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TX Filtering/Quality Issue

by Christian Rousselle · in Torque X 2D · 07/13/2008 (3:52 pm) · 6 replies

Hi,

I have a problem with TX and filtering/sampling. The first screenshot shows TX with linear sampling (default in SimpleEffect.fx) - in this case the graphics (background/ship) look blurry.

www.codecoach.de/GG/tx/TX_LinearSampling.png
The second screenshot shows the same scene with point filtering (changed MipFilter, MinFilter, MagFilter to POINT in SimpleEffect). This looks better. The problem is that when the ship is rotated is gets pixelated.

www.codecoach.de/GG/tx/TX_PointSampling.png
The third screenshot shows the same scene with TGB. This is what I want to achive in TX.

www.codecoach.de/GG/tx/tgb.png
Does anybody know how to achive this effect? I know I can set the background to POINT and only the ship to LINEAR but I would like to have the ship crips too.

Thanks.
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Torque Owner Christian Rousselle
Default Studio Name
#1
07/19/2008 (9:04 am)
The problem does not have to do with filtering but with DX not mapping Texels to Pixels "correctly" for 2D requirements (MS blog). To make it look as I expect I changed the code of the VertexShader in SimpleEffect.fx

VSOutput SimpleVS(VSInput input)
{
	VSOutput output;
	output.position = mul(input.position, worldViewProjection);

	output.texCoord.x = input.texCoord.x + 0.5 / 1024;
	output.texCoord.y = input.texCoord.y + 0.5 /  768;

	output.color = input.color;
	output.color.a *= opacity;
	return output;
}

The above assumes a resolution of 1024x768 but the current resolution should be passed to the shader.

I do not suspect that somebody knows how to tell TXB to accept customer materials? When I create a customer material and replace it in the scenes XML file it works and is used when starting from Visual C#.

<Materials>
        <MyMaterial name="Level_01_01Material" type="MyNameSpace.Materials.MyMaterial">
            <TextureFilename>data/images/World_01/Level_01/Level_01_01.png</TextureFilename>
            <IsTranslucent>false</IsTranslucent>
            <IsAdditive>false</IsAdditive>
        </MyMaterial>
    </Materials>

But when I load the scene and save it again in TXB it is replaced by SimpleMaterial:

<Materials>
        <SimpleMaterial name="Level_01_01Material" type="GarageGames.Torque.Materials.SimpleMaterial">
            <TextureFilename>data/images/World_01/Level_01/Level_01_01.png</TextureFilename>
            <IsTranslucent>false</IsTranslucent>
            <IsAdditive>false</IsAdditive>
        </SimpleMaterial>
    </Materials>

Torque Owner Charlie Talley
#2
06/30/2009 (7:33 pm)
So...for those of us without the source code...is there any way to implement this fix for blurriness?

Torque Owner Brian
#3
07/02/2009 (12:38 pm)
Added to community links. Thanks Christian!

Brian

Torque Owner Christian Rousselle
Default Studio Name
#4
07/02/2009 (2:03 pm)
Hi. I am not 100% sure but I think it should be possible for people without the source to write their own shader and change/create the material.

In the code I posted above I used a resolution of 1024x768. You have to adjust this to the resolution you use. The best way would be to pass the current resolution to the shader.

Torque Owner Charlie Talley
#5
07/03/2009 (2:35 am)
I know the EULA says no sharing of source code to non-pro licensors, but does a simple shader count? I would like to just get this shader file and make the quick fix. If not, is it possible to get some info on the needed data bindings to write a replacement simple shader? Can someone from GG chime in? My game is using a lot of sprites, and I would like them as sharp as possible, even at the expense of some anti-aliasing. Thanks.

Torque 3D Owner Aaron Scovel
#6
05/26/2011 (12:45 am)
FYI for new TX users, this has been fixed in CEV4. I have verified this solution does indeed work (for any of your non CEV projects).