func (r *RotationSystem) Update(dt float32) {
// speed in radians per second
var speed float32 = math.Pi
// speed in degrees per second
var speedDegrees float32 = speed * 180 / math.Pi
for _, e := range r.entities {
e.SpaceComponent.Rotation += speedDegrees * dt
e.SpaceComponent.Rotation = math.Mod(e.SpaceComponent.Rotation, 360)
}
}
func (c *Clock) Tick() {
now := time.Now()
c.frames += 1
if !c.frame.IsZero() {
c.delta = float32(now.Sub(c.frame).Seconds())
}
c.elapsed += c.delta
c.frame = now
if c.elapsed >= 1 {
c.fps = float32(c.frames)
c.elapsed = math.Mod(c.elapsed, 1)
c.frames = 0
}
}
func (cam *cameraSystem) rotateTo(rotation float32) {
cam.angle = math.Mod(rotation, 360)
}