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| Original file line number | Diff line number | Diff line change |
|---|---|---|
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@@ -59,6 +59,9 @@ | |
| top: 0; | ||
| left: 0; | ||
| } | ||
| #box { | ||
| mix-blend-mode: difference; | ||
| } | ||
| #overlay { | ||
| mix-blend-mode: overlay; | ||
| } | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,46 +1,90 @@ | ||
| // Only run this code on non-mobile devices | ||
| if (detectMobile()) { | ||
| const box = document.getElementById("box"); | ||
| const overlay = document.getElementById("overlay"); | ||
| let hueIndex = 0; | ||
| let intervalCount = 0; | ||
| let isWindowActive = true; | ||
| window.addEventListener('focus', () => isWindowActive = true); | ||
| window.addEventListener('blur', () => isWindowActive = false); | ||
| function getRandomHueIncrement() {return Math.random() < 0.5 ? Math.random() * -.75 - .75 : Math.random() * .75 + .75;} | ||
| let hueIncrement = getRandomHueIncrement(); | ||
| function getIntervalsTillNextChange() {return Math.floor(Math.random() * 66) + 33;} | ||
| let intervalsTillNextChange = getIntervalsTillNextChange(); | ||
| const HUE_STEP = 360 / 7; | ||
| function getAdjustedHue(index, step) {return (index + step * HUE_STEP + 360) % 360;} | ||
| function setGradient(element, index) { | ||
| const width = element.offsetWidth; | ||
| const height = element.offsetHeight; | ||
| const diagonal = Math.sqrt(width * width + height * height); | ||
| const percentage = (diagonal / (Math.max(width, height) * Math.sqrt(2))) * 100; | ||
| let gradients = []; | ||
| for (let i = 0; i < 7; i++) { | ||
| const angle = i * (360 / 7); | ||
| const x = 50 + 50 * Math.cos(angle * Math.PI / 180); | ||
| const y = 50 + 50 * Math.sin(angle * Math.PI / 180); | ||
| gradients.push(`radial-gradient(ellipse farthest-corner at ${x}% ${y}%, hsl(${getAdjustedHue(index, i)}, 100%, 50%), transparent ${percentage}%)`); | ||
| } | ||
| element.style.backgroundImage = gradients.join(', '); | ||
| } | ||
| function updateColors() { | ||
| const box = document.getElementById("box"); | ||
| const overlay = document.getElementById("overlay"); | ||
| let isWindowActive = true; | ||
| window.addEventListener('focus', () => isWindowActive = true); | ||
| window.addEventListener('blur', () => isWindowActive = false); | ||
| function getRandomHueIncrement() { | ||
| return Math.random() < 0.5 ? Math.random() * -0.75 - 0.75 : Math.random() * 0.75 + 0.75; | ||
| } | ||
| function getIntervalsTillNextChange() { | ||
| return Math.floor(Math.random() * 72) + 72; | ||
| } | ||
| function getRandomOverlayOffset() { | ||
| return Math.random() * 11 + 3; | ||
| } | ||
| const BOX_HUE_STEP = 7; | ||
| const BOX_HUE_ANGLE = 360 / BOX_HUE_STEP; | ||
| function getAdjustedHue(index, step, hueAngle) { | ||
| return (index + step * hueAngle + 360) % 360; | ||
| } | ||
| function createLayerState(isOverlay) { | ||
| return { | ||
| hueIndex: 0, | ||
| hueIncrement: getRandomHueIncrement(), | ||
| intervalCount: 0, | ||
| intervalsTillNextChange: getIntervalsTillNextChange(), | ||
| currentOverlayOffset: isOverlay ? getRandomOverlayOffset() : 0, | ||
| targetOverlayOffset: isOverlay ? getRandomOverlayOffset() : 0, | ||
| transitionProgress: 0, | ||
| transitionDuration: isOverlay ? getIntervalsTillNextChange() : 0, | ||
| hueStep: isOverlay ? getRandomOverlayOffset() : BOX_HUE_STEP | ||
| }; | ||
| } | ||
| let boxState = createLayerState(false); | ||
| let overlayState = createLayerState(true); | ||
| function easeInOutCubic(t) { | ||
| return t < 0.5 ? 4 * t * t * t : 1 - Math.pow(-2 * t + 2, 3) / 2; | ||
| } | ||
| function setGradient(element, state, isOverlay = false) { | ||
| const width = element.offsetWidth; | ||
| const height = element.offsetHeight; | ||
| const diagonal = Math.sqrt(width * width + height * height); | ||
| const percentage = (diagonal / (Math.max(width, height) * Math.sqrt(2))) * 100; | ||
| let gradients = []; | ||
| const hueStep = state.hueStep; | ||
| const hueAngle = 360 / hueStep; | ||
| for (let i = 0; i < hueStep; i++) { | ||
| const angle = i * hueAngle; | ||
| const x = 50 + 50 * Math.cos(angle * Math.PI / 180); | ||
| const y = 50 + 50 * Math.sin(angle * Math.PI / 180); | ||
| const currentStep = isOverlay ? i + state.currentOverlayOffset : i; | ||
| gradients.push(`radial-gradient(ellipse farthest-corner at ${x}% ${y}%, hsl(${getAdjustedHue(state.hueIndex, currentStep, hueAngle)}, 100%, 50%), transparent ${percentage}%)`); | ||
| } | ||
| element.style.backgroundImage = gradients.join(', '); | ||
| } | ||
| function updateLayerState(state, isOverlay) { | ||
| state.hueIndex = (state.hueIndex + state.hueIncrement + 360) % 360; | ||
| state.intervalCount++; | ||
| if (state.intervalCount >= state.intervalsTillNextChange) { | ||
| state.hueIncrement = getRandomHueIncrement(); | ||
| if (isOverlay) { | ||
| state.targetOverlayOffset = getRandomOverlayOffset(); | ||
| state.transitionDuration = getIntervalsTillNextChange(); | ||
| } | ||
| state.intervalCount = 0; | ||
| state.intervalsTillNextChange = getIntervalsTillNextChange(); | ||
| } | ||
| if (isOverlay) { | ||
| state.transitionProgress += .002 / state.transitionDuration; | ||
| if (state.transitionProgress >= 1) { | ||
| state.transitionProgress = 0; | ||
| state.currentOverlayOffset = state.targetOverlayOffset; | ||
| } else { | ||
| state.currentOverlayOffset += (state.targetOverlayOffset - state.currentOverlayOffset) * easeInOutCubic(state.transitionProgress); | ||
| } | ||
| } | ||
| } | ||
| function updateColors() { | ||
| if (isWindowActive) { | ||
| hueIndex = (hueIndex + hueIncrement + 360) % 360; | ||
| intervalCount++; | ||
| if (intervalCount >= intervalsTillNextChange) { | ||
| hueIncrement = getRandomHueIncrement(); | ||
| intervalCount = 0; | ||
| intervalsTillNextChange = getIntervalsTillNextChange(); | ||
| updateLayerState(boxState, false); | ||
| updateLayerState(overlayState, true); | ||
| setGradient(box, boxState); | ||
| setGradient(overlay, overlayState, true); | ||
| } | ||
| setGradient(box, hueIndex); | ||
| setGradient(overlay, 360 - hueIndex); | ||
| } | ||
| } | ||
| setGradient(box, 0); | ||
| setGradient(overlay, 360); | ||
| setInterval(updateColors, 33); | ||
| setGradient(box, boxState); | ||
| setGradient(overlay, overlayState, true); | ||
| setInterval(updateColors, 33); | ||
| } |
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