ELEC2645 (2018/19) / Mbed 2 deprecated el16dlc

Final Submission. I have read and agreed with Statement of Academic Integrity.

Dependencies:   mbed Gamepad N5110 Joystick

Game_engine/Game_engine.cpp@10:aedca0082855, 2019-05-09 (annotated)

Committer:
el16dlc
Date:
Thu May 09 13:52:41 2019 +0000
Revision:
10:aedca0082855
Parent:
9:a7ea33e6bd82 
Final

Who changed what in which revision?

UserRevisionLine numberNew contents of line
el16dlc 1:b9f3b7d869d8 1 #include "Game_engine.h"
el16dlc 2:0bd6711eae26 2 #include "Snake.h"
el16dlc 1:b9f3b7d869d8 3
el16dlc 10:aedca0082855 4 // constructor and destructor empty
el16dlc 1:b9f3b7d869d8 5 GameEngine::GameEngine() {
el16dlc 1:b9f3b7d869d8 6 }
el16dlc 10:aedca0082855 7 GameEngine::~GameEngine() {
el16dlc 10:aedca0082855 8 }
el16dlc 1:b9f3b7d869d8 9
el16dlc 10:aedca0082855 10 // Instance
el16dlc 2:0bd6711eae26 11 Snake snake;
el16dlc 1:b9f3b7d869d8 12
el16dlc 8:264398d3c610 13 void GameEngine::direction_reset() {
el16dlc 10:aedca0082855 14 _direction = 0; // resets direction so menu can be selected using buttons
el16dlc 8:264398d3c610 15 }
el16dlc 10:aedca0082855 16
el16dlc 2:0bd6711eae26 17 void GameEngine::init() {
el16dlc 10:aedca0082855 18 snake.init(); // initialize snake
el16dlc 5:23a85b16ee54 19 _game_cont = true;
el16dlc 10:aedca0082855 20 snake.set_food_posX((rand()%(19) + 1) * 4); // randomize horizontal food position
el16dlc 10:aedca0082855 21 snake.set_food_posY((rand()%(11) + 1) * 4 - 2); // randomize vertical food position
el16dlc 4:0fc3441556e1 22 _body_seg = 1;
el16dlc 8:264398d3c610 23 _direction = 0;
el16dlc 9:a7ea33e6bd82 24 _score = 0;
el16dlc 2:0bd6711eae26 25 }
el16dlc 8:264398d3c610 26
el16dlc 1:b9f3b7d869d8 27 void GameEngine::draw(N5110 &lcd) {
el16dlc 1:b9f3b7d869d8 28 lcd.drawRect(0,0,WIDTH,HEIGHT,FILL_TRANSPARENT); // Draws screen limits
el16dlc 10:aedca0082855 29 snake.draw_head(lcd); // call head drawing
el16dlc 10:aedca0082855 30 snake.draw_food(lcd); // call food drawing
el16dlc 2:0bd6711eae26 31 }
el16dlc 2:0bd6711eae26 32
el16dlc 2:0bd6711eae26 33 void GameEngine::get_dir(Gamepad &gamepad) {
el16dlc 10:aedca0082855 34 if ( gamepad.check_event(Gamepad::Y_PRESSED) && _direction != 1) { // if Y button pressed go up unless snake is going down
el16dlc 2:0bd6711eae26 35 _direction = 0;
el16dlc 2:0bd6711eae26 36 }
el16dlc 10:aedca0082855 37 else if ( gamepad.check_event(Gamepad::A_PRESSED) && _direction != 0) { // if A button pressed go down unless snake is going up
el16dlc 2:0bd6711eae26 38 _direction = 1;
el16dlc 2:0bd6711eae26 39 }
el16dlc 10:aedca0082855 40 else if ( gamepad.check_event(Gamepad::X_PRESSED) && _direction != 3) { // if X button pressed go left unless snake is going right
el16dlc 2:0bd6711eae26 41 _direction = 2;
el16dlc 2:0bd6711eae26 42 }
el16dlc 10:aedca0082855 43 else if ( gamepad.check_event(Gamepad::B_PRESSED) && _direction != 2) { // if B button pressed go right unless snake is going left
el16dlc 2:0bd6711eae26 44 _direction = 3;
el16dlc 2:0bd6711eae26 45 }
el16dlc 2:0bd6711eae26 46 }
el16dlc 2:0bd6711eae26 47
el16dlc 10:aedca0082855 48 void GameEngine::snake_move() { // checks direction of snake and increments snake in direction of travel
el16dlc 2:0bd6711eae26 49 if (_direction == 0) {
el16dlc 2:0bd6711eae26 50 snake.set_snake_posY (snake.get_snake_posY()- 4);
el16dlc 2:0bd6711eae26 51 } else if (_direction == 1) {
el16dlc 2:0bd6711eae26 52 snake.set_snake_posY (snake.get_snake_posY()+ 4);
el16dlc 2:0bd6711eae26 53 } else if (_direction == 2) {
el16dlc 2:0bd6711eae26 54 snake.set_snake_posX (snake.get_snake_posX()- 4);
el16dlc 2:0bd6711eae26 55 } else if (_direction == 3) {
el16dlc 2:0bd6711eae26 56 snake.set_snake_posX (snake.get_snake_posX()+ 4);
el16dlc 6:f02ea8ec42b3 57 }
el16dlc 3:660de4311976 58 }
el16dlc 3:660de4311976 59
el16dlc 3:660de4311976 60 void GameEngine::food_move() {
el16dlc 5:23a85b16ee54 61 srand(time(NULL));
el16dlc 8:264398d3c610 62 _food_reset = true;
el16dlc 10:aedca0082855 63 if(snake.get_snake_posX() == snake.get_food_posX() && snake.get_snake_posY() == snake.get_food_posY()) { // if snake head and food position in same place then reset food
el16dlc 3:660de4311976 64 snake.set_food_posX((rand()%(19) + 1) * 4);
el16dlc 3:660de4311976 65 snake.set_food_posY((rand()%(11) + 1) * 4 - 2);
el16dlc 10:aedca0082855 66 while(_food_reset == true) { // loop until food reset flag is not triggered
el16dlc 8:264398d3c610 67 _food_reset = false;
el16dlc 8:264398d3c610 68 for (int k = _body_seg; k > 0; k--) {
el16dlc 8:264398d3c610 69 if((_body_posX[k] == snake.get_food_posX() && _body_posY[k] == snake.get_food_posY()) || (snake.get_snake_posX() == snake.get_food_posX() && snake.get_snake_posY() == snake.get_food_posY())) {
el16dlc 10:aedca0082855 70 // if food position is the same as any of the snake body segments then reset food
el16dlc 8:264398d3c610 71 snake.set_food_posX((rand()%(19) + 1) * 4);
el16dlc 8:264398d3c610 72 snake.set_food_posY((rand()%(11) + 1) * 4 - 2);
el16dlc 8:264398d3c610 73 _food_reset = true;
el16dlc 8:264398d3c610 74 }
el16dlc 7:72119ea3b3b1 75 }
el16dlc 7:72119ea3b3b1 76 }
el16dlc 10:aedca0082855 77 _body_seg = _body_seg + 1; // increment number of body segments
el16dlc 10:aedca0082855 78 _score = _score + 1; // increment score
el16dlc 3:660de4311976 79 }
el16dlc 3:660de4311976 80 }
el16dlc 10:aedca0082855 81
el16dlc 4:0fc3441556e1 82 void GameEngine::snake_body(N5110 &lcd) {
el16dlc 4:0fc3441556e1 83 _body_posX[0] = snake.get_snake_posX();
el16dlc 4:0fc3441556e1 84 _body_posY[0] = snake.get_snake_posY();
el16dlc 4:0fc3441556e1 85 for (int j = _body_seg; j > 0; j--) {
el16dlc 10:aedca0082855 86 lcd.drawRect(_body_posX[j],_body_posY[j],4,4,FILL_BLACK); // draw each body part
el16dlc 4:0fc3441556e1 87 _body_posX[j] = _body_posX[j-1];
el16dlc 4:0fc3441556e1 88 _body_posY[j] = _body_posY[j-1];
el16dlc 4:0fc3441556e1 89 }
el16dlc 4:0fc3441556e1 90 }
el16dlc 5:23a85b16ee54 91
el16dlc 5:23a85b16ee54 92 void GameEngine::check_wall_collision() {
el16dlc 10:aedca0082855 93 if (snake.get_snake_posX() < 4 || snake.get_snake_posX() > 80 || snake.get_snake_posY() < 0 || snake.get_snake_posY() > 44) { // check if snake head has hit any of the walls
el16dlc 5:23a85b16ee54 94 _game_cont = false;
el16dlc 5:23a85b16ee54 95 }
el16dlc 5:23a85b16ee54 96 }
el16dlc 5:23a85b16ee54 97
el16dlc 5:23a85b16ee54 98 void GameEngine::check_snake_collision() {
el16dlc 5:23a85b16ee54 99 for (int i = _body_seg; i > 1; i--) {
el16dlc 10:aedca0082855 100 if (_body_posX[i] == snake.get_snake_posX() && _body_posY[i] == snake.get_snake_posY()) { // if snake head matches any part of snake body collision has occurred
el16dlc 10:aedca0082855 101 _game_cont = false;
el16dlc 5:23a85b16ee54 102 }
el16dlc 5:23a85b16ee54 103 }
el16dlc 5:23a85b16ee54 104 }
el16dlc 5:23a85b16ee54 105
el16dlc 8:264398d3c610 106 // accessors
el16dlc 10:aedca0082855 107 // this method gets the boolean value for checking whether the game should be running
el16dlc 5:23a85b16ee54 108 bool GameEngine::get_game_cont() {
el16dlc 5:23a85b16ee54 109 return _game_cont;
el16dlc 5:23a85b16ee54 110 }
el16dlc 10:aedca0082855 111
el16dlc 10:aedca0082855 112 // this method gets the direction set by the gamepad
el16dlc 8:264398d3c610 113 int GameEngine::get_direction() {
el16dlc 8:264398d3c610 114 return _direction;
el16dlc 8:264398d3c610 115 }
el16dlc 10:aedca0082855 116
el16dlc 10:aedca0082855 117 // this method gets the score
el16dlc 9:a7ea33e6bd82 118 int GameEngine::get_score() {
el16dlc 9:a7ea33e6bd82 119 return _score;
el16dlc 9:a7ea33e6bd82 120 }