#Status: Completed and submitted for review

##To get started:

1. Clone this git repo to your computer

2. bundle install

3. to run the tests type: rspec spec

4. To run the program, go inside of lib and type:

ruby navigation_controller.rb

Enjoy!

##Expected INPUT AND OUTPUT

Test Input:

• 5 5
• 1 2 N
• LMLMLMLMM
• 3 3 E
• MMRMMRMRRM

Expected Output:

• 1 3 N
• 5 1 E

Image of my results:

##PROBLEM DESCRIPTION: MARS ROVERS

A squad of robotic rovers are to be landed by NASA on a plateau on Mars. This plateau, which is curiously rectangular, must be navigated by the rovers so that their on-board cameras can get a complete view of the surrounding terrain to send back to Earth.

A rover's position and location is represented by a combination of x and y co-ordinates and a letter representing one of the four cardinal compass points. The plateau is divided up into a grid to simplify navigation. An example position might be 0, 0, N, which means the rover is in the bottom left corner and facing North.

In order to control a rover, NASA sends a simple string of letters. The possible letters are 'L', 'R' and 'M'. 'L' and 'R' makes the rover spin 90 degrees left or right respectively, without moving from its current spot. 'M' means move forward one grid point, and maintain the same heading.

Assume that the square directly North from (x, y) is (x, y+1).

###INPUT: The first line of input is the upper-right coordinates of the plateau, the lower-left coordinates are assumed to be 0,0.

The rest of the input is information pertaining to the rovers that have been deployed. Each rover has two lines of input. The first line gives the rover's position, and the second line is a series of instructions telling the rover how to explore the plateau.

The position is made up of two integers and a letter separated by spaces, corresponding to the x and y co-ordinates and the rover's orientation.

Each rover will be finished sequentially, which means that the second rover won't start to move until the first one has finished moving.

###OUTPUT The output for each rover should be its final co-ordinates and heading.

###INPUT AND OUTPUT

Test Input: 5 5 1 2 N LMLMLMLMM 3 3 E MMRMMRMRRM

Expected Output: 1 3 N 5 1 E

##Assumptions: *A rover can not continue off the limits of the plateau

##My problem definition:

Lets assume that we deployed a robot at position X,Y which is the same as to say (0,0) North, here below are the detail scenarios that could happen:

1. Increment ++Y => Any move from point (X,Y) and the rover facing towards North
2. Decremement --Y => Any move from point (X,Y) and the rover facing towards South
3. Increment ++X => Any move from point (X,Y) and the rover facing towards East
4. Decrement --X => Any move from point (X,Y) and the rover facing towards West

• I am visualizing a XY graph where Y has the North and South coordinates and X has the East and West coordinates

###Important Assumption:

####*A rover can't continue off the limits of the plateau ####*If we pass a command string "MM" for a rover that is positioned at X,Y(0,0) facing North. Then the final destination of the rover will be X,Y(0,2)

Breakdown to code following the Object Oriented Way:

What are the states (classes) that I am going to use?

• Rover
• Plateau
• Navigation_controller

What are the behaviors (methods) for each state?

• Rover has the following behaviours:

  • Move
  • Single_move(move)
  • Rotate_left
  • Rotate_right
  • Rotate_forward
  • Initial_position
  • Ending_position
  • Within_limits?
  • Outside_grid(inst)

• Plateau has the following behavious:

  • Add_rover(rover)
  • Within_limits(pos_a, pos_b)