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package graphyx.tests
import sims.dynamics._
import sims.geometry._
import sims.prefabs._
object Cannon extends Test{
val title = "Cannon"
val world = new World
def init = {
val cannon = new Prefab{
val hull = new Body(
new Rectangle(0.1,0.5,1) {pos = Vector2D(0.1, 0.6); friction = 0.0},
new Rectangle(0.1,0.5,1) {pos = Vector2D(0.5, 0.6); friction = 0.0},
new Rectangle(0.1,0.1,1) {pos = Vector2D(0.3, 0.2); friction = 0.0}
)
hull.fixed = true
hull.rotation -= Math.Pi / 2
val ball = new Body(new Circle(0.1,100) {pos = Vector2D(0.3, 0.56)})
override val bodies = List(hull, ball)
override val joints = Nil
}
val n = 10
val r = 0.1
val initialPos = Vector2D(5,0)
val stack = for (i <- (0 to n).toList) yield {
for (j <- (0 to n-i).toList) yield
new Body(
new Circle(r,10){
pos = Vector2D(2 * j * r + i * r, 1.7 * i * r) + initialPos
}
) {fixed = (i == 0)}
}
world += cannon
world ++= List.flatten(stack)
}
enableEvent = true
override def fireEvent() = blastBomb
def blastBomb() = {
val bombPos = Vector2D(0, 0.56)
val bombRadius = 1
val bombImpulse = 200
val region = new Circle(bombRadius, 0) {pos = bombPos}
val detector = world.detector.asInstanceOf[sims.collision.GridDetector]
val collisions = for (s <- world.shapes; if detector.colliding(sims.collision.Pair(region, s))) yield detector.collision(sims.collision.Pair(region, s))
for (c <- collisions) {
if (c.shape1 != region)
for(p <- c.points) c.shape1.body.applyImpulse((p - bombPos).unit * bombImpulse, p)
if (c.shape2 != region)
for(p <- c.points) c.shape2.body.applyImpulse((p - bombPos).unit * bombImpulse, p)
}
}
}
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