The EffectComposer in Three.js seems to be malfunctioning when combined with the Bloom

I'm completely stumped trying to troubleshoot the issue with these two mysterious .js files in my project. Despite the lack of documentation, I have implemented the EffectComposer and BloomPass and attempted to call them like this:

parameters = { bloomStrength: 1.3, bloomFactor: 1.0,}

var renderPass = new THREE.RenderPass(scene, camera);
var copyPass = new THREE.ShaderPass(THREE.CopyShader);
copyPass.renderToScreen = true;

composer = new THREE.EffectComposer ( renderer );
composer.addPass(renderPass);
composer.addPass(copyPass);

var effectBloom = new THREE.BloomPass ( 3, 25, 5, 256);
composer.addPass(effectBloom);

While BloomPass.js is throwing an error on its own (not in my code) stating "Uncaught TypeError: Cannot read property 'prototype' of undefined at BloomPass.js:76". Line 76 of BloomPass.js is as follows:

THREE.BloomPass.prototype = Object.assign( Object.create( THREE.Pass.prototype ), {

I suspect this is causing the error in the EffectComposer at the composer.addPass(effectBloom); line: Uncaught TypeError: pass.setSize is not a function at THREE.EffectComposer.addPass

pass.setSize( size.width, size.height );

Any insight into what I might be doing incorrectly? I've followed examples closely, so any assistance would be greatly appreciated!

javascriptthree.jspost-processingbloom

Answer №1

To achieve the desired effect, make sure the CopyShader is placed at the end of the composer, not in the middle. Below is an example of how this can be implemented successfully:

    renderer.autoClear = false;
    composer = new THREE.EffectComposer(renderer);
    var sunRenderModel = new THREE.RenderPass(scene, camera);
    var effectBloom = new THREE.BloomPass(1, 25, 5);
    var sceneRenderModel = new THREE.RenderPass(scene, camera);
    var effectCopy = new THREE.ShaderPass(THREE.CopyShader);
    effectCopy.renderToScreen = true;
    composer.addPass(sunRenderModel);
    composer.addPass(effectBloom);
    composer.addPass(effectCopy);

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