Rosetta Code

Ray-casting algorithm: Difference between revisions

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Ray-casting algorithm (view source)

Revision as of 17:40, 7 October 2016

67 bytes removed ,  7 years ago
Kotlin: some improvements
(Kotlin: some improvements)
Line 1,748:
 
data class Edge(val s: Point, val e: Point) {
public operator fun invoke(p: Point) : Boolean = when {
s.y > e.y -> Edge(e, s).invoke(p)
p.y == s.y || p.y == e.y -> invoke(Point(p.x, p.y + epsilon))
Line 1,763:
}
 
data class Figure(val name: String, val edges: Array<Edge>) {
public operator fun contains(p: Point) = edges.count({ it.invoke(p) }) % 2 != 0
}
 
object Ray_casting {
public fun check(figures : Array<Figure>, points : List<Point>) {
println("points: " + points)
figures.forEach { f ->
println("figure: " + f.name)
f.edges.forEach { println(" " + it) }
println("result: " + (points.map { f.contains(it) in f }))
}
}
 
val epsilon = 0.00001
}</lang>
<lang scala>package ray_casting
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