Ahmed Adamjee / Mbed 2 deprecated SnakeVSBlock

Snake vs Block Game to be run upon K64F.

Dependencies:   mbed

GameObjects/Snake/Snake.cpp@87:871d9fecb593, 2019-05-08 (annotated)

Committer:
AhmedPlaymaker
Date:
Wed May 08 16:39:24 2019 +0000
Revision:
87:871d9fecb593
Parent:
83:329da564799a 
I have changed some variable names so that they have more meaning, and also added some more comments

Who changed what in which revision?

UserRevisionLine numberNew contents of line
AhmedPlaymaker 7:48ba87cd79b5 1 #include "Snake.h"
AhmedPlaymaker 7:48ba87cd79b5 2
AhmedPlaymaker 7:48ba87cd79b5 3 Snake::Snake()
AhmedPlaymaker 7:48ba87cd79b5 4 {
AhmedPlaymaker 7:48ba87cd79b5 5
AhmedPlaymaker 7:48ba87cd79b5 6 }
AhmedPlaymaker 7:48ba87cd79b5 7
AhmedPlaymaker 7:48ba87cd79b5 8 Snake::~Snake()
AhmedPlaymaker 7:48ba87cd79b5 9 {
AhmedPlaymaker 7:48ba87cd79b5 10
AhmedPlaymaker 7:48ba87cd79b5 11 }
AhmedPlaymaker 7:48ba87cd79b5 12
AhmedPlaymaker 7:48ba87cd79b5 13 //The Snake Sprite.
AhmedPlaymaker 8:890b986b16a4 14 int snake_sprite[3][3] = {
AhmedPlaymaker 8:890b986b16a4 15 {0,1,0},
AhmedPlaymaker 8:890b986b16a4 16 {1,0,1},
AhmedPlaymaker 8:890b986b16a4 17 {0,1,0},
AhmedPlaymaker 9:d1d79d4ee673 18 };
AhmedPlaymaker 7:48ba87cd79b5 19
AhmedPlaymaker 83:329da564799a 20 void Snake::init(N5110 *lcd)
AhmedPlaymaker 83:329da564799a 21 {
AhmedPlaymaker 83:329da564799a 22 _lcd = lcd;
AhmedPlaymaker 83:329da564799a 23 _speed = 1;
AhmedPlaymaker 83:329da564799a 24 reset = 0; //Variable used to allow a starting location for the player.
AhmedPlaymaker 83:329da564799a 25 }
AhmedPlaymaker 83:329da564799a 26
AhmedPlaymaker 83:329da564799a 27 void Snake::_setLength(int length)
AhmedPlaymaker 7:48ba87cd79b5 28 {
AhmedPlaymaker 68:b9cfd27987ac 29 _length = length;
AhmedPlaymaker 71:4bd2b27693f3 30 if(length >= 10) {
AhmedPlaymaker 71:4bd2b27693f3 31 _length = 10; //to stop the snake length virtually at 10 when it goes past it.
AhmedPlaymaker 71:4bd2b27693f3 32 }
AhmedPlaymaker 7:48ba87cd79b5 33 }
AhmedPlaymaker 7:48ba87cd79b5 34
AhmedPlaymaker 83:329da564799a 35 void Snake::_setSpeed(int speed)
AhmedPlaymaker 83:329da564799a 36 {
AhmedPlaymaker 83:329da564799a 37 _speed = speed;
AhmedPlaymaker 83:329da564799a 38 }
AhmedPlaymaker 7:48ba87cd79b5 39
AhmedPlaymaker 83:329da564799a 40 void Snake::draw()
AhmedPlaymaker 33:249cf423fb18 41 {
AhmedPlaymaker 81:4c1641e10dcd 42 if(reset == 0) {
AhmedPlaymaker 70:7caab8069b9b 43
AhmedPlaymaker 68:b9cfd27987ac 44 Vector2D p = {WIDTH/2, HEIGHT - 3}; //Spawns player sprite near the middle of the screen.
AhmedPlaymaker 68:b9cfd27987ac 45 Snake::set_pos(p);
AhmedPlaymaker 63:205f0ca48473 46
AhmedPlaymaker 81:4c1641e10dcd 47 reset = reset+1;
AhmedPlaymaker 22:ee698f66146f 48 }
AhmedPlaymaker 63:205f0ca48473 49 //printf("SPRITE %d %d \n", _x[0], _y[0]);
AhmedPlaymaker 63:205f0ca48473 50
AhmedPlaymaker 70:7caab8069b9b 51 for(int i=0; i<=_length-1; i++) {
AhmedPlaymaker 83:329da564799a 52 _lcd->drawSprite(_x[i],_y[i],3,3,(int *)snake_sprite); //Function used to draw the sprite.
AhmedPlaymaker 8:890b986b16a4 53 }
AhmedPlaymaker 7:48ba87cd79b5 54 }
AhmedPlaymaker 19:05cc9f801468 55
AhmedPlaymaker 24:1c118b071430 56
AhmedPlaymaker 68:b9cfd27987ac 57 void Snake::set_pos(Vector2D p)
AhmedPlaymaker 68:b9cfd27987ac 58 {
AhmedPlaymaker 87:871d9fecb593 59 _x[0] = p.x; //Spawns first of the snake sprite near the middle of the screen.
AhmedPlaymaker 87:871d9fecb593 60 _y[0] = p.y; //Spawns first of thesnake sprite near the bottom of the screen.
AhmedPlaymaker 68:b9cfd27987ac 61
AhmedPlaymaker 87:871d9fecb593 62 for(int i=1; i<=9; i++) {
AhmedPlaymaker 87:871d9fecb593 63 _x[i] = _x[i-1]; //Makes them all get spawned at the same x position initially. (copies the previous snake bead)
AhmedPlaymaker 87:871d9fecb593 64 _y[i] = _y[i-1] - 3; //Makes them all get spawned 3 sprites appart in the y axis initially. (copies the previous snake bead)
AhmedPlaymaker 68:b9cfd27987ac 65 }
AhmedPlaymaker 68:b9cfd27987ac 66 }
AhmedPlaymaker 68:b9cfd27987ac 67
AhmedPlaymaker 70:7caab8069b9b 68 Vector2D Snake::get_pos(int snakeIndex)
AhmedPlaymaker 7:48ba87cd79b5 69 {
AhmedPlaymaker 70:7caab8069b9b 70 Vector2D snakepos; //Stores the snake position.
AhmedPlaymaker 71:4bd2b27693f3 71
AhmedPlaymaker 87:871d9fecb593 72 for(int i = snakeIndex; i<=9; i++) {
AhmedPlaymaker 87:871d9fecb593 73 if(_length == (i+1)) {
AhmedPlaymaker 87:871d9fecb593 74 snakepos.x = _x[i - snakeIndex]; //Gets the index from SnakevsBlock.cpp which is basically 0 for the top beed, and 9 for the 10th beed
AhmedPlaymaker 87:871d9fecb593 75 snakepos.y = _y[i - snakeIndex]; //and saves it in x[?] and y[?] which is 0 for the bottom beed and higher indexes for higher beeds.
AhmedPlaymaker 24:1c118b071430 76 return snakepos;
AhmedPlaymaker 24:1c118b071430 77 }
AhmedPlaymaker 9:d1d79d4ee673 78 }
AhmedPlaymaker 41:4edac50f010d 79 if(_length >= 10) {
AhmedPlaymaker 87:871d9fecb593 80 snakepos.x = _x[9 - snakeIndex]; //we know that at length = 10+ the snake doesn't look any longer, so subtracting the index from 9 will imply
AhmedPlaymaker 87:871d9fecb593 81 snakepos.y = _y[9 - snakeIndex]; //the top beed is _x[9], _y[9] and the last beed (index 9) is _x[0], _y[0]
AhmedPlaymaker 63:205f0ca48473 82 return snakepos;
AhmedPlaymaker 37:ee47699915b8 83 }
AhmedPlaymaker 87:871d9fecb593 84 snakepos.x = -100; //to make sure these coordinates do not interfere with any collisions as this is a default value if conditions do not satisfy,
AhmedPlaymaker 87:871d9fecb593 85 snakepos.y = -100; //(NULL is in range of collisions in this game and is therefore not used.
AhmedPlaymaker 24:1c118b071430 86 return snakepos;
AhmedPlaymaker 7:48ba87cd79b5 87 //printf("snakepos from player = %f %f \n", snakepos.x, snakepos.y);
AhmedPlaymaker 13:9785f2404045 88 }
AhmedPlaymaker 13:9785f2404045 89
AhmedPlaymaker 87:871d9fecb593 90 void Snake::update(Direction d, int* immobile_bead_n)
AhmedPlaymaker 13:9785f2404045 91 {
AhmedPlaymaker 87:871d9fecb593 92 _d = d; //Saves the direction of movement in a private struct _d from the SnakevsBlock.cpp.
AhmedPlaymaker 87:871d9fecb593 93
AhmedPlaymaker 87:871d9fecb593 94 Snake::chainSnakeTogether(immobile_bead_n); //chains the snake beads together in hysteresis.
AhmedPlaymaker 71:4bd2b27693f3 95
AhmedPlaymaker 87:871d9fecb593 96 Snake::moveSnake(immobile_bead_n); //makes the top bead in the snake move according to the user input direction.
AhmedPlaymaker 63:205f0ca48473 97
AhmedPlaymaker 87:871d9fecb593 98 Snake::_setSnakeLimits(); //makes the snake movement limited to the nokia screen and ensure spawn position is where we expected.
AhmedPlaymaker 71:4bd2b27693f3 99 }
AhmedPlaymaker 71:4bd2b27693f3 100
AhmedPlaymaker 87:871d9fecb593 101 void Snake::chainSnakeTogether(int* immobile_bead_n)
AhmedPlaymaker 71:4bd2b27693f3 102 {
AhmedPlaymaker 25:e827f1a8fadc 103 //this makes all of the snake beeds chained together by making the lower ones drag towards where the top one was in the previous loop
AhmedPlaymaker 87:871d9fecb593 104 //the immobile_bead_n[i] makes sure that the snake beed doesn't move if that beed is deactivated by colliding with a barrier. immobile_bead_n[i] also signifies the specific beed number by i.
AhmedPlaymaker 79:35cb65c52d25 105 for(int i=1; i<=9; i++) {
AhmedPlaymaker 71:4bd2b27693f3 106 if((_length > i)&&(_x[i-1] != _x[i])) {
AhmedPlaymaker 87:871d9fecb593 107 if ((_x[i-1] > _x[i])&&(immobile_bead_n[i] == 1)&&(immobile_bead_n[i-1] == 1)) {
AhmedPlaymaker 71:4bd2b27693f3 108 _x[i-1]-=_speed;
AhmedPlaymaker 8:890b986b16a4 109 }
AhmedPlaymaker 87:871d9fecb593 110 if ((_x[i-1] < _x[i])&&(immobile_bead_n[i] == 1)&&(immobile_bead_n[i-1] == 1)) {
AhmedPlaymaker 71:4bd2b27693f3 111 _x[i-1]+=_speed;
AhmedPlaymaker 22:ee698f66146f 112 }
AhmedPlaymaker 21:e41126528cc6 113 }
AhmedPlaymaker 21:e41126528cc6 114 }
AhmedPlaymaker 71:4bd2b27693f3 115 }
AhmedPlaymaker 71:4bd2b27693f3 116
AhmedPlaymaker 87:871d9fecb593 117 void Snake::moveSnake(int* immobile_bead_n)
AhmedPlaymaker 71:4bd2b27693f3 118 {
AhmedPlaymaker 63:205f0ca48473 119 //this makes the controls of W/E directions only exclusive to the top beed in the snake
AhmedPlaymaker 79:35cb65c52d25 120 for(int i=0; i<=9; i++) {
AhmedPlaymaker 87:871d9fecb593 121 if((_length == i+1)&&(immobile_bead_n[i] == 1)) {
AhmedPlaymaker 63:205f0ca48473 122
AhmedPlaymaker 87:871d9fecb593 123 if (_d == E) {
AhmedPlaymaker 63:205f0ca48473 124 _x[i]+= _speed;
AhmedPlaymaker 22:ee698f66146f 125 }
AhmedPlaymaker 63:205f0ca48473 126
AhmedPlaymaker 87:871d9fecb593 127 if (_d == W) {
AhmedPlaymaker 63:205f0ca48473 128 _x[i]-= _speed;
AhmedPlaymaker 63:205f0ca48473 129 }
AhmedPlaymaker 63:205f0ca48473 130
AhmedPlaymaker 63:205f0ca48473 131 }
AhmedPlaymaker 7:48ba87cd79b5 132 }
AhmedPlaymaker 71:4bd2b27693f3 133 }
AhmedPlaymaker 7:48ba87cd79b5 134
AhmedPlaymaker 71:4bd2b27693f3 135 void Snake::_setSnakeLimits()
AhmedPlaymaker 71:4bd2b27693f3 136 {
AhmedPlaymaker 71:4bd2b27693f3 137 // the following makes sure that when the length is increased, the snake stays where it was when it ate food.
AhmedPlaymaker 7:48ba87cd79b5 138
AhmedPlaymaker 79:35cb65c52d25 139 for(int i=1; i<=9; i++) {
AhmedPlaymaker 63:205f0ca48473 140
AhmedPlaymaker 79:35cb65c52d25 141 if(_length < (i+1)) {
AhmedPlaymaker 79:35cb65c52d25 142 _x[i] = _x[i-1];
AhmedPlaymaker 63:205f0ca48473 143 }
AhmedPlaymaker 9:d1d79d4ee673 144 }
AhmedPlaymaker 63:205f0ca48473 145
AhmedPlaymaker 25:e827f1a8fadc 146 //Limits set so that the snake does not travel off the screen.
AhmedPlaymaker 79:35cb65c52d25 147 for(int i=0; i<=9; i++) {
AhmedPlaymaker 63:205f0ca48473 148
AhmedPlaymaker 63:205f0ca48473 149 if (_x[i] <= 0) {
AhmedPlaymaker 63:205f0ca48473 150 _x[i] = 0;
AhmedPlaymaker 63:205f0ca48473 151 }
AhmedPlaymaker 63:205f0ca48473 152
AhmedPlaymaker 63:205f0ca48473 153 if (_x[i] > 81) {
AhmedPlaymaker 63:205f0ca48473 154 _x[i] = 81;
AhmedPlaymaker 63:205f0ca48473 155 }
AhmedPlaymaker 8:890b986b16a4 156 }
AhmedPlaymaker 70:7caab8069b9b 157 }