29 lines
1,010 B
TypeScript
29 lines
1,010 B
TypeScript
export const clamp = (value: number, min: number, max: number): number =>
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Math.min(max, Math.max(min, value));
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export const clamp01 = (value: number): number => clamp(value, 0, 1);
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export const mix = (from: number, to: number, amount: number): number =>
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from + (to - from) * amount;
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export const mixAngle = (from: number, to: number, amount: number): number => {
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const delta = Math.atan2(Math.sin(to - from), Math.cos(to - from));
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return from + delta * amount;
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};
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export const approach = (
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current: number,
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target: number,
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elapsedSeconds: number,
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timeConstantSeconds: number
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): number => {
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const amount = 1 - Math.exp(-elapsedSeconds / Math.max(0.001, timeConstantSeconds));
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return mix(current, target, amount);
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};
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export const smoothstep = (edge0: number, edge1: number, value: number): number => {
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const amount = clamp01((value - edge0) / (edge1 - edge0));
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return amount * amount * (3 - 2 * amount);
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};
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export const easeOutQuad = (value: number): number => value * (2 - value);
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