Flash MX 2004 Games : Art to ActionScript

Flash MX 2004 Games
17 }
18 }
Listing 15.8
Each of the functions called from a keyboard press tests for a suitable exit in the required
direction. The variable ‘paths’ is the user-rotated view of the maze. If you are pointing east and
there is a path to the east then this will have been mapped to a north direction using the enterCell
function. The purpose of each of these functions is to move the player around the maze legally.
Each function updates the ‘row’ and ‘col’ variables and adjusts the direction variable ‘dir’ if a turn
is involved. Each function completes by setting the ‘mode’ variable and playing the appropriate
animation to exit a cell.
1 function moveForward(){
2 if (paths & NORTH){
3 //Only allowed if a NORTH movement is available
4 switch (dir){
5 case NORTH:
6 row--;
7 break;
8 case SOUTH:
9 row++;
10 break;
11 case EAST:
12 col++;
13 break;
14 case WEST:
15 col--;
16 break;
17 }
18 Tunnel.mode = Tunnel.EXITING;
19 Tunnel.anim.gotoAndPlay("Forward");
20 }
21 }
22
23 function turnLeft(){
24 if (paths & WEST){
25 //Only allowed if a WEST movement is available
26 switch (dir){
27 case NORTH:
28 dir = WEST;
29 col--;
30 break;
31 case SOUTH:
240