:: StoryTitle Limiting the range of a number in Snowman :: UserScript [script] (function () { /* Returns the number clamped to the specified bounds. Usage: → Limit numeric variable to a value between 1 and 10 inclusive. <% s.variable = s.variable.clamp(1, 10) %> */ Object.defineProperty(Number.prototype, 'clamp', { configurable : true, writable : true, value(/* min, max */) { if (this == null) { // lazy equality for null throw new TypeError('Number.prototype.clamp called on null or undefined'); } if (arguments.length !== 2) { throw new Error('Number.prototype.clamp called with an incorrect number of parameters'); } var min = Number(arguments[0]); var max = Number(arguments[1]); if (min > max) { var tmp = min; min = max; max = tmp; } return Math.min(Math.max(this, min), max); } }); /* Returns the given numerical clamped to the specified bounds. Usage: → Limit numeric variable to a value between 1 and 10 inclusive. <% s.variable = Math.clamp(s.variable, 1, 10) %> → Limit result of mathematical operation to a value between 1 and 10 inclusive. <% s.variable = Math.clamp(s.variable + 5, 1, 10) %> */ Object.defineProperty(Math, 'clamp', { configurable : true, writable : true, value(num, min, max) { var value = Number(num); return Number.isNaN(value) ? NaN : value.clamp(min, max); } }); })(); :: Start Initialise the numeric variable to a value with the range you want.
eg. between 1 and 10 inclusive.
(note: You don't need to use the Math.clamp() funtion at this point.)
<% s.valueToClamp = 5 %> Current value: <%= s.valueToClamp %> Increase the number to a value that is within the desired range.
eg. Add 1 to the current value. <% s.valueToClamp = Math.clamp(s.valueToClamp + 1, 1, 10) %> New value: <%= s.valueToClamp %> Try to increase the number to a value that is outside the desired range.
eg. Add 100 to the current value. <% s.valueToClamp = Math.clamp(s.valueToClamp + 100, 1, 10) %> New value: <%= s.valueToClamp %> Decrease the number to a value that is within the desired range.
eg. Minus 5 from the current value. <% s.valueToClamp = Math.clamp(s.valueToClamp - 5, 1, 10) %> New value: <%= s.valueToClamp %> Try to decrease the number to a value that is outside the desired range.
eg. Minus 100 from the current value. <% s.valueToClamp = Math.clamp(s.valueToClamp - 100, 1, 10) %> New value: <%= s.valueToClamp %>