Max Houghton / MazeEngine

Class used to run the maze game loop.

MazeEngine.cpp@1:5a44ce88c5e2, 2017-04-17 (annotated)

Committer:
el15mh
Date:
Mon Apr 17 08:47:00 2017 +0000
Revision:
1:5a44ce88c5e2
Parent:
0:afee1085c5ef
Child:
2:cbce5d35e7d6
project with wall collision function (not working);

Who changed what in which revision?

UserRevisionLine numberNew contents of line
el15mh 0:afee1085c5ef 1 /*
el15mh 0:afee1085c5ef 2
el15mh 0:afee1085c5ef 3 @file mazeEngine.cpp
el15mh 0:afee1085c5ef 4
el15mh 0:afee1085c5ef 5 (c) Max Houghton 19.03.2017
el15mh 0:afee1085c5ef 6 Roller Maze Project, ELEC2645, Univeristy of Leeds
el15mh 0:afee1085c5ef 7
el15mh 0:afee1085c5ef 8 */
el15mh 0:afee1085c5ef 9
el15mh 0:afee1085c5ef 10 #include "MazeEngine.h"
el15mh 0:afee1085c5ef 11
el15mh 0:afee1085c5ef 12 MazeEngine::MazeEngine()
el15mh 0:afee1085c5ef 13 {
el15mh 0:afee1085c5ef 14
el15mh 0:afee1085c5ef 15 }
el15mh 0:afee1085c5ef 16
el15mh 0:afee1085c5ef 17 MazeEngine::~MazeEngine()
el15mh 0:afee1085c5ef 18 {
el15mh 0:afee1085c5ef 19
el15mh 0:afee1085c5ef 20 }
el15mh 0:afee1085c5ef 21
el15mh 1:5a44ce88c5e2 22 void MazeEngine::init(int mazeIndex,
el15mh 1:5a44ce88c5e2 23 int x,
el15mh 1:5a44ce88c5e2 24 int y,
el15mh 1:5a44ce88c5e2 25 int radius,
el15mh 1:5a44ce88c5e2 26 bool control,
el15mh 1:5a44ce88c5e2 27 bool colour)
el15mh 0:afee1085c5ef 28 {
el15mh 0:afee1085c5ef 29 // maze parameters
el15mh 0:afee1085c5ef 30 _mazeIndex = mazeIndex;
el15mh 0:afee1085c5ef 31
el15mh 1:5a44ce88c5e2 32 // method of controlling
el15mh 1:5a44ce88c5e2 33 _control = control;
el15mh 1:5a44ce88c5e2 34 // _control = false; // set as false just for debugging
el15mh 1:5a44ce88c5e2 35
el15mh 1:5a44ce88c5e2 36 // style of ball
el15mh 1:5a44ce88c5e2 37 _colour = colour;
el15mh 1:5a44ce88c5e2 38
el15mh 0:afee1085c5ef 39 // ball parameters
el15mh 0:afee1085c5ef 40 _radius = radius;
el15mh 0:afee1085c5ef 41 _x = x;
el15mh 0:afee1085c5ef 42 _y = y;
el15mh 0:afee1085c5ef 43
el15mh 0:afee1085c5ef 44 // initialise ball & maze with parameters
el15mh 1:5a44ce88c5e2 45 _ball.init(_x, _y, _radius, _colour);
el15mh 0:afee1085c5ef 46 _maze.init(_mazeIndex);
el15mh 0:afee1085c5ef 47 }
el15mh 0:afee1085c5ef 48
el15mh 0:afee1085c5ef 49 void MazeEngine::readInput(Gamepad &pad, FXOS8700CQ &device)
el15mh 0:afee1085c5ef 50 {
el15mh 1:5a44ce88c5e2 51 if (_control){ // if control is true (default), input comes from joystick
el15mh 1:5a44ce88c5e2 52 readJoystickInput(pad);
el15mh 1:5a44ce88c5e2 53 }
el15mh 1:5a44ce88c5e2 54 else { // if control is false, input comes from accelerometer
el15mh 1:5a44ce88c5e2 55 readAccelerometer(device);
el15mh 1:5a44ce88c5e2 56 }
el15mh 1:5a44ce88c5e2 57 }
el15mh 1:5a44ce88c5e2 58
el15mh 1:5a44ce88c5e2 59 void MazeEngine::readJoystickInput(Gamepad &pad)
el15mh 1:5a44ce88c5e2 60 {
el15mh 1:5a44ce88c5e2 61 // position is a 2D struct for (x,y)
el15mh 1:5a44ce88c5e2 62 position = pad.get_mapped_coord();
el15mh 1:5a44ce88c5e2 63
el15mh 1:5a44ce88c5e2 64 // printf("Joystick inputs: %.2f, %.2f \n", position.x, position.y);
el15mh 1:5a44ce88c5e2 65 }
el15mh 1:5a44ce88c5e2 66
el15mh 1:5a44ce88c5e2 67 void MazeEngine::readAccelerometer(FXOS8700CQ &device)
el15mh 1:5a44ce88c5e2 68 {
el15mh 1:5a44ce88c5e2 69 // acquire values from device
el15mh 1:5a44ce88c5e2 70 Data values = device.get_values();
el15mh 1:5a44ce88c5e2 71
el15mh 1:5a44ce88c5e2 72 // values are between 0 and 90°
el15mh 1:5a44ce88c5e2 73 float pitch = device.getPitchAngle();
el15mh 1:5a44ce88c5e2 74 float roll = device.getRollAngle();
el15mh 1:5a44ce88c5e2 75
el15mh 1:5a44ce88c5e2 76 position.x = pitch / -60; // divide by 60 for increase sensitivity
el15mh 1:5a44ce88c5e2 77 position.y = roll / -60;
el15mh 0:afee1085c5ef 78 }
el15mh 0:afee1085c5ef 79
el15mh 1:5a44ce88c5e2 80 void MazeEngine::checkWallCollision(N5110 &lcd)
el15mh 0:afee1085c5ef 81 {
el15mh 1:5a44ce88c5e2 82 // acquire position of ball
el15mh 1:5a44ce88c5e2 83 // if position on each side of ball is a pixel
el15mh 1:5a44ce88c5e2 84 // block movement in that direction
el15mh 1:5a44ce88c5e2 85
el15mh 1:5a44ce88c5e2 86 Vector2D _position = _ball.getPosition();
el15mh 1:5a44ce88c5e2 87 Vector2D _velocity = _ball.getVelocity();
el15mh 1:5a44ce88c5e2 88
el15mh 1:5a44ce88c5e2 89 int leftSide = _position.x - _radius;
el15mh 1:5a44ce88c5e2 90 int rightSide = _position.x + _radius;
el15mh 1:5a44ce88c5e2 91 int topSide = _position.y - _radius;
el15mh 1:5a44ce88c5e2 92 int lowerSide = _position.y + _radius;
el15mh 1:5a44ce88c5e2 93
el15mh 1:5a44ce88c5e2 94 bool topPixel = lcd.getPixel(_position.x, topSide - 1);
el15mh 1:5a44ce88c5e2 95 bool lowerPixel = lcd.getPixel(_position.x, lowerSide + 1);
el15mh 1:5a44ce88c5e2 96 bool leftPixel = lcd.getPixel(_position.y, leftSide - 1);
el15mh 1:5a44ce88c5e2 97 bool rightPixel = lcd.getPixel(_position.y, rightSide + 1);
el15mh 1:5a44ce88c5e2 98
el15mh 1:5a44ce88c5e2 99 if ((topSide + topPixel) != topSide){ // if the sum is changed by pixel it must be present
el15mh 1:5a44ce88c5e2 100 _velocity.y = 0;
el15mh 1:5a44ce88c5e2 101 printf("Top side hit wall");
el15mh 1:5a44ce88c5e2 102 }
el15mh 0:afee1085c5ef 103
el15mh 1:5a44ce88c5e2 104 if ((lowerSide + lowerPixel) != lowerSide ){
el15mh 1:5a44ce88c5e2 105 _velocity.y = 0;
el15mh 1:5a44ce88c5e2 106 printf("Low side hit wall");
el15mh 1:5a44ce88c5e2 107 }
el15mh 1:5a44ce88c5e2 108
el15mh 1:5a44ce88c5e2 109 if ((leftSide + leftPixel) != leftSide){ // if the sum is changed by pixel it must be present
el15mh 1:5a44ce88c5e2 110 _velocity.y = 0;
el15mh 1:5a44ce88c5e2 111 printf("Left side hit wall");
el15mh 1:5a44ce88c5e2 112 }
el15mh 1:5a44ce88c5e2 113
el15mh 1:5a44ce88c5e2 114 if ((rightSide + rightPixel) != rightSide ){
el15mh 1:5a44ce88c5e2 115 _velocity.y = 0;
el15mh 1:5a44ce88c5e2 116 printf("Right side hit wall");
el15mh 1:5a44ce88c5e2 117 }
el15mh 1:5a44ce88c5e2 118
el15mh 1:5a44ce88c5e2 119 _ball.setVelocity(_velocity);
el15mh 1:5a44ce88c5e2 120 }
el15mh 1:5a44ce88c5e2 121
el15mh 1:5a44ce88c5e2 122
el15mh 1:5a44ce88c5e2 123 void MazeEngine::update(N5110 &lcd)
el15mh 1:5a44ce88c5e2 124 {
el15mh 1:5a44ce88c5e2 125 // changes the location of the ball according to inputs
el15mh 1:5a44ce88c5e2 126 _ball.update(position);
el15mh 1:5a44ce88c5e2 127
el15mh 1:5a44ce88c5e2 128 // reverts the changes if the proposed new position sends ball
el15mh 1:5a44ce88c5e2 129 // into the wall
el15mh 1:5a44ce88c5e2 130 checkWallCollision(lcd);
el15mh 0:afee1085c5ef 131 }
el15mh 0:afee1085c5ef 132
el15mh 0:afee1085c5ef 133 void MazeEngine::draw(N5110 &lcd)
el15mh 0:afee1085c5ef 134 {
el15mh 0:afee1085c5ef 135 _ball.draw(lcd);
el15mh 0:afee1085c5ef 136 _maze.draw(lcd);
el15mh 0:afee1085c5ef 137 }
el15mh 0:afee1085c5ef 138
el15mh 0:afee1085c5ef 139