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Dependencies:   mbed FATFileSystem

Ball/Ball.cpp@12:7f7fadb5c106, 2019-05-03 (annotated)

Committer:
ellisbhastroud
Date:
Fri May 03 09:39:24 2019 +0000
Revision:
12:7f7fadb5c106
Parent:
11:6d2027253aa9
Child:
14:08ac9aaa34c3
Added more detailed in line comments. Added Doxygen comments for classes. Reorganised some class methods. Removed unnecessary methods. Split large methods into multiple smaller.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ellisbhastroud 3:a8960004d261 1 #include "Ball.h"
ellisbhastroud 3:a8960004d261 2
ellisbhastroud 3:a8960004d261 3 //constructor
ellisbhastroud 3:a8960004d261 4
ellisbhastroud 3:a8960004d261 5 Ball::Ball()
ellisbhastroud 3:a8960004d261 6 {
ellisbhastroud 3:a8960004d261 7
ellisbhastroud 3:a8960004d261 8 }
ellisbhastroud 3:a8960004d261 9
ellisbhastroud 3:a8960004d261 10 //deconstructor
ellisbhastroud 3:a8960004d261 11
ellisbhastroud 3:a8960004d261 12 Ball::~Ball()
ellisbhastroud 3:a8960004d261 13 {
ellisbhastroud 3:a8960004d261 14
ellisbhastroud 3:a8960004d261 15 }
ellisbhastroud 3:a8960004d261 16
ellisbhastroud 3:a8960004d261 17 //public methods
ellisbhastroud 3:a8960004d261 18
ellisbhastroud 9:bc34f2243e43 19 void Ball::init(Coord start_pos) //ball starts new level stationary in x and y positions given
ellisbhastroud 3:a8960004d261 20 {
ellisbhastroud 12:7f7fadb5c106 21 _x_pos = start_pos.x; //moves ball position to coordinates given
ellisbhastroud 9:bc34f2243e43 22 _y_pos = start_pos.y;
ellisbhastroud 12:7f7fadb5c106 23 _x_vel = 0.0f; //makes ball stationary
ellisbhastroud 4:035448357749 24 _y_vel = 0.0f;
ellisbhastroud 12:7f7fadb5c106 25 _total_shot_count = _total_shot_count + _shot_count; //totals shot count from previous levels
ellisbhastroud 12:7f7fadb5c106 26 _shot_count = 0; //resets in level shot count for the next level
ellisbhastroud 3:a8960004d261 27 }
ellisbhastroud 3:a8960004d261 28
ellisbhastroud 12:7f7fadb5c106 29 void Ball::drawBall(N5110 &lcd) //draws ball into lcd buffer
ellisbhastroud 3:a8960004d261 30 {
ellisbhastroud 5:0b31909caf7f 31 lcd.drawRect(_x_pos,_y_pos,2,2,FILL_BLACK); //draws ball
ellisbhastroud 3:a8960004d261 32 }
ellisbhastroud 3:a8960004d261 33
ellisbhastroud 12:7f7fadb5c106 34 void Ball::printShotCount(N5110 &lcd) //this is tallied for each level to give user an end score
ellisbhastroud 3:a8960004d261 35 {
ellisbhastroud 5:0b31909caf7f 36 char buffer[14];
ellisbhastroud 5:0b31909caf7f 37 sprintf(buffer,"Shot %i",_shot_count);
ellisbhastroud 5:0b31909caf7f 38 lcd.printString(buffer,40,0);
ellisbhastroud 4:035448357749 39 }
ellisbhastroud 4:035448357749 40
ellisbhastroud 12:7f7fadb5c106 41 void Ball::drawPower(N5110 &lcd, float mag) //draws power bar in top left of screen to indicate how hard a shot is hit
ellisbhastroud 5:0b31909caf7f 42 {
ellisbhastroud 10:9f54a6366e94 43 lcd.drawRect(0,1,36,6,FILL_TRANSPARENT);
ellisbhastroud 10:9f54a6366e94 44 lcd.drawRect(0,1,36*mag,6,FILL_BLACK);
ellisbhastroud 3:a8960004d261 45 }
ellisbhastroud 3:a8960004d261 46
ellisbhastroud 3:a8960004d261 47
ellisbhastroud 12:7f7fadb5c106 48 void Ball::drawAim(N5110 &lcd, Vector2D joy_coord, float angle) //draws aim help for ball
ellisbhastroud 12:7f7fadb5c106 49 { //aim indicates path of ball if shot
ellisbhastroud 12:7f7fadb5c106 50 if(angle != -1.0f && abs(_x_vel) < TOL && abs(_y_vel) < TOL) { //if joystick off centre and ball stationary draw shot direction indicator
ellisbhastroud 12:7f7fadb5c106 51 lcd.drawLine(_x_pos,_y_pos,_x_pos-12*joy_coord.x,_y_pos+12*joy_coord.y,2);
ellisbhastroud 8:d410856c6d04 52 }
ellisbhastroud 8:d410856c6d04 53 }
ellisbhastroud 8:d410856c6d04 54
ellisbhastroud 12:7f7fadb5c106 55 void Ball::move_ball() //controls the ball position movement
ellisbhastroud 3:a8960004d261 56 {
ellisbhastroud 10:9f54a6366e94 57 _x_pos = _x_pos + _x_vel*10.0f/_frame_rate; //move ball position at rate proportional to velocity in each direction
ellisbhastroud 10:9f54a6366e94 58 _y_pos = _y_pos + _y_vel*10.0f/_frame_rate;
ellisbhastroud 12:7f7fadb5c106 59 _x_vel = _x_vel*(1.0f-(0.6f/_frame_rate)); //velocity decreases as ball moves
ellisbhastroud 12:7f7fadb5c106 60 _y_vel = _y_vel*(1.0f-(0.6f/_frame_rate)); //inversely proportional to frame rate to ensure ball movement is the same at all frame rates
ellisbhastroud 12:7f7fadb5c106 61 if(_x_vel != 0 && _y_vel != 0 && abs(_x_vel) < 0.2f && abs(_y_vel) < 0.2f) { //to make ball come to complete stop when velocity is small enough
ellisbhastroud 8:d410856c6d04 62 _x_vel = 0;
ellisbhastroud 8:d410856c6d04 63 _y_vel = 0;
ellisbhastroud 8:d410856c6d04 64 }
ellisbhastroud 3:a8960004d261 65 }
ellisbhastroud 3:a8960004d261 66
ellisbhastroud 12:7f7fadb5c106 67 void Ball::shoot_ball(Gamepad &pad, Vector2D _joy_coord) //checks if shoot coniditons met and A pressed then ball is shot using joystick input
ellisbhastroud 12:7f7fadb5c106 68 { //direction of shot is in opposite direction of joystick direction
ellisbhastroud 12:7f7fadb5c106 69 if(pad.check_event(Gamepad::A_PRESSED) == true && abs(_x_vel) < TOL && abs(_y_vel) < TOL){ //If ball stationary and A pressed then shoot
ellisbhastroud 12:7f7fadb5c106 70 _x_vel = 6.0f * -_joy_coord.x; //scale x velocity by joystick direction and magnitude
ellisbhastroud 12:7f7fadb5c106 71 _y_vel = 6.0f * _joy_coord.y; //scale y velocity by joystick direction and magnitude
ellisbhastroud 12:7f7fadb5c106 72 _shot_count ++; //increment shot count
ellisbhastroud 12:7f7fadb5c106 73 }
ellisbhastroud 4:035448357749 74 }
ellisbhastroud 4:035448357749 75
ellisbhastroud 12:7f7fadb5c106 76 void Ball::set_total_shot_count(int total_shot_count) //used to initialise value to 0
ellisbhastroud 12:7f7fadb5c106 77 {
ellisbhastroud 12:7f7fadb5c106 78 int _total_shot_count = total_shot_count;
ellisbhastroud 3:a8960004d261 79 }
ellisbhastroud 3:a8960004d261 80
ellisbhastroud 12:7f7fadb5c106 81 int Ball::get_total_shot_count() //used at end to add tally to highscore - the lowest shot count is the best score
ellisbhastroud 3:a8960004d261 82 {
ellisbhastroud 9:bc34f2243e43 83 int total_shot_count = _total_shot_count;
ellisbhastroud 9:bc34f2243e43 84 return total_shot_count;
ellisbhastroud 9:bc34f2243e43 85 }
ellisbhastroud 9:bc34f2243e43 86
ellisbhastroud 9:bc34f2243e43 87 bool Ball::check_hole(Coord hole) //returns true when ball is hit in hole and next level begins
ellisbhastroud 9:bc34f2243e43 88 {
ellisbhastroud 9:bc34f2243e43 89 if(_x_pos > hole.x - 1 && _x_pos < hole.x + 2 && _y_pos > hole.y - 1 && _y_pos < hole.y + 2) {
ellisbhastroud 9:bc34f2243e43 90 _x_vel = 0; //stop ball moving
ellisbhastroud 9:bc34f2243e43 91 _y_vel = 0;
ellisbhastroud 9:bc34f2243e43 92 _x_pos = hole.x;
ellisbhastroud 9:bc34f2243e43 93 _y_pos = hole.y;
ellisbhastroud 9:bc34f2243e43 94 return true; //causes next level process to begin
ellisbhastroud 9:bc34f2243e43 95 }
ellisbhastroud 9:bc34f2243e43 96 else {
ellisbhastroud 9:bc34f2243e43 97 return false;
ellisbhastroud 9:bc34f2243e43 98 }
ellisbhastroud 9:bc34f2243e43 99 }
ellisbhastroud 9:bc34f2243e43 100
ellisbhastroud 9:bc34f2243e43 101 void Ball::check_wall_bounce(WallMap map[], int size) //uses information from WallMap array for each level to check for bounces
ellisbhastroud 3:a8960004d261 102 {
ellisbhastroud 12:7f7fadb5c106 103 for(int i = 0; i < size; i ++) { //runs through each element in array of wall types to check if bounce condition is met by ball
ellisbhastroud 3:a8960004d261 104
ellisbhastroud 12:7f7fadb5c106 105 if(map[i].wall == LEFT) {
ellisbhastroud 12:7f7fadb5c106 106 left_bounce(map[i].start,map[i].end);
ellisbhastroud 8:d410856c6d04 107 }
ellisbhastroud 8:d410856c6d04 108 else if(map[i].wall == RIGHT) {
ellisbhastroud 8:d410856c6d04 109 right_bounce(map[i].start,map[i].end);
ellisbhastroud 8:d410856c6d04 110 }
ellisbhastroud 8:d410856c6d04 111 else if(map[i].wall == TOP) {
ellisbhastroud 8:d410856c6d04 112 top_bounce(map[i].start,map[i].end);
ellisbhastroud 8:d410856c6d04 113 }
ellisbhastroud 8:d410856c6d04 114 else if(map[i].wall == BOTTOM) {
ellisbhastroud 8:d410856c6d04 115 bottom_bounce(map[i].start,map[i].end);
ellisbhastroud 8:d410856c6d04 116 }
ellisbhastroud 10:9f54a6366e94 117 else if(map[i].wall == BOTTOMLEFT) {
ellisbhastroud 10:9f54a6366e94 118 bottom_left_bounce(map[i].start,map[i].end);
ellisbhastroud 10:9f54a6366e94 119 }
ellisbhastroud 10:9f54a6366e94 120 else if(map[i].wall == BOTTOMRIGHT) {
ellisbhastroud 10:9f54a6366e94 121 bottom_right_bounce(map[i].start,map[i].end);
ellisbhastroud 10:9f54a6366e94 122 }
ellisbhastroud 10:9f54a6366e94 123 else if(map[i].wall == TOPLEFT) {
ellisbhastroud 10:9f54a6366e94 124 top_left_bounce(map[i].start,map[i].end);
ellisbhastroud 10:9f54a6366e94 125 }
ellisbhastroud 10:9f54a6366e94 126 else if(map[i].wall == TOPRIGHT) {
ellisbhastroud 10:9f54a6366e94 127 top_right_bounce(map[i].start,map[i].end);
ellisbhastroud 10:9f54a6366e94 128 }
ellisbhastroud 8:d410856c6d04 129 }
ellisbhastroud 3:a8960004d261 130 }
ellisbhastroud 5:0b31909caf7f 131
ellisbhastroud 10:9f54a6366e94 132 void Ball::set_frame_rate(int frame_rate)
ellisbhastroud 10:9f54a6366e94 133 {
ellisbhastroud 10:9f54a6366e94 134 _frame_rate = frame_rate;
ellisbhastroud 10:9f54a6366e94 135 }
ellisbhastroud 12:7f7fadb5c106 136
ellisbhastroud 3:a8960004d261 137 //private methods
ellisbhastroud 3:a8960004d261 138
ellisbhastroud 12:7f7fadb5c106 139 void Ball::left_bounce(Coord start, Coord end) //check for left wall collision
ellisbhastroud 12:7f7fadb5c106 140 {
ellisbhastroud 12:7f7fadb5c106 141 if(_x_pos + _x_vel*10.0f/_frame_rate - 1 < start.x && _x_pos + _x_vel*10.0f/_frame_rate > start.x - 5 && _y_pos >= start.y && _y_pos + 1 <= end.y && _x_vel < 0){
ellisbhastroud 12:7f7fadb5c106 142 _x_pos = start.x + 1;
ellisbhastroud 12:7f7fadb5c106 143 _x_vel = -_x_vel;
ellisbhastroud 12:7f7fadb5c106 144 }
ellisbhastroud 12:7f7fadb5c106 145 }
ellisbhastroud 12:7f7fadb5c106 146
ellisbhastroud 12:7f7fadb5c106 147 void Ball::right_bounce(Coord start, Coord end) //check for right wall collision
ellisbhastroud 12:7f7fadb5c106 148 {
ellisbhastroud 12:7f7fadb5c106 149 if(_x_pos + _x_vel*10.0f/_frame_rate + 2 > start.x && _x_pos + _x_vel*10.0f/_frame_rate < start.x + 5 && _y_pos >= start.y && _y_pos + 1 <= end.y && _x_vel > 0){ //right wall x + 1
ellisbhastroud 12:7f7fadb5c106 150 _x_pos = start.x - 1;
ellisbhastroud 12:7f7fadb5c106 151 _x_vel = -_x_vel;
ellisbhastroud 12:7f7fadb5c106 152 }
ellisbhastroud 12:7f7fadb5c106 153 }
ellisbhastroud 12:7f7fadb5c106 154
ellisbhastroud 12:7f7fadb5c106 155 void Ball::top_bounce(Coord start, Coord end) //check for top wall collision
ellisbhastroud 12:7f7fadb5c106 156 {
ellisbhastroud 12:7f7fadb5c106 157 if(_y_pos + _y_vel*10.0f/_frame_rate - 1 < start.y && _y_pos + _y_vel*10.0f/_frame_rate > start.y - 5 && _x_pos >= start.x && _x_pos + 1 <= end.x && _y_vel < 0){ //top wall y -1
ellisbhastroud 12:7f7fadb5c106 158 _y_pos = start.y + 1;
ellisbhastroud 12:7f7fadb5c106 159 _y_vel = -_y_vel;
ellisbhastroud 12:7f7fadb5c106 160 }
ellisbhastroud 12:7f7fadb5c106 161 }
ellisbhastroud 12:7f7fadb5c106 162
ellisbhastroud 12:7f7fadb5c106 163 void Ball::bottom_bounce(Coord start, Coord end) //check for bottom wall collision
ellisbhastroud 12:7f7fadb5c106 164 {
ellisbhastroud 12:7f7fadb5c106 165 if(_y_pos + _y_vel*10.0f/_frame_rate + 2 > start.y && _y_pos + _y_vel*10.0f/_frame_rate < start.y + 5 && _x_pos >= start.x && _x_pos + 1 <= end.x && _y_vel > 0){ //bottom wall
ellisbhastroud 12:7f7fadb5c106 166 _y_pos = start.y - 1;
ellisbhastroud 12:7f7fadb5c106 167 _y_vel = -_y_vel;
ellisbhastroud 12:7f7fadb5c106 168 }
ellisbhastroud 12:7f7fadb5c106 169 }
ellisbhastroud 12:7f7fadb5c106 170
ellisbhastroud 12:7f7fadb5c106 171 void Ball::bottom_left_bounce(Coord start, Coord end) //check for bottom left wall collision
ellisbhastroud 12:7f7fadb5c106 172 {
ellisbhastroud 12:7f7fadb5c106 173 if((_y_pos + _y_vel*10.0f/_frame_rate + 1) > (_x_pos + _x_vel*10.0f/_frame_rate - 1) + (start.y-start.x) && (_x_pos + _x_vel*10.0f/_frame_rate - 1) >= start.x && (_x_pos + _x_vel*10.0f/_frame_rate - 1) <= end.x && (_y_pos + _y_vel*10.0f/_frame_rate + 1) >= start.y && (_y_pos + _y_vel*10.0f/_frame_rate + 1) <= end.y ) {
ellisbhastroud 12:7f7fadb5c106 174 swap(_x_vel, _y_vel); //reflects from wall with velocity directions swapped
ellisbhastroud 12:7f7fadb5c106 175 }
ellisbhastroud 12:7f7fadb5c106 176 }
ellisbhastroud 12:7f7fadb5c106 177
ellisbhastroud 12:7f7fadb5c106 178 void Ball::bottom_right_bounce(Coord start, Coord end) //check for bottom right wall collision
ellisbhastroud 12:7f7fadb5c106 179 {
ellisbhastroud 12:7f7fadb5c106 180 if((_x_pos + _x_vel*10.0f/_frame_rate + 1) > -(_y_pos + _y_vel*10.0f/_frame_rate + 1) + (start.x+start.y)
ellisbhastroud 12:7f7fadb5c106 181 && (_x_pos + _x_vel*10.0f/_frame_rate + 1) >= start.x && (_x_pos + _x_vel*10.0f/_frame_rate + 1) <= end.x
ellisbhastroud 12:7f7fadb5c106 182 && (_y_pos + _y_vel*10.0f/_frame_rate + 1) >= end.y && (_y_pos + _y_vel*10.0f/_frame_rate + 1) <= start.y) {
ellisbhastroud 12:7f7fadb5c106 183
ellisbhastroud 12:7f7fadb5c106 184 _x_vel = -_x_vel; //negative wall
ellisbhastroud 12:7f7fadb5c106 185 _y_vel = -_y_vel;
ellisbhastroud 12:7f7fadb5c106 186 swap(_x_vel, _y_vel); //reflects from wall with velocity directions swapped
ellisbhastroud 12:7f7fadb5c106 187 }
ellisbhastroud 12:7f7fadb5c106 188 }
ellisbhastroud 12:7f7fadb5c106 189
ellisbhastroud 12:7f7fadb5c106 190 void Ball::top_left_bounce(Coord start, Coord end) //check for top left wall collision
ellisbhastroud 12:7f7fadb5c106 191 {
ellisbhastroud 12:7f7fadb5c106 192 if((_x_pos + _x_vel*10.0f/_frame_rate - 1) < -(_y_pos + _y_vel*10.0f/_frame_rate + 1) + (start.x+start.y)
ellisbhastroud 12:7f7fadb5c106 193 && (_x_pos + _x_vel*10.0f/_frame_rate - 1) >= start.x && (_x_pos + _x_vel*10.0f/_frame_rate - 1) <= end.x
ellisbhastroud 12:7f7fadb5c106 194 && (_y_pos + _y_vel*10.0f/_frame_rate + 1) >= end.y && (_y_pos + _y_vel*10.0f/_frame_rate + 1) <= start.y) {
ellisbhastroud 12:7f7fadb5c106 195
ellisbhastroud 12:7f7fadb5c106 196 _x_vel = -_x_vel; //negative wall
ellisbhastroud 12:7f7fadb5c106 197 _y_vel = -_y_vel;
ellisbhastroud 12:7f7fadb5c106 198 swap(_x_vel, _y_vel); //reflects from wall with velocity directions swapped
ellisbhastroud 12:7f7fadb5c106 199 }
ellisbhastroud 12:7f7fadb5c106 200 }
ellisbhastroud 12:7f7fadb5c106 201
ellisbhastroud 12:7f7fadb5c106 202 void Ball::top_right_bounce(Coord start, Coord end) //check for top right wall collision
ellisbhastroud 12:7f7fadb5c106 203 {
ellisbhastroud 12:7f7fadb5c106 204 if((_y_pos + _y_vel*10.0f/_frame_rate - 1) < (_x_pos + _x_vel*10.0f/_frame_rate + 1) + (start.y-start.x)
ellisbhastroud 12:7f7fadb5c106 205 && (_x_pos + _x_vel*10.0f/_frame_rate + 1) >= start.x && (_x_pos + _x_vel*10.0f/_frame_rate + 1) <= end.x
ellisbhastroud 12:7f7fadb5c106 206 && (_y_pos + _y_vel*10.0f/_frame_rate - 1) >= start.y && (_y_pos + _y_vel*10.0f/_frame_rate - 1) <= end.y) {
ellisbhastroud 12:7f7fadb5c106 207
ellisbhastroud 12:7f7fadb5c106 208 swap(_x_vel, _y_vel); //reflects from wall with velocity directions swapped
ellisbhastroud 12:7f7fadb5c106 209 }
ellisbhastroud 12:7f7fadb5c106 210 }