c# create barcode 5: Specifying a Pong Game in Objective-C

Creating Quick Response Code in Objective-C 5: Specifying a Pong Game

CHAPTER 5: Specifying a Pong Game
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Figure 5 2. The revised game drawing
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You ve created your game table and placed it within the screen s boundaries. The area outside the playing surface is black, while you ve made the table green with white lines to simulate a regulation table. There is another white line that runs along the edge of all four sides of the table that you decided not to add. The table has been moved further in at the bottom of the screen to make room for the serve button and scoring. If it hadn t occurred to you yet, think about what would happen if you made the whole screen your playing surface. The serve button and scores would be covering your playing surface. Of course, you could dim them or hide them when in play, but that creates a more complex game scenario that you would need to manage. For your exercise, it s much easier just to give them an area outside your field of play. So you ve probably beaten the drawing to death and should move on to requirements. But you re not. You need to know about what happens in more complex systems. The Pong game has only one screen. You could have added more a setup screen perhaps or maybe a preferences screen. But you didn t add those in order to keep the game simple and focus on dealing with accessory interfacing. But, in the real world, most other apps will have multiple screens. Even the simplest games intended for the market will have more than one screen.
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CHAPTER 5: Specifying a Pong Game
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Figure 5 3. The actual game screen
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If you re anxious to get moving on the game, feel free to skip ahead. However, I want to cover a couple more examples to stress the importance of good preparation work. Let s take another game example and make it as simple as possible. You ll even make it simpler than your Pong game. How do you do that You make it a one-player game. Let s use the example of a slot machine. A slot machine has one player pressing a button. This causes three (or more) wheels to start spinning, and, when they stop, certain combinations pay out. Why didn t you use this for your accessory controller program if it s simpler than Pong Your accessory needs to control something and, if you chose to make it a slot machine, all there would be to control would be the spin button and that wouldn t do much for your learning. What s involved with a slot machine Take a look at Figure 5 4 depicting the initial concept for a slot machine game. As you can see, it s very simple. There is a single screen that contains controls, scoring, and visual feedback. The control set consists of two ways to place a bet and a button to initiate the spin. The spin button corresponds to the serve button on the Pong game. You give your player a limit that he can bet and allow him to wager from one unit (dollar) up to that maximum. By tapping the BET+1 button, he can wager in increments from one dollar to the maximum currently set as ten. You also can say that whatever his last bet was carries over to the next spin. So, if he wagers seven and loses, his next wager is again going to be seven.
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CHAPTER 5: Specifying a Pong Game
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Figure 5 4. Slot game initial concept
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Because there isn t any real money involved, most players will generally bet the largest amount most of the time. For this, you provide the BET MAX button. Finally, when the player is ready, he presses the SPIN button; the wheels turn, the lights flash, and the music plays. But wait Are those on the drawing No. Before you get back to your pad and paper to make changes to the design, let s look for anything else you should add. To get the mood of a casino you want flashing lights, sounds, the smell of cigarette smoke and sexy cocktail waitresses walking around. You can t get the last two, but you can certainly add the lights and sound. But what if a player doesn t want sounds You need a way for him to change the mode of the game to be silent. Anything else Sure, what if the player wants to start over For this, you want to add a reset button. Also, slot machines, depending on how they are set up, are notorious for long times between payouts at least all the ones I ve played. For this, let s give the player an option to increase the odds. You ll stop there with your settings as you get the point. You ve added three setting controls: a reset, a change odds option, and a sound setting. Where do you put these Certainly, there is room on the main page, but that would defeat the style of the game. You want your player focused on playing the game, not tweaking settings. What you want to do is add a setup page. Remember how I said even small games could expand their number of pages quickly
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