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const theta = -Math.atan(offset/h); | const theta = -Math.atan(offset/h); | ||
const a = Math.cos(theta); | const a = Math.cos(theta); | ||
const b = | const b = Math.sin(theta); | ||
const c = Math.sin(theta); | const c = -Math.sin(theta); | ||
const d = Math.cos(theta); | const d = Math.cos(theta); | ||
const showArticleBefore = document.querySelector('#show-article-before'); | const showArticleBefore = document.querySelector('#show-article-before'); |