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clean up updateAnaconda()

This commit is contained in:
randomuser 2021-10-18 20:23:36 -05:00
parent 7f7a694486
commit c1434abc40
1 changed files with 15 additions and 16 deletions
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31
c/anaconda.c
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@ -82,13 +82,14 @@ void appendPoint(point *dest, point *origin) {
}
int updateAnaconda(anaconda *anaconda, int w, int h, point *apple) {
point *prev = anaconda->chain;
point *temp = rotate(mkPoint(10, 0), anaconda->rot);
point *new = mkPoint(
prev->x + temp->x,
prev->y + temp->y
point *temp, *new, *ptr;
new = anaconda->chain;
temp = rotate(mkPoint(10, 0), anaconda->rot);
new = mkPoint(
new->x + temp->x,
new->y + temp->y
);
new->next = prev;
new->next = anaconda->chain;
anaconda->chain = new;
free(temp);
@ -98,28 +99,26 @@ int updateAnaconda(anaconda *anaconda, int w, int h, point *apple) {
apple->x = randrange(20, w / 2);
apple->y = randrange(20, h / 2);
} else {
point *traverser = new;
ptr = new;
while(1) {
if(traverser->next) {
if(traverser->next->next) {
traverser = traverser->next;
} else break;
if(ptr->next) {
if(ptr->next->next) ptr = ptr->next;
else break;
} else break;
}
free(traverser->next);
traverser->next = NULL;
free(ptr->next);
ptr->next = NULL;
}
point *top = anaconda->chain;
point *ptr = top;
ptr = anaconda->chain;
for(int i = 0; i < 3; i++) {
if(ptr->next) ptr = ptr->next;
else return 1; /* we're fine, the snake is too short to intersect itself */
}
while(ptr->next) {
if(intersect(top, top->next, ptr, ptr->next)) return 0;
if(intersect(new, new->next, ptr, ptr->next)) return 0;
ptr = ptr->next;
}