/************ CarControllerPC

*PC Side program to send commands over serial to control the RC Car

*RC Car controlled by attached arduino contianing code that admits
 serial commands and changes pwm values for pins attached to 
 the control tranisistors of the Motor H-Bridges
 
*The arduino is expecting a command of the following sturcture:

    -2 Bytes of Data, sent serially.  
 
  | 0 0 0 0 0 0 0 0 | | 0 0 0 0 0 0 0 0 |
     Forward/Back         Left/Right
     
    -'Signed' for determining direction, so the first bit in each byte 
     will determine the direction.  

    - 1 = Forward/Left  0 = Back/Right

******************************/

boolean forward;
boolean back;
boolean left;
boolean right;

void setup() {
  
  size(640, 360); 
  
}


void draw() {
    
    
  reactToPressedKeys();
    /*
      -Check the array storing the boolean values for whether or not
       the keys I care about are down (WASD)
      -If they are down, change variables for drawing buttons/display
      -Might have to track the time they have been pressed, or increment a
       counter to see how many cycles its been pressed
           *Will be used to 'ramp up' the speed when W/S are pressed
           *Wont really matter for A/D because the turning motor is hella-fast
    */
  drawButtons();
    /*
      -Draw a WASD diamond
      -If a button is being pressed, change its colors to inversions of its not
       pressed state
    */
  drawDisplay();
    /*
      For Forward/Back (W/S):
        -Draw a slim, vertical rectangle
        -Draw a line in the middle of it ('0-Point')
        -Do some math with "HowLongHaveIBeenDown" (from above) to determine
         the posistion of a line representing the speed of the F/B (W/S) motor
             *Only needs to show 'relative' speed, as in, a % of the max PWM value
      For Left/Right (A/D):
        -Draw a semi circle
        -Draw a point at the 'center' of the semi circle
        -If left, draw a line segment from center to left most semicircle point
        -If right, draw a line segment from center to right most semicircle point
        -If notPressed, draw a line segment from center to center semicircle point
     
     */
     
  //sendCommand();  //for later - once i can push buttons, i'll worry about comm
}

void keyPressed() {
  /*
    When a key is pressed, ill check if its one i care about, and if it is, ill set its
    boolean to true. 
  */  
  setKeytoPressed(key);
}

void keyReleased() {
 /* 
    When a key is released, ill check to see if its one i care about, then i'll set its
    boolean to false
 */ 
 setKeytoNotPressed(key); 
}