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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,239 @@ | ||
| // oneko.js: https://github.com/adryd325/oneko.js | ||
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| (function oneko() { | ||
| const isReducedMotion = | ||
| window.matchMedia(`(prefers-reduced-motion: reduce)`) === true || | ||
| window.matchMedia(`(prefers-reduced-motion: reduce)`).matches === true; | ||
|
|
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| if (isReducedMotion) return; | ||
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| const nekoEl = document.createElement("div"); | ||
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| let nekoPosX = 32; | ||
| let nekoPosY = 32; | ||
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| let mousePosX = 0; | ||
| let mousePosY = 0; | ||
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| let frameCount = 0; | ||
| let idleTime = 0; | ||
| let idleAnimation = null; | ||
| let idleAnimationFrame = 0; | ||
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| const nekoSpeed = 10; | ||
| const spriteSets = { | ||
| idle: [[-3, -3]], | ||
| alert: [[-7, -3]], | ||
| scratchSelf: [ | ||
| [-5, 0], | ||
| [-6, 0], | ||
| [-7, 0], | ||
| ], | ||
| scratchWallN: [ | ||
| [0, 0], | ||
| [0, -1], | ||
| ], | ||
| scratchWallS: [ | ||
| [-7, -1], | ||
| [-6, -2], | ||
| ], | ||
| scratchWallE: [ | ||
| [-2, -2], | ||
| [-2, -3], | ||
| ], | ||
| scratchWallW: [ | ||
| [-4, 0], | ||
| [-4, -1], | ||
| ], | ||
| tired: [[-3, -2]], | ||
| sleeping: [ | ||
| [-2, 0], | ||
| [-2, -1], | ||
| ], | ||
| N: [ | ||
| [-1, -2], | ||
| [-1, -3], | ||
| ], | ||
| NE: [ | ||
| [0, -2], | ||
| [0, -3], | ||
| ], | ||
| E: [ | ||
| [-3, 0], | ||
| [-3, -1], | ||
| ], | ||
| SE: [ | ||
| [-5, -1], | ||
| [-5, -2], | ||
| ], | ||
| S: [ | ||
| [-6, -3], | ||
| [-7, -2], | ||
| ], | ||
| SW: [ | ||
| [-5, -3], | ||
| [-6, -1], | ||
| ], | ||
| W: [ | ||
| [-4, -2], | ||
| [-4, -3], | ||
| ], | ||
| NW: [ | ||
| [-1, 0], | ||
| [-1, -1], | ||
| ], | ||
| }; | ||
|
|
||
| function init() { | ||
| nekoEl.id = "oneko"; | ||
| nekoEl.ariaHidden = true; | ||
| nekoEl.style.width = "32px"; | ||
| nekoEl.style.height = "32px"; | ||
| nekoEl.style.position = "fixed"; | ||
| nekoEl.style.pointerEvents = "none"; | ||
| nekoEl.style.imageRendering = "pixelated"; | ||
| nekoEl.style.left = `${nekoPosX - 16}px`; | ||
| nekoEl.style.top = `${nekoPosY - 16}px`; | ||
| nekoEl.style.zIndex = 2147483647; | ||
|
|
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| let nekoFile = "./neko/oneko.gif" | ||
| const curScript = document.currentScript | ||
| if (curScript && curScript.dataset.cat) { | ||
| nekoFile = curScript.dataset.cat | ||
| } | ||
| nekoEl.style.backgroundImage = `url(${nekoFile})`; | ||
|
|
||
| document.body.appendChild(nekoEl); | ||
|
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| document.addEventListener("mousemove", function (event) { | ||
| mousePosX = event.clientX; | ||
| mousePosY = event.clientY; | ||
| }); | ||
|
|
||
| window.requestAnimationFrame(onAnimationFrame); | ||
| } | ||
|
|
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| let lastFrameTimestamp; | ||
|
|
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| function onAnimationFrame(timestamp) { | ||
| // Stops execution if the neko element is removed from DOM | ||
| if (!nekoEl.isConnected) { | ||
| return; | ||
| } | ||
| if (!lastFrameTimestamp) { | ||
| lastFrameTimestamp = timestamp; | ||
| } | ||
| if (timestamp - lastFrameTimestamp > 100) { | ||
| lastFrameTimestamp = timestamp | ||
| frame() | ||
| } | ||
| window.requestAnimationFrame(onAnimationFrame); | ||
| } | ||
|
|
||
| function setSprite(name, frame) { | ||
| const sprite = spriteSets[name][frame % spriteSets[name].length]; | ||
| nekoEl.style.backgroundPosition = `${sprite[0] * 32}px ${sprite[1] * 32}px`; | ||
| } | ||
|
|
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| function resetIdleAnimation() { | ||
| idleAnimation = null; | ||
| idleAnimationFrame = 0; | ||
| } | ||
|
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| function idle() { | ||
| idleTime += 1; | ||
|
|
||
| // every ~ 20 seconds | ||
| if ( | ||
| idleTime > 10 && | ||
| Math.floor(Math.random() * 200) == 0 && | ||
| idleAnimation == null | ||
| ) { | ||
| let avalibleIdleAnimations = ["sleeping", "scratchSelf"]; | ||
| if (nekoPosX < 32) { | ||
| avalibleIdleAnimations.push("scratchWallW"); | ||
| } | ||
| if (nekoPosY < 32) { | ||
| avalibleIdleAnimations.push("scratchWallN"); | ||
| } | ||
| if (nekoPosX > window.innerWidth - 32) { | ||
| avalibleIdleAnimations.push("scratchWallE"); | ||
| } | ||
| if (nekoPosY > window.innerHeight - 32) { | ||
| avalibleIdleAnimations.push("scratchWallS"); | ||
| } | ||
| idleAnimation = | ||
| avalibleIdleAnimations[ | ||
| Math.floor(Math.random() * avalibleIdleAnimations.length) | ||
| ]; | ||
| } | ||
|
|
||
| switch (idleAnimation) { | ||
| case "sleeping": | ||
| if (idleAnimationFrame < 8) { | ||
| setSprite("tired", 0); | ||
| break; | ||
| } | ||
| setSprite("sleeping", Math.floor(idleAnimationFrame / 4)); | ||
| if (idleAnimationFrame > 192) { | ||
| resetIdleAnimation(); | ||
| } | ||
| break; | ||
| case "scratchWallN": | ||
| case "scratchWallS": | ||
| case "scratchWallE": | ||
| case "scratchWallW": | ||
| case "scratchSelf": | ||
| setSprite(idleAnimation, idleAnimationFrame); | ||
| if (idleAnimationFrame > 9) { | ||
| resetIdleAnimation(); | ||
| } | ||
| break; | ||
| default: | ||
| setSprite("idle", 0); | ||
| return; | ||
| } | ||
| idleAnimationFrame += 1; | ||
| } | ||
|
|
||
| function frame() { | ||
| frameCount += 1; | ||
| const diffX = nekoPosX - mousePosX; | ||
| const diffY = nekoPosY - mousePosY; | ||
| const distance = Math.sqrt(diffX ** 2 + diffY ** 2); | ||
|
|
||
| if (distance < nekoSpeed || distance < 48) { | ||
| idle(); | ||
| return; | ||
| } | ||
|
|
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| idleAnimation = null; | ||
| idleAnimationFrame = 0; | ||
|
|
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| if (idleTime > 1) { | ||
| setSprite("alert", 0); | ||
| // count down after being alerted before moving | ||
| idleTime = Math.min(idleTime, 7); | ||
| idleTime -= 1; | ||
| return; | ||
| } | ||
|
|
||
| let direction; | ||
| direction = diffY / distance > 0.5 ? "N" : ""; | ||
| direction += diffY / distance < -0.5 ? "S" : ""; | ||
| direction += diffX / distance > 0.5 ? "W" : ""; | ||
| direction += diffX / distance < -0.5 ? "E" : ""; | ||
| setSprite(direction, frameCount); | ||
|
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| nekoPosX -= (diffX / distance) * nekoSpeed; | ||
| nekoPosY -= (diffY / distance) * nekoSpeed; | ||
|
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| nekoPosX = Math.min(Math.max(16, nekoPosX), window.innerWidth - 16); | ||
| nekoPosY = Math.min(Math.max(16, nekoPosY), window.innerHeight - 16); | ||
|
|
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| nekoEl.style.left = `${nekoPosX - 16}px`; | ||
| nekoEl.style.top = `${nekoPosY - 16}px`; | ||
| } | ||
|
|
||
| init(); | ||
| })(); |