Created
April 21, 2021 03:06
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| fun main() = application { | |
| configure { | |
| width = 500 | |
| height = 500 | |
| } | |
| program { | |
| val size = 3 * width / 4.0 | |
| val easer = SineInOut() | |
| val duration = 50.0 | |
| var frame = 0 | |
| val mapEase = { left: Double, right: Double, ease: Double -> | |
| map(0.0, 1.0, left, right, ease) | |
| } | |
| val mapSinEase = { left: Double, right: Double, ease: Double -> | |
| sin(mapEase(left, right, ease)) | |
| } | |
| extend { | |
| drawer.clear(ColorRGBa.BLACK) | |
| drawer.translate(width / 2.0, height / 2.0) | |
| drawer.drawStyle.blendMode = BlendMode.ADD | |
| for (i in 1..20) { | |
| val ringOffset = i * 48.18; | |
| val radius = map(1.0, 20.0, 30.0, size / 2, i.toDouble()) | |
| val maxW = map(1.0, 20.0, 1.0, 7.0, i.toDouble()) | |
| val positions = ((radius / maxW) * 3.2).roundToInt() | |
| val points = Circle(0.0, 0.0, radius).contour.equidistantPositions(positions) | |
| val rot = (360.0 / positions) * (positions / 4) | |
| drawer.circles { | |
| points.forEachIndexed { index, position -> | |
| if (index == points.size - 1) return@circles | |
| val pos = position.rotate(rot) | |
| val theta = atan2(pos.y, pos.x) | |
| val maxPos = Vector2( | |
| x = (radius * 1.3) * cos(theta), | |
| y = (radius * 1.3) * sin(theta) | |
| ) | |
| val pointOffset = map(0.0, positions.toDouble(), 0.0, 50.0, index.toDouble()); | |
| val pointTime = (frameCount + ringOffset + pointOffset) % duration | |
| val ease = easer.ease(pointTime, 0.0, 1.0, duration) | |
| val x = mapEase(pos.x, maxPos.x, ease) | |
| val y = mapEase(pos.y, maxPos.y, ease) | |
| val alpha1 = mapSinEase(PI * 0.65, PI.div(2.0).div(16.0), ease) | |
| val alpha2 = mapSinEase(PI.div(2.0).div(6.0), PI * 0.4, ease) | |
| val alpha3 = mapSinEase(0.0, PI - PI.div(2.0).div(6.0), ease) | |
| var wAdjusted = mapSinEase(0.0, PI, ease) * maxW | |
| wAdjusted = if (wAdjusted < 0.5) 0.0 else wAdjusted | |
| stroke = null | |
| fill = ColorRGBa(1.0, 0.0, 0.0, alpha1) | |
| circle(x - (wAdjusted * 0.7), y, wAdjusted) | |
| fill = ColorRGBa(0.0, 0.0, 1.0, alpha2) | |
| circle(x + (wAdjusted * 0.7), y, wAdjusted) | |
| fill = ColorRGBa(0.0, 1.0, 0.0, alpha3) | |
| circle(x, y, wAdjusted) | |
| } | |
| } | |
| } | |
| } | |
| } | |
| } |
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