Joe Shotton / Mbed 2 deprecated ELEC2645_Project_ll16j23s

testing documentation

Dependencies:   mbed ll16j23s_test_docs

SnakeBody/SnakeBody.cpp@6:6c9453397f4a, 2020-05-23 (annotated)

Committer:
JoeShotton
Date:
Sat May 23 20:01:00 2020 +0000
Revision:
6:6c9453397f4a
Parent:
5:06fa7674622a
Child:
7:dd84e0fab346
Implemented screen transition function

Who changed what in which revision?

UserRevisionLine numberNew contents of line
JoeShotton 3:fcd6d70e9694 1 #include "SnakeBody.h"
JoeShotton 3:fcd6d70e9694 2
JoeShotton 3:fcd6d70e9694 3 SnakeBody::SnakeBody()
JoeShotton 3:fcd6d70e9694 4 {
JoeShotton 4:ea3fa51c4386 5 _x_head = 42;
JoeShotton 4:ea3fa51c4386 6 _y_head = 24;
JoeShotton 5:06fa7674622a 7 _length = 10;
JoeShotton 4:ea3fa51c4386 8 _angle = -1.0;
JoeShotton 4:ea3fa51c4386 9 _state = 0;
JoeShotton 4:ea3fa51c4386 10 _d = 0;
JoeShotton 3:fcd6d70e9694 11 }
JoeShotton 3:fcd6d70e9694 12
JoeShotton 3:fcd6d70e9694 13 SnakeBody::~SnakeBody()
JoeShotton 3:fcd6d70e9694 14 {
JoeShotton 4:ea3fa51c4386 15 //destructor
JoeShotton 4:ea3fa51c4386 16 }
JoeShotton 4:ea3fa51c4386 17
JoeShotton 6:6c9453397f4a 18 void SnakeBody::init() {
JoeShotton 6:6c9453397f4a 19 _body_x.clear();
JoeShotton 6:6c9453397f4a 20 _body_x.push_back(42);
JoeShotton 6:6c9453397f4a 21 _body_y.clear();
JoeShotton 6:6c9453397f4a 22 _body_y.push_back(24);
JoeShotton 3:fcd6d70e9694 23 }
JoeShotton 3:fcd6d70e9694 24
JoeShotton 4:ea3fa51c4386 25 int SnakeBody::update_direction(float _angle, int _x_head, int _y_head) {
JoeShotton 4:ea3fa51c4386 26
JoeShotton 4:ea3fa51c4386 27 if ((_x_head % 2) + (_y_head % 2) == 0) { // only allows changing movement when the snake is cell-aligned (ie x and y are even)
JoeShotton 4:ea3fa51c4386 28 // partition 360 into segments and check which segment the angle is in
JoeShotton 4:ea3fa51c4386 29 if (_angle < 0.0f) { //check for -1.0 angle
JoeShotton 4:ea3fa51c4386 30 _d = 0;
JoeShotton 4:ea3fa51c4386 31 } else if (_angle < 45.0f) { //North quadrant
JoeShotton 4:ea3fa51c4386 32 _d = 1;
JoeShotton 4:ea3fa51c4386 33 } else if (_angle < 135.0f) { //East quadrant
JoeShotton 4:ea3fa51c4386 34 _d = 2;
JoeShotton 4:ea3fa51c4386 35 } else if (_angle < 225.0f) { //South quadrant
JoeShotton 4:ea3fa51c4386 36 _d = 3;
JoeShotton 4:ea3fa51c4386 37 } else if (_angle < 315.0f) { //West quadrant
JoeShotton 4:ea3fa51c4386 38 _d = 4;
JoeShotton 4:ea3fa51c4386 39 } else { //NW half - quadrant
JoeShotton 4:ea3fa51c4386 40 _d = 1;
JoeShotton 4:ea3fa51c4386 41 }
JoeShotton 3:fcd6d70e9694 42 }
JoeShotton 4:ea3fa51c4386 43 //printf("D: %d\n", _d);
JoeShotton 4:ea3fa51c4386 44 return _d; //returns quadrant, represented by direction integer
JoeShotton 4:ea3fa51c4386 45 };
JoeShotton 4:ea3fa51c4386 46
JoeShotton 4:ea3fa51c4386 47 void SnakeBody::update_position() {
JoeShotton 4:ea3fa51c4386 48
JoeShotton 4:ea3fa51c4386 49 Direction _fsm[5] = {
JoeShotton 4:ea3fa51c4386 50 {0, 0, {0,1,2,3,4}}, // Centred
JoeShotton 4:ea3fa51c4386 51 {0, -1, {1,1,2,1,4}}, // North, will not go to centre or south
JoeShotton 4:ea3fa51c4386 52 {1, 0, {2,1,2,3,2}}, // East, will not go to centre or west
JoeShotton 4:ea3fa51c4386 53 {0, 1, {3,3,2,3,4}}, // South, will not go to centre or north
JoeShotton 4:ea3fa51c4386 54 {-1, 0, {4,1,4,3,4}} // West, will not go to centre or east
JoeShotton 4:ea3fa51c4386 55 };
JoeShotton 4:ea3fa51c4386 56
JoeShotton 4:ea3fa51c4386 57 _state = _fsm[_state].nextState[_d]; // adjusts direction fsm state based on direction
JoeShotton 4:ea3fa51c4386 58 //printf("State: %d\n", _state);
JoeShotton 3:fcd6d70e9694 59
JoeShotton 3:fcd6d70e9694 60 _x_head += _fsm[_state].delta_x; // increments x value based on fsm state value
JoeShotton 3:fcd6d70e9694 61 _y_head += _fsm[_state].delta_y; // increments y value based on fsm state value
JoeShotton 3:fcd6d70e9694 62
JoeShotton 4:ea3fa51c4386 63 _x_head = ((_x_head % 84) + 84) % 84; // wraps x back to within range 0-83
JoeShotton 4:ea3fa51c4386 64 _y_head = ((_y_head % 48) + 48) % 48; // wraps y back to within range 0-47
JoeShotton 4:ea3fa51c4386 65
JoeShotton 4:ea3fa51c4386 66 //printf("x_head: %d\n", _x_head);
JoeShotton 4:ea3fa51c4386 67 //printf("y_head: %d\n", _y_head);
JoeShotton 4:ea3fa51c4386 68 };
JoeShotton 4:ea3fa51c4386 69
JoeShotton 4:ea3fa51c4386 70 void SnakeBody::snake_movement(Gamepad &pad) {
JoeShotton 4:ea3fa51c4386 71
JoeShotton 4:ea3fa51c4386 72 float _angle = pad.get_angle(); //finds joystick angle
JoeShotton 4:ea3fa51c4386 73 //printf("Joystick angle: %f\n", _angle);
JoeShotton 4:ea3fa51c4386 74 _d = update_direction(_angle, _x_head, _y_head); //converts angle into a integer direction
JoeShotton 4:ea3fa51c4386 75 update_position(); //takes integer direction and feeds it into FSM to move snake in correct direction
JoeShotton 4:ea3fa51c4386 76 update_body();
JoeShotton 4:ea3fa51c4386 77 }
JoeShotton 4:ea3fa51c4386 78
JoeShotton 4:ea3fa51c4386 79 void SnakeBody::update_body() {
JoeShotton 4:ea3fa51c4386 80
JoeShotton 4:ea3fa51c4386 81 _body_x.insert(_body_x.begin(), _x_head); //sets first array element to head coordinates
JoeShotton 4:ea3fa51c4386 82 _body_y.insert(_body_y.begin(), _y_head);
JoeShotton 4:ea3fa51c4386 83
JoeShotton 4:ea3fa51c4386 84 _body_x.erase(_body_x.begin() + _length, _body_x.end());
JoeShotton 4:ea3fa51c4386 85 _body_y.erase(_body_y.begin() + _length, _body_y.end());
JoeShotton 4:ea3fa51c4386 86 }
JoeShotton 4:ea3fa51c4386 87
JoeShotton 4:ea3fa51c4386 88 void SnakeBody::draw_body(N5110 &lcd){
JoeShotton 4:ea3fa51c4386 89
JoeShotton 4:ea3fa51c4386 90 for(int i = 0; i < _length; i++) {
JoeShotton 4:ea3fa51c4386 91 lcd.drawRect(_body_x[i],_body_y[i],2,2,FILL_BLACK);
JoeShotton 4:ea3fa51c4386 92 }
JoeShotton 4:ea3fa51c4386 93 }
JoeShotton 4:ea3fa51c4386 94
JoeShotton 4:ea3fa51c4386 95 void SnakeBody::snake_snake_collision(Gamepad &pad, bool &death){
JoeShotton 4:ea3fa51c4386 96 for(int i = 1; i < _length; i++) {
JoeShotton 4:ea3fa51c4386 97 if (_x_head == _body_x[i] && _y_head == _body_y[i]) { //checks if head coord is the same as any of the body coords
JoeShotton 4:ea3fa51c4386 98 pad.led(1,0.9);
JoeShotton 4:ea3fa51c4386 99 //printf("DEAD \n");
JoeShotton 4:ea3fa51c4386 100 _state = 0;
JoeShotton 4:ea3fa51c4386 101 death = true;
JoeShotton 4:ea3fa51c4386 102 //return true;
JoeShotton 4:ea3fa51c4386 103 } else {
JoeShotton 4:ea3fa51c4386 104 //pad.led(1,0.0);
JoeShotton 4:ea3fa51c4386 105 //printf("ALIVE \n");
JoeShotton 4:ea3fa51c4386 106 //return false;
JoeShotton 4:ea3fa51c4386 107 }
JoeShotton 4:ea3fa51c4386 108 }
JoeShotton 4:ea3fa51c4386 109 }