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Final Project: Space Invaders

Final Project: Space Invaders. Progress Report. Game Overview. Similar to “Space Invaders” Player control a ship at bottom of screen Collection of enemy ships advancing Destroy enemy ships before they hit player’s ship or bottom of screen. Implemented Classes. addSprites

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Final Project: Space Invaders

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  1. Final Project: Space Invaders Progress Report

  2. Game Overview • Similar to “Space Invaders” • Player control a ship at bottom of screen • Collection of enemy ships advancing • Destroy enemy ships before they hit player’s ship or bottom of screen.

  3. Implemented Classes • addSprites • Used to add sprites to the screen. • initState • Used to initialize and give sprites specific properties (Scale, Location, Rotation). • advanceFrame • Used to continuously call handleInput and handleCollisions • changeLevel • Resets gamestate and changes scoring/enemy speed

  4. Implemented Classes, cont. • handleInput • Interprets mouse movement and keyboard input. • Moving ship • Firing bullets • handleCollisions • Detects for collisions between enemy ships and walls • Player ship and enemy ships • Enemy ships and all walls • Enemy ships and bullets • Player ships and enemy bullets • initBullet • Creates a bullet to be fired at location of player ship

  5. Theme Development • General Path used to make player ship and enemy ships looks like space ships. • An image of space will make-up the background to give a more immersive feel.

  6. Level Progression • Not yet implemented. • As player progresses through levels • Enemy ships move faster • Enemy ships fire more bullets • Player receives more points per enemy ship • No end to levels—game gets harder and harder

  7. Scoring • For each enemy ship destroyed, the player will earn the number of points equivalent to the level he is on. • Level 1: 1 point per enemy ship destroyed • Level 4: 4 points per enemy ship destroyed • Level 31: 11 point per enemy ship destroyed

  8. Documentation • Writing documentation as methods are written to accurately and thoroughly annotate code.

  9. Demonstration Game Demo

  10. Problems Encountered • Making formation of enemy ships move as one. • When player destroys a ship, score continuously increases • Need to find a good solution for what to do with enemy ships and bullets when they are destroyed

  11. Anticipated/Expected? • Knew making the enemy ships move as one would be the first obstacle. • The score problem was unexpected. • The ship/bullet problem is something I knew I would run into.

  12. State of Problems • Made ships move as one (while still being independent sprites) by assigning each a tracker and simply looping through the formation to adjust velocities/locations simultaneously. • Other two are still outstanding problems. Believe they are related. • Bullet stays where it intersects the enemy ship, so the collision occurs over and over each time handleCollision is called

  13. Progress Evaluation • Are you on track according to your timeline? • A few days behind timeline. • What parts of your project are delayed? • The implementation of advanced game features. • Why are they delayed? • Dealing with destroyed ships/bullets is trickier than expected. • What parts of your project are on time? • Basic games features are almost complete. • What steps are you taking to get back onto your timeline? • Reassess timeline to have basic game, extra features, and debugging completed by end of week. • Has the scope of your project changed? If so, how and why? • The scope and goal of the project is exactly as stated in proposal. • Do you expect to complete your timeline by the due date? • Yes.

  14. Project Evaluation • Game Functionality - 200 points • Most basic game functions entirely correctly - 100 points • Movement and firing of bullets from player ship. • Side-to-side movement and advancement of enemy ships as one unit. • Enemy ships destroyed and score added when bullet intersects ship. • Correct implementation of levels. Faster enemy ships • Enemy ships firing back more. • Enemy ships worth more points.

  15. Project Evaluation, cont. • Some simple enhancements made - 50 points • Enemy ships randomly firing back at player ship. • Ship's color acts as gauge of life: green to red • So allow player to be hit more than once. • Several simple enhancements or 1-2 complex enhancements made - 50 points • Enemy ships, other than the formation, flying quickly downward for added difficulty. Will fly off bottom of the screen if not destroyed, player will not lose for this.

  16. Questions?

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