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package de.romjaki.pluggabledino.game
import org.jbox2d.callbacks.ContactImpulse
import org.jbox2d.callbacks.ContactListener
import org.jbox2d.collision.Manifold
import org.jbox2d.collision.shapes.PolygonShape
import org.jbox2d.common.Vec2
import org.jbox2d.dynamics.*
import org.jbox2d.dynamics.contacts.Contact
import org.newdawn.slick.Input
class GameWorld : ContactListener {
override fun endContact(contact: Contact?) {
}
override fun beginContact(contact: Contact?) {
contact!!
val bodies = listOf(contact.fixtureA.body, contact.fixtureB.body)
if (bodies.contains(dino) && cacti.any { bodies.contains(it) }) {
hurt = true
}
}
override fun preSolve(contact: Contact?, oldManifold: Manifold?) {
}
override fun postSolve(contact: Contact?, impulse: ContactImpulse?) {
}
var hurt = false
val world: World
val cacti = mutableListOf<Body>()
val cactiBodyDef: BodyDef
val groundBody: Body
val dino: Body
val groundBodyDef: BodyDef
val groundBox: PolygonShape
val dinoDef: BodyDef
val dinoBox: PolygonShape
val dinoFixtureDef: FixtureDef
init {
val gravity = Vec2(0f, 10f)
world = World(gravity)
//#region GROUND
groundBodyDef = BodyDef()
groundBodyDef.position.set(0f, 50f)
groundBody = world.createBody(groundBodyDef)
groundBox = PolygonShape()
groundBox.setAsBox(50f, 10f)
groundBody.createFixture(groundBox, 0f)
//#endregion
//#region DINO
dinoDef = BodyDef()
dinoDef.type = BodyType.DYNAMIC
dinoDef.position.set(4f, 39f)
dino = world.createBody(dinoDef)
dinoBox = PolygonShape()
dinoBox.setAsBox(1f, 1f)
dinoFixtureDef = FixtureDef()
dinoFixtureDef.shape = dinoBox
dinoFixtureDef.density = 0.9f
dinoFixtureDef.friction = 0.3f
dino.createFixture(dinoFixtureDef)
//#endregion
cactiBodyDef = BodyDef()
createCactus()
}
fun createCactus() {
val body = world.createBody(cactiBodyDef)
val shape = PolygonShape()
shape.setAsBox(1f, 1f)
body.createFixture(shape, 0f)
cacti.add(body)
}
fun update(delta: Float, input: Input) {
if (input.isKeyDown(Input.KEY_UP)) {
if (isDinoOnGround()) {
print("Jump")
dino.applyForceToCenter(Vec2(0f, -2000f))
}
}
world.step(delta, 4, 3)
world.setContactListener(this)
}
private fun isDinoOnGround(): Boolean =
dino.linearVelocity.y == 0.0f
}
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