ELEC2645 (2018/19) / Mbed 2 deprecated el17m2h_public

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Dependencies:   mbed

Doodler/Doodler.cpp@9:5e53bca2a4c2, 2019-04-16 (annotated)

Committer:
el17m2h
Date:
Tue Apr 16 19:51:12 2019 +0000
Revision:
9:5e53bca2a4c2
Parent:
8:90e789413e0b
Child:
10:e1d2289705ef
Changed the values of the positions and velocities to vectors so that they are easier to manipulate. I made use of the float absolute function (fabs) function to make the ball decelerate to a zero velocity while going upwards.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
el17m2h 4:8ec314f806ae 1 #include "Doodler.h"
el17m2h 4:8ec314f806ae 2 Doodler::Doodler(){
el17m2h 4:8ec314f806ae 3 }
el17m2h 4:8ec314f806ae 4 Doodler::~Doodler(){
el17m2h 4:8ec314f806ae 5 }
el17m2h 4:8ec314f806ae 6
el17m2h 5:8814d6de77d0 7 void Doodler::init(int radius){
el17m2h 7:0d9cee90ab0d 8 // initial position of doodler at centre
el17m2h 5:8814d6de77d0 9 _radius = radius;
el17m2h 9:5e53bca2a4c2 10 _pos.x = (70/2)+6;
el17m2h 9:5e53bca2a4c2 11 _pos.y = 24;
el17m2h 8:90e789413e0b 12 _velocity.y = 1.5; // dropped down
el17m2h 8:90e789413e0b 13 _gravity = 1.5; // moves down
el17m2h 9:5e53bca2a4c2 14 _up = -0.2;
el17m2h 4:8ec314f806ae 15 }
el17m2h 4:8ec314f806ae 16
el17m2h 4:8ec314f806ae 17 void Doodler::draw(N5110 &lcd){
el17m2h 9:5e53bca2a4c2 18 lcd.drawCircle(_pos.x, _pos.y, _radius, FILL_BLACK);
el17m2h 4:8ec314f806ae 19 }
el17m2h 4:8ec314f806ae 20
el17m2h 9:5e53bca2a4c2 21 void Doodler::update(Direction d, float mag, Vector2D current_vel){
el17m2h 9:5e53bca2a4c2 22 //////////////////////////// y - direction of doodler /////////////////////////////////////
el17m2h 8:90e789413e0b 23 _current_vel = current_vel;
el17m2h 5:8814d6de77d0 24
el17m2h 9:5e53bca2a4c2 25 if (_current_vel.y > 0 ){ // no jump
el17m2h 9:5e53bca2a4c2 26 _velocity.y *= _gravity; // falls accelerating
el17m2h 8:90e789413e0b 27 } else if(_current_vel.y < 0){ // jump has started and continues
el17m2h 9:5e53bca2a4c2 28 _velocity.y = -(_velocity.y*_up); // jumps decelerating upwards (0<_up<1 so _velocity.y reaches 0)
el17m2h 9:5e53bca2a4c2 29 } else if (_current_vel.y == 0) { // jumping has finished
el17m2h 9:5e53bca2a4c2 30 _velocity.y = _gravity;
el17m2h 9:5e53bca2a4c2 31 }
el17m2h 9:5e53bca2a4c2 32 _pos.y += _velocity.y;
el17m2h 8:90e789413e0b 33
el17m2h 9:5e53bca2a4c2 34 /////////////////////////// x - direction of doodler /////////////////////////////////////////
el17m2h 9:5e53bca2a4c2 35 _velocity.x = int(mag*5.0f); // 5 frames times the magnitude of the joystick (int holds that value)
el17m2h 5:8814d6de77d0 36 if (d == W){ // if direction is left
el17m2h 9:5e53bca2a4c2 37 _pos.x -= _velocity.x;
el17m2h 5:8814d6de77d0 38 } else if (d == E){
el17m2h 9:5e53bca2a4c2 39 _pos.x += _velocity.x;
el17m2h 8:90e789413e0b 40 }
el17m2h 7:0d9cee90ab0d 41
el17m2h 9:5e53bca2a4c2 42 // checking doodler does not leave screen:
el17m2h 9:5e53bca2a4c2 43 if (_pos.x > WIDTH-4){ // right side
el17m2h 9:5e53bca2a4c2 44 _pos.x = WIDTH-4;
el17m2h 9:5e53bca2a4c2 45 }
el17m2h 9:5e53bca2a4c2 46 if (_pos.x < _radius){ // left side
el17m2h 9:5e53bca2a4c2 47 _pos.x = _radius;
el17m2h 9:5e53bca2a4c2 48 }
el17m2h 9:5e53bca2a4c2 49 set_position(_pos);
el17m2h 9:5e53bca2a4c2 50 set_velocity(_velocity);
el17m2h 4:8ec314f806ae 51 }
el17m2h 4:8ec314f806ae 52
el17m2h 7:0d9cee90ab0d 53 Vector2D Doodler::get_position(){
el17m2h 9:5e53bca2a4c2 54 Vector2D p = {_pos.x, _pos.y};
el17m2h 4:8ec314f806ae 55 return p;
el17m2h 4:8ec314f806ae 56 }
el17m2h 7:0d9cee90ab0d 57
el17m2h 7:0d9cee90ab0d 58 Vector2D Doodler::get_velocity(){
el17m2h 7:0d9cee90ab0d 59 Vector2D v = {_velocity.x, _velocity.y};
el17m2h 7:0d9cee90ab0d 60 return v;
el17m2h 7:0d9cee90ab0d 61 }
el17m2h 7:0d9cee90ab0d 62
el17m2h 7:0d9cee90ab0d 63 void Doodler::set_velocity(Vector2D v){
el17m2h 7:0d9cee90ab0d 64 _velocity.x = v.x;
el17m2h 7:0d9cee90ab0d 65 _velocity.y = v.y;
el17m2h 7:0d9cee90ab0d 66 }
el17m2h 7:0d9cee90ab0d 67
el17m2h 7:0d9cee90ab0d 68 void Doodler::set_position(Vector2D p){
el17m2h 9:5e53bca2a4c2 69 _pos.x = p.x;
el17m2h 9:5e53bca2a4c2 70 _pos.y = p.y;
el17m2h 7:0d9cee90ab0d 71 }