103 lines
3.3 KiB
Kotlin
103 lines
3.3 KiB
Kotlin
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import kotlinx.coroutines.delay
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import kotlinx.coroutines.isActive
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import kotlinx.coroutines.launch
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import kotlinx.css.*
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import react.RProps
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import react.child
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import react.functionalComponent
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import space.kscience.dataforge.context.Context
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import space.kscience.plotly.models.Trace
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import space.kscience.visionforge.markup.VisionOfMarkup
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import space.kscience.visionforge.react.flexRow
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import space.kscience.visionforge.ring.ThreeCanvasWithControls
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import space.kscience.visionforge.ring.solid
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import space.kscience.visionforge.solid.*
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import styled.css
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import styled.styledDiv
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import kotlin.math.sqrt
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external interface DemoProps : RProps {
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var context: Context
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}
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val GravityDemo = functionalComponent<DemoProps> { props ->
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val velocityTrace = Trace{
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name = "velocity"
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}
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val energyTrace = Trace{
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name = "energy"
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}
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val markup = VisionOfMarkup()
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styledDiv {
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css {
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height = 100.vh - 50.pt
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}
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styledDiv {
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css {
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height = 50.vh
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}
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child(ThreeCanvasWithControls) {
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attrs {
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context = props.context
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solid {
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sphere(5.0, "ball") {
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detail = 16
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color("red")
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val h = 100.0
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y = h
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context.launch {
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val g = 10.0
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val dt = 0.1
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var time = 0.0
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var velocity = 0.0
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while (isActive) {
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delay(20)
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time += dt
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velocity -= g * dt
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val energy = g * y.toDouble() + velocity * velocity / 2
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y = y.toDouble() + velocity * dt
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velocityTrace.appendXYLatest(time, y)
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energyTrace.appendXYLatest(time, energy)
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if (y.toDouble() <= 2.5) {
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//conservation of energy
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velocity = sqrt(2 * g * h)
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}
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markup.content = """
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## Bouncing sphere parameters
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**velocity** = $velocity
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**energy** = $energy
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""".trimIndent()
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}
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}
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}
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box(200, 5, 200, name = "floor") {
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y = -2.5
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}
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}
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}
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}
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}
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flexRow {
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css {
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alignContent = Align.stretch
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alignItems = Align.stretch
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height = 50.vh - 50.pt
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}
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plotly {
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traces(velocityTrace)
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}
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Markup {
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attrs {
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this.markup = markup
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}
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}
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}
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}
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}
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