examples/charge.aup


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# Hold Space to charge a jump; gravity and the floor are authored here.
state holding = 0
state charge = 0
state y = 240
state velocity = 0
input jump = key Space
view actor_y = y
view meter_width = charge * 200
view amount = charge

on jump.down {
  if y >= 240 {
    holding = 1
    charge = 0
  }
}

on jump.up {
  if holding {
    velocity = -(160 + charge * 300)
    holding = 0
    charge = 0
  }
}

on frame {
  if holding {
    charge = clamp(charge + dt, 0, 1)
  }
  velocity = velocity + 600 * dt
  y = y + velocity * dt
  if y >= 240 {
    y = 240
    velocity = 0
  }
}