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adds word sphere for knowledge graph
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,144 @@ | ||
| (function() { | ||
| const canvas = document.getElementById('canvas'); | ||
|
|
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| const texts = [ | ||
| 'HTML5', 'Javascript', 'C', 'C++', 'AVR C', 'Docker', | ||
| 'CSS3', 'Python', 'Java', 'MongoDB', 'Bootstrap', | ||
| 'ReactJS', 'jQuery', 'ExpressJS', 'Webpack', 'Gulp', | ||
| 'NodeJS', 'Redux', 'Mocha', 'Chai', 'Photoshop', 'Flash' | ||
| ]; | ||
| const counts = [1,2,4,5,4,2,1]; | ||
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||
| const options = { | ||
| tilt: Math.PI / 9, | ||
| initialVelocityX: 0.09, | ||
| initialVelocityY: 0.09, | ||
| initialRotationX: Math.PI * 0.14, | ||
| initialRotationZ: 0, | ||
| }; | ||
|
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| wordSphere(canvas, texts, counts, options); | ||
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| /** | ||
| * WordSphere | ||
| * Written by Hyojun Kim in 2017. Licensed in MIT. | ||
| */ | ||
| function wordSphere(canvas, texts, counts, options) { | ||
| const π = Math.PI; // happy math! | ||
| const { | ||
| width = 500, | ||
| height = 500, | ||
| radius = 150, | ||
| padding = 50, | ||
| fontSize = 22, | ||
| tilt = 0, | ||
| initialVelocityX = 0, | ||
| initialVelocityY = 0, | ||
| initialRotationX = 0, | ||
| initialRotationZ = 0, | ||
| } = options; | ||
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| let vx = initialVelocityX, vy = initialVelocityY; | ||
| let rx = initialRotationX, rz = initialRotationZ; | ||
|
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| // canvas setup | ||
| let ctx = canvas.getContext('2d'); | ||
| ctx.textAlign = 'center'; | ||
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| // Hi-DPI support | ||
| canvas.width = width * 2; | ||
| canvas.height = height * 2; | ||
| canvas.style.width = `${width}px`; | ||
| canvas.style.height = `${height}px`; | ||
| ctx.scale(2,2); | ||
|
|
||
| // scrolling | ||
| let clicked = false, lastX, lastY; | ||
| canvas.addEventListener('mousedown', event => { | ||
| clicked = true; | ||
| lastX = event.screenX; | ||
| lastY = event.screenY; | ||
| }); | ||
| canvas.addEventListener('mousemove', event => { | ||
| if (!clicked) return; | ||
| [dx, dy] = [event.screenX - lastX, event.screenY - lastY]; | ||
| [lastX, lastY] = [event.screenX, event.screenY]; | ||
|
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| // rotation update | ||
| rz += -dy * 0.01; | ||
| rx += dx * 0.01; | ||
|
|
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| // velocity update | ||
| vx = dx * 0.1; | ||
| vy = dy * 0.1; | ||
|
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| if (!looping) startLoop(); | ||
| }); | ||
| canvas.addEventListener('mouseup', e => clicked = false); | ||
| canvas.addEventListener('mouseleave', e => clicked = false); | ||
|
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| function rot(x,y,t) { | ||
| return [x*Math.cos(t)-y*Math.sin(t), x*Math.sin(t)+y*Math.cos(t)]; | ||
| } | ||
|
|
||
| function render() { | ||
| ctx.clearRect(0, 0, canvas.width, canvas.height); | ||
|
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| let ix = 0, iz = 0, i = 1; | ||
| for (const text of texts) { | ||
| const degZ = (π/(counts.length-1)) * iz; | ||
| const degX = (2*π/counts[iz]) * ix; | ||
|
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| let x = radius * Math.sin(degZ) * Math.cos(degX); | ||
| let y = radius * Math.sin(degZ) * Math.sin(degX); | ||
| let z = radius * Math.cos(degZ) + 8*(ix % 2) /* randomness */; | ||
|
|
||
| // camera transform | ||
| [y,z] = rot(y, z, tilt); | ||
| [x,z] = rot(x, z, rz); | ||
| [x,y] = rot(x, y, rx); | ||
|
|
||
| // convert to cartesian and then draw. | ||
| const alpha = 0.6 + 0.4 * (x/radius); | ||
| const size = fontSize + 2 + 5*(x/radius); | ||
| ctx.fillStyle = `rgba(250,250,240,${alpha})`; | ||
| ctx.font = `${size}px "Courgette", cursive, sans-serif`; | ||
| ctx.fillText(text, y + width/2, -z + height/2); | ||
|
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| ix--; | ||
| if (ix < 0) { | ||
| iz++; | ||
| ix = counts[iz] - 1; | ||
| } | ||
| i++; | ||
| } | ||
| } | ||
|
|
||
| // renderer | ||
| let looping = false; | ||
| function rendererLoop() { | ||
| if (looping) window.requestAnimationFrame(rendererLoop); | ||
| render(); | ||
|
|
||
| // deacceleration - dirty code xD | ||
| if (vx > 0) vx = vx - 0.01; | ||
| if (vy > 0) vy = vy - 0.01; | ||
| if (vx < 0) vx = vx + 0.01; | ||
| if (vy > 0) vy = vy + 0.01; | ||
| if (vx == 0 && vy == 0) stopLoop(); | ||
|
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| rz += vy * 0.01; | ||
| rx += vx * 0.01; | ||
| } | ||
|
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| function startLoop() { | ||
| looping = true; | ||
| window.requestAnimationFrame(rendererLoop); | ||
| } | ||
|
|
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| function stopLoop() { | ||
| looping = false; | ||
| } | ||
| startLoop(); | ||
| } | ||
| })(); |