actorwithbody splitted in favour of new particle type

Former-commit-id: 121bd069d0a9eeef60f5ecb085a11a93c4b4a84d
Former-commit-id: 539b4b6916e808c01298190cf347e928f61fe62e

src/net/torvald/terrarum/gameactors/ParticleBase.kt

@@ -0,0 +1,68 @@
+package net.torvald.terrarum.gameactors
+
+import net.torvald.terrarum.Terrarum
+import net.torvald.terrarum.gameactors.ActorWithSprite.Companion.SI_TO_GAME_ACC
+import net.torvald.terrarum.mapdrawer.FeaturesDrawer.TILE_SIZE
+import net.torvald.terrarum.tileproperties.Tile
+import net.torvald.terrarum.tileproperties.TileCodex
+import org.dyn4j.geometry.Vector2
+import org.newdawn.slick.GameContainer
+import org.newdawn.slick.Graphics
+import org.newdawn.slick.Image
+
+/**
+ * Actors with static sprites and very simple physics
+ *
+ * Created by SKYHi14 on 2017-01-20.
+ */
+open class ParticleBase(renderOrder: ActorOrder, maxLifeTime: Int? = null) : ActorVisible(renderOrder), Projectile {
+
+    override var actorValue = ActorValue()
+    override @Volatile var flagDespawn = false
+
+    override fun run() {
+        TODO("not implemented")
+    }
+
+    var isNoSubjectToGrav = false
+    var dragCoefficient = 3.0
+
+    private val lifetimeMax = maxLifeTime ?: 5000
+    private var lifetimeCounter = 0
+
+    open val velocity = Vector2(0.0, 0.0)
+
+    open lateinit var image: Image
+
+    init {
+
+    }
+
+    override fun update(gc: GameContainer, delta: Int) {
+        lifetimeCounter += delta
+        if (velocity.isZero || lifetimeCounter >= lifetimeMax ||
+            // simple stuck check
+            TileCodex[Terrarum.ingame.world.getTileFromTerrain(
+                    hitbox.pointedX.div(TILE_SIZE).floorInt(),
+                    hitbox.pointedY.div(TILE_SIZE).floorInt()
+            ) ?: Tile.STONE].isSolid) {
+            flagDespawn = true
+        }
+
+        // gravity, winds, etc. (external forces)
+        if (!isNoSubjectToGrav) {
+            velocity += Terrarum.ingame.world.gravitation / dragCoefficient * SI_TO_GAME_ACC
+        }
+
+
+        // combine external forces
+        hitbox.translate(velocity)
+    }
+
+    override fun drawBody(g: Graphics) {
+        g.drawImage(image, hitbox.centeredX.toFloat(), hitbox.centeredY.toFloat())
+    }
+
+    override fun drawGlow(g: Graphics) {
+    }
+}