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add display border collision detection, fix malloc bug, add some apples

This commit is contained in:
randomuser 2021-10-18 20:03:02 -05:00
parent 201e606e33
commit 78fc5a3a0e
1 changed files with 29 additions and 4 deletions
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33
c/anaconda.c
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@ -49,8 +49,16 @@ int intersect(point *a, point *b, point *c, point *d) {
return (ccw(a, c, d) != ccw(b, c, d)) && (ccw(a, b, c) != ccw(a, b, d));
}
int randrange(int b, int s) {
return rand() % (b - s + 1) + s;
}
int eucliddist(point *a, point *b) {
return sqrt(pow(a->x - b->x, 2) + pow(a->y - b->y, 2));
}
point *mkPoint(double x, double y) {
point *ret = malloc(sizeof ret);
point *ret = malloc(sizeof *ret);
ret->x = x;
ret->y = y;
@ -73,7 +81,7 @@ void appendPoint(point *dest, point *origin) {
dest->next = origin;
}
int updateAnaconda(anaconda *anaconda) {
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(
@ -108,6 +116,18 @@ int updateAnaconda(anaconda *anaconda) {
if(intersect(top, top->next, ptr, ptr->next)) return 0;
ptr = ptr->next;
}
if(
new->x >= w || new->x <= 0 ||
new->y >= h || new->y <= 0
) return 0;
if(eucliddist(new, apple) <= 30) {
anaconda->score += 30;
apple->x = randrange(20, w);
apple->y = randrange(20, h);
}
return 1;
}
@ -127,7 +147,7 @@ point *generateChain(int length) {
}
anaconda *mkAnaconda(point *point, double rot) {
anaconda *ret = malloc(sizeof ret);
anaconda *ret = malloc(sizeof *ret);
ret->chain = point;
ret->rot = rot;
@ -139,8 +159,12 @@ anaconda *mkAnaconda(point *point, double rot) {
int main(void) {
anaconda *anaconda = mkAnaconda(generateChain(30), 0);
xinit();
int width = DisplayWidth(d, s);
int height = DisplayHeight(d, s);
point *apple = mkPoint(randrange(20, width), randrange(20, height));
srand(time(0));
while(1) {
if(!updateAnaconda(anaconda)) {
if(!updateAnaconda(anaconda, width, height, apple)) {
return 0;
}
XClearWindow(d, w);
@ -149,6 +173,7 @@ int main(void) {
XDrawLine(d, w, gc, ptr->x, ptr->y, ptr->next->x, ptr->next->y);
ptr = ptr->next;
}
XDrawArc(d, w, gc, apple->x - (5/2), apple->y - (5/2), 5, 5, 0, 360*64);
while(XPending(d)) {
XNextEvent(d, &e);
switch(e.type) {