» Tutorial Effects - Pixelshader Preparations
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Tutorial Effects - Pixelshader Preparations

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TOC: Of Effects and Shaders
Next: Manipulating Colors


For all the pixelshader examples we are using the same basic patch setup featuring a 2x2 Grid (EX9.Geometry) and a FileTexture (EX9.Texture) connected to an effect and the renderers View Transform scaled by two so that the grid fills the whole view:

Instead of the Template node in the patch we always clone us a new effect as described on the effects page. Connect your newly cloned effect as shown in the patch and open the CodeEditor via a rightclick on the node. Then take the code below and replace it with the templates code as this one is even more simplified leaving out the vertexshader portions which we don't need for now.

//texture
texture Tex <string uiname="Texture";>;
sampler Samp = sampler_state    //sampler for doing the texture-lookup
{
    Texture   = (Tex);          //apply a texture to the sampler
    MipFilter = LINEAR;         //sampler states
    MinFilter = LINEAR;
    MagFilter = LINEAR;
};
 
//the data structure: "vertexshader to pixelshader"
//used as output data with the VS function
//and as input data with the PS function
struct vs2ps
{
    float4 Pos  : POSITION;
    float2 TexCd : TEXCOORD0;
};
 
float4 PS(vs2ps In): COLOR
{
    return 1;
}
 
technique TSimpleShader
{
    pass P0
    {
        VertexShader = null;
        PixelShader  = compile ps_2_0 PS();
    }
}

Press CTRL+S to save/compile the code. No errors should show up. If you get an error at this point make sure you really copied everything and your code in the editor looks exactly as pictured above.


Next: Manipulating Colors
TOC: Of Effects and Shaders

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Shoutbox

~1h ago

levi: Any one knows of solutions for large touch surfaces (fingers)? 5 meters or so ?

~1d ago

CeeYaa: https://www.youtube.com/watch?v=OkzfYQCLrCE thanks for the insights, impressive stuff @mediadog yes, it is a very nice CAVE

~2d ago

mediadog: @CeeYaa Why I'm learning Unreal, now if I could just afford wrap-around LED walls! Can do in vvvv too, it's just a CAVE

~2d ago

kleinkariert: @tonfilm any hint on how to generate Mel-Frequency images out of audio for mel-GAN in v4

~2d ago

joreg: @mediadog we're aware of this, see: https://discourse.vvvv.org/t/visual-c-2008-this-download-is-no-longer-available/17895 and i now also fixed the resp. links on the download page.

~2d ago

mediadog: FYI VC redist 2008 links bad in 38.1 installer and on web page

~4d ago

joreg: Reminder: Intro workshop to the all-new vvvv this Tuesday before the #vvvv meetup in #berlin. Signup here: https://nodeforum.org/announcements/2020-series-of-2h-introduction-workshops-to-vvvv-gamma/

~4d ago