WHS.ResizeModule does not play nicely with WHS.PostProcessorModule

[antoniocapelo]

Describe your issue here.

Version:

• v2.x.x
• v1.x.x

Issue type:

• Bug
• Proposal/Enhancement
• Question
• Discussion

---

Tested on:

Desktop

• Chrome
• Chrome Canary
• Chrome dev-channel
• Firefox
• Opera
• Microsoft IE
• Microsoft Edge

Android

• Chrome
• Firefox
• Opera

IOS

• Chrome
• Firefox
• Opera

I was having troubles getting the scene to keep its ratio and definition on screen resizes, even though I was using the WHS.ResizeModule with the default options.

I just discovered the issue: I'm using the WHS.PostProcessorModule to add some passes and internally it uses the EffectsComposer which creates a new renderer.

This renderer is a different instance from the one that's being updated on the ResizeModule setSize method.

Not really sure if this is a bug (since I'm guessing there's not a direct fix — the manager cannot return the correct renderer, since the order of the modules is relevant), but at least there could be some note on the WHS.PostProcessorModule Documentation, warning about this scenario.

I'm willing to contribute with a PR if needed.

Cheers

[sasha240100]

Hi @antoniocapelo !

Any PRs are welcome! :D
PostProcessorModule creates a new renderTarget. Typically there are only inputBuffer and outputBuffer, but some advanced passes may require more which makes this thing unpredictable.

What you can do is to try to update them manually with this pseudo-code:

// WARNING: Not tested

const {composer} = app.use('postprocessing');

app.use('resize').addCallback((width, height) => {
  // Update buffer sizes
  composer.inputBuffer.setSize(width, height);
  composer.outputBuffer.setSize(width, height);
});

[antoniocapelo]

Hi @sasha240100, I'm willing to help :D Just point me to the better option, would be it be something inside the codebase? A note on the docs?

What I've done was create a ResponsivePostprocessorModule (ignore the name) that does the following:

class ResponsiveEffectComposerModule {
    manager(manager) {
        manager.define('effectComposerResizeHandler');
        const resizeModule = manager.use('resize');

        this.postprocessorModule = manager.use('postprocessor');

        if (!resizeModule) {
            throw new Error('ResizeModule dependency not met. Make sure that ResizeModule is listed as a dependecy of App.');
        }

        if (!this.postprocessorModule) {
            throw new Error('PostProcessorModule dependency not met. Make sure that PostProcessorModule is listed as a dependecy of App.');
        }

        resizeModule.addCallback(this.updateRendererSize.bind(this));
        this.updateRendererSize(window.innerWidth, window.innerHeight);
    }

    updateRendererSize = (windowWidth, windowHeight) => {
        this.postprocessorModule.composer.setSize(windowWidth, windowHeight);
    }
}

I just add this module to the App's module list (in the correct order) and now when I resize the window everything stays sharp.

Probably what you suggested would be needed if my problem persisted?

[sasha240100]

Looks nice and useful! @antoniocapelo You may even drop !resizeModule checks as they should be already done by ModuleSystem.

We're now working more on https://github.com/WhitestormJS/nextgl , which should become a Three.js replacement for Whitestorm.js v3.x, so most of out time & skills are going to that project. Contact me if you are willing to contribute to that one! :)

[antoniocapelo]

@sasha240100 check your twitter DM's (: