3 changed files with 382 additions and 380 deletions
Split View
Diff Options
-
+379 -0asphodice.ts
-
+1 -378dice.ts
-
+2 -2test/test-dice.spec.ts
+ 379
- 0
asphodice.ts
View File
| @@ -0,0 +1,379 @@ | |||
| const util = require('util'); | |||
| /** | |||
| * Counts the occurrences of a number in an array of numbers | |||
| * | |||
| * @param inputArray - array of numbers | |||
| * @param checkNumber - number to count occurrences of | |||
| * @returns number of occurrences | |||
| * | |||
| */ | |||
| function countOccurrencesOfNumber(inputArray: Array<number>, checkNumber: number): number { | |||
| return inputArray.filter(c => c === checkNumber).length; | |||
| } | |||
| /** | |||
| * Generate a random integer between *1* and `max` (inclusive) | |||
| * | |||
| * @param max - upper bound of random integer to generate | |||
| * @returns random integer | |||
| */ | |||
| function randIntMinOne(max: number): number { | |||
| return (1 + Math.floor(Math.random() * Math.floor(max))); | |||
| } | |||
| interface Dice { | |||
| readonly sides: number; | |||
| readonly type: string; | |||
| } | |||
| export enum Outcomes { | |||
| Success = "Success", | |||
| Fail = "Failure", | |||
| CritSuccess = "Critical Success", | |||
| CritFail = "Critical Failure", | |||
| Other = "Something Else" | |||
| } | |||
| interface DiceResult { | |||
| total: number; | |||
| dice: Array<number>; | |||
| olddice?: Array<number>; | |||
| reroll?: boolean; | |||
| outcome?: Outcomes; | |||
| balance?: number; | |||
| } | |||
| interface ItemCount { | |||
| item: string | number | Outcomes; | |||
| count: number; | |||
| } | |||
| declare let ItemCountSet: Array<ItemCount>; | |||
| /** | |||
| * Simple d10, implements `roll()` | |||
| */ | |||
| class D10 implements Dice { | |||
| sides: number = 10; | |||
| type: string = "d10" | |||
| roll(numberToRoll: number): DiceResult { | |||
| let results: DiceResult = { total: 0, dice: [] }; | |||
| for (let i = 0; i < numberToRoll; i++) { | |||
| results.dice.push(randIntMinOne(this.sides)); | |||
| } | |||
| results.total = results.dice.reduce((acc: number, curr: number) => acc + curr); | |||
| return results; | |||
| } | |||
| [util.inspect.custom](): string { | |||
| return this.type; | |||
| } | |||
| /** | |||
| * Roll a specified number of dice | |||
| * | |||
| * @param numberToRoll - integer number of dice to roll | |||
| * @returns DiceResult: .total and .dice (individual dice) | |||
| * | |||
| * @example Roll 4d10 | |||
| * | |||
| * ``` | |||
| * D10.roll(4) | |||
| * { total: 16, dice [ 3, 5, 6, 2] } | |||
| * | |||
| */ | |||
| } | |||
| export class Asphodice extends D10 { | |||
| readonly type: string = "asphodice"; | |||
| readonly passCrit: number = 10; | |||
| readonly failCrit: number = 1; | |||
| readonly successCutOff: number = 6; // this or larger | |||
| /** | |||
| * Re-roll the high dice (ie >= 6) for a chance of failure | |||
| * happens on eg 1 | |||
| * | |||
| * @remarks | |||
| * Basically we want to remove a die from the original result, | |||
| * as long as that die isn't a 10, and is above the | |||
| * cutoff. So we filter to get rerollCandidates, find the | |||
| * highest value and get the index of that value in the | |||
| * original results. We use that to splice() out (remove) that | |||
| * value and push the rerolled dice onto the modified array | |||
| * | |||
| * @param rerollDice | |||
| * @returns rerollOutcome | |||
| * | |||
| * @example Re-roll High Dice on 1 | |||
| * ``` | |||
| * rerollHighDice([8, 1, 1, 4, 7, 10]); | |||
| * [ 1, 1, 4, 7, 10, 6] | |||
| * ``` | |||
| * | |||
| * ## Explanation | |||
| * | |||
| * - first filter dice to be not 10 and >= 6 (see {@link Asphodice.successCutOff}) | |||
| * - rerollCandidates are [8, 7] | |||
| * - max([8, 7] = 8 | |||
| * - indexOf(8) = 0 | |||
| * - rerollResult = 6 (see {@link randIntMinOne()}) | |||
| * - `splice()` replaced dice out of array = [ 1, 1, 4, 7, 10 ] | |||
| * - `push()` new dice = [ 1, 1, 4, 7, 10, 6] | |||
| */ | |||
| rerollHighDice (rerollDice: Array<number>): Array<number> { | |||
| let rerollCandidates: Array<number> = rerollDice.filter(die => (die < 10 && die >= this.successCutOff)); | |||
| let maxValue: number = Math.max(...rerollCandidates); | |||
| let maxIndex = rerollDice.indexOf(maxValue); | |||
| let rerollResult: number = randIntMinOne(this.sides); | |||
| rerollDice.splice(maxIndex, 1); | |||
| rerollDice.push(rerollResult); | |||
| return rerollDice | |||
| } | |||
| /** | |||
| * Re-roll low dice (ie < 6) for chance of success (ie getting >= 6) | |||
| * | |||
| * @remarks | |||
| * | |||
| * Generally happens on a 10. | |||
| * | |||
| * @see {@link Asphodice.rerollHighDice} for a fuller explanation | |||
| * for what process in opposite direction | |||
| */ | |||
| rerollLowDice (rerollDice: Array<number>): Array<number> { | |||
| let rerollCandidates: Array<number> = rerollDice.filter(die => (die > 1 && die < this.successCutOff)); | |||
| let minValue: number = Math.min(...rerollCandidates); | |||
| let minIndex = rerollDice.indexOf(minValue); | |||
| let rerollResult: number = randIntMinOne(this.sides); | |||
| rerollDice.splice(minIndex, 1); | |||
| rerollDice.push(rerollResult); | |||
| return rerollDice | |||
| } | |||
| /** | |||
| * Used to determine if all dice are above Asphodice.successCutOff | |||
| * | |||
| * @param checkDice - Array of Dice to test | |||
| * | |||
| * @see {@link Asphodice.roll} where it is used to determine if | |||
| * a re-roll can be skipped | |||
| * | |||
| * @see {@link allBelowCutOff} also. | |||
| */ | |||
| allAboveCutOff (checkDice: Array<number>): boolean { | |||
| // if filtering those *below* cutoff results in empty set | |||
| // then all must be above cutoff | |||
| return ((checkDice.filter(die => die < this.successCutOff).length == 0)); | |||
| } | |||
| /** | |||
| * Used to determine if all dice are below Asphodice.successCutOff | |||
| * | |||
| * @param checkDice - Array of Dice to test | |||
| * | |||
| * @see {@link Asphodice.roll} where it is used to determine if | |||
| * a re-roll can be skipped | |||
| * | |||
| * @see {@link allAboveCutOff} also. | |||
| */ | |||
| allBelowCutOff (checkDice: Array<number>): boolean { | |||
| // if filtering those *above or equal to* cutoff results in empty set | |||
| // then all must be below cutoff | |||
| return ((checkDice.filter(die => die >= this.successCutOff).length == 0)); | |||
| } | |||
| /** | |||
| * Determine balance of outcomes - ie successes minus failures | |||
| * | |||
| * @remarks | |||
| * | |||
| * Success = 1, failure = -1 | |||
| * | |||
| * Particularly for Asphodice, we aren't terribly concerned with the | |||
| * numeric sum total of the dice values, we are more concerned with | |||
| * the overall outcome (see {@link Outcomes}) and for narrative purposes | |||
| * perhaps the balance of outcomes; for example, 1 success may be | |||
| * narrated differently than 4 successes. | |||
| * | |||
| * **Special note**: This ignores crits! **End special note** | |||
| * | |||
| * TODO: Special consideration of a single die roll (?) | |||
| * | |||
| * @param resultDice - the final dice after any re-rolls | |||
| * @returns Single positive/negative number with balance of roll outcomes | |||
| * | |||
| * @example Count Outcomes of 5 Dice | |||
| * ``` | |||
| * countOutcomeBalance([ 7, 4, 4, 9, 1 ]) | |||
| * -1 | |||
| * ``` | |||
| * | |||
| * - 7 and 9 are above successCutOff → +2 | |||
| * - 4, 4, 1 are below successCutOff → -3 | |||
| */ | |||
| countOutcomeBalance (resultDice: Array<number>): number{ | |||
| // fun with ternary operators | |||
| return resultDice.reduce( | |||
| (acc: number, curr: number) => | |||
| { return (curr < this.successCutOff) ? acc - 1 : acc + 1 }, | |||
| 0); | |||
| // PS also good practice to supply initialValue (0) | |||
| } | |||
| /** | |||
| * Determine and return outcome of roll | |||
| * | |||
| * @remarks | |||
| * | |||
| * Determines outcome as in "Success", "Failure", etc. Assumes that `resultDice` is | |||
| * the 'final' result after any rerolls. | |||
| * | |||
| * @see {@link:countOutcomeBalance} | |||
| */ | |||
| checkOutcome (resultDice: Array<number>): Outcomes{ | |||
| // Note: currently, one success = Success, regardless of number of failures | |||
| // TODO: Critical failures, once decided with Mao | |||
| if (this.allBelowCutOff(resultDice)) { | |||
| return Outcomes.Fail; | |||
| } else { | |||
| return Outcomes.Success; | |||
| } | |||
| } | |||
| /** | |||
| * 'Cancel out' reroll dice | |||
| * | |||
| * @remarks | |||
| * | |||
| * Helper function. | |||
| * | |||
| * **In the context of deciding a reroll only**, the reroll dice can | |||
| * 'cancel' each other out. The dice themselves remain intact for the | |||
| * purposes of determining the final outcome. | |||
| * | |||
| * @returns Filtered dice | |||
| */ | |||
| cancelRerollDice (resultDice: Array<number>): Array<number> { | |||
| // Naive approach for now: | |||
| // - count 10s and 1s | |||
| // - remove all 10s and 1s from input array | |||
| // - re-add 10s/1s after 'cancelling' | |||
| let tens = 0; | |||
| let ones = 0; | |||
| // count | |||
| for (let die of resultDice) { | |||
| if (die === 10) { | |||
| tens++; | |||
| } else if (die === 1) { | |||
| ones++; | |||
| } | |||
| } | |||
| // remove any reroll dice | |||
| let outputDice = resultDice.filter( die => (die != 1 && die != 10) ); | |||
| let balance = tens - ones; | |||
| if (balance < 0) { | |||
| // add balance of ones | |||
| outputDice.push(...Array(Math.abs(balance)).fill(1)); | |||
| } else if (balance > 0) { | |||
| // add balance of tens | |||
| outputDice.push(...Array(Math.abs(balance)).fill(10)); | |||
| } | |||
| return outputDice; | |||
| } | |||
| /** | |||
| * Determines if a reroll is needed | |||
| * | |||
| * @remarks | |||
| * | |||
| * In some cases we don't reroll: | |||
| * - reroll dice cancel each other out | |||
| * - all are above cutoff (=> auto-success -- NB TODO crits) | |||
| * - all below cutoff | |||
| */ | |||
| rerollNeeded(resultDice: Array<number>): boolean{ | |||
| // 'Cancel out' matching re-roll dice | |||
| let cancelledDice = this.cancelRerollDice(resultDice); | |||
| // 1. if no re-rolls we can finish here | |||
| if (!(cancelledDice.includes(this.passCrit) || resultDice.includes(this.failCrit))) { | |||
| return false; | |||
| } | |||
| // count successes and fails | |||
| let rerollGood = countOccurrencesOfNumber(cancelledDice, this.passCrit); | |||
| let rerollBad = countOccurrencesOfNumber(cancelledDice, this.failCrit); | |||
| // 2. only reroll if they don't cancel each other out | |||
| if (rerollGood == rerollBad) { | |||
| return false; | |||
| } | |||
| // 3. If all dice are above/below cutoff we don't need to reroll | |||
| if (this.allAboveCutOff(cancelledDice) || this.allBelowCutOff(cancelledDice)) { | |||
| return false; | |||
| } | |||
| // We should re-roll | |||
| return true; | |||
| } | |||
| /** | |||
| * Roll an Asphodie or Asphodice | |||
| * | |||
| * @param numToRoll | |||
| * @returns a {@link DiceResult} with additional properties: | |||
| * - reroll: boolean - whether we rerolled | |||
| * - olddice: Array - original roll | |||
| * - dice: Array - final outcome | |||
| * - balance: number - +/- of outcomes (successes/failures) | |||
| */ | |||
| roll (numToRoll: number): DiceResult { | |||
| let results: DiceResult = { total: 0, dice: [] }; | |||
| // Initial roll | |||
| for (let i = 0; i < numToRoll; i++) { | |||
| results.dice.push(randIntMinOne(this.sides)); | |||
| } | |||
| // Reroll? | |||
| if (this.rerollNeeded(results.dice)) { | |||
| // Reminder: arr1 = arr2 is a copy by reference! | |||
| let olddice = results.dice.slice(); | |||
| let rerollGood = countOccurrencesOfNumber(olddice, this.passCrit); | |||
| let rerollBad = countOccurrencesOfNumber(olddice, this.failCrit); | |||
| if (rerollGood > rerollBad) { | |||
| // Re-roll low (<6) dice for chance of success | |||
| results.dice = this.rerollLowDice(results.dice); | |||
| } else { | |||
| // Re-roll high (>=6) dice for chance of failure | |||
| results.dice = this.rerollHighDice(results.dice); | |||
| } | |||
| results.olddice = olddice; | |||
| results.reroll = true; | |||
| } | |||
| results.balance = this.countOutcomeBalance(results.dice); | |||
| results.total = results.dice.reduce((acc: number, curr: number) => acc + curr); | |||
| // Finally, once we're done with rerolls etc, determine outcome | |||
| results.outcome = this.checkOutcome(results.dice); | |||
| return results; | |||
| } | |||
| } | |||
+ 1
- 378
dice.ts
View File
| @@ -1,381 +1,4 @@ | |||
| const util = require('util'); | |||
| /** | |||
| * Counts the occurrences of a number in an array of numbers | |||
| * | |||
| * @param inputArray - array of numbers | |||
| * @param checkNumber - number to count occurrences of | |||
| * @returns number of occurrences | |||
| * | |||
| */ | |||
| function countOccurrencesOfNumber(inputArray: Array<number>, checkNumber: number): number { | |||
| return inputArray.filter(c => c === checkNumber).length; | |||
| } | |||
| /** | |||
| * Generate a random integer between *1* and `max` (inclusive) | |||
| * | |||
| * @param max - upper bound of random integer to generate | |||
| * @returns random integer | |||
| */ | |||
| function randIntMinOne(max: number): number { | |||
| return (1 + Math.floor(Math.random() * Math.floor(max))); | |||
| } | |||
| interface Dice { | |||
| readonly sides: number; | |||
| readonly type: string; | |||
| } | |||
| export enum Outcomes { | |||
| Success = "Success", | |||
| Fail = "Failure", | |||
| CritSuccess = "Critical Success", | |||
| CritFail = "Critical Failure", | |||
| Other = "Something Else" | |||
| } | |||
| interface DiceResult { | |||
| total: number; | |||
| dice: Array<number>; | |||
| olddice?: Array<number>; | |||
| reroll?: boolean; | |||
| outcome?: Outcomes; | |||
| balance?: number; | |||
| } | |||
| interface ItemCount { | |||
| item: string | number | Outcomes; | |||
| count: number; | |||
| } | |||
| declare let ItemCountSet: Array<ItemCount>; | |||
| /** | |||
| * Simple d10, implements `roll()` | |||
| */ | |||
| class D10 implements Dice { | |||
| sides: number = 10; | |||
| type: string = "d10" | |||
| roll(numberToRoll: number): DiceResult { | |||
| let results: DiceResult = { total: 0, dice: [] }; | |||
| for (let i = 0; i < numberToRoll; i++) { | |||
| results.dice.push(randIntMinOne(this.sides)); | |||
| } | |||
| results.total = results.dice.reduce((acc: number, curr: number) => acc + curr); | |||
| return results; | |||
| } | |||
| [util.inspect.custom](): string { | |||
| return this.type; | |||
| } | |||
| /** | |||
| * Roll a specified number of dice | |||
| * | |||
| * @param numberToRoll - integer number of dice to roll | |||
| * @returns DiceResult: .total and .dice (individual dice) | |||
| * | |||
| * @example Roll 4d10 | |||
| * | |||
| * ``` | |||
| * D10.roll(4) | |||
| * { total: 16, dice [ 3, 5, 6, 2] } | |||
| * | |||
| */ | |||
| } | |||
| export class Asphodice extends D10 { | |||
| readonly type: string = "asphodice"; | |||
| readonly passCrit: number = 10; | |||
| readonly failCrit: number = 1; | |||
| readonly successCutOff: number = 6; // this or larger | |||
| /** | |||
| * Re-roll the high dice (ie >= 6) for a chance of failure | |||
| * happens on eg 1 | |||
| * | |||
| * @remarks | |||
| * Basically we want to remove a die from the original result, | |||
| * as long as that die isn't a 10, and is above the | |||
| * cutoff. So we filter to get rerollCandidates, find the | |||
| * highest value and get the index of that value in the | |||
| * original results. We use that to splice() out (remove) that | |||
| * value and push the rerolled dice onto the modified array | |||
| * | |||
| * @param rerollDice | |||
| * @returns rerollOutcome | |||
| * | |||
| * @example Re-roll High Dice on 1 | |||
| * ``` | |||
| * rerollHighDice([8, 1, 1, 4, 7, 10]); | |||
| * [ 1, 1, 4, 7, 10, 6] | |||
| * ``` | |||
| * | |||
| * ## Explanation | |||
| * | |||
| * - first filter dice to be not 10 and >= 6 (see {@link Asphodice.successCutOff}) | |||
| * - rerollCandidates are [8, 7] | |||
| * - max([8, 7] = 8 | |||
| * - indexOf(8) = 0 | |||
| * - rerollResult = 6 (see {@link randIntMinOne()}) | |||
| * - `splice()` replaced dice out of array = [ 1, 1, 4, 7, 10 ] | |||
| * - `push()` new dice = [ 1, 1, 4, 7, 10, 6] | |||
| */ | |||
| rerollHighDice (rerollDice: Array<number>): Array<number> { | |||
| let rerollCandidates: Array<number> = rerollDice.filter(die => (die < 10 && die >= this.successCutOff)); | |||
| let maxValue: number = Math.max(...rerollCandidates); | |||
| let maxIndex = rerollDice.indexOf(maxValue); | |||
| let rerollResult: number = randIntMinOne(this.sides); | |||
| rerollDice.splice(maxIndex, 1); | |||
| rerollDice.push(rerollResult); | |||
| return rerollDice | |||
| } | |||
| /** | |||
| * Re-roll low dice (ie < 6) for chance of success (ie getting >= 6) | |||
| * | |||
| * @remarks | |||
| * | |||
| * Generally happens on a 10. | |||
| * | |||
| * @see {@link Asphodice.rerollHighDice} for a fuller explanation | |||
| * for what process in opposite direction | |||
| */ | |||
| rerollLowDice (rerollDice: Array<number>): Array<number> { | |||
| let rerollCandidates: Array<number> = rerollDice.filter(die => (die > 1 && die < this.successCutOff)); | |||
| let minValue: number = Math.min(...rerollCandidates); | |||
| let minIndex = rerollDice.indexOf(minValue); | |||
| let rerollResult: number = randIntMinOne(this.sides); | |||
| rerollDice.splice(minIndex, 1); | |||
| rerollDice.push(rerollResult); | |||
| return rerollDice | |||
| } | |||
| /** | |||
| * Used to determine if all dice are above Asphodice.successCutOff | |||
| * | |||
| * @param checkDice - Array of Dice to test | |||
| * | |||
| * @see {@link Asphodice.roll} where it is used to determine if | |||
| * a re-roll can be skipped | |||
| * | |||
| * @see {@link allBelowCutOff} also. | |||
| */ | |||
| allAboveCutOff (checkDice: Array<number>): boolean { | |||
| // if filtering those *below* cutoff results in empty set | |||
| // then all must be above cutoff | |||
| return ((checkDice.filter(die => die < this.successCutOff).length == 0)); | |||
| } | |||
| /** | |||
| * Used to determine if all dice are below Asphodice.successCutOff | |||
| * | |||
| * @param checkDice - Array of Dice to test | |||
| * | |||
| * @see {@link Asphodice.roll} where it is used to determine if | |||
| * a re-roll can be skipped | |||
| * | |||
| * @see {@link allAboveCutOff} also. | |||
| */ | |||
| allBelowCutOff (checkDice: Array<number>): boolean { | |||
| // if filtering those *above or equal to* cutoff results in empty set | |||
| // then all must be below cutoff | |||
| return ((checkDice.filter(die => die >= this.successCutOff).length == 0)); | |||
| } | |||
| /** | |||
| * Determine balance of outcomes - ie successes minus failures | |||
| * | |||
| * @remarks | |||
| * | |||
| * Success = 1, failure = -1 | |||
| * | |||
| * Particularly for Asphodice, we aren't terribly concerned with the | |||
| * numeric sum total of the dice values, we are more concerned with | |||
| * the overall outcome (see {@link Outcomes}) and for narrative purposes | |||
| * perhaps the balance of outcomes; for example, 1 success may be | |||
| * narrated differently than 4 successes. | |||
| * | |||
| * **Special note**: This ignores crits! **End special note** | |||
| * | |||
| * TODO: Special consideration of a single die roll (?) | |||
| * | |||
| * @param resultDice - the final dice after any re-rolls | |||
| * @returns Single positive/negative number with balance of roll outcomes | |||
| * | |||
| * @example Count Outcomes of 5 Dice | |||
| * ``` | |||
| * countOutcomeBalance([ 7, 4, 4, 9, 1 ]) | |||
| * -1 | |||
| * ``` | |||
| * | |||
| * - 7 and 9 are above successCutOff → +2 | |||
| * - 4, 4, 1 are below successCutOff → -3 | |||
| */ | |||
| countOutcomeBalance (resultDice: Array<number>): number{ | |||
| // fun with ternary operators | |||
| return resultDice.reduce( | |||
| (acc: number, curr: number) => | |||
| { return (curr < this.successCutOff) ? acc - 1 : acc + 1 }, | |||
| 0); | |||
| // PS also good practice to supply initialValue (0) | |||
| } | |||
| /** | |||
| * Determine and return outcome of roll | |||
| * | |||
| * @remarks | |||
| * | |||
| * Determines outcome as in "Success", "Failure", etc. Assumes that `resultDice` is | |||
| * the 'final' result after any rerolls. | |||
| * | |||
| * @see {@link:countOutcomeBalance} | |||
| */ | |||
| checkOutcome (resultDice: Array<number>): Outcomes{ | |||
| // Note: currently, one success = Success, regardless of number of failures | |||
| // TODO: Critical failures, once decided with Mao | |||
| if (this.allBelowCutOff(resultDice)) { | |||
| return Outcomes.Fail; | |||
| } else { | |||
| return Outcomes.Success; | |||
| } | |||
| } | |||
| /** | |||
| * 'Cancel out' reroll dice | |||
| * | |||
| * @remarks | |||
| * | |||
| * Helper function. | |||
| * | |||
| * **In the context of deciding a reroll only**, the reroll dice can | |||
| * 'cancel' each other out. The dice themselves remain intact for the | |||
| * purposes of determining the final outcome. | |||
| * | |||
| * @returns Filtered dice | |||
| */ | |||
| cancelRerollDice (resultDice: Array<number>): Array<number> { | |||
| // Naive approach for now: | |||
| // - count 10s and 1s | |||
| // - remove all 10s and 1s from input array | |||
| // - re-add 10s/1s after 'cancelling' | |||
| let tens = 0; | |||
| let ones = 0; | |||
| // count | |||
| for (let die of resultDice) { | |||
| if (die === 10) { | |||
| tens++; | |||
| } else if (die === 1) { | |||
| ones++; | |||
| } | |||
| } | |||
| // remove any reroll dice | |||
| let outputDice = resultDice.filter( die => (die != 1 && die != 10) ); | |||
| let balance = tens - ones; | |||
| if (balance < 0) { | |||
| // add balance of ones | |||
| outputDice.push(...Array(Math.abs(balance)).fill(1)); | |||
| } else if (balance > 0) { | |||
| // add balance of tens | |||
| outputDice.push(...Array(Math.abs(balance)).fill(10)); | |||
| } | |||
| return outputDice; | |||
| } | |||
| /** | |||
| * Determines if a reroll is needed | |||
| * | |||
| * @remarks | |||
| * | |||
| * In some cases we don't reroll: | |||
| * - reroll dice cancel each other out | |||
| * - all are above cutoff (=> auto-success -- NB TODO crits) | |||
| * - all below cutoff | |||
| */ | |||
| rerollNeeded(resultDice: Array<number>): boolean{ | |||
| // 'Cancel out' matching re-roll dice | |||
| let cancelledDice = this.cancelRerollDice(resultDice); | |||
| // 1. if no re-rolls we can finish here | |||
| if (!(cancelledDice.includes(this.passCrit) || resultDice.includes(this.failCrit))) { | |||
| return false; | |||
| } | |||
| // count successes and fails | |||
| let rerollGood = countOccurrencesOfNumber(cancelledDice, this.passCrit); | |||
| let rerollBad = countOccurrencesOfNumber(cancelledDice, this.failCrit); | |||
| // 2. only reroll if they don't cancel each other out | |||
| if (rerollGood == rerollBad) { | |||
| return false; | |||
| } | |||
| // 3. If all dice are above/below cutoff we don't need to reroll | |||
| if (this.allAboveCutOff(cancelledDice) || this.allBelowCutOff(cancelledDice)) { | |||
| return false; | |||
| } | |||
| // We should re-roll | |||
| return true; | |||
| } | |||
| /** | |||
| * Roll an Asphodie or Asphodice | |||
| * | |||
| * @param numToRoll | |||
| * @returns a {@link DiceResult} with additional properties: | |||
| * - reroll: boolean - whether we rerolled | |||
| * - olddice: Array - original roll | |||
| * - dice: Array - final outcome | |||
| * - balance: number - +/- of outcomes (successes/failures) | |||
| */ | |||
| roll (numToRoll: number): DiceResult { | |||
| let results: DiceResult = { total: 0, dice: [] }; | |||
| // Initial roll | |||
| for (let i = 0; i < numToRoll; i++) { | |||
| results.dice.push(randIntMinOne(this.sides)); | |||
| } | |||
| // Reroll? | |||
| if (this.rerollNeeded(results.dice)) { | |||
| // Reminder: arr1 = arr2 is a copy by reference! | |||
| let olddice = results.dice.slice(); | |||
| let rerollGood = countOccurrencesOfNumber(olddice, this.passCrit); | |||
| let rerollBad = countOccurrencesOfNumber(olddice, this.failCrit); | |||
| if (rerollGood > rerollBad) { | |||
| // Re-roll low (<6) dice for chance of success | |||
| results.dice = this.rerollLowDice(results.dice); | |||
| } else { | |||
| // Re-roll high (>=6) dice for chance of failure | |||
| results.dice = this.rerollHighDice(results.dice); | |||
| } | |||
| results.olddice = olddice; | |||
| results.reroll = true; | |||
| } | |||
| results.balance = this.countOutcomeBalance(results.dice); | |||
| results.total = results.dice.reduce((acc: number, curr: number) => acc + curr); | |||
| // Finally, once we're done with rerolls etc, determine outcome | |||
| results.outcome = this.checkOutcome(results.dice); | |||
| return results; | |||
| } | |||
| } | |||
| import { Asphodice } from "./asphodice"; | |||
| let asphodice: Asphodice = new Asphodice(); | |||
| let number: number = 4; | |||
+ 2
- 2
test/test-dice.spec.ts
View File
| @@ -1,5 +1,5 @@ | |||
| import { Asphodice } from "../dice"; | |||
| import { Outcomes } from "../dice"; | |||
| import { Asphodice } from "../asphodice"; | |||
| import { Outcomes } from "../asphodice"; | |||
| import { expect } from 'chai'; | |||
| import 'mocha'; | |||