SnakeEngine.cpp

00001 #include "SnakeEngine.h"
00002 
00003 SnakeEngine::SnakeEngine()
00004 {
00005 
00006 }
00007 
00008 SnakeEngine::~SnakeEngine()
00009 {
00010 
00011 }
00012 void SnakeEngine::init(int apple_size, int snake_speed, int snake_score, int snake_snakeheight, int snake_snakewidth)  // Inital values of the SnakeEngine
00013 {
00014     //Apple Functions
00015     _apple_size = apple_size;
00016     _a.init(_apple_size);                        //Allows access to the apple
00017     
00018     //Snake Functions
00019     snake_speed = snake_speed; 
00020     _snake_snakeheight = snake_snakeheight;
00021     _snake_snakewidth = snake_snakewidth;
00022     _s.init(sx, sy, _snake_score, _snake_speed, _snake_snakewidth, _snake_snakeheight); //Alows access to the snake
00023 }
00024 
00025 void SnakeEngine::read_input(Gamepad &pad)
00026 {
00027     //Reads the input of the thumbstick for controlling the snake
00028     _d = pad.get_direction();
00029     _mag = pad.get_mag();
00030     
00031     // Only Show Yellow LEDS when in game
00032     // In this void as we have gamepad access
00033                  pad.led(2,1);  
00034                  pad.led(5,1);  
00035                  pad.led(3,0);  
00036                  pad.led(6,0);   
00037 }
00038 
00039 
00040 void SnakeEngine::crash(Gamepad &pad, N5110 &lcd)
00041 {
00042          //For moving the snake depending on the position of the thumbstick
00043          Vector2D snakepos = _s.get_pos(); 
00044             _s.update(_d,_mag);
00045          
00046          // Collision with wall Secition having this on will make it so if the snake colides with the wall then the snake dies
00047          // If you want to have it so the walls are boundaries and not deadly comment this section out and uncomment the section in Snake.CPP
00048              if (snakepos.x<=0){   // If it colides with the left wall
00049                  _dead=true;         //This function     
00050                 dead(lcd,pad);}      //Ends the Game
00051               if (snakepos.x>=84-_snake_snakewidth){  // The right wall
00052                  _dead=true;
00053                 dead(lcd,pad);}  
00054                if (snakepos.y<=8){  // Set to 8 Due to the score being included
00055                  _dead=true;
00056                 dead(lcd,pad);}                               
00057               if (snakepos.y>=48-_snake_snakeheight){  // The bottom wall
00058                  _dead=true;
00059                 dead(lcd,pad);}  
00060           // End of Wall of Death Section!      
00061 }
00062 
00063 void SnakeEngine::draw(N5110 &lcd)
00064 {
00065     // draw what should be displayed on the screen
00066     
00067     // Game Area this allows us space for a line of text to display score
00068     lcd.drawRect(0,8,WIDTH,HEIGHT-8,FILL_TRANSPARENT);      
00069    
00070     // Displays the score
00071     print_score(lcd);
00072     
00073     // Draws the game objects Apple and Snake
00074     _a.draw(lcd);  // Draws Apple
00075     _s.draw(lcd);  // Draws Snake
00076 }
00077 
00078 void SnakeEngine::eat(N5110 &lcd, Gamepad &pad)
00079 
00080 {
00081   Vector2D apple_pos = _a.get_pos();  // Gets the position of the apple
00082   Vector2D snake_pos = _s.get_pos();  // Gets the position of the snake 
00083   
00084   // Meant to get the position of the food and the position of the snake and adds to score and spawns a new apple but doesn't seem to work :(
00085   
00086    if (
00087         (apple_pos.y >= snake_pos.y) &&                     
00088         (apple_pos.y <= snake_pos.y + _snake_snakewidth) && 
00089         (apple_pos.x >= snake_pos.y) && 
00090         (apple_pos.x <= snake_pos.y + _snake_snakeheight))
00091         
00092         {
00093     _s.add_score();
00094     apple_pos.x = (rand() % (WIDTH));        // Spawns the food in a random place
00095     apple_pos.y = (rand() % (HEIGHT)); 
00096     
00097           pad.led(3,1);               // Flashes the LEDS green
00098           pad.led(6,1);
00099           wait(0.5);
00100           pad.led(3,0);
00101           pad.led(6,0);
00102   }
00103   
00104 }
00105 
00106 void SnakeEngine::print_score(N5110 &lcd)
00107 {
00108         //Everything to do with displaying the score
00109         int score = _s.get_score();
00110         char buffer[14];                                         // each character is 6 pixels wide, screen is 84 pixels (84/6 = 14) max characters is 14 
00111         int ScoreLength = sprintf(buffer,"Score:%2d", score);     // 
00112         if (ScoreLength <= 14)                                    // Will only display if the buffer is less than 14 (Shouldn't be an issue here)
00113             lcd.printString(buffer,WIDTH/2-25,0);                // Puts the score in the center of the display
00114 }
00115 
00116 
00117 void SnakeEngine::dead(N5110 &lcd, Gamepad &pad)
00118 
00119 {
00120 while(_dead == true){
00121     lcd.clear(); 
00122      
00123      // Shows the Score when you are dead
00124      int score = _s.get_score();
00125         char buffer[14];                                         // each character is 6 pixels wide, screen is 84 pixels (84/6 = 14) max characters is 14 
00126         int ScoreLength = sprintf(buffer,"Score:%2d", score);     // 
00127         if (ScoreLength <= 14)                                    // Will only display if the buffer is less than 14 (Shouldn't be an issue here)
00128             lcd.printString(buffer,WIDTH/2-25,0);                // Puts the score in the center of the display
00129  
00130     // Notifies that you are dead and how to play again
00131  
00132     lcd.printString(" You're Dead!  ",0,2);  
00133     lcd.printString("  Play Again?  ",0,3); 
00134     lcd.printString(" Press Restart ",0,4);
00135     
00136     //Turns the Red LEDS on
00137                  pad.led(2,0);  
00138                  pad.led(5,0);  
00139                  pad.led(1,1);  
00140                  pad.led(4,1);  
00141                  wait(0.4);
00142                  pad.led(1,0); // Makes the flash :) 
00143                  pad.led(4,0);
00144                  wait(0.4); 
00145     lcd.refresh();
00146     }
00147 }