/// Called at beginning or when resetting position.
Called at beginning or when resetting position.
Called at beginning or when resetting position .
fn start(&mut self, value: f64, vector: [f64; 2]) {
        self.set_value(value);
        self.set_old_vector(vector);
        self.set_started(true);
    }
fn start ( & mut self , value : f64 , vector : [ f64 ; 2 ] ) { self . set_value ( value ) ; self . set_old_vector ( vector ) ; self . set_started ( true ) ; }
Called at beginning or when resetting position.
Called at beginning or when resetting position .
&mut self
value
f64
vector
[f64; 2]