first post here...how to swap object, textures, material or shader???

[10shu]

Hi,

 

This is my first post here. I hope I wont break any rules of this forum...I apologize right now in case i do...

 

I m a 40 year old game dev. I m mostly an artist although I ve got some tech knowledge.

and yes, english isnt my primary language...

 

I m currently working for a big game publisher, but I always have few games project at home I work on my free time. some of which i complete other end up just being test...

 

Anyhow, I ve started to play around with LeadWerks, And I love it...However I have zero Lua knowledge.

A friend programmer will help me later on when he is done in is current project but for now I m on my own.

 

I Followed the tutorials, and I did tweaked few script to do what I need so far but I reached an wall last night...

 

So this is my Issues:

 

-I ve got that lamp in my level. (something like this:

https://s7d2.scene7.com/is/image/BedBathandBeyond/5612514187030p?229$ )

 

-where the light buld is I ve added an omnie

 

-Ive set the lamp object so it do not cast shadow.

 

-To simulate the light going through the lamp shade I ve added on self illum material.

 

-Finally I ve added a activator script on the omnie and a switch button script on the light switch

 

 

OK, so this work fine...the light look nice when it s switched on.

and the button let me switch it off...

However, when my light is turned off I still have the shade self illum

 

Is there a script somewhere That would I could add to my lamp shades so I can change the shaders, or swap the object, or change the textures loaded into the material???

 

Thanks

[AggrorJorn]

At the moment you switch the light on/off in the script you can either set a new material or set a new texture in the current material.

http://www.leadwerks.com/werkspace/page/api-reference/_/entity/entitysetmaterial-r183

http://www.leadwerks.com/werkspace/page/api-reference/_/material/materialsettexture-r184

 

If you post your light script we can help you even better.

[10shu]

At the moment you switch the light on/off in the script you can either set a new material or set a new texture in the current material.

http://www.leadwerks.com/werkspace/page/api-reference/_/entity/entitysetmaterial-r183

http://www.leadwerks.com/werkspace/page/api-reference/_/material/materialsettexture-r184

 

If you post your light script we can help you even better.

 

Thank s for that...I ll check those link tonite, And will post more here if I cannot make it work

[10shu]

OK So after many tried, and a lot of copy and paste from other script i finally managed to do something...

Dont get me wrong it dont work but I ve made progress...

 

So this is what I ve got:

 

I ve managed to load 2 materials.( Well I m sure the first one is loaded)

and to add the toggle for the flowgraph editor.

 

 

So my script is attached to the entity and in the flowgraph editor and it s linked to the switch light button

 

However when I press the button the script crash with this error

 

44 : attempt to index field 'setMaterial' (a nil value)

 

function App:Start()


--Create a material
local material1 = Material:Load("Materials/Concrete/concrete_clean.mat")
local material2 = Material:Load("Materials/Concrete/concrete_dirty.mat")

--Load and apply a shader
local shader = Shader:Load("Shaders/Model/diffuse.shader")
material:SetShader(shader)
shader:Release()

--Create a model and apply the material
-- local model = Model:Sphere()
-- model:SetMaterial(material)
-- model:SetPosition(0,0,2)

return true
end

function App:Loop()

if self.window:Closed() or self.window:KeyHit(Key.Escape) then return false end

Time:Update()
self.world:Update()
self.world:Render()
self.context:Sync()

return true
end


--function ToggleMaterial ()

-- end

function Script:ToggleMaterial()--in
if not self.entity.setMaterial:Hidden() then
if (state == 0) then
self.setMaterial(materialOn)
else self.setMaterial(materialOff)
state = not state
end
end
end

 

What do I do wrong?

Please keep in mind I dont know programing. I ve started with what you provided to me.. and added on top of it...Although I kind of understand what the script is doing I still find it difficult to fully understand everything here... so they maybe some really noob stupid thing here

 

Thanks.

 

ohh and you asked for it so, this is the script I used for the light: (but maybe at tihs point its not nessesary anymore?)

 

-- activate light
function Script:Activate()--in
if self.entity:Hidden() then
self.entity:Show()
self.component:CallOutputs("Activate")
end
end
-- deactivate light
function Script:Deactivate()--in
if not self.entity:Hidden() then
self.entity:Hide()
self.component:CallOutputs("Deactivate")
end
end
-- toggle light
function Script:Toggle()--in
if not self.entity:Hidden() then
self:Deactivate()
else
self:Activate()
end
end

 

 

got it from this forum.

work great!

I used part of it to add the toggle part of my material script.

 

Thanks again for you help

[AggrorJorn]

First off: it is good that you are trying yourself. So hats of to you.

 

Secondly: I would not recommend altering the app.lua script for the following reasons:

• The behaviour you are looking for is entity related. The app lua is about managing the game loop.
  
• The app,lua is soon to be deprecated. If you really must alter the main loop, use main.lua.
  

 

Thirdly: so this is your setup right: You have a lamp and you have a light.

 

The light still has this script:

-- activate light
function Script:Activate()--in
if self.entity:Hidden() then
self.entity:Show()
self.component:CallOutputs("Activate")
end
end
-- deactivate light
function Script:Deactivate()--in
if not self.entity:Hidden() then
self.entity:Hide()
self.component:CallOutputs("Deactivate")
end
end
-- toggle light
function Script:Toggle()--in
if not self.entity:Hidden() then
self:Deactivate()
else
self:Activate()
end
end

 

The lamp model has a new script attached. Drag both items into the flowgraph editor and you can hook them up. You can also use a toggle function instead of 2 separate functions.

Script.material1;
Script.material2;

function Script:Start()
self.material1 = Material:Load("Materials/Concrete/concrete_clean.mat")
self.material2 = Material:Load("Materials/Concrete/concrete_dirty.mat")
end

-- Set material 1
function Script:Material1()--in
self.entity:SetMaterial(self.material1)
end


-- Set material 1
function Script:Material2()--in
self.entity:SetMaterial(self.material2)
end

[10shu]

I m sorry but its not working.

I must be doing something wrong.

 

Got this error message:

 

: 1 : '=' expected near ';'

 

it s this line : Script.material1;

I try to add a = but it do not work.

so I hided those lines

 

--Script.material1;
--Script.material2;
function Script:Start()
self.material1 = Material:Load("Materials/Concrete/concrete_clean.mat")
self.material2 = Material:Load("Materials/Grass/Grass01.mat")
end-- Set material 1
function Script:Material1()--in
self.entity:SetMaterial(self.material1)
end

-- Set material 1
function Script:Material2()--in
self.entity:SetMaterial(self.material2)
end

 

my flowcharts look like this now:

 

Lightswitch:PushButton -> its the light switch object.

Box 3:set textures -> its should be the lampshade currently it s a test cube, the new script you gave me is applied to this object.

SpotLight4 :activate -> the spot light I turn on when I switch on

 

I try to look into a 2 node solution but I dont see how that would work.?!

[AggrorJorn]

Sorry, C# programmer by day.

 

Replace those first two lines with:

Script.material1 = nil
Script.material2 = nil

 

If this does not work, you send me your project and I will have a look.