103 lines
2.5 KiB
TypeScript
103 lines
2.5 KiB
TypeScript
module TK.SpaceTac {
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/**
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* Level and experience system for a ship.
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*/
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export class ShipLevel {
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private level = 1;
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private experience = 0;
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/**
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* Get current level
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*/
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get(): number {
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return this.level;
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}
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/**
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* Get the current experience points
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*/
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getExperience(): number {
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return this.experience;
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}
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/**
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* Get the next experience goal to reach, to gain one level
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*/
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getNextGoal(): number {
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return isum(imap(irange(this.level), i => (i + 1) * 100));
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}
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/**
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* Force experience gain, to reach a given level
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*/
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forceLevel(level: number): void {
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while (this.level < level) {
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this.forceLevelUp();
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}
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}
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/**
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* Force a level up
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*/
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forceLevelUp(): void {
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let old_level = this.level;
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this.addExperience(this.getNextGoal() - this.experience);
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this.checkLevelUp();
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if (old_level >= this.level) {
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// security against infinite loops
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throw new Error("No effective level up");
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}
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}
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/**
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* Check for level-up
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*
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* Returns true if level changed
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*/
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checkLevelUp(): boolean {
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let changed = false;
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while (this.experience >= this.getNextGoal()) {
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this.level++;
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changed = true;
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}
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return changed;
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}
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/**
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* Add experience points
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*/
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addExperience(points: number): void {
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this.experience += points;
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}
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/**
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* Get skill points given by current level
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*/
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getSkillPoints(): number {
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return 5 + 5 * this.level;
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}
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/**
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* Get the level needed to have a given total of points
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*/
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static getLevelForPoints(points: number): number {
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let lev = new ShipLevel();
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while (lev.getSkillPoints() < points) {
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lev.forceLevelUp();
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}
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return lev.level;
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}
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/**
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* Get the points available at a given level
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*/
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static getPointsForLevel(level: number): number {
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let lev = new ShipLevel();
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lev.forceLevel(level);
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return lev.getSkillPoints();
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}
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}
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}
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