Revision 2:f5abfdfe9e0b, committed 2013-05-03

Comitter:

mengelcke

Date:

Fri May 03 11:19:48 2013 +0000

Parent:

1:d55966246784

Commit message:

revised with more comments

Changed in this revision

diff -r d55966246784 -r f5abfdfe9e0b main.cpp
--- a/main.cpp	Fri May 03 10:52:36 2013 +0000
+++ b/main.cpp	Fri May 03 11:19:48 2013 +0000
@@ -1,14 +1,22 @@
+/* CarGame has the aim of trying to avoid obstacles on two lanes for as long as possbile.
+The speed increases as the game progresses and when you die you are able to see your score. */
+
 #include "mbed.h"
 #include "TextLCD.h"
 #include "TSISensor.h"
 
-TextLCD lcd(PTD1,PTD3,PTD2,PTD0,PTD5,PTA13); // rs, e, d4-d7
+// initialise LCD display
+TextLCD lcd(PTA1,PTA2,PTD4,PTA12,PTA4,PTA5); // rs, e, d4-d7
+
 // number of seconds to wait between each frame movement
 float frameTime = 1;
+
 // number of frames since speed increase
 int steps = 0;
+
 // number of frames in total
 int score = 0;
+
 // size of course
 int courseSize = 48;
 
@@ -18,12 +26,13 @@
     char course[courseSize][2];
     
     // blank course to start with
-    for(int i = 0; i < courseSize; i++) {
+    for(int i = 0; i < courseSize; i++)
+    {
         course[i][0] = ' ';
         course[i][1] = ' ';
     }
     
-    // obstacles
+    // obstacle course
     course[3][0] = '0';
     course[6][1] = '0';
     course[9][1] = '0';
@@ -47,20 +56,21 @@
     // set up touch sensor to control game
     TSISensor tsi;
     
-    int gameover = 0;
+    int gameover = 0; // define a 'gameover' flag
     
     // game loop
-    while(1) {    
+    while(1)
+    {    
         
         // print current course on lcd
-        for(int i = 15; i >= 0; i--) {
+        for(int i = 15; i >= 0; i--)
+        {
             lcd.locate(i,0);
             lcd.printf("%c",course[i][0]);
             lcd.locate(i,1);
             lcd.printf("%c",course[i][1]);
         }       
         
-        
         // create next frame of course
         // course loops round infinitely
         
@@ -70,11 +80,10 @@
         char toprow2 =  course[courseSize-1][1];
         
         // shift each row up 1
-        for(int i = courseSize-1; i >= 0; i--) {
-        
+        for(int i = courseSize-1; i >= 0; i--)
+        {
             course[i][0] = course[i-1][0];
             course[i][1] = course[i-1][1];
-        
         }
         
         // set bottom rows as the top rows that have been pushed off
@@ -84,7 +93,8 @@
         // game control
         // what to do if controller is on right
         
-        if (tsi.readPercentage() >= 0.5) { // if on one side of touchpad
+        if (tsi.readPercentage() >= 0.5)
+        { // if on one side of touchpad
             // go to column
             lcd.locate(15,1);
             // print game character
@@ -102,7 +112,8 @@
         }   
     
         // when controller is on left
-        else {
+        else
+        {
             // go to column
             lcd.locate(15,0);
             // print game character
@@ -119,26 +130,27 @@
             }
         }
     
-    // delay between each frame    
-    wait(frameTime);
-    // add to steps 
-    steps++;     
-    // add to score
-    score++;
-    // check whether enough steps completed to speed game up
-    if(steps > 5) {   
+        // delay between each frame    
+        wait(frameTime);
+        // add to steps 
+        steps++;     
+        // add to score
+        score++;
+    
+        // check whether enough steps completed to speed game up
+        if(steps > 5) {   
         frameTime -= 0.05;
         // reset number of steps
         steps = 0;
-    }
+        }
     
-    if(gameover == 1)
-    {
-    wait(10);
-    gameover = 0;
-    score = 0;
-    frameTime = 1;
+        // return all variables to initial values when game is lost
+        if(gameover == 1)
+        {
+        wait(10);
+        gameover = 0;
+        score = 0;
+        frameTime = 1;
+        }
     }
-  }
-    
 }