private bool step(s_coordinate step_velocity)
{
List <s_coordinate> cleared_positions = new List <s_coordinate>();
foreach (c_sea_cucumber sea_cucumber in sea_cucumbers)
{
if (sea_cucumber.velocity.equals(step_velocity))
{
s_coordinate new_position = get_position_coordinates(
sea_cucumber.position.add(sea_cucumber.velocity));
if (positions[new_position.row][new_position.column] == null)
{
cleared_positions.Add(sea_cucumber.position);
sea_cucumber.position = new_position;
positions[new_position.row][new_position.column] = sea_cucumber;
}
}
}
bool any_moved = (cleared_positions.Count > 0);
foreach (s_coordinate cleared_position in cleared_positions)
{
positions[cleared_position.row][cleared_position.column] = null;
}
return(any_moved);
}
public c_sea_floor(c_input_reader input_reader)
{
sea_cucumbers = new List <c_sea_cucumber>();
List <c_sea_cucumber[]> position_list = new List <c_sea_cucumber[]>();
s_coordinate position = new s_coordinate {
row = 0, column = 0
};
while (input_reader.has_more_lines())
{
List <c_sea_cucumber> position_row_list = new List <c_sea_cucumber>();
position.column = 0;
foreach (char input_char in input_reader.read_line())
{
c_sea_cucumber sea_cucumber = null;
switch (input_char)
{
case '>':
sea_cucumber = new c_sea_cucumber {
position = position, velocity = k_east
};
break;
case 'v':
sea_cucumber = new c_sea_cucumber {
position = position, velocity = k_south
};
break;
case '.':
break;
default:
throw new Exception("Invalid input");
}
if (sea_cucumber != null)
{
sea_cucumbers.Add(sea_cucumber);
}
position_row_list.Add(sea_cucumber);
position.column++;
}
position_list.Add(position_row_list.ToArray());
position.row++;
}
positions = position_list.ToArray();
}
public bool equals(s_coordinate other)
{
return(this.row == other.row && this.column == other.column);
}
public s_coordinate add(s_coordinate other)
{
return(new s_coordinate {
row = this.row + other.row, column = this.column + other.column
});
}
private s_coordinate get_position_coordinates(s_coordinate position)
{
return(new s_coordinate {
row = position.row % positions.Length, column = position.column % positions[0].Length
});
}