// Find the ball closest to the impulse and within a reasonable
// range, apply new velocity to the ball.
func (gn *Engine) applyImpulse(impulse *model.Ball) {
if gn.chatty {
log.Printf("Got impulse: %s", impulse.String())
}
closest, ball := gn.closestDsq(impulse.GetPos())
if ball == nil {
if gn.chatty {
log.Printf("No ball to punch.")
}
return
}
if gn.chatty {
log.Printf("DSQ to ball: %f.1\n", closest)
}
if closest <= gn.maxDistSqForImpulse {
if gn.chatty {
log.Printf("Punching ball.\n")
}
ball.SetVel(impulse.GetVel().X, impulse.GetVel().Y)
} else {
if gn.chatty {
log.Printf("Ball further than %f.1\n",
gn.maxDistSqForImpulse)
}
}
}
