Diff: SnakeBody/SnakeBody.cpp

Revision:

13:7b7ec5db56b2

Parent:

10:a2d643b3c782

Child:

14:2dfe04ced21c

--- a/SnakeBody/SnakeBody.cpp	Tue May 26 23:57:47 2020 +0000
+++ b/SnakeBody/SnakeBody.cpp	Wed May 27 00:59:14 2020 +0000
@@ -2,8 +2,8 @@
 
 SnakeBody::SnakeBody()
 {
-    _x_head = 42;
-    _y_head = 24;
+    head_x = 42;
+    head_y = 24;
     _length = 4;
     _length_increase = 4;
     _angle = -1.0;
@@ -18,16 +18,16 @@
 
 void SnakeBody::init()
 {
-    _body_x.clear();
-    _body_x.push_back(42);
-    _body_y.clear();
-    _body_y.push_back(24);
+    body_x.clear();
+    body_x.push_back(42);
+    body_y.clear();
+    body_y.push_back(24);
 }
 
 void SnakeBody::update_direction()
 {
 
-    if ((_x_head % 2) + (_y_head % 2) == 0) {   // only allows changing movement when the snake is cell-aligned (ie x and y are even)
+    if ((head_x % 2) + (head_y % 2) == 0) {   // only allows changing movement when the snake is cell-aligned (ie x and y are even)
         // partition 360 into segments and check which segment the angle is in
         printf("D: %d\n", _d);
         if (_angle < 0.0f) {          //check for -1.0 angle
@@ -60,14 +60,14 @@
     _move_state = _fsm[_move_state].nextState[_d]; // adjusts fsm state based on direction
     //printf("State: %d\n", _move_state);
 
-    _x_head += _fsm[_move_state].delta_x; // increments x value based on fsm state value
-    _y_head += _fsm[_move_state].delta_y; // increments y value based on fsm state value
+    head_x += _fsm[_move_state].delta_x; // increments x value based on fsm state value
+    head_y += _fsm[_move_state].delta_y; // increments y value based on fsm state value
 
-    _x_head = ((_x_head % 84) + 84) % 84; // wraps x back to within range 0-83
-    _y_head = ((_y_head % 48) + 48) % 48; // wraps y back to within range 0-47
+    head_x = ((head_x % 84) + 84) % 84; // wraps x back to within range 0-83
+    head_y = ((head_y % 48) + 48) % 48; // wraps y back to within range 0-47
 
-    //printf("x_head: %d\n", _x_head);
-    //printf("y_head: %d\n", _y_head);
+    //printf("head_x: %d\n", head_x);
+    //printf("head_y: %d\n", head_y);
 };
 
 void SnakeBody::snake_movement(Gamepad &pad)
@@ -82,12 +82,12 @@
 
 void SnakeBody::update_body()
 {
-    if ((_x_head % 2) + (_y_head % 2) == 0) {        //only updates body when cell aligned
-        _body_x.insert(_body_x.begin(), _x_head);    //sets first array element to head coordinates
-        _body_y.insert(_body_y.begin(), _y_head);
+    if ((head_x % 2) + (head_y % 2) == 0) {        //only updates body when cell aligned
+        body_x.insert(body_x.begin(), head_x);    //sets first array element to head coordinates
+        body_y.insert(body_y.begin(), head_y);
 
-        _body_x.erase(_body_x.begin() + _length, _body_x.end()); //erases all elements from position after tail (ie [_length])
-        _body_y.erase(_body_y.begin() + _length, _body_y.end()); //up to end of vector
+        body_x.erase(body_x.begin() + _length, body_x.end()); //erases all elements from position after tail (ie [_length])
+        body_y.erase(body_y.begin() + _length, body_y.end()); //up to end of vector
     }
     if(_length_increase > 0) { //converts length increase into length, one unit at a time
         _length++;
@@ -98,9 +98,9 @@
 
 void SnakeBody::draw_body(N5110 &lcd)
 {
-    lcd.drawRect(_x_head,_y_head,2,2,FILL_BLACK); //draws square at head (so new head coords displayed even when not cell-aligned) 
+    lcd.drawRect(head_x, head_y, 2, 2, FILL_BLACK); //draws square at head (so new head coords displayed even when not cell-aligned) 
     for(int i = 0; i < _length - 3; i++) { //iterates across vector to draw sqaures at every position
-        lcd.drawRect(_body_x[i],_body_y[i],2,2,FILL_BLACK);
+        lcd.drawRect(body_x[i], body_y[i], 2, 2, FILL_BLACK);
     }
 }
 
@@ -108,7 +108,7 @@
 {
     if (_move_state > 0) { //if body has started to move
         for(int i = 3; i < _length - 3; i++) { //only checks from 3rd cell onwards since head can't collide with very start of body
-            if (_x_head == _body_x[i] && _y_head == _body_y[i]) { //checks if head coord is the same as any of the body coords
+            if (head_x == body_x[i] && head_y == body_y[i]) { //checks if head coord is the same as any of the body coords
                 //printf("S-S Collison \n");
                 _move_state = 0;
                 _death = true;
@@ -131,10 +131,10 @@
 
 void SnakeBody::reset()
 {
-    _x_head = 42;
-    _y_head = 24;
-    for(int i = 3; i < _body_y.size(); i++) {
-        _body_y.at(i) = 50;
+    head_x = 42;
+    head_y = 24;
+    for(int i = 3; i < body_y.size(); i++) { 
+        body_y.at(i) = 50; //moves all body coordinates off-screen
     }
     _length = 4;
     _length_increase = 4;