#include "mt.h"
#include "rocks.h"
-struct rock rocks[MAXROCKS], *free_rocks;
+struct rock rocks[MAXROCKS];
+Sprite *free_rocks;
-struct rock **rock_buckets[2];
+Sprite **rock_buckets[2];
int n_buckets;
// we have two sets of buckets -- this variable tells which we are using.
int p;
#define RDX 2.5 // range for rock dx values (+/-)
#define RDY 2.5 // range for rock dy values (+/-)
-static inline struct rock **
+static inline Sprite **
bucket(int x, int y, int p)
{
int b = (x+grid_size)/grid_size + bw*((y+grid_size)/grid_size);
p = 0;
}
-void
-transfer_rock(struct rock *r, struct rock **from, struct rock **to)
+static inline void
+insert_sprite(Sprite **head, Sprite *this)
+{
+ this->next = *head;
+ *head = this;
+}
+
+static inline Sprite *
+remove_sprite(Sprite **head)
{
- *from = r->next;
- r->next = *to;
- *to = r;
+ Sprite *this = *head;
+ *head = this->next;
+ return this;
}
void
rocks[0].next = NULL;
for(i=1; i<MAXROCKS; i++) rocks[i].next = &rocks[i-1];
- free_rocks = &rocks[MAXROCKS-1];
+ free_rocks = SPRITE(&rocks[MAXROCKS-1]);
for(i = 0; i<n_buckets; i++) {
rock_buckets[0][i] = NULL;
for(i = 0; i<NROCKS; i++) {
snprintf(a, ROCK_LEN, "sprites/rock%02d.png", i);
load_sprite(SPRITE(&prototypes[i]), a);
+ prototypes[i].type = ROCK_SPRITE;
maxw = max(maxw, prototypes[i].w);
maxh = max(maxh, prototypes[i].h);
}
new_rocks(void)
{
int i, type;
- struct rock *r, **tmp;
+ struct rock *r;
float ti[4];
float rmin[4];
float rmax[4];
while(rtimers[i] >= 1) {
rtimers[i] -= 1;
if(!free_rocks) return; // sorry, we ran out of rocks!
- r = free_rocks; free_rocks = r->next;
+ r = (struct rock *) remove_sprite(&free_rocks);
type = urnd() % NROCKS;
*r = prototypes[type];
r->type = type;
r->dy = weighted_rnd_range(rmin[i], rmax[i]) + screendy;
break;
}
- tmp = bucket(r->x, r->y, p);
- r->next = *tmp; *tmp = r;
+ insert_sprite(bucket(r->x, r->y, p), SPRITE(r));
}
}
}
move_rocks(void)
{
int b;
- struct rock **head;
- struct rock *r;
+ Sprite *r, **head;
// Move all the rocks
for(b=0; b<n_buckets; b++) {
// (either way we move it out of this list).
if(r->x + r->image->w < 0 || r->x >= XSIZE
|| r->y + r->image->h < 0 || r->y >= YSIZE) {
- transfer_rock(r, head, &free_rocks);
+ insert_sprite(&free_rocks, remove_sprite(head));
r->image = NULL;
- } else transfer_rock(r, head, bucket(r->x, r->y, 1-p));
+ } else insert_sprite(bucket(r->x, r->y, 1-p), remove_sprite(head));
}
}
p = 1-p; // switch current set of buckets.
}
int
-hit_in_bucket(struct rock *r, Sprite *s)
+hit_in_bucket(Sprite *r, Sprite *s)
{
for(; r; r=r->next) {
- if(collide(SPRITE(r), s)) return true;
+ if(collide(r, s)) return true;
}
return false;
}
hit_rocks(Sprite *s)
{
int l, r, t, b;
- struct rock **bucket;
+ Sprite **bucket;
l = (s->x + grid_size) / grid_size;
r = (s->x + s->w + grid_size) / grid_size;
}
int
-pixel_hit_in_bucket(struct rock *r, float x, float y)
+pixel_hit_in_bucket(Sprite *r, float x, float y)
{
for(; r; r=r->next) {
- if(pixel_collide(SPRITE(r), x, y)) return 1;
+ if(pixel_collide(r, x, y)) return 1;
}
return 0;
}
{
int ix, iy;
int l, t;
- struct rock **bucket;
+ Sprite **bucket;
ix = x + grid_size; iy = y + grid_size;
l = ix / grid_size; t = iy / grid_size;
blast_rocks(float x, float y, float radius, int onlyslow)
{
int b;
- struct rock *r;
+ Sprite *r;
float dx, dy, n;
if(onlyslow) return;