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Improve workaround for spawnpoint values

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This commit is contained in:
Dev 2024-01-17 10:45:25 +00:00
parent a572d090ba
commit d9186e0e48
2 changed files with 17 additions and 5 deletions
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2
project/src/generators/LocationGenerator.ts
View File

@ -603,7 +603,7 @@ export class LocationGenerator
// Draw from random distribution // Draw from random distribution
const desiredSpawnpointCount = Math.round( const desiredSpawnpointCount = Math.round(
this.getLooseLootMultiplerForLocation(locationName) this.getLooseLootMultiplerForLocation(locationName)
* Math.abs(this.randomUtil.randn(dynamicLootDist.spawnpointCount.mean, dynamicLootDist.spawnpointCount.std)), * this.randomUtil.getNormallyDistributedRandomNumber(dynamicLootDist.spawnpointCount.mean, dynamicLootDist.spawnpointCount.std),
); );
// Positions not in forced but have 100% chance to spawn // Positions not in forced but have 100% chance to spawn

20
project/src/utils/RandomUtil.ts
View File

@ -275,12 +275,13 @@ export class RandomUtil
} }
/** /**
* Draw from normal distribution * Generate a normally distributed random number
* @param {number} mu Mean of the normal distribution * Uses the Box-Muller transform
* @param {number} mean Mean of the normal distribution
* @param {number} sigma Standard deviation of the normal distribution * @param {number} sigma Standard deviation of the normal distribution
* @returns {number} The value drawn * @returns {number} The value drawn
*/ */
public randn(mu: number, sigma: number): number public getNormallyDistributedRandomNumber(mean: number, sigma: number, attempt = 0): number
{ {
let u = 0; let u = 0;
let v = 0; let v = 0;
@ -293,7 +294,18 @@ export class RandomUtil
v = Math.random(); v = Math.random();
} }
const w = Math.sqrt(-2.0 * Math.log(u)) * Math.cos((2.0 * Math.PI) * v); const w = Math.sqrt(-2.0 * Math.log(u)) * Math.cos((2.0 * Math.PI) * v);
return w * sigma + mu; const valueDrawn = mean + w * sigma;
if (valueDrawn < 0)
{
if (attempt > 100)
{
return this.getFloat(0.01, mean * 2);
}
return this.getNormallyDistributedRandomNumber(mean, sigma, attempt++);
}
return valueDrawn;
} }
/** /**