73 lines
1.8 KiB
TypeScript
73 lines
1.8 KiB
TypeScript
module TS.SpaceTac {
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/**
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* A ship value is a number that may vary and be constrained in a given range.
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*/
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export class ShipValue {
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// Name of the value
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name: string
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// Current value
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private current: number
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// Upper bound
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private maximal: number | null
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constructor(code: string, current = 0, maximal: number | null = null) {
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this.name = code;
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this.current = current;
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this.maximal = maximal;
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}
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/**
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* Get the current value
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*/
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get(): number {
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return this.current;
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}
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/**
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* Set the upper bound the value must not cross
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*/
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setMaximal(value: number): void {
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this.maximal = value;
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this.fix();
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}
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/**
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* Set an absolute value
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*
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* Returns the variation in value
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*/
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set(value: number): number {
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var old_value = this.current;
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this.current = value;
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this.fix();
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return this.current - old_value;
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}
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/**
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* Add an offset to current value
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*
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* Returns true if the value changed
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*/
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add(value: number): number {
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var old_value = this.current;
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this.current += value;
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this.fix();
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return this.current - old_value;
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}
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/**
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* Fix the value to be positive and lower than maximal
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*/
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private fix(): void {
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if (this.maximal !== null && this.current > this.maximal) {
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this.current = this.maximal;
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}
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if (this.current < 0) {
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this.current = 0;
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}
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}
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}
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}
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