Class PhysicsSystem

src/main/java/trace/physics/PhysicsSystem.kt:24–444

import java.util.*
import java.util.function.BiConsumer
import java.util.function.Consumer

class PhysicsSystem {

    val physics: Dict.Prop<FLineToPhysics> = Dict.Prop<Any>("physics")
            .toCanon<Any>().set(Dict.domain, "fline")

    val onContactStart: Dict.Prop<IdempotencyMap<BiConsumer<FLine, List<field.linalg.Vec2>?>>> = Dict.Prop<Any>("onContactStart")
            .toCanon<Any>().autoConstructs { IdempotencyMap<BiConsumer<FLine, List<field.linalg.Vec2>?>>(BiConsumer::class.java) }.set(Dict.domain, "fline")

    val onContactEnd: Dict.Prop<IdempotencyMap<Consumer<FLine>>> = Dict.Prop<Any>("onContactEnd")
            .toCanon<Any>().autoConstructs { IdempotencyMap<Consumer<FLine>>(Consumer::class.java) }.set(Dict.domain, "fline")


    val world = World(Vec2(0f, 0f))

    val allPhysicsLines = mutableSetOf<FLineToPhysics>();

    var TICK = 0L;

    class Contact(val tick: Long, val A: FLine, val B: FLine) {
        var terminated = -1L

        override fun equals(other: Any?): Boolean {
            if (this === other) return true
            if (other !is Contact) return false

            if (A != other.A) return false
            if (B != other.B) return false

            return true
        }

        override fun hashCode(): Int {
            var result = A.hashCode()
            result = 31 * result + B.hashCode()
            return result
        }

        var points: List<field.linalg.Vec2>? = null
    }

    val contacts = mutableSetOf<Contact>();

    init {
        world.setContactListener(object : ContactListener {
            override fun beginContact(contact: org.jbox2d.dynamics.contacts.Contact) {
                val A = fixturesToFLines[contact.fixtureA]
                val B = fixturesToFLines[contact.fixtureB]
                if (A != null && B != null) {
                    val c = Contact(tick = TICK, A = A, B = B)
                    val wm = WorldManifold()
                    contact.getWorldManifold(wm)
                    c.points = wm.points.map { convert2(it) }

                    contacts.remove(c)
                    contacts.add(c)
                }