update() 
fw:Render()
Flip(1)
end

[Andy Gilbert]

Cheers Macklebee, spot on seems to be working fine now.

 

Thanks

Andy

[Andy Gilbert]

Although, i still cant work out why this flips my object around? It does a 180 roll for some reason but then works perfectly just upside down, exit game mode and it turns back around again?

 

this appears to be happeneing from the "point" command??

 

Any ideas?

 

Andy

[macklebee]

probably because you are rotating the model around the x-axis

self.model:Point(self.cameraPivot,1,1) 

try using the z-axis:

self.model:Point(self.cameraPivot,3,1) 

i did not know with your code above if that was intentional or not...