James Heavey
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EL17JH
FINAL VERSION
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Paddle.cpp
00001 #include "Paddle.h" 00002 00003 FXOS8700CQ accelerometer(I2C_SDA,I2C_SCL); 00004 00005 Paddle::Paddle() 00006 { 00007 00008 } 00009 00010 Paddle::~Paddle() 00011 { 00012 00013 } 00014 00015 void Paddle::init(int y,int height,int width) 00016 { 00017 _x = WIDTH/2 - width/2; // initialised in the centre of the screen 00018 _y = y; // fixed at the bottom of the screen, initialised by _paddley in engine 00019 _height = height; // paddle height, defined at init 00020 _width = width; // paddle width, defined at init 00021 _sens = 0.5; // default sensitivity of tilt/joystick 00022 _speed = 4; // default speed = _speed * _sens 00023 _lives = 6; // number of lives = number of LEDs 00024 _tilt = false; //used to choose between motion methods 00025 00026 } 00027 00028 00029 void Paddle::draw(N5110 &lcd) 00030 { 00031 lcd.drawRect(_x,_y,_width,_height,FILL_BLACK); // draw paddle at specified coordinates 00032 } 00033 00034 00035 void Paddle::update(Direction d,float mag) // update the paddle's properties 00036 { 00037 if (_tilt == false) { 00038 _speed = int(mag*10.0f); // scale is arbitrary 00039 00040 // update x value depending on direction of movement 00041 // West is decrement as origin is at the top-left so decreasing moves left 00042 if (d == W) { 00043 _x-=_speed * _sens; // adjust the x coordinate accordingly. Sensitivity scales the speed of the paddle 00044 } else if (d == E) { 00045 _x+=_speed * _sens; 00046 } 00047 00048 // censure that the paddle doesn't go off screen 00049 if (_x < 1) { 00050 _x = 1; 00051 } 00052 if (_x > WIDTH - _width - 1) { 00053 _x = WIDTH - _width - 1; 00054 } 00055 } else if (_tilt == true) { 00056 accelerometer.init(); // initialise the accelerometer 00057 Data values = accelerometer.get_values(); // retrieve a struct of values 00058 float roll_rad = atan2(values.ay,values.az); // use values to calculate the roll angle in radians 00059 _speed = int((roll_rad*(360/3.14159265))*0.3f); // convert to degrees and scale 00060 _x -= _speed * _sens; // adjust the x coordinate accordingly 00061 } 00062 00063 // ensure that the paddle doesn't go off screen 00064 if (_x < 1) { 00065 _x = 1; 00066 } 00067 if (_x > WIDTH - _width - 1) { 00068 _x = WIDTH - _width - 1; 00069 } 00070 } 00071 00072 00073 int Paddle::get_lives() // returns the integer _lives 00074 { 00075 return _lives; 00076 } 00077 00078 00079 void Paddle::lose_life() // decrements the member variable _lives 00080 { 00081 _lives--; 00082 } 00083 00084 00085 void Paddle::inc_life() // increment the member variable _lives 00086 { 00087 _lives++; 00088 } 00089 00090 00091 void Paddle::reset_lives() 00092 { 00093 _lives = 6; 00094 } 00095 00096 00097 Vector2D Paddle::get_pos() // returns the vector of the paddle's current position 00098 { 00099 Vector2D p = {_x,_y}; 00100 return p; 00101 } 00102 00103 00104 void Paddle::set_tilt() // sets the paddle motion option to tilt i.e. the member variable _tilt = true 00105 { 00106 _tilt = true; 00107 } 00108 00109 00110 void Paddle::set_joy() // sets the paddle motion option to joystick 00111 { 00112 _tilt = false; 00113 } 00114 00115 00116 void Paddle::recentre() // moves the paddle back to the centre of the screen (used after victory screen to restart) 00117 { 00118 _x = WIDTH/2 - PADDLE_WIDTH/2; // centre of the screen 00119 } 00120 00121 00122 void Paddle::set_sens(float sens) // sets the member variable _sens to an input 00123 { 00124 _sens = sens; 00125 }
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