ELEC2645 (2017/18)
Final Commit
Dependencies: mbed
Diff: SnakeEngine/SnakeEngine.cpp
- Revision:
- 24:4b180348826e
- Parent:
- 23:3081be418c89
- Child:
- 25:f03439ee32c6
--- a/SnakeEngine/SnakeEngine.cpp Tue May 01 10:55:49 2018 +0000
+++ b/SnakeEngine/SnakeEngine.cpp Tue May 01 12:20:42 2018 +0000
@@ -12,133 +12,6 @@
}
///////////////// global methods /////////////////
-
-///////////////// public methods /////////////////
-
-
-void SnakeEngine::set_even_array(Gamepad &pad)
-{
-
- int i;
- int length = g_tl;
-
- extern int g_odd_array_x[100];
- extern int g_odd_array_y[100];
-
- Vector2D pos = _snake.get_snake_position();
-
- g_odd_array_x[0] = pos.x;
- g_odd_array_y[0] = pos.y;
-
- for(i = length; i >= 0; --i) {
-
- if(i > 0) {
-
- g_even_array_x[i] = g_odd_array_x[i-1];
- g_even_array_y[i] = g_odd_array_y[i-1];
-
- }
-
- else if(i == 0) {
-
- g_even_array_x[0] = pos.x;
- g_even_array_y[0] = pos.y;
-
- }
-
-
- }
-
-}
-
-void SnakeEngine::set_odd_array(Gamepad &pad)
-{
-
- int i;
- int length = g_tl;
-
- extern int g_even_array_x[100];
- extern int g_even_array_y[100];
-
- Vector2D pos = _snake.get_snake_position();
-
- g_even_array_x[0] = pos.x;
- g_even_array_y[0] = pos.y;
-
- for(i = length; i >= 0; --i) {
-
- if(i > 0) {
-
- g_odd_array_x[i] = g_even_array_x[i-1];
- g_odd_array_y[i] = g_even_array_y[i-1];
-
- }
-
- else if(i == 0) {
-
- g_odd_array_x[0] = pos.x;
- g_odd_array_y[0] = pos.y;
-
- }
-
- }
-
-}
-
-
-void SnakeEngine::set_tail_array(Gamepad &pad)
-{
-
- int c = g_engine_fc % 2;
-
- if(c == 1) {
-
- set_odd_array(pad);
-
- }
-
- else if (c == 0) {
-
- set_even_array(pad);
-
- }
-
-}
-
-void SnakeEngine::draw_tail(N5110 &lcd)
-{
- int length = g_tl;
- int c;
- c = g_engine_fc % 2;
- int i;
- int x;
- int y;
-
- //printf("Odd/Even %i \n", c);
-
- for(i=0; i<=length; ++i) {
-
- if(c == 1) {
-
- x = g_odd_array_x[i];
- y = g_odd_array_y[i];
-
- lcd.setPixel(x,y,true);
-
- }
-
- else if (c == 0) {
-
- x = g_even_array_x[i];
- y = g_even_array_y[i];
-
- lcd.setPixel(x,y,true);
-
- }
-
- }
-}
-
int g_tail_length()
{
@@ -149,6 +22,8 @@
}
+///////////////// public methods /////////////////
+
void SnakeEngine::init(Direction in, Direction cur, int snake_pos_x, int snake_pos_y)
{
_snake_pos_x = snake_pos_x;
@@ -162,16 +37,8 @@
}
-void SnakeEngine::get_input(Gamepad &pad)
-{
-
- _in = pad.get_direction();
-
-}
-
void SnakeEngine::update(Gamepad &pad)
{
- //int length;
bool food_col;
++g_engine_fc;
@@ -180,8 +47,6 @@
food_col = detect_food_collision(pad);
_collision = food_col;
set_tail_length(food_col);
- //length = get_tail_length();
- //printf("Tail Length = %i \n", length);
set_tail_array(pad);
}
@@ -190,18 +55,67 @@
void SnakeEngine::draw(N5110 &lcd)
{
+ // puts fram around the game area
+
lcd.drawRect(0,0,WIDTH,HEIGHT,FILL_TRANSPARENT);
lcd.setContrast(0.5);
+
_food.update(_collision);
_food.draw(lcd);
- //_snake.draw(lcd);
- //draw_tail(lcd);
- //_snake.update(_in, _cur);
_snake.draw(lcd);
draw_tail(lcd);
}
+
+void SnakeEngine::draw_tail(N5110 &lcd)
+{
+ int length = g_tl;
+ int c;
+ c = g_engine_fc % 2;
+ int i;
+ int x;
+ int y;
+
+ //printf("Odd/Even %i \n", c);
+
+ // runs through each segment in the tail and draws to the lcd
+
+ for(i=0; i<=length; ++i) {
+
+ // when odd draw odd array
+
+ if(c == 1) {
+
+ x = g_odd_array_x[i];
+ y = g_odd_array_y[i];
+
+ lcd.setPixel(x,y,true);
+
+ }
+
+ // when even draw the even array
+
+ else if (c == 0) {
+
+ x = g_even_array_x[i];
+ y = g_even_array_y[i];
+
+ lcd.setPixel(x,y,true);
+
+ }
+
+ }
+}
+
+
+void SnakeEngine::get_input(Gamepad &pad)
+{
+
+ _in = pad.get_direction();
+
+}
+
bool SnakeEngine::detect_food_collision(Gamepad &pad)
{
Vector2D snake_pos = _snake.get_snake_position();
@@ -209,6 +123,8 @@
bool success_flag = false;
+ // when the position of the head and food are the same return true
+
if((snake_pos.x == food_pos.x) && (snake_pos.y == food_pos.y)) {
success_flag = true;
@@ -232,6 +148,8 @@
bool success_flag = false;
+ // when an snake position is at an edge return true
+
if((snake_pos.x == (0 || 84)) || (snake_pos.y == (0 || 48))) {
success_flag = true;
@@ -245,6 +163,7 @@
void SnakeEngine::set_tail_length(bool collision_detected)
{
+ // when a collision is detected increment the tail length
if(collision_detected) {
@@ -268,6 +187,115 @@
return length;
}
+
+void SnakeEngine::set_odd_array(Gamepad &pad)
+{
+
+ int i;
+ int length = g_tl;
+
+ extern int g_even_array_x[100];
+ extern int g_even_array_y[100];
+
+ Vector2D pos = _snake.get_snake_position();
+
+ // sets the first value in the array to the new position
+
+ g_even_array_x[0] = pos.x;
+ g_even_array_y[0] = pos.y;
+
+ // starting from the last element in the arrays work back to zero
+
+ for(i = length; i >= 0; --i) {
+
+ // switch positions of the indexes adding the new head position
+
+ if(i > 0) {
+
+ g_odd_array_x[i] = g_even_array_x[i-1];
+ g_odd_array_y[i] = g_even_array_y[i-1];
+
+ }
+
+ // when snake has no length position 0 is the new position
+
+ else if(i == 0) {
+
+ g_odd_array_x[0] = pos.x;
+ g_odd_array_y[0] = pos.y;
+
+ }
+
+ }
+
+}
+
+void SnakeEngine::set_even_array(Gamepad &pad)
+{
+
+ int i;
+ int length = g_tl;
+
+ extern int g_odd_array_x[100];
+ extern int g_odd_array_y[100];
+
+ Vector2D pos = _snake.get_snake_position();
+
+ // sets the first value in the array to the new position
+
+ g_odd_array_x[0] = pos.x;
+ g_odd_array_y[0] = pos.y;
+
+ // starting from the last element in the arrays work back to zero
+
+ for(i = length; i >= 0; --i) {
+
+ // switch positions of the indexes adding the new head position
+
+ if(i > 0) {
+
+ g_even_array_x[i] = g_odd_array_x[i-1];
+ g_even_array_y[i] = g_odd_array_y[i-1];
+
+ }
+
+ // when snake has no length position 0 is the new position
+
+ else if(i == 0) {
+
+ g_even_array_x[0] = pos.x;
+ g_even_array_y[0] = pos.y;
+
+ }
+
+ }
+
+}
+
+
+void SnakeEngine::set_tail_array(Gamepad &pad)
+{
+
+ int c = g_engine_fc % 2;
+
+ // when the frame counter is odd set odd array
+
+ if(c == 1) {
+
+ set_odd_array(pad);
+
+ }
+
+ // when the frame counter is even set even array
+
+ else if (c == 0) {
+
+ set_even_array(pad);
+
+ }
+
+}
+