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(function () { |
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|
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var _typoKeys = { |
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family:'font-family', weight:'font-weight', style:'font-style', |
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decoration:'text-decoration', transform:'text-transform', |
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sizeDesktop:'font-size-d', sizeTablet:'font-size-t', sizeMobile:'font-size-m', |
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lineHeightDesktop:'line-height-d', lineHeightTablet:'line-height-t', lineHeightMobile:'line-height-m', |
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letterSpacingDesktop:'letter-spacing-d', letterSpacingTablet:'letter-spacing-t', letterSpacingMobile:'letter-spacing-m', |
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wordSpacingDesktop:'word-spacing-d', wordSpacingTablet:'word-spacing-t', wordSpacingMobile:'word-spacing-m' |
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}; |
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function typoCssVarsForEl(el, obj, prefix) { |
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if (!obj || typeof obj !== 'object') return; |
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Object.keys(_typoKeys).forEach(function (k) { |
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var v = obj[k]; |
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if (v === undefined || v === '' || v === null) return; |
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if (k === 'sizeDesktop' || k === 'sizeTablet' || k === 'sizeMobile') v = v + (obj.sizeUnit || 'px'); |
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else if (k === 'lineHeightDesktop' || k === 'lineHeightTablet' || k === 'lineHeightMobile') v = v + (obj.lineHeightUnit || ''); |
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else if (k === 'letterSpacingDesktop' || k === 'letterSpacingTablet' || k === 'letterSpacingMobile') v = v + (obj.letterSpacingUnit || 'px'); |
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else if (k === 'wordSpacingDesktop' || k === 'wordSpacingTablet' || k === 'wordSpacingMobile') v = v + (obj.wordSpacingUnit || 'px'); |
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el.style.setProperty(prefix + _typoKeys[k], String(v)); |
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}); |
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} |
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|
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function initNoiseSection(appEl) { |
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var opts; |
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try { opts = JSON.parse(appEl.getAttribute('data-opts') || '{}'); } catch(e){ opts={}; } |
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|
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var a = { |
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heading: opts.heading || '', |
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subtext: opts.subtext || '', |
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tag: opts.tag || 'h1', |
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ctaLabel: opts.ctaLabel || 'Get Started', |
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ctaUrl: opts.ctaUrl || '#', |
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ctaLabel2: opts.ctaLabel2 || '', |
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ctaUrl2: opts.ctaUrl2 || '#', |
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showCta: opts.showCta !== false, |
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showCta2: opts.showCta2 || false, |
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textAlign: opts.textAlign || 'center', |
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sectionHeight: opts.sectionHeight || 600, |
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bgType: opts.bgType || 'gradient', |
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bgColor: opts.bgColor || '#0a0a0f', |
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bgColor2: opts.bgColor2 || '#1e1b4b', |
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bgAngle: opts.bgAngle || 135, |
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bgImage: opts.bgImage || '', |
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bgImageOpacity:opts.bgImageOpacity !== undefined ? opts.bgImageOpacity : 0.5, |
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noiseOpacity: opts.noiseOpacity !== undefined ? opts.noiseOpacity : 0.3, |
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noiseTint: opts.noiseTint || 'dark', |
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noiseFps: opts.noiseFps || 12, |
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noiseScale: opts.noiseScale || 1, |
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textColor: opts.textColor || '#ffffff', |
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subtextColor: opts.subtextColor || '#94a3b8', |
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ctaBg: opts.ctaBg || '#ffffff', |
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ctaColor: opts.ctaColor || '#0a0a0f', |
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ctaBg2: opts.ctaBg2 || 'transparent', |
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ctaColor2: opts.ctaColor2 || '#ffffff', |
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ctaBorder2: opts.ctaBorder2 || 'rgba(255,255,255,0.4)', |
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fontSize: opts.fontSize || 72, |
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fontWeight: opts.fontWeight || 800, |
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lineHeight: opts.lineHeight || 1.05, |
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letterSpacing: opts.letterSpacing === undefined ? -2 : opts.letterSpacing, |
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subtextSize: opts.subtextSize || 20, |
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maxWidth: opts.maxWidth || 800, |
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paddingTop: opts.paddingTop || 100, |
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paddingBottom: opts.paddingBottom || 100 |
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}; |
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|
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/* Compute background */ |
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var bg; |
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if (a.bgType === 'gradient') bg = 'linear-gradient(' + a.bgAngle + 'deg, ' + a.bgColor + ', ' + a.bgColor2 + ')'; |
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else bg = a.bgColor; |
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|
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var justify = a.textAlign === 'center' ? 'center' : a.textAlign === 'right' ? 'flex-end' : 'flex-start'; |
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|
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/* Section */ |
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var section = document.createElement('section'); |
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section.className = 'bkbg-ns-section'; |
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var cs = section.style; |
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cs.setProperty('--bkbg-ns-height', a.sectionHeight + 'px'); |
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cs.setProperty('--bkbg-ns-bg', bg); |
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cs.setProperty('--bkbg-ns-pt', a.paddingTop + 'px'); |
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cs.setProperty('--bkbg-ns-pb', a.paddingBottom + 'px'); |
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cs.setProperty('--bkbg-ns-align', a.textAlign); |
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cs.setProperty('--bkbg-ns-justify', justify); |
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cs.setProperty('--bkbg-ns-max-width', a.maxWidth + 'px'); |
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cs.setProperty('--bkbg-ns-text-color',a.textColor); |
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cs.setProperty('--bkbg-ns-sub-color', a.subtextColor); |
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cs.setProperty('--bkbg-ns-font-size', a.fontSize + 'px'); |
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cs.setProperty('--bkbg-ns-fw', String(a.fontWeight)); |
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cs.setProperty('--bkbg-ns-lh', String(a.lineHeight)); |
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cs.setProperty('--bkbg-ns-ls', a.letterSpacing + 'px'); |
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cs.setProperty('--bkbg-ns-sub-size', a.subtextSize + 'px'); |
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cs.setProperty('--bkbg-ns-cta-bg', a.ctaBg); |
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cs.setProperty('--bkbg-ns-cta-color', a.ctaColor); |
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cs.setProperty('--bkbg-ns-cta2-bg', a.ctaBg2); |
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cs.setProperty('--bkbg-ns-cta2-color',a.ctaColor2); |
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cs.setProperty('--bkbg-ns-cta2-border',a.ctaBorder2); |
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|
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/* Bg image */ |
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if (a.bgType === 'image' && a.bgImage) { |
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var imgDiv = document.createElement('div'); |
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imgDiv.className = 'bkbg-ns-bg-img'; |
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imgDiv.style.backgroundImage = 'url(' + a.bgImage + ')'; |
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imgDiv.style.opacity = String(a.bgImageOpacity); |
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section.appendChild(imgDiv); |
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} |
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|
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/* Canvas grain */ |
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var canvas = document.createElement('canvas'); |
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canvas.className = 'bkbg-ns-grain'; |
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section.appendChild(canvas); |
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|
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/* Content */ |
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var content = document.createElement('div'); |
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content.className = 'bkbg-ns-content'; |
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|
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var headingEl = document.createElement(a.tag); |
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headingEl.className = 'bkbg-ns-heading'; |
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headingEl.textContent = a.heading; |
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content.appendChild(headingEl); |
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|
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if (a.subtext) { |
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var subEl = document.createElement('p'); |
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subEl.className = 'bkbg-ns-subtext'; |
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subEl.textContent = a.subtext; |
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content.appendChild(subEl); |
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} |
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|
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var ctasDiv = document.createElement('div'); |
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ctasDiv.className = 'bkbg-ns-ctas'; |
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|
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if (a.showCta && a.ctaLabel) { |
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var cta1 = document.createElement('a'); |
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cta1.className = 'bkbg-ns-cta'; |
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cta1.href = a.ctaUrl; |
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cta1.textContent = a.ctaLabel; |
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ctasDiv.appendChild(cta1); |
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} |
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if (a.showCta2 && a.ctaLabel2) { |
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var cta2 = document.createElement('a'); |
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cta2.className = 'bkbg-ns-cta bkbg-ns-cta-secondary'; |
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cta2.href = a.ctaUrl2; |
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cta2.textContent = a.ctaLabel2; |
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ctasDiv.appendChild(cta2); |
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} |
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if (ctasDiv.children.length) content.appendChild(ctasDiv); |
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|
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section.appendChild(content); |
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appEl.replaceWith(section); |
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|
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/* Typography CSS vars */ |
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typoCssVarsForEl(section, opts.headingTypo, '--bkbg-ns-hd-'); |
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typoCssVarsForEl(section, opts.subtextTypo, '--bkbg-ns-st-'); |
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|
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/* --- Canvas grain animation --- */ |
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var ctx = canvas.getContext('2d'); |
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var pixelRatio = window.devicePixelRatio || 1; |
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var frameInterval = 1000 / Math.max(1, a.noiseFps); |
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var lastFrame = 0; |
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var rafId = null; |
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|
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/* Tint color for noise pixels */ |
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var tintR = 0, tintG = 0, tintB = 0; |
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if (a.noiseTint === 'light') { tintR=255; tintG=255; tintB=220; } |
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else if (a.noiseTint === 'colored') { tintR=120; tintG=80; tintB=200; } |
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|
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function resizeCanvas() { |
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var w = section.offsetWidth || 800; |
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var h = section.offsetHeight || a.sectionHeight; |
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canvas.width = Math.ceil(w * pixelRatio / a.noiseScale); |
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canvas.height = Math.ceil(h * pixelRatio / a.noiseScale); |
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canvas.style.width = w + 'px'; |
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canvas.style.height = h + 'px'; |
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} |
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|
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function drawNoise(now) { |
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if (now - lastFrame < frameInterval) return; |
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lastFrame = now; |
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|
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var w = canvas.width, h = canvas.height; |
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var imageData = ctx.createImageData(w, h); |
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var data = imageData.data; |
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var alpha = Math.round(a.noiseOpacity * 255); |
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|
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for (var i = 0; i < data.length; i += 4) { |
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var v = Math.random() * 255 | 0; |
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data[i] = tintR || v; |
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data[i+1] = tintG || v; |
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data[i+2] = tintB || v; |
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data[i+3] = alpha; |
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} |
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ctx.putImageData(imageData, 0, 0); |
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} |
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|
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function loop(now) { |
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drawNoise(now); |
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rafId = requestAnimationFrame(loop); |
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} |
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|
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resizeCanvas(); |
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window.addEventListener('resize', resizeCanvas); |
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|
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if ('IntersectionObserver' in window) { |
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var obs = new IntersectionObserver(function(entries) { |
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if (entries[0].isIntersecting) { if (!rafId) rafId = requestAnimationFrame(loop); } |
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else { if (rafId) { cancelAnimationFrame(rafId); rafId = null; } } |
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}, { threshold: 0 }); |
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obs.observe(section); |
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} else { |
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rafId = requestAnimationFrame(loop); |
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} |
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} |
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|
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document.querySelectorAll('.bkbg-ns-app').forEach(initNoiseSection); |
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})(); |
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|
