From 6e262115dc576aad05ab383c3d62d1da0e9a082b Mon Sep 17 00:00:00 2001
From: lshprung <lshprung@yahoo.com>
Date: Fri, 18 Dec 2020 12:23:54 -0800
Subject: Added fruit and scoring functionality

---
 body.c         | 26 ++++++++++++++++++++++++--
 draw.c         | 22 ++++++++++++++++++----
 include/body.h |  2 +-
 3 files changed, 43 insertions(+), 7 deletions(-)

diff --git a/body.c b/body.c
index 4c44fab..ad06411 100644
--- a/body.c
+++ b/body.c
@@ -19,6 +19,7 @@ typedef struct snake{
 //private prototypes
 NODE *makeNode(int x, int y);
 void deleteNode(NODE *np);
+void increaseSnake(SNAKE *sp);
 
 //public functions
 SNAKE *makeSnake(int startx, int starty, int len){
@@ -59,7 +60,7 @@ void deleteSnake(SNAKE *sp){
 	return;
 }
 
-void updateSnake(SNAKE *sp, int dir, int maxx, int maxy, bool *collision){
+void updateSnake(SNAKE *sp, int dir, int maxx, int maxy, bool *collision, int *fruit_loc, bool *fruit, int *score){
 	NODE *np;
 
 	if(sp == NULL) return;
@@ -95,7 +96,16 @@ void updateSnake(SNAKE *sp, int dir, int maxx, int maxy, bool *collision){
 	//update tail pointer
 	sp->tail = np;
 
-	//TODO write checkSnake() which will check to see if the snake had a collision
+	//check if eating fruit
+	if(*fruit && sp->tail->x == *fruit_loc && sp->tail->y == *(fruit_loc + 1)){
+		*fruit = false;
+		(*score)++;
+
+		//need to increase snake size
+		increaseSnake(sp);
+	}
+
+	//check collision
 	*collision = checkSnake(sp, maxx, maxy);
 
 	return;
@@ -165,3 +175,15 @@ void deleteNode(NODE *np){
 
 	return;
 }
+
+void increaseSnake(SNAKE *sp){
+	int xdiff = sp->head->next->x - sp->head->x;
+	int ydiff = sp->head->next->y - sp->head->y;
+	NODE *new = makeNode(sp->head->x - xdiff, sp->head->y - ydiff);
+
+	new->next = sp->head;
+	sp->head = new;
+	sp->length++;
+
+	return;
+}
diff --git a/draw.c b/draw.c
index 25355c7..5ffead6 100644
--- a/draw.c
+++ b/draw.c
@@ -2,6 +2,7 @@
 #include <ncurses.h>
 #include <stdbool.h>
 #include <stdlib.h>
+#include <time.h>
 #include <unistd.h>
 
 #include "include/body.h"
@@ -14,7 +15,7 @@
 //#define DEBUG 1
 
 void updateScore(int which, int score);
-void updateScreen(SNAKE *sp, int dir, bool *collision);
+void updateScreen(SNAKE *sp, int dir, bool *collision, int *fruit_loc, bool *fruit, int *score);
 
 #ifdef DEBUG
 void count_up(void);
@@ -27,10 +28,14 @@ int main(){
 	int input;
 	int dir;
 	bool collision = false;
+	int fruit_loc[2]; //index 0 is x, 1 is y
+	bool fruit_bool = false;
 	int i;
 
 	//TODO consider removing score2 altogether
 
+	srand(time(NULL));
+
 	//TODO implement code to retreive existing high score
 	highscore = 0;
 
@@ -87,7 +92,7 @@ int main(){
 		updateScore(0, score);
 		updateScore(1, highscore);
 		updateScore(2, score2);
-		updateScreen(player, dir, &collision);
+		updateScreen(player, dir, &collision, fruit_loc, &fruit_bool, &score);
 		//TODO consider changing SPEED depending on if moving horizontally or vertically
 		refresh();
 		usleep(SPEED);
@@ -141,7 +146,7 @@ void updateScore(int which, int score){
 	return;
 }
 
-void updateScreen(SNAKE *sp, int dir, bool *collision){
+void updateScreen(SNAKE *sp, int dir, bool *collision, int *fruit_loc, bool *fruit, int *score){
 	char eyes;
 
 	//switch case to decide "eyes" char
@@ -162,11 +167,20 @@ void updateScreen(SNAKE *sp, int dir, bool *collision){
 	attron(A_REVERSE);
 	mvaddch(getSnakeTaily(sp), getSnakeTailx(sp), ' ');
 	//update the snake position
-	updateSnake(sp, dir, getmaxx(stdscr), getmaxy(stdscr), collision);
+	updateSnake(sp, dir, getmaxx(stdscr), getmaxy(stdscr), collision, fruit_loc, fruit, score);
 	//turn on front
 	mvaddch(getSnakeTaily(sp), getSnakeTailx(sp), eyes);
 	attroff(A_REVERSE);
 
+	//TODO add logic to prevent fruit from spawning inside snake
+	//draw a new fruit, if necessary (do not draw it over scoreboard)
+	if(!(*fruit)){
+		*fruit_loc = rand() % getmaxx(stdscr);
+		*(fruit_loc+1) = rand() % (getmaxy(stdscr)-2) + 2;
+		mvaddch(*(fruit_loc+1), *fruit_loc, '@');
+		*fruit = true;
+	}
+
 	return;
 }
 
diff --git a/include/body.h b/include/body.h
index a1957bc..29241bf 100644
--- a/include/body.h
+++ b/include/body.h
@@ -8,7 +8,7 @@ typedef struct snake SNAKE;
 SNAKE *makeSnake(int startx, int starty, int len);
 void deleteSnake(SNAKE *sp);
 
-void updateSnake(SNAKE *sp, int dir, int maxx, int maxy, bool *collision);
+void updateSnake(SNAKE *sp, int dir, int maxx, int maxy, bool *collision, int *fruit_loc, bool *fruit, int *score);
 bool checkSnake(SNAKE *sp, int maxx, int maxy);
 
 int getSnakeTailx(SNAKE *sp);
-- 
cgit