25 lines
725 B
JavaScript
25 lines
725 B
JavaScript
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/**
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* @typedef {function} interpolator
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* @param {number} current the current value.
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* @param {number} dest the destination value.
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* @param {number} frameDelta the time elapsed since the last update.
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* @returns {number} the new current value.
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*/
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// TODO: Add some interpolation functions.
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/**
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*
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* @param {number} rate the number of frequency values to shift by per second.
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* @returns {interpolator} the interpolation function with the given rate.
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*/
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export function createEaseLinear(rate) {
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return (current, dest, frameDelta) => {
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let direction = 1;
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if (dest < current) {
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direction = -1;
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}
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return current + (Math.min(rate * frameDelta, dest) * direction);
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};
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} |