ELEC2645 (2017/18)
/
ll13jrm
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Dependencies: mbed
Snake/Snake.cpp
- Committer:
- JRM1986
- Date:
- 2018-04-06
- Revision:
- 11:e260c17a0489
- Parent:
- 10:62d8cb7742c3
- Child:
- 12:9f2f64016f56
File content as of revision 11:e260c17a0489:
#include "Snake.h"
Snake::Snake()
{
}
Snake::~Snake()
{
}
void Snake::init()
{
_x = 41;
_y = 23;
_next = W;
}
void Snake::update(Direction in, Direction cur)
{
set_snake_direction(in, cur);
Direction next = get_snake_direction();
//set_current_direction(next);
cur = get_current_direction();
set_snake_position(next);
Vector2D pos = get_snake_position();
}
void Snake::draw(N5110 &lcd)
{
lcd.setPixel(_x, _y, true);
}
void Snake::set_snake_direction(Direction input, Direction current)
{
switch(current) {
case CENTRE:
switch(input) {
case CENTRE:
_next = current;
break;
case N:
_next = input;
break;
case E:
_next = input;
break;
case S:
_next = input;
break;
case W:
_next = input;
break;
default:
_next = current;
error("Invalid state");
break;
}
break;
case N:
switch(input) {
case CENTRE:
_next = current;
break;
case N:
_next = input;
break;
case E:
_next = input;
break;
case S:
_next = current;
break;
case W:
_next = input;
break;
default:
_next = current;
error("Invalid state");
break;
}
break;
case E:
switch(input) {
case CENTRE:
_next = current;
break;
case N:
_next = input;
break;
case E:
_next = current;
break;
case S:
_next = current;
break;
case W:
_next = input;
break;
default:
_next = current;
error("Invalid state");
break;
}
break;
case S:
switch(input) {
case CENTRE:
_next = current;
break;
case N:
_next = current;
break;
case E:
_next = input;
break;
case S:
_next = current;
break;
case W:
_next = input;
break;
default:
_next = current;
error("Invalid state");
break;
}
break;
case W:
switch(input) {
case CENTRE:
_next = current;
break;
case N:
_next = input;
break;
case E:
_next = current;
break;
case S:
_next = input;
break;
case W:
_next = current;
break;
default:
_next = current;
error("Invalid state (input)");
break;
}
break;
default:
error("Invalid state (current)");
break;
}
}
Direction Snake::get_snake_direction()
{
Direction d = _next;
return d;
}
/*
void Snake::set_current_direction(Direction new_cur)
{
_next = new_cur;
}*/
Direction Snake::get_current_direction()
{
Direction d = _next;
return d;
}
void Snake::set_snake_position(Direction next)
{
next = get_snake_direction();
Vector2D p;
switch(next) {
case(N):
p.x = p.x;
--p.y;
break;
case(E):
++p.x;
p.y = p.y;
break;
case(S):
p.x = p.x;
++p.y;
break;
case(W):
--p.x;
p.y = p.y;
break;
default:
p.x = p.x;
p.y = p.y;
break;
}
_x = p.x;
_y = p.y;
}
Vector2D Snake::get_snake_position()
{
Vector2D pos = {_x, _y};
return pos;
}
// FSM Attempt
/*
int state = N;
StateDirection fsm[4] = {
{N,{N,E,N,W}},
{E,{N,E,S,E}},
{S,{S,E,S,W}},
{W,{N,W,S,W}}
};
_direction = fsm[state].output; // set ouput depending on current state
state = fsm[state].nextState[input]; // read input and update curent state
*/