Diff: main.cpp

Revision:

0:1719e11ef162

Child:

1:06958b7bbf65

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Wed May 04 23:47:13 2016 +0000
@@ -0,0 +1,397 @@
+/*
+Progress update:
+Easter -- Added ticker for joystick update
+            joystick initial position checker
+
+week 22 -- main logic behind snake game added
+            to do : wraparound (optional in main menu)
+                    menu system - play game, settings(joy calibration, wraparound on//off) ; game over screen
+*/
+
+
+#include "mbed.h"
+#include "N5110.h"
+#include "SDFileSystem.h"
+#define JOYSTICK_TOLERANCE 0.05 //direction tolerance of joystick
+
+//          VCC,    SCE,  RST,    D/C,   MOSI,  SCLK,   LED
+N5110 lcd (PTE26 , PTA0 , PTC4 , PTD0 , PTD2 , PTD1 , PTC3);
+
+void init_display();
+void draw_screen();
+void calibrate_joystick();
+void joystick_pos();
+void game_timer_isr();
+void food_pos();
+void snake_move();
+float refresh_rate = 10; //refresh screen in Hz
+volatile int g_timer_flag = 0;
+bool gameOver; //if game has ended
+int pdirection;
+int gamemode;
+
+const int width = 84 ; // screen width
+const int height = 48 ; // screen height
+
+Ticker gameTimer;
+Ticker gameTimer1;
+Ticker joystickTimer; // ticker timer for joystick poisition update
+int fx,fy,Button,score; // global variables to hold data (control)
+AnalogIn xAxis(A0);
+AnalogIn yAxis(A1);
+AnalogIn pot(A2);
+
+
+
+enum DirectionName { //joystick directions
+    CENTRE,
+    UP,
+    LEFT,
+    DOWN,
+    RIGHT,
+    UNKNOWN
+};
+
+;
+// struct for joystick
+typedef struct joystick1 Joystick;
+struct joystick1 {
+    float x;    // current x value
+    float x0;   // 'centred' x value
+    float y;    // current y value
+    float y0;   // 'centred' y value
+    int button; // button state (assume pull-down used, so 1 = pressed, 0 = unpressed)
+    DirectionName direction;  // current direction
+};
+
+Joystick joystick;
+
+typedef struct snake1 Snake;
+struct snake1 {
+    int hx; // head x value
+    int hy; // head y value
+    int length; // snake length
+    int tailx[100],taily[100]; //tail coordinates array
+};
+
+Snake snake;
+
+
+
+void init_display()
+{
+    lcd.init();
+    lcd.normalMode();      // normal colour mode
+    lcd.setBrightness(0.5); // put LED backlight on 50%
+    lcd.clear(); // clear screen (init)
+}
+
+void adjust_brightness()
+{
+    int x = pot;
+    lcd.setBrightness(x);
+}
+
+
+void draw_screen()
+{
+    lcd.clear();
+    // for (int i = 0; i < width; i++) { // borders across
+    //     lcd.setPixel(i,47);
+    //     lcd.setPixel(i,0);
+    // }
+    // for (int j = 0; j < height; j++) { // borders vertical
+    //    lcd.setPixel(0,j);
+    //     lcd.setPixel(83,j);
+    // }
+    lcd.drawRect(0,0,83,47,0);    // borders square
+    //lcd.setPixel(snake.hx,snake.hy); //print snake head position
+
+    for (int q = 0; q < snake.length ; q++) { //print snake
+        lcd.setPixel (snake.tailx[q],snake.taily[q]);
+    }
+    lcd.setPixel(snake.hx,snake.hy); //print snake head position
+    lcd.setPixel (fx,fy); //print food position
+    lcd.refresh();  // update display
+
+}
+
+void game_timer_isr()
+{
+    g_timer_flag = 1;
+}
+
+void calibrate_joystick()
+{
+    //get initial joystick position as offset
+    joystick.x0 = xAxis;
+    joystick.y0 = yAxis;
+
+}
+
+void joystick_pos()
+{
+    joystick.x = xAxis - joystick.x0;
+    joystick.y = yAxis - joystick.y0;
+
+    if ( fabs(joystick.y) <= JOYSTICK_TOLERANCE && fabs(joystick.x) < JOYSTICK_TOLERANCE) {
+        joystick.direction = CENTRE;
+    } else if ( joystick.y > JOYSTICK_TOLERANCE && fabs(joystick.x) < JOYSTICK_TOLERANCE) {
+        joystick.direction = UP;
+    } else if ( joystick.y < JOYSTICK_TOLERANCE && fabs(joystick.x) < JOYSTICK_TOLERANCE) {
+        joystick.direction = DOWN;
+    } else if ( joystick.x > JOYSTICK_TOLERANCE && fabs(joystick.y) < JOYSTICK_TOLERANCE) {
+        joystick.direction = RIGHT;
+    } else if ( joystick.x < JOYSTICK_TOLERANCE && fabs(joystick.y) < JOYSTICK_TOLERANCE) {
+        joystick.direction = LEFT;
+    } else {
+        joystick.direction = UNKNOWN;
+    }
+
+}
+
+
+void snake_move()
+{
+
+    if (joystick.direction == CENTRE) {
+        if (pdirection == 0)  {
+            snake.hx-- ;
+        } else if (pdirection == 1) {
+            snake.hy++ ;
+        } else if (pdirection == 2) {
+            snake.hx++ ;
+        } else if (pdirection == 3) {
+            snake.hy-- ;
+        } else {
+        }
+    } else {
+        if (joystick.direction == LEFT)  {
+            snake.hx-- ;
+            pdirection = 0;
+        } else if (joystick.direction == UP) {
+            snake.hy++ ;
+            pdirection = 1;
+        } else if (joystick.direction == RIGHT) {
+            snake.hx++ ;
+            pdirection = 2;
+        } else if (joystick.direction == DOWN) {
+            snake.hy-- ;
+            pdirection = 3;
+        } else {
+        }
+
+    }
+}
+
+void game()
+{
+    //brightnessTimer.attach(adjust_brightness,0.1);
+    //gamemode = 0;
+    gameOver = false;
+    snake.hx = width / 2; // initial position of snake head
+    snake.hy = height / 2;
+    food_pos();
+    score = 0;
+    pdirection = 1;
+    snake.length = 4; //length including head and tail
+    for (int w = 0; w < snake.length ; w++) { //set initial snake position
+        snake.tailx[w] = (snake.hx - w) ;
+        snake.taily[w] = snake.hy;
+    }
+    //draw_screen();
+
+    joystickTimer.attach(&joystick_pos, 0.1);
+    gameTimer.attach(&snake_move, 0.2);
+    gameTimer1.attach(&draw_screen, 0.1);
+
+
+    if (gamemode == 0) {
+        while (!gameOver) {
+        
+
+                for (int d = snake.length ; d > 0 ; d--) { //move all snake body one position back
+                    snake.tailx[d] = snake.tailx[d - 1];
+                }
+                snake.hx = snake.tailx[0];
+                snake.hy = snake.taily[0];
+                for (int pp = 1; pp < snake.length + 1; pp++) { //snake dies when come in contact with tail
+                    if (snake.tailx[0] == snake.tailx[pp] && snake.taily[0] == snake.taily[pp]) {
+                        gameOver = true;
+                    }
+
+                }
+                if (snake.tailx[0] == fx && snake.taily[0] == fy) { // snake grows when in contact with food
+                    score++;
+                    food_pos();
+                    snake.length++;
+                }
+                //snake_move();
+            }
+        
+    }
+
+
+
+
+    /*int prevx = snake.tailx[0];
+    int prevy = snake.taily[0];
+    int prev2x, prev2y;
+    // snake.tailx[0] = snake.hx;
+    // snake.taily[0] = snake.hy;
+
+    for (int i = 1; i < snake.length ; i++) {
+
+        prev2x = snake.tailx[i];
+        prev2y = snake.taily[i];
+        snake.tailx[i] = prevx;
+        snake.taily[i] = prevy;
+        prevx = prev2x;
+        prevy = prev2y;
+        draw_screen();
+    */
+
+// for (int w = 1; w < snake.length; w++) {
+//   if (snake.tailx[w] == snake.hx && snake.taily[w] == snake.hy) {
+//     gameOver = 1;
+//}
+// }
+
+
+
+}
+
+/*} else {
+        while (!gameOver) {
+            int prevx = snake.tailx[0];
+            int prevy = snake.taily[0];
+            int prev2x, prev2y;
+            snake.tailx[0] = snake.hx;
+
+            snake.taily[0] = snake.hy;
+
+
+            for (int i = 1; i < snake.length ; i++) {
+
+                prev2x = snake.tailx[i];
+                prev2y = snake.taily[i];
+                snake.tailx[i] = prevx;
+                snake.taily[i] = prevy;
+                prevx = prev2x;
+                prevy = prev2y;
+                draw_screen();
+
+                if (snake.hx == fx && snake.hy == fy) {
+                    score++;
+                    food_pos();
+                    snake.length++;
+
+
+                }
+                for (int w = 1; w < snake.length; w++) {
+                    if (snake.tailx[w] == snake.hx && snake.taily[w] == snake.hy) {
+                        gameOver = 1;
+                    }
+                }
+            }
+            }
+
+           // if (snake.hx == 0) {
+             //   gameOver = 1;
+            //} else if (snake.hx == 83) {
+              //  gameOver = 1;
+            //} else if (snake.hy == 0) {
+              //  gameOver = 1;
+            //} else if (snake.hy == 47) {
+              //  gameOver = 1;
+            //}
+
+*/
+
+
+void food_pos()
+{
+    srand(time(NULL));
+    fx = rand() % 83 + 1; // random x from 0 to width - 1 for x coordinate
+    fy = rand() % 47 + 1; // random y from 0 to height - 1 for y coordinate
+
+}
+
+void main_menu()
+{
+    //brightnessTimer.attach(adjust_brightness,0.1);
+    joystickTimer.attach(joystick_pos,0.1);
+    int select = 0;
+    while (1) {
+        switch(select) {
+            case 0:
+                switch(joystick.direction) {
+                    case UP:
+                        select = 1;
+                        break;
+                    case DOWN:
+                        select = 1;
+                        break;
+                }
+                break;
+            case 1:
+                switch(joystick.direction) {
+                    case UP:
+                        select = 0;
+                        break;
+                    case DOWN:
+                        select = 0;
+                        break;
+                }
+                break;
+        }
+        wait(0.1);
+        if (select == 0) {
+            lcd.clear();
+            lcd.printString("Start Game",7,0);
+            lcd.printString("Settings",7,1);
+            lcd.drawCircle(3,3,2,1);
+            lcd.refresh();
+        } else if (select == 1) {
+            lcd.clear();
+            lcd.printString("Start Game", 7,0);
+            lcd.printString("Settings",7,1);
+            lcd.drawCircle(3,11,2,1);
+            lcd.refresh();
+        }
+    }
+}
+
+int main()
+{
+    init_display();
+    //brightnessTimer.attach(adjust_brightness,0.1);
+    joystickTimer.attach(joystick_pos,0.1);
+    calibrate_joystick();
+    gamemode = 0;
+    //lcd.printString("Hello, World!",0,0);
+    //main_menu();
+    game();
+    /*while(1) {
+
+        lcd.clear();
+        if (joystick.direction == UP) {
+            lcd.printString ("UP",1,0);
+        } else if (joystick.direction == CENTRE) {
+            lcd.printString ("CENTRE",1,0);
+       } else if (joystick.direction == DOWN) {
+            lcd.printString ("DOWN",1,0);
+        } else if (joystick.direction == LEFT) {
+            lcd.printString ("LEFT",1,0);
+        } else if (joystick.direction == RIGHT) {
+            lcd.printString ("RIGHT",1,0);
+        } else {
+            lcd.printString ("UNKNOWN",1,0);
+        }
+        lcd.refresh();
+        wait(1);
+    }
+    */
+
+
+}