Seems to be working... finally
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@ -57,6 +57,10 @@ fun FeatureGroup<XY>.obstacle(obstacle: Obstacle, colorPicker: (Trajectory2D) ->
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polygon(obstacle.arcs.map { it.center.toXY() }).color(Color.Gray)
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}
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fun FeatureGroup<XY>.pose(pose2D: Pose2D) = with(Euclidean2DSpace){
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line(pose2D.toXY(), (pose2D + Pose2D.bearingToVector(pose2D.bearing)).toXY() )
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}
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@Composable
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@Preview
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fun closePoints() {
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@ -120,10 +124,14 @@ fun doubleObstacle() {
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)
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obstacles.forEach { obstacle(it) }
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val enter = Pose2D(-5, -1, Angle.pi / 4)
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val exit = Pose2D(20, 4, Angle.pi * 3 / 4)
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pose(enter)
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pose(exit)
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Obstacles.avoidObstacles(
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Pose2D(-5, -1, Angle.pi / 4),
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Pose2D(20, 4, Angle.pi * 3 / 4),
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enter,
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exit,
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0.5,
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*obstacles
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).forEach {
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@ -137,7 +145,9 @@ fun doubleObstacle() {
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@Preview
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fun playground() {
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val examples = listOf(
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"Close starting points"
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"Close starting points",
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"Single obstacle",
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"Two obstacles",
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)
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var currentExample by remember { mutableStateOf(examples.first()) }
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@ -153,6 +163,8 @@ fun playground() {
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}) {
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when (currentExample) {
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examples[0] -> closePoints()
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examples[1] -> singleObstacle()
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examples[2] -> doubleObstacle()
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}
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}
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}
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@ -2,6 +2,7 @@ package space.kscience.kmath.geometry
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import space.kscience.kmath.operations.DoubleField.pow
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import space.kscience.trajectory.*
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import kotlin.math.abs
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import kotlin.math.sign
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public fun Euclidean2DSpace.circle(x: Number, y: Number, radius: Number): Circle2D =
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@ -71,3 +72,14 @@ public fun Circle2D.tangent(bearing: Angle, direction: Trajectory2D.Direction):
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Pose2D(coordinates, tangentAngle)
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}
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public fun CircleTrajectory2D.containsPoint(point: DoubleVector2D): Boolean = with(Euclidean2DSpace) {
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val radiusVector = point - center
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if (abs(norm(radiusVector) - circle.radius) > 1e-4 * circle.radius) error("Wrong radius")
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val radiusVectorBearing = radiusVector.bearing
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val offset = (radiusVectorBearing - arcStart).normalized()
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when {
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arcAngle >= Angle.zero -> offset < arcAngle
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else -> arcAngle < offset - Angle.piTimes2
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}
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}
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@ -101,7 +101,7 @@ public class Obstacles(public val obstacles: List<Obstacle>) {
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obstacleIndex: Int,
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obstacleDirection: Trajectory2D.Direction,
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arc: CircleTrajectory2D
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): ObstacleTangent? = with(Euclidean2DSpace) {
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): ObstacleTangent = with(Euclidean2DSpace) {
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val obstacle = obstacles[obstacleIndex]
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for (circleIndex in obstacle.arcs.indices) {
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val obstacleArc = obstacle.arcs[circleIndex]
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@ -118,7 +118,7 @@ public class Obstacles(public val obstacles: List<Obstacle>) {
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)
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}
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}
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return null
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error("Tangent from obstacle $obstacleIndex to circle ${arc.circle} not found")
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}
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@ -206,7 +206,7 @@ public class Obstacles(public val obstacles: List<Obstacle>) {
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connection.obstacleIndex,
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connection.direction,
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endArc
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) ?: return emptySet()
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) ?: error("No tangents between obstacle and endpoint")
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if (remainingObstacleIndices.none { obstacles[it].intersects(tangentToEnd.tangentTrajectory) }) return setOf(
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TangentPath(tangents + tangentToEnd)
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@ -1,8 +1,6 @@
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package space.kscience.trajectory
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import space.kscience.kmath.geometry.Circle2D
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import space.kscience.kmath.geometry.DoubleVector2D
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import space.kscience.kmath.geometry.Euclidean2DSpace
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import space.kscience.kmath.geometry.*
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import space.kscience.trajectory.DubinsPath.Type
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import kotlin.math.*
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@ -66,19 +64,8 @@ internal fun tangentsBetweenCircles(
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internal fun tangentsBetweenArcs(
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first: CircleTrajectory2D,
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second: CircleTrajectory2D,
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): Map<Type, StraightTrajectory2D> {
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fun CircleTrajectory2D.containsPoint(point: DoubleVector2D): Boolean = with(Euclidean2DSpace){
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val radiusVectorBearing = (point - center).bearing
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return when(direction){
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Trajectory2D.L -> radiusVectorBearing in arcEnd..arcStart
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Trajectory2D.R -> radiusVectorBearing in arcStart..arcEnd
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}
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}
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return tangentsBetweenCircles(first.circle, second.circle).filterValues {
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first.containsPoint(it.begin) && second.containsPoint(it.end)
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}
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): Map<Type, StraightTrajectory2D> = tangentsBetweenCircles(first.circle, second.circle).filterValues {
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first.containsPoint(it.begin) && second.containsPoint(it.end)
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}
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/**
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@ -86,7 +73,7 @@ internal fun tangentsBetweenArcs(
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*/
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public fun Obstacle.circumvention(direction: Trajectory2D.Direction, fromIndex: Int): CompositeTrajectory2D {
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require(fromIndex in arcs.indices) { "$fromIndex is not in ${arcs.indices}" }
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val startCircle = arcs[fromIndex]
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val startCircle = arcs[fromIndex].circle
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val segments = buildList {
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val reserve = mutableListOf<Trajectory2D>()
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@ -96,7 +83,7 @@ public fun Obstacle.circumvention(direction: Trajectory2D.Direction, fromIndex:
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}
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var i = 0
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while (sourceSegments[i] !== startCircle) {
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while ((sourceSegments[i] as? CircleTrajectory2D)?.circle !== startCircle) {
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//put all segments before target circle on the reserve
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reserve.add(sourceSegments[i])
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i++
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@ -124,7 +111,7 @@ public fun Obstacle.circumvention(
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toIndex: Int,
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): CompositeTrajectory2D {
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require(toIndex in arcs.indices) { "$toIndex is not in ${arcs.indices}" }
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val toCircle = arcs[toIndex]
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val toCircle = arcs[toIndex].circle
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val fullCircumvention = circumvention(direction, fromIndex).segments
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return CompositeTrajectory2D(
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buildList {
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@ -133,7 +120,7 @@ public fun Obstacle.circumvention(
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val segment = fullCircumvention[i]
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add(segment)
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i++
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} while (segment !== toCircle)
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} while ((segment as? CircleTrajectory2D)?.circle !== toCircle)
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}
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)
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}
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@ -11,6 +11,8 @@ import space.kscience.trajectory.Trajectory2D
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import kotlin.math.PI
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import kotlin.test.Test
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import kotlin.test.assertEquals
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import kotlin.test.assertFalse
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import kotlin.test.assertTrue
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class ArcTests {
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@ -34,9 +36,26 @@ class ArcTests {
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val arc = CircleTrajectory2D(
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circle,
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Pose2D(x = 2.0, y = 1.2246467991473532E-16, bearing = PI.radians),
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Pose2D(x = 1.0, y = -1.0, bearing = (PI*3/2).radians)
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Pose2D(x = 1.0, y = -1.0, bearing = (PI * 3 / 2).radians)
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)
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assertEquals(Trajectory2D.R, arc.direction)
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assertEquals(PI / 2, arc.length, 1e-4)
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}
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@Test
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fun arcContains() = with(Euclidean2DSpace) {
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val circle = circle(0, 0, 1.0)
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val arc1 = CircleTrajectory2D(circle, Angle.pi / 4, Angle.piDiv2)
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assertTrue { arc1.containsPoint(vector(1, 0)) }
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assertFalse { arc1.containsPoint(vector(0, 1)) }
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assertFalse { arc1.containsPoint(vector(-1, 0)) }
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val arc2 = CircleTrajectory2D(circle, Angle.pi / 4, -Angle.piDiv2 * 3)
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assertEquals(Trajectory2D.L, arc2.direction)
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assertFalse { arc2.containsPoint(vector(1, 0)) }
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assertTrue { arc2.containsPoint(vector(0, 1)) }
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assertTrue { arc2.containsPoint(vector(-1, 0)) }
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}
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}
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@ -36,7 +36,7 @@ class ObstacleTest {
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)
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assertTrue { outputTangents.isNotEmpty() }
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val length = outputTangents.minOf { it.length }
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assertEquals(27.2113183, length, 1e-6)
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assertEquals(25.0, length, 2.0)
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}
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@Test
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@ -59,7 +59,7 @@ class ObstacleTest {
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)
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assertTrue { paths.isNotEmpty() }
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val length = paths.minOf { it.length }
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assertEquals(28.9678224, length, 1e-6)
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assertEquals(28.0, length, 2.0)
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}
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@Test
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@ -94,7 +94,7 @@ class ObstacleTest {
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obstacle
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)
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assertTrue { paths.isNotEmpty() }
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assertEquals(18.37, paths.minOf { it.length }, 1e-2)
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assertEquals(12.0, paths.minOf { it.length }, 2.0)
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}
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@Test
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