EffectComposer - Retrieve the visual output produced by the Composer

Hey there,

I've encountered an issue with the EffectComposer that I could use some help with.

Here's what I'm attempting to do: I'm working on dividing up the post-processing effects in my App across different EffectComposers. My goal is to calculate 5 shaders in EffectComposer1, then take the resulting image and pass it as a uniform into another EffectComposer, say EffectComposer2. The geometry and texture used in EffectComposer1 are both compatible, pixel-size wise, with the uniform needed in EffectComposer2.

As far as I'm aware, the EffectComposers' write/readBuffer should contain the texture that would be rendered to the screen if no effect is set to renderToScreen = true;.

If you require any additional information to help resolve this issue, please don't hesitate to ask.

Thanks, Michael

Using three.js r82

javascriptthree.js

Answer №1

And that's a wrap!

After some tweaking and submitting an issue on GitHub, I managed to resolve the problem at hand.

I'm sticking with this solution for now as it's working perfectly.

Below is the code snippet I used to generate my texture:

const canvasElement = document.getElementById("CanvasOne"); // Access the filled canvas
const texture = new THREE.CanvasTexture(canvasElement); // Create the texture

// Configure the texture filters
texture.magFilter = THREE.LinearFilter;
texture.minFilter = THREE.LinearFilter;
texture.generateMipmaps = false; // Disable mipmaps to prevent image distortion

Now, I can utilize texture as a uniform in my project.

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