I actually implemented this early on in UJI's development – the code's still there, albeit commented-out:

Lines 309 to 327 in 59f8519

    
           // commented-out since it only very rarely produces interesting results – the 
        
           // space is just way too n-dimensional. also, would need to deal with floating 
        
           // point stringification stuff, which ugh 
        
           /*function randomize() { 
        
               let randomized = JSON.parse(JSON.stringify(defaults)); 
        
               Object.keys(options).forEach(n => { 
        
                   const o = options[n]; 
        
                   const v = optionValues[n]; 
        
                   const minScaled = o.min / o.step; 
        
                   const maxScaled = o.max / o.step; 
        
                   let rand = parseInt(minScaled + Math.random() * (maxScaled - minScaled)) * o.step; 
        
                   if (!o.step.toString().includes(".")) { 
        
                       rand = parseInt(rand); 
        
                   } 
        
                   randomized[n] = rand; 
        
               }); 
        
               applyOptions(randomized); 
        
           }*/

It worked fairly well when there were only a few options, but as I added more, it started delivering bad results exceedingly frequently. (Because: If randomizing any one option has a, say, 50% probability of yielding a cool image, with 20 options, the total probability is more or less 0.5²⁰, which is a really tiny number.)

So a button to randomize all sliders won't yield many interesting results, but randomizing within sets as you suggest (or randomly jiggling a few sliders) might be worth a shot. How to communicate that through the UI is another challenge. I think it makes sense to postpone this, though, until I implement an undo/redo feature as mentioned in README.md.

	// commented-out since it only very rarely produces interesting results – the
	// space is just way too n-dimensional. also, would need to deal with floating
	// point stringification stuff, which ugh
	/*function randomize() {
	let randomized = JSON.parse(JSON.stringify(defaults));
	Object.keys(options).forEach(n => {
	const o = options[n];
	const v = optionValues[n];

	const minScaled = o.min / o.step;
	const maxScaled = o.max / o.step;
	let rand = parseInt(minScaled + Math.random() * (maxScaled - minScaled)) * o.step;
	if (!o.step.toString().includes(".")) {
	rand = parseInt(rand);
	}
	randomized[n] = rand;
	});
	applyOptions(randomized);
	}*/

Randomize all slider options? #1

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