changing state of post-process shader by code

[Christian Clavet]

Hi! Is there a method (preferably LUA if possible) to enable/disable some of the post-process shaders that are used in a map. I don't seem to find something that is related to that in documentation.

I would like to use that so that in the settings menu, I could offer a way to disable/enable "FX's" to keep game performance on lower end hardware...

[gamecreator]

You can use the camera functions like AddPostEffect and ClearPostEffects.  I don't code Lua but it should work there too.
https://www.leadwerks.com/learn.php?page=API-Reference_Object_Entity_Camera

 

[Christian Clavet]

Thanks. Exactly what I was looking for!

[Russell]

On 7/9/2017 at 7:28 PM, Christian Clavet said:

Thanks. Exactly what I was looking for!

I'm new in LUA, im trying to do this. Any tip i can follow to code ENABLE/DISABLE Shaders. I'm trying enable/disable WOBBLE.SHADER when i go out of water or underwater.

I have readed gamecreator link about entity camera:

On 7/9/2017 at 7:25 PM, gamecreator said:

You can use the camera functions like AddPostEffect and ClearPostEffects.  I don't code Lua but it should work there too.
https://www.leadwerks.com/learn.php?page=API-Reference_Object_Entity_Camera

 

And i tried  encoding myself script with AddPostEffect command, but i don't know how use it.

Any tip or code example to see the sintax???

Thank you very much.

[Josh]

It would be like camera:AddPostEffect("Shaders/PostEffects/nameofshader.shader")

[Russell]

1 hour ago, Josh said:

It would be like camera:AddPostEffect("Shaders/PostEffects/nameofshader.shader")

Thanks for your answer Josh. But my problem is how encode that line in a Script. If I write that command in my own script appears error of nil value.

My case using the flowgraph is this:

I've got a box (called Trigger_EnableDisableWobble) with texture Trigger, with Physics Trigger and Script collision trigger.lua.

How and where can I encode the line addposteffect when our character touches the trigger to add that shader?

Thanks for help.

[Josh]

Well, you need a variable where your camera is. What script is in this? Can you post some of your code?

[Russell]

3 hours ago, Josh said:

Well, you need a variable where your camera is. What script is in this? Can you post some of your code?

I don't have any camera on the map. Only de FPSPlayer.prefab of our character.

This is my code for CollisionTrigger... Is the default of Leadwerks...

function Script:Start()
	self.enabled=true
end

function Script:Collision(entity, position, normal, speed)
	if self.enabled then
		self.component:CallOutputs("Collision")
	end
end

function Script:Enable()--in
	if self.enabled==false then
		self.enabled=true
		--self:CallOutputs("Enable")
	end
end

function Script:Disable()--in
	if self.enabled then
		self.enabled=false
		--self:CallOutputs("Disable")
	end
end

Any hint of how encode camera:AddPostEffect line???

I have tried this:

function Script:Collision(entity, position, normal, speed)
	if self.enabled then
		self.component:CallOutputs("Collision")
		self.camera:AddPostEffect("Shaders/PostEffects/wobble.shader")
	end
end

And in have tried this too in the same script:

function Script:Render(camera, context, buffer, depthtexture, diffusetexture, normaltexture)
	camera:AddPostEffect("Shaders/PostEffects/wobble.shader")
end

It doesn't work...

I don't know how encode this...

[Josh]

Without having tried it, I think you need something like this:

function Script:Collision(entity, position, normal, speed)
	if self.enabled then
		if entity.script ~= nil then
			if entity.script.camera ~= nil then
				entity.script.camera:AddPostEffect("Shaders/PostEffects/wobble.shader")
		        self.enabled = false
			end
		end
	end
end

 

[Russell]

2 hours ago, Josh said:

Without having tried it, I think you need something like this:

function Script:Collision(entity, position, normal, speed)
	if self.enabled then
		if entity.script ~= nil then
			if entity.script.camera ~= nil then
				entity.script.camera:AddPostEffect("Shaders/PostEffects/wobble.shader")
		        self.enabled = false
			end
		end
	end
end

  

I will say something that many people will tell you in the forum:
"I love you Josh!! I love you buddy!!"

It works!! Thank you very much!!

You have saved my day

[Russell]

3 hours ago, Josh said:

Without having tried it, I think you need something like this: 

function Script:Collision(entity, position, normal, speed)
	if self.enabled then
		if entity.script ~= nil then
			if entity.script.camera ~= nil then
				entity.script.camera:AddPostEffect("Shaders/PostEffects/wobble.shader")
		        self.enabled = false
			end
		end
	end
end

 

I have now 2 collisions scripts differents for the Water area. One for ENABLE (thanks @Josh) wobble.shader effect, and another one for DISABLE it with ClearPostEffects()

This is the result:

Many thanks team!!

Im very newbie with LUA, and sometimes one simple line of code takes me a long time to achieve my objetive.