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/*
* Graphyx
* copyright (c) 2009 Jakob Odersky
* made available under the MIT License
*/
package graphyx.tests
import sims.geometry._
import sims.dynamics._
import sims.dynamics.joints._
object Friction extends Test{
val title = "Friction"
val world = new World
var r1: RevoluteJoint = _
var r2: RevoluteJoint = _
var r3: RevoluteJoint = _
def init = {
val ground = (new Rectangle(1000, 0.1, 1) {friction = 1}).asBody
ground.fixed = true
world += ground
val ball1 = (new Circle(0.2, 1) {pos = Vector2D(0, 1); friction = 0.05}).asBody
ball1.angularVelocity = -80
ball1.monitor = true
val ball2 = (new Circle(0.2, 1) {pos = Vector2D(1, 1); friction = 0.2}).asBody
ball2.angularVelocity = -80
ball2.monitor = true
val ball3 = (new Circle(0.2, 1) {pos = Vector2D(2, 1); friction = 1}).asBody
ball3.angularVelocity = -80
ball3.monitor = true
world += ball1
world += ball2
world += ball3
world.monitors += ("", (b: Body) => "I=" + b.I + "\tw=" + b.angularVelocity + "\tEcin=" + 0.5 * b.I * b.angularVelocity * b.angularVelocity)
r1 = RevoluteJoint(ground, ball1, ball1.pos)
r2 = RevoluteJoint(ground, ball2, ball2.pos)
r3 = RevoluteJoint(ground, ball3, ball3.pos)
world += r1
world += r2
world += r3
}
override def fireEvent = {
world -= r1
world -= r2
world -= r3
}
}
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