Flash MX 2004 Games : Art to ActionScript

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16 Board games There are many two-player board games that convert readily to being played by a solo player and a computer. Chess programming in particular played a significant role in the history of computer programming. In this chapter I hope to introduce some of the ideas necessary to create a two-player strategy game that involves some programmed intelligence on the part of the computer. Two-player board games The simplest game is noughts and crosses. Even this game presents several challenges but with only a3× 3 playing grid it can be thought of as a game that could be analysed to a finish. Connect 4 is a variation on noughts and crosses limiting the player’s possible moves to filled columns only, and the game is made more difficult since a line of four is required. The classic two-player board game is chess, but programming a full chess implementation is beyond a one-chapter tutorial. The game of Go is such an easy game to learn and such a difficult one to master. The game we are going to concentrate on in this chapter is a simple game to learn and yet again quite tricky to play well, but it does have some very useful ground rules that makes it easier to teach a computer to play at least reasonably well. The game of Reversi The traditional game of Reversi is sold today as the game ‘Othello’. It has very simple rules, yet the game has all the hallmarks of a game of skill, namely that a good player will always beat a poor player; luck does not play any role. Each player uses the same counters that are coloured differently on each side, black and white being two obvious choices; one player always places their counters on the board with the black side facing up and the other player uses the opposite side. The board is a grid of 64 squares, eight in each direction. At the start of the game each player takes it in turn to place a counter on the board in any vacant one of the four central squares. After these first four pieces are placed, play continues with each player in turn placing a piece on the board to sandwich any number of their opponent’s pieces between their own coloured pieces in a line. A line can be horizontal, vertical or diagonal. Any opponent’s piece that is in a line between the current player’s new piece and any of the current player’s existing pieces is flipped over, thus becoming the same colour as the current player’s pieces. Figure 16.2 shows how placing a white piece at the lower right corner has the effect of creating two lines thus flipping two black pieces over to white. A line of opposing pieces can be of any length. The game is completed when either all the squares on the board are filled or a player cannot 244
Figure 16.1 The traditional game Reversi Figure 16.2 Placing a new piece Chapter 16: Board games go. So that’s the basic game. Where do we begin programming this game as a solo player against the computer game? Methods for board games First we need to reduce the problem into manageable chunks. How are we going to play the game? 1 Build and display the board. 2 Check for user input. 3 If the user places his piece legally, update the placed square and then update the board. 245
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Flash MX 2004 Games
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Flash MX 2004 Games Art to ActionSc
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Contents at a glance Introduction x
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Contents in summary Introduction xi
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Contents in summary Chapter 15: Maz
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Introduction: Learn to write Action
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1 Your first game Rather alarmingly
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Chapter 1: Your first game view of
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Using the Line tool Chapter 1: Your
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Chapter 1: Your first game Adding t
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Chapter 1: Your first game is true
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Chapter 1: Your first game would tr
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_x = startX; _y = startY; moveX = 0
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Section 1 Animation The first secti
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Flash MX 2004 Games Using the drawi
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Flash MX 2004 Games Figure 2.7 Stag
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Flash MX 2004 Games The Pencil tool
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Flash MX 2004 Games When you use th
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Flash MX 2004 Games Figure 2.25 Sca
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Flash MX 2004 Games To use a gradie
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Flash MX 2004 Games tweening was se
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Flash MX 2004 Games Figure 2.37 Usi
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3 Simple cut-out animation Flash is
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Flash MX 2004 Games Figure 3.4 Sele
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Flash MX 2004 Games Figure 3.7 Usin
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Flash MX 2004 Games Figure 3.10 The
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Flash MX 2004 Games pressing F5. Th
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Flash MX 2004 Games WalkLeft TurnLe
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4 Using CGI programs to create anim
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Flash MX 2004 Games that sometimes
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Flash MX 2004 Games As you get expe
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Flash MX 2004 Games colour layer us
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Flash MX 2004 Games A higher settin
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5 Background art All your games wil
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Flash MX 2004 Games Figure 5.3 A si
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Flash MX 2004 Games better to expor
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Flash MX 2004 Games if it is only d
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Figure 5.10 Using symbols to add te
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Flash MX 2004 Games independent whe
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Flash MX 2004 Games Using photograp
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Flash MX 2004 Games Website and you
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Flash MX 2004 Games 3 Choose ‘png
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Flash MX 2004 Games User input on m
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Flash MX 2004 Games Figure 6.8 Opti
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7 So what is a variable? After the
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Chapter 7: So what is a variable? a
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Chapter 7: So what is a variable? T
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Chapter 7: So what is a variable? B
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Chapter 7: So what is a variable? 3
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Chapter 7: So what is a variable? P
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Chapter 7: So what is a variable? 5
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Chapter 7: So what is a variable? n
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Chapter 7: So what is a variable? B
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8 In tip-top condition Should I go
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Chapter 8: In tip-top condition All
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Chapter 8: In tip-top condition Wit
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} } return false; Chapter 8: In tip
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Figure 8.5 Properties window for th
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Chapter 8: In tip-top condition to
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Chapter 8: In tip-top condition Tab
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Figure 8.12 The anchor point for th
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53 return 4; 54 } 55 } 56 } Listing
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Chapter 9: Using loops and the repe
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Chapter 9: Using loops Now instead
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do{ a++; if (a==10) continue; //Do
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Chapter 9: Using loops Two examples
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Figure 9.2 The Loops01 project at r
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Chapter 9: Using loops Creating sim
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Chapter 9: Using loops Creating phy
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1 //Initialise firing 2 for (i=0; i
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Chapter 9: Using loops heart of alm
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Chapter 10: Keep it modular a game
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Chapter 10: Keep it modular for(j=0
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Chapter 10: Keep it modular From a
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Chapter 10: Keep it modular To call
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4 pt2.init(20, 30); 5 pt2.sum(pt1);
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Chapter 10: Keep it modular a locat
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Chapter 10: Keep it modular 1 v1 =
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Chapter 10: Keep it modular Summary
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Chapter 11: Debugging would give th
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4 trace("n = " + n); 5 6 function s
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5 onClipEvent(enterFrame){ 6 count+
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10 name = "Box" + i; 11 eval(name).
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Chapter 11: Debugging 5 switch(i){
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Chapter 11: Debugging Using the Fla
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the Watch window, then you can see
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Figure 11.12 Debugging remotely Cha
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is presumed, www.niklever.net/flash
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Chapter 12: Using external files Th
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Chapter 12: Using external files Wh
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with a query string version: Chapte
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Figure 12.3 Developing the Weather
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function loaded(success){ if (succe
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Chapter 12: Using external files
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13 Small games to keep them loading
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Chapter 13: Small games to keep the
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Page 207 and 208: Figure 13.7 Developing the Pong gam
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Page 219 and 220: 14 Quizzes Quizzes are a very popul
Page 221 and 222: Chapter 14: Quizzes For now we will
Page 223 and 224: Figure 14.5 Creating a user Chapter
Page 225 and 226: Figure 14.8 Setting user permission
Page 227 and 228: Remember that a querystring takes t
Page 229 and 230: Chapter 14: Quizzes 36 "\’, diffi
Page 231 and 232: Chapter 14: Quizzes the query strin
Page 233 and 234: s.Close(); conn.Close(); Response.W
Page 235 and 236: Chapter 14: Quizzes 1 function setQ
Page 237 and 238: 5 status = "Question deleted"; 6 }
Page 239 and 240: Chapter 14: Quizzes Summary Most of
Page 241 and 242: Chapter 15: Mazes The strategy used
Page 243 and 244: Chapter 15: Mazes Notice that the f
Page 245 and 246: Chapter 15: Mazes 128, and exclude
Page 247 and 248: Figure 15.3 Creating the tunnel mod
Page 249 and 250: Chapter 15: Mazes Open ‘Examples\
Page 251 and 252: Chapter 15: Mazes sequence to show
Page 253 and 254: 64 Tunnel.gotoAndPlay("T_Right"); 6
Page 255 and 256: Chapter 15: Mazes 32 dir = EAST; 33
Page 257: Chapter 15: Mazes Summary In common
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Page 263 and 264: Chapter 16: Board games 6 }else{ 7
Page 265 and 266: Chapter 16: Board games Once the pl
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Page 269 and 270: 19 }else{ 20 flip[2] = false; 21 }
Page 271 and 272: 8 if (flip[6]) flipArrayLine(i, pie
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Page 275 and 276: A simple example Figure 17.1 Develo
Page 277 and 278: Chapter 17: Platformers game much e
Page 279 and 280: Chapter 17: Platformers If the cat
Page 281 and 282: Chapter 17: Platformers 11 break; 1
Page 283 and 284: Chapter 17: Platformers 96 gotoAndP
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Page 287 and 288: 56 }else if (moveY-4){ 57 moveY -=
Page 289 and 290: 13 name = "_root.Bin" + i; 14 dx =
Page 291 and 292: 16 mc.scale = 1.0; 17 } 18 19 House
Page 293 and 294: Chapter 17: Platformers 68 }else if
Page 295 and 296: Chapter 17: Platformers array, ‘d
Page 297 and 298: Figure 18.1 Developing the football
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Page 301 and 302: 50 Pitch.Red2.targetx = -96; 51 Pit
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Chapter 18: Sports simulations Upda
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26 break; 27 } 28 } 29 name = "_roo
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Chapter 18: Sports simulations 27 v
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Chapter 18: Sports simulations 1 fu
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Chapter 18: Sports simulations For
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Chapter 18: Sports simulations 22 _
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Section 4 Flash for mobiles The mob
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Flash MX 2004 Games Table 19.1 Synt
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Flash MX 2004 Games ‘Device sound
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Flash MX 2004 Games The game uses k
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Flash MX 2004 Games 316 Table 19.2
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20 Using Flash on a PocketPC Pocket
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Flash MX 2004 Games 1 2 3 Conker
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Flash MX 2004 Games 5 }else { 6 //
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Flash MX 2004 Games Figure 20.5 ‘
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Flash MX 2004 Games Reading the mai
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21 High score tables High score tab
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Chapter 21: High score tables Notic
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Figure 21.3 Creating an Access data
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Chapter 21: High score tables 12 Se
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Chapter 21: High score tables 1 so
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Chapter 21: High score tables ‘ge
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Chapter 21: High score tables Assum
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37 " has been set to " + score); 38
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Chapter 21: High score tables 19 fu
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22 Multi-player games using sockets
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Chapter 22: Multi-player games usin
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The possible tags in this example a
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Figure 23.1 Select Add/Remove Progr
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Figure 23.5 Configuring IIS Figure
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Figure 23.8 Running several simulta
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Chapter 23: Using Flash Communicati
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Figure 23.11 Live Log tab of the ad
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24 Embedding Flash In this chapter
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Chapter 24: Embedding Flash You can
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Figure 24.5 Choosing the source fil
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Chapter 24: Embedding Flash A dialo
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Chapter 24: Embedding Flash resourc
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Chapter 24: Embedding Flash can be
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Chapter 24: Embedding Flash 46 { 47
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Appendix A: Integrating Flash with
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Figure A.2 Importing the Flash inte
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Appendix A where ‘clipName’ is
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Appendix B: Tweening in code The ea
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Figure B.1 The graph of y = x 2 App
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Appendix B Joining together curves
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Appendix B want the result to start
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Figure B.7 Creating the tweening pr
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Appendix B Creating keyframes So fa
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and if the curve section is between
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} switch (channel){ case 0: return
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Bibliography Art The Illusion of Li
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Index 3D Studio Max animations, 54
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Buttons: concepts, 6, 113-15, 126-8
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fashions, 60 simplicity benefits, 3
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Floats: bugs, 96 concepts, 95-7 Flu
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Lightwave modeller, 46-54, 69, 226,
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Paint Bucket tool, 4, 5, 27-9 optio
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Set Score button, 340-2 Set-top box
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outline, 17 sections, 17, 21-8 usag
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Flash MX 2004 Games : Art to ActionScript

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