How to disable a pattern?

[spiffytech]

How can I disable a specific pattern when using geopattern? One of them doesn't look good in my context. I see geopattern takes a generator parameter, but I can't tell what I should supply there.

[btmills]

The generator option lets you specify a specific pattern name from the PATTERNS array. That overrides the value derived from the input hash. It sounds like you don't necessarily want to override it, just remove one. I suppose you could extend the generator class and override generatePattern:

geopattern/lib/pattern.js

Lines 144 to 158 in 7f7fd79

	Pattern.prototype.generatePattern = function () {
	var generator = this.opts.generator;
	if (generator) {
	if (PATTERNS.indexOf(generator) < 0) {
	throw new Error('The generator '
	+ generator
	+ ' does not exist.');
	}
	} else {
	generator = PATTERNS[hexVal(this.hash, 20)];
	}
	return this['geo' + generator.slice(0, 1).toUpperCase() + generator.slice(1)]();
	};

It chooses the pattern index based on one of the hex digits in the hashed input. You'd run into an issue removing one of the 16 that no longer maps to a pattern. A few ideas:

• You could add logic that says "if removed, go to the next one" as long as you're okay with that pattern being twice as likely as any other.
• Replace the pattern with a new one of your own design.
• Pull from an additional hex digit and redistribute the 256 values among 15 possible patterns. Still not quite evenly divisible, but much closer than one being twice as likely.