37 lines
1.2 KiB
Kotlin
37 lines
1.2 KiB
Kotlin
package ordering
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import org.openrndr.application
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import org.openrndr.color.ColorRGBa
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import org.openrndr.extra.noise.uniform
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import org.openrndr.extra.shapes.ordering.hilbertOrder
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import kotlin.random.Random
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/**
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* Shows the difference between sorting the same random points in 2D (in red) and in 3D (in blue).
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*
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* To be able to sort the points in 3D, the 2D points are temporarily converted to 3D with 0.0 as the `z` component,
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* sorted, then converted back to 2D discarding the `z` component.
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*
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* Try out the alternative `mortonOrder` as well.
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*
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* Note that the `bits` argument can be either 5 or 16 in 2D, and 5 or 10 in 3D, other values are not supported.
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*/
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fun main() = application {
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configure {
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width = 720
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height = 720
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}
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program {
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val points = drawer.bounds.offsetEdges(-20.0).uniform(400, Random(0))
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val sortedPoints0 = points.hilbertOrder(bits = 16, scale = 1.0)
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val sortedPoints1 = points.map { it.xy0 }.hilbertOrder(bits = 10, scale = 1.0).map { it.xy }
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extend {
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drawer.clear(ColorRGBa.PINK)
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drawer.stroke = ColorRGBa.RED
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drawer.lineStrip(sortedPoints0)
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drawer.stroke = ColorRGBa.BLUE
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drawer.lineStrip(sortedPoints1)
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}
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}
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}
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