Render performance
import io.data2viz.color.*
import io.data2viz.geom.*
import io.data2viz.math.*
import io.data2viz.viz.*
import io.data2viz.random.*
import kotlin.math.sin
import kotlin.math.cos
private val vizSize = 600.0
private val circles = 1000
private val randomPosition = RandomDistribution.uniform(.0, vizSize)
private val randomSpeed = RandomDistribution.uniform(-2.0, 2.0)
private val positions = (0 .. circles).map { Point(randomPosition(), randomPosition()) }.toMutableList()
private val speeds = (0 .. circles).map { Point(randomSpeed(), randomSpeed()) }.toMutableList()
private fun updatePositions() = positions.forEachIndexed { index, position ->
val newPos = position + speeds[index]
positions[index] = newPos
if (newPos.x < .0 || newPos.x > vizSize) {
speeds[index] = Point(-speeds[index].x, speeds[index].y)
}
if (newPos.y < .0 || newPos.y > vizSize) {
speeds[index] = Point(speeds[index].x, -speeds[index].y)
}
}
fun main() {
viz {
size = size(vizSize, vizSize)
val elements = positions.map { position ->
circle {
x = position.x
y = position.y
radius = 5.0
fill = Colors.Web.red
}
}
animation {
updatePositions()
elements.forEachIndexed { index, element ->
element.x = positions[index].x
element.y = positions[index].y
}
}
}.bindRendererOnNewCanvas()
}
Sketch created by
pierre
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