51 lines
1.1 KiB
JavaScript
51 lines
1.1 KiB
JavaScript
const rand = ( min, max ) =>
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( undefined == max )
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? ( Math.random() * min )
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: ( Math.random() * (max - min) + min )
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const starCount = 2400
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, maxRaduis = 500
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let canvas = document.querySelector('canvas')
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, starGroup
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, stars = [ ]
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ill = new Zdog.Illustration
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({ element: canvas
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, dragRotate: true
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})
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starGroup = new Zdog.Group({ addTo: ill })
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for( let i = 1; i < starCount; i++ )
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{ const R = rand( maxRaduis )
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, F = rand( 2 * Math.PI )
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, T = rand( Math.PI )
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, x = R * Math.sin( F ) * Math.cos( T )
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, y = R * Math.sin( F ) * Math.sin( T )
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, z = R * Math.cos( F )
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, stroke = ( maxRaduis - R ) / 25 + 5
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, Hue = R * 360 / maxRaduis - 60
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, color = `hsl(${Hue}, 100%, 50%)`
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stars.push({ shape: new Zdog.Shape(
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{ addTo: starGroup
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, translate: { x, y, z }
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, stroke
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, color
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})
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})
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}
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const animate = ( ) =>
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{ starGroup.rotate.y += 0.001
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starGroup.rotate.x -= 0.001
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starGroup.rotate.z -= 0.001
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ill.updateRenderGraph( )
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window.requestAnimationFrame( animate )
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}
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animate( )
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