Ball.cpp

00001 #include "Ball.h"
00002 
00003 Ball::Ball()
00004 {
00005 
00006 }
00007 
00008 Ball::~Ball()
00009 {
00010 
00011 }
00012 
00013 void Ball::init(int size,int speed)
00014 {
00015     _size = size;
00016 
00017     _x = WIDTH/2 -  _size/2;
00018     _y = HEIGHT/2 - _size/2;
00019 
00020     srand(time(NULL));
00021     int direction = rand() % 4; // randomise initial direction. 
00022 
00023     // 4 possibilities. Get random modulo and set velocities accordingly
00024     if (direction == 0) {
00025         _velocity.x = speed;
00026         _velocity.y = speed;
00027     } else if (direction == 1) {
00028         _velocity.x = speed;
00029         _velocity.y = -speed;
00030     } else if (direction == 2) {
00031         _velocity.x = speed;
00032         _velocity.y = speed;
00033     } else {
00034         _velocity.x = -speed;
00035         _velocity.y = -speed;
00036     }
00037 }
00038 
00039 void Ball::draw(N5110 &lcd)
00040 {
00041     lcd.drawRect(_x,_y,_size,_size,FILL_BLACK);
00042 }
00043 
00044 void Ball::update()
00045 {
00046     _x += _velocity.x;
00047     _y += _velocity.y;
00048 }
00049 
00050 void Ball::set_velocity(Vector2D v)
00051 {
00052     _velocity.x = v.x;
00053     _velocity.y = v.y;
00054 }
00055 
00056 Vector2D Ball::get_velocity()
00057 {
00058     Vector2D v = {_velocity.x,_velocity.y};
00059     return v;
00060 }
00061 
00062 Vector2D Ball::get_pos()
00063 {
00064     Vector2D p = {_x,_y};
00065     return p;
00066 }
00067 
00068 void Ball::set_pos(Vector2D p)
00069 {
00070     _x = p.x;
00071     _y = p.y;
00072 }