README.md

Missle Command Game

for MacOS

Install homebrew first.

ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)" < /dev/null 2> /dev/null

Install cmake

brew install cmake

Install sdl2_image.

brew install sdl2_image

Dependencies for Running Locally

• cmake >= 3.7
  • All OSes: click here for installation instructions
• make >= 4.1 (Linux, Mac), 3.81 (Windows)
  • Linux: make is installed by default on most Linux distros
  • Mac: install Xcode command line tools to get make
  • Windows: Click here for installation instructions
• SDL2 >= 2.0
  • All installation instructions can be found here
  • Note that for Linux, an apt or apt-get installation is preferred to building from source.
• gcc/g++ >= 5.4
  • Linux: gcc / g++ is installed by default on most Linux distros
  • Mac: same deal as make - install Xcode command line tools
  • Windows: recommend using MinGW

Basic Build Instructions

1. Clone this repo.
2. Make sure you have libraries SDL2 and SDL2_Image installed.
3. Make a build directory in the top level directory: mkdir build && cd build
4. Compile: cmake .. && make
5. Run it: ./MissleCommand.

Code Write Up

README

Instructions, how to play the game.

Gameplay:

• The emeny is firing missles at your cities. You must fire missles back to destroy them.
• Click with the mouse to fire defensive missles at the incoming missles
• Missles will fire from the surface and explode at the point you clicked. If you can get the incoming missle into the explosion, it will destroy the incoming missle.
• 25 points for every missle you destroy
• In the long run, the game will have levels. Bonus points will be awarded at the end of every level, for each city still standing and each missle not used.

Goal:

• Protect the cities. When your 6 cities are gone, the game is over.

File Structure.

• Subdirectory 'src' contains all .cpp and .h files.
• game.cpp runs the game cycle. It's Run method:
• • takes User input, (controller.cpp)
• • updates game elements, (game.cpp Update method calls Update on game objects)
• • cleans up destroyed elements (game.cpp has two cleanup methods to wipe out destroyed objects)
• • then renders the resulting object to the game screen (render.cpp draws objects)

Compiling And Testing

• The submission must compile and run.

Loops, Functions, I/0

• Functions and controll structures are there.
• No External files read.
• User input is taken from the mouse pointer to aim missles.
• • src/control.cpp - line 7 'HandleInput' reads mouse clicks

Object Oriented Programming

• All class data members are explicitly specified as public, protected, or private.

• • see missle.h, all lines

• Classes use accessor functions

• Class constructors use Member initialization lists

• • game.cpp, in constructor at lines 8-10
• • renderer.cpp, in constructor at lines 8-11
• • controler.cpp, lines 13-14

• Details abstracted in classes

• • silo.cpp city.cpp missle.cpp

• Encapsalation

• • silo.cpp city.cpp missle.cpp

• One member function in an inherited class overrides a virtual base class member function.

• • see missle.h base class with virtual function 'Update' at line 25.
• • • offense_missle.h / .cpp at line 6 and
• • • defense_missle.h / .cpp at line 10, override 'Update' virtual function.

Memory Management

• Refernces are passed, specially vectors of shared_ptrs.
• • game.h Game::Run, line 55
• Uses shared_ptr for Vectors of silo.cpp, city.cpp, offense_missle.cpp, and defense_missle.cpp
• • game.h lines 41-45

Concurrency

Inital starter code from - CPPND: Capstone Snake Game Example

repo

This is a starter repo for the Capstone project in the Udacity C++ Nanodegree Program. The code for this repo was inspired by this excellent StackOverflow post and set of responses.