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Adding effects to 2D panels #479722
04/20/20 14:32
04/20/20 14:32
Joined: Feb 2013
Posts: 122
Maysville, Ga
Evo Offline OP
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Evo  Offline OP
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Joined: Feb 2013
Posts: 122
Maysville, Ga
I'm currently working on an (open-source) lightweight 2D game development library. Basically it's a lite-c plugin full of command methods that will have all the features needed to quickly and easily create 2D games. So far everything is going very well and it currently includes : Topdown Gameplay, Platformer Gameplay, New 2D collision system, 2D Simulated Camera System, Parallax background/Foreground system, and many other easy to use 2d features.

I'm now creating various other features and there are some things I would like to add but am unsure how to actually code.

I need to know if there's a way to add special effects to panel/bmaps.
* Is there a way to apply a shader to a pure 2d object. (Panels/Bmaps) (No 3D Level) (No 2D View Entities)
* If I wanted a panel to have a waving effect (Such as being underwater or other similar ideas), how would I code/apply those things to actually affect the panel/bmap?
* Does anyone have a working 2d shader or working code effect that alters/affects a 2d panel/bmap?


Last edited by Evo; 04/21/20 15:16.
Re: Adding effects to 2D panels [Re: Evo] #479724
04/20/20 14:47
04/20/20 14:47
Joined: May 2009
Posts: 5,276
Caucasus
3run Online
Senior Expert
3run  Online
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Joined: May 2009
Posts: 5,276
Caucasus
Hey!

Long time ago, txesmi helped me out with adding postprocessing shader over panels, maybe it will be useful:
Postprocessing over panels

Best regards!


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Re: Adding effects to 2D panels [Re: 3run] #479726
04/20/20 15:32
04/20/20 15:32
Joined: Feb 2013
Posts: 122
Maysville, Ga
Evo Offline OP
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Evo  Offline OP
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Joined: Feb 2013
Posts: 122
Maysville, Ga
Thanks, 3run.

It's good to know that there's a way to target panels with a material effect. I'm not very good with shader code, but this will give a great starting point for experimenting with some new ideas.

Re: Adding effects to 2D panels [Re: Evo] #479736
04/21/20 14:15
04/21/20 14:15
Joined: Feb 2013
Posts: 122
Maysville, Ga
Evo Offline OP
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Evo  Offline OP
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Joined: Feb 2013
Posts: 122
Maysville, Ga
I just can't seem to get that code to work the way I need it to. I think I need an actual 2d shader for testing it.

2D MATERIAL EFFECT (Need a real 2d shader)
It needs to be applied and to add the material effect to the panels bmap/window of the panel that's targeted.
(Something that actually affects the panels image automatically once applied.

It would be greatly appreciated If anyone with knowledge of this can create a basic working example.

If I use :
bmap_process ( sprite_A, player_pan.target_map, mtlEffect );
How do I target a panels (bmap/window sprite) and apply the effect directly to the image?
How can I get the view materials to work with this method?

Last edited by Evo; 04/21/20 18:29.
Re: Adding effects to 2D panels [Re: Evo] #479740
04/21/20 19:16
04/21/20 19:16
Joined: Feb 2013
Posts: 122
Maysville, Ga
Evo Offline OP
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Evo  Offline OP
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Joined: Feb 2013
Posts: 122
Maysville, Ga
I seem to have gotten it to work in a different way. Basically all I have to do to target a defined BMAP and apply a view shader is :

bmap_process ( sprite_A, sprite_A, mtl_emboss );

It applies the material effect to the BMAP. Changes apply to any panels using the BMAP.

Q. What material code do I use to make the sprites transparent?
When applied to a window sprite, it colors the transparent pixels.

(Note : Not all view material work since they don't seem to be set up for this purpose. Only certain materials like "Negative" seem to work, but transparency is not correct.)

Last edited by Evo; 04/21/20 20:44.
Re: Adding effects to 2D panels [Re: Evo] #479741
04/21/20 21:38
04/21/20 21:38
Joined: Oct 2008
Posts: 673
Germany
Ayumi Offline
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Ayumi  Offline
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Joined: Oct 2008
Posts: 673
Germany
maybe you should write your own small Shader because of controlling.

Example: Set alpha to View-Bitmap (clear the bitmap)

Code

Texture TargetMap;

sampler2D SrcColor = sampler_state
{ 
	texture = <TargetMap>; 
	MinFilter = linear;
   MagFilter = linear;
   MipFilter = linear;
   AddressU = Clamp;
   AddressV = Clamp;	
};

float4 FillAlpha( float2 texCoord : TEXCOORD0 ) : COLOR0
{
	float4 color;

	color = tex2D(SrcColor, texCoord);
	color.a = 0;
	color.rgb = 1;
	return color;
}

technique PostProcess 
{
	pass p1 
	{
		AlphaBlendEnable = false;	
		VertexShader = null;
		PixelShader = compile ps_1_0 FillAlpha();
	}
}


MATERIAL* MatObjFillAlpha =
{	
	effect ="FillAlpha.fx";		
}



Code

View.bmap = bmap_for_entity(my, 1);
bmap_process (View.bmap, NULL, MatObjFillAlpha);




And your bmap_process is wrong, set NULL to Source.




If you want to set Alpha Channel to Emboss, set AlphablendEnable to true and set Color.a

Code
Texture TargetMap;
sampler2D g_samSrcColor = sampler_state { texture = <TargetMap>; MipFilter = Linear;	};

float4 vecViewPort;

float4 postprocessing_emboss( float2 Tex : TEXCOORD0 ) : COLOR0 
{
   float4 Color = float4(0.5,0.5,0.5,1.0);
	Color -= tex2D( g_samSrcColor, Tex.xy-vecViewPort.zw)*2.0f;
	Color += tex2D( g_samSrcColor, Tex.xy+vecViewPort.zw)*2.0f;	
	Color.rgb = (Color.r+Color.g+Color.b)/3.0f;
	Color.a = 0.2; 
	return Color;
}

technique PostProcess 
{
	pass p1 
	{
		AlphaBlendEnable = true;
		VertexShader = null;
		PixelShader = compile ps_2_0 postprocessing_emboss();
	}
}





Last edited by Ayumi; 04/21/20 21:49.
Re: Adding effects to 2D panels [Re: Evo] #479742
04/21/20 23:01
04/21/20 23:01
Joined: Feb 2013
Posts: 122
Maysville, Ga
Evo Offline OP
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Evo  Offline OP
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Joined: Feb 2013
Posts: 122
Maysville, Ga
Hi, Ayumi. Thanks for your reply and your help.

My project doesn't use 3D levels, views, or entities. It's also not drawing into anything. It's pure 2D and it's just a lot of panels and bmaps.

Calling NULL in "bmap_process( sprite_A, NULL, mtl_emboss );" won't work. It has to be set to the same thing so that the effect applies to the same bmap that is being targeted.

bmap_process ( sprite_A, sprite_A, mtl_emboss ); This is all that's needed to apply a material to a defined bmap. My issue is that I know very little about coding shaders.

Re: Adding effects to 2D panels [Re: Evo] #479747
04/22/20 10:43
04/22/20 10:43
Joined: Jul 2007
Posts: 570
Turkey, izmir
Emre Offline
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Emre  Offline
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Joined: Jul 2007
Posts: 570
Turkey, izmir
Originally Posted by Evo
(Note : Not all view material work since they don't seem to be set up for this purpose. Only certain materials like "Negative" seem to work, but transparency is not correct.)


In that effect (Negative), transparency is indicated by number. That's the problem.

Code
float4 postprocessing_negative( float2 Tex : TEXCOORD0 ) : COLOR0 
{
   //you have the color of the texture but not the alpha!
   float3 Color = 1. - tex2D( g_samSrcColor, Tex.xy).xyz;
   
   //you set the alpha by number (1) that means your texture doesn't have transparent parts.
   return float4(Color,1.);
}



If you change it like this, the problem will disappear:

Code
float4 postprocessing_negative( float2 Tex : TEXCOORD0 ) : COLOR0 
{
	//you have the color and alpha of the texture.
	float4 Color = tex2D( g_samSrcColor, Tex.xy);
	
	//now you change colors, but not touch the alpha.
	Color.xyz=1. - tex2D( g_samSrcColor, Tex.xy).xyz;
	
	return Color;
}


Color.xyz means rgb and Color.a means alpha. So if you specify the alpha in numbers float4(Color.xyz,1), it won't affect texture. First, you should get rgb and alpha with float4. Then you can change it as you wish.

I would like to help more, but i'm not familiar of bmap_process.

Re: Adding effects to 2D panels [Re: Evo] #479748
04/22/20 12:25
04/22/20 12:25
Joined: Feb 2013
Posts: 122
Maysville, Ga
Evo Offline OP
Member
Evo  Offline OP
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Joined: Feb 2013
Posts: 122
Maysville, Ga
Thanks, Emre. That solution works well and the transparency on the negative material looks great now.

bmap_process applies the selected material to a defined bmap. Then bmap_purge can quickly remove the edited version from memory which will make the bmap return to its original state. Doing it this way to add effects to bmaps seems to work well. At the moment I've only tested material that effects color changes.

I'll keep digging into some shader code and try to figure some thing's out. Thanks again for your help.

Re: Adding effects to 2D panels [Re: Evo] #479749
04/22/20 13:19
04/22/20 13:19
Joined: Feb 2013
Posts: 122
Maysville, Ga
Evo Offline OP
Member
Evo  Offline OP
Member

Joined: Feb 2013
Posts: 122
Maysville, Ga
My evo2d method library will now have a custom 2D FX system for material effects.

So far it's only standard material effects that alter the color. But now I need a final test of a shader that alters shape or some other cool effect.

If anyone can create a basic effect to alter the shape (such as a wave effect that changes the bmap), that would verify if a real effect works or not. Sorry to ask for help in creating it, but I know little about shader code at this time.

Thanks for everyone's help so far. I appreciate your time and effort.

Last edited by Evo; 04/22/20 14:59.
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