James Heavey
/
EL17JH
FINAL VERSION
Ball/Ball.cpp@93:18f81996ea89, 2019-05-06 (annotated)
- Committer:
- jamesheavey
- Date:
- Mon May 06 23:31:30 2019 +0000
- Revision:
- 93:18f81996ea89
- Parent:
- 91:c01a736fb0d9
- Child:
- 136:04a2724f90cf
cp
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
jamesheavey | 0:7d4d2023ed9c | 1 | #include "Ball.h" |
jamesheavey | 0:7d4d2023ed9c | 2 | |
jamesheavey | 0:7d4d2023ed9c | 3 | Ball::Ball() |
jamesheavey | 0:7d4d2023ed9c | 4 | { |
jamesheavey | 0:7d4d2023ed9c | 5 | |
jamesheavey | 0:7d4d2023ed9c | 6 | } |
jamesheavey | 0:7d4d2023ed9c | 7 | |
jamesheavey | 0:7d4d2023ed9c | 8 | Ball::~Ball() |
jamesheavey | 0:7d4d2023ed9c | 9 | { |
jamesheavey | 0:7d4d2023ed9c | 10 | |
jamesheavey | 0:7d4d2023ed9c | 11 | } |
jamesheavey | 0:7d4d2023ed9c | 12 | |
jamesheavey | 76:52410264a72d | 13 | void Ball::init(int size,int speed, int x) |
jamesheavey | 0:7d4d2023ed9c | 14 | { |
jamesheavey | 85:6b21dc88f2fc | 15 | _size = size; // size of the ball |
jamesheavey | 0:7d4d2023ed9c | 16 | |
jamesheavey | 85:6b21dc88f2fc | 17 | _x = x; // init position of the ball will be at the centre of the paddle |
jamesheavey | 93:18f81996ea89 | 18 | _y = HEIGHT - _size/2 - 3; // fixed y init position, just above the paddle |
jamesheavey | 0:7d4d2023ed9c | 19 | |
jamesheavey | 0:7d4d2023ed9c | 20 | srand(time(NULL)); |
jamesheavey | 91:c01a736fb0d9 | 21 | int direction = rand() % 2; // randomise initial direction. |
jamesheavey | 0:7d4d2023ed9c | 22 | |
jamesheavey | 85:6b21dc88f2fc | 23 | // 2 directions, both directed upwards (N) from the paddle |
jamesheavey | 0:7d4d2023ed9c | 24 | if (direction == 0) { |
jamesheavey | 85:6b21dc88f2fc | 25 | _velocity.x = speed; // direction = E |
jamesheavey | 85:6b21dc88f2fc | 26 | _velocity.y = -speed; // direction = N |
jamesheavey | 0:7d4d2023ed9c | 27 | } else { |
jamesheavey | 85:6b21dc88f2fc | 28 | _velocity.x = -speed; // direction = W |
jamesheavey | 85:6b21dc88f2fc | 29 | _velocity.y = -speed; // direction = N |
jamesheavey | 0:7d4d2023ed9c | 30 | } |
jamesheavey | 0:7d4d2023ed9c | 31 | } |
jamesheavey | 0:7d4d2023ed9c | 32 | |
jamesheavey | 85:6b21dc88f2fc | 33 | void Ball::draw(N5110 &lcd) // draw the ball at the specified location |
jamesheavey | 0:7d4d2023ed9c | 34 | { |
jamesheavey | 0:7d4d2023ed9c | 35 | lcd.drawRect(_x,_y,_size,_size,FILL_BLACK); |
jamesheavey | 0:7d4d2023ed9c | 36 | } |
jamesheavey | 0:7d4d2023ed9c | 37 | |
jamesheavey | 85:6b21dc88f2fc | 38 | void Ball::update() // update the ball's position, based on its current velocity |
jamesheavey | 0:7d4d2023ed9c | 39 | { |
jamesheavey | 0:7d4d2023ed9c | 40 | _x += _velocity.x; |
jamesheavey | 0:7d4d2023ed9c | 41 | _y += _velocity.y; |
jamesheavey | 0:7d4d2023ed9c | 42 | } |
jamesheavey | 0:7d4d2023ed9c | 43 | |
jamesheavey | 85:6b21dc88f2fc | 44 | void Ball::set_velocity(Vector2D v) // set the velocity in its x/y directions (used for collision velocity correction) |
jamesheavey | 0:7d4d2023ed9c | 45 | { |
jamesheavey | 0:7d4d2023ed9c | 46 | _velocity.x = v.x; |
jamesheavey | 0:7d4d2023ed9c | 47 | _velocity.y = v.y; |
jamesheavey | 0:7d4d2023ed9c | 48 | } |
jamesheavey | 0:7d4d2023ed9c | 49 | |
jamesheavey | 85:6b21dc88f2fc | 50 | Vector2D Ball::get_velocity() // retrieve the ball's current velocities |
jamesheavey | 0:7d4d2023ed9c | 51 | { |
jamesheavey | 0:7d4d2023ed9c | 52 | Vector2D v = {_velocity.x,_velocity.y}; |
jamesheavey | 0:7d4d2023ed9c | 53 | return v; |
jamesheavey | 0:7d4d2023ed9c | 54 | } |
jamesheavey | 0:7d4d2023ed9c | 55 | |
jamesheavey | 85:6b21dc88f2fc | 56 | Vector2D Ball::get_pos() // retrieve the ball's current coordinates |
jamesheavey | 0:7d4d2023ed9c | 57 | { |
jamesheavey | 0:7d4d2023ed9c | 58 | Vector2D p = {_x,_y}; |
jamesheavey | 0:7d4d2023ed9c | 59 | return p; |
jamesheavey | 0:7d4d2023ed9c | 60 | } |
jamesheavey | 0:7d4d2023ed9c | 61 | |
jamesheavey | 85:6b21dc88f2fc | 62 | void Ball::set_pos(Vector2D p) // set the ball's coordinates (used for collision velocity correction) |
jamesheavey | 0:7d4d2023ed9c | 63 | { |
jamesheavey | 0:7d4d2023ed9c | 64 | _x = p.x; |
jamesheavey | 0:7d4d2023ed9c | 65 | _y = p.y; |
jamesheavey | 0:7d4d2023ed9c | 66 | } |