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@@ -22,4 +22,21 @@ module.exports = class Moon {
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*/
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this.velocity = new Vector3(0, 0, 0);
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}
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+
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+ /**
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+ * Check whether or not the moon has returned to its initial position
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+ *
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+ * @returns {bool} True if the current position is the same as the initial position and if the velocity is zero
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+ */
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+ hasReachedInitialState() {
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+ return (
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+ this._initialPosition.x == this.position.x
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+ && this._initialPosition.y == this.position.y
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+ && this._initialPosition.z == this.position.z
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+ ) && (
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+ this.velocity.x == 0
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+ && this.velocity.y == 0
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+ && this.velocity.z == 0
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+ );
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+ }
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};
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