#include "globals.h"
#include "mt.h"
#include "rocks.h"
-#include "shape.h"
-SDL_Surface *load_image(char *filename);
+struct rock rocks[MAXROCKS];
+Sprite *free_rocks;
-struct rock_struct {
- struct rock_struct *next;
- float x,y,dx,dy;
- SDL_Surface *image;
- struct shape *shape;
- int type_number;
-};
-
-struct rock_struct rocks[MAXROCKS], *free_rocks;
-
-struct rock_struct **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;
int bw, bh;
int grid_size;
-SDL_Surface *surf_rock[NROCKS];
-struct shape rock_shapes[NROCKS];
+static struct rock prototypes[NROCKS];
// timers for rock generation.
-float rtimers[4];
+static float rtimers[4];
uint32_t nrocks;
float nrocks_timer;
#define RDX 2.5 // range for rock dx values (+/-)
#define RDY 2.5 // range for rock dy values (+/-)
-static inline struct rock_struct **
+static inline Sprite **
bucket(int x, int y, int p)
{
- int b = (1+x/grid_size) + bw*(1+y/grid_size);
+ int b = (x+grid_size)/grid_size + bw*((y+grid_size)/grid_size);
return &rock_buckets[p][b];
}
bh = 1 + scr_grid_h + 1;
n_buckets = bw * bh;
- rock_buckets[0] = malloc(n_buckets * sizeof(struct rock_struct *));
- rock_buckets[1] = malloc(n_buckets * sizeof(struct rock_struct *));
+ rock_buckets[0] = malloc(n_buckets * sizeof(struct rock *));
+ rock_buckets[1] = malloc(n_buckets * sizeof(struct rock *));
if(!rock_buckets[0] || !rock_buckets[1]) {
fprintf(stderr, "Can't allocate rock buckets.\n");
exit(1);
p = 0;
}
-void
-transfer_rock(struct rock_struct *r, struct rock_struct **from, struct rock_struct **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
int i;
for(i=0; i<MAXROCKS; i++) rocks[i].image = NULL;
- rocks[0].next = NULL; free_rocks = &rocks[MAXROCKS-1];
- for(i = 1; i<MAXROCKS; i++) rocks[i].next = &rocks[i-1];
+
+ rocks[0].next = NULL;
+ for(i=1; i<MAXROCKS; i++) rocks[i].next = &rocks[i-1];
+ free_rocks = SPRITE(&rocks[MAXROCKS-1]);
+
for(i = 0; i<n_buckets; i++) {
rock_buckets[0][i] = NULL;
rock_buckets[1][i] = NULL;
for(i = 0; i<NROCKS; i++) {
snprintf(a, ROCK_LEN, "sprites/rock%02d.png", i);
- NULLERROR(surf_rock[i] = load_image(a));
- get_shape(surf_rock[i], &rock_shapes[i]);
- maxw = max(maxw, rock_shapes[i].w);
- maxh = max(maxh, rock_shapes[i].h);
+ load_sprite(SPRITE(&prototypes[i]), a);
+ prototypes[i].type = ROCK_SPRITE;
+ maxw = max(maxw, prototypes[i].w);
+ maxh = max(maxh, prototypes[i].h);
}
grid_size = max(maxw, maxh) * 3 / 2;
init_buckets();
void
new_rocks(void)
{
- int i;
- struct rock_struct *r;
+ int i, type;
+ 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;
- r->type_number = urnd() % NROCKS;
- r->image = surf_rock[r->type_number];
- r->shape = &rock_shapes[r->type_number];
+ r = (struct rock *) remove_sprite(&free_rocks);
+ type = urnd() % NROCKS;
+ *r = prototypes[type];
+ r->type = type;
switch(i) {
case RIGHT:
r->x = XSIZE;
r->dy = weighted_rnd_range(rmin[i], rmax[i]) + screendy;
break;
}
- transfer_rock(r, &free_rocks, bucket(r->x, r->y, p));
+ insert_sprite(bucket(r->x, r->y, p), SPRITE(r));
}
}
}
move_rocks(void)
{
int b;
- struct rock_struct **head;
- struct rock_struct *r;
+ Sprite *r, **head;
// Move all the rocks
for(b=0; b<n_buckets; b++) {
r->x += (r->dx - screendx)*t_frame;
r->y += (r->dy - screendy)*t_frame;
- // clip or resort into other bucket set
+ // clip it, or sort it into the other bucket set
// (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_struct *r, float x, float y, struct shape *shape)
+hit_in_bucket(Sprite *r, Sprite *s)
{
for(; r; r=r->next) {
- if(collide(x - r->x, y - r->y, r->shape, shape)) return 1;
+ if(collide(r, s)) return true;
}
- return 0;
+ return false;
}
int
-hit_rocks(float x, float y, struct shape *shape)
+hit_rocks(Sprite *s)
{
- struct rock_struct **b = bucket(x, y, p);
- int bdx = ((int)x+shape->w)/grid_size - (int)x/grid_size;
- int bdy = ((int)y+shape->h)/grid_size - (int)y/grid_size;
- if(hit_in_bucket(*b, x, y, shape)) return 1;
- if(hit_in_bucket(*(b-1), x, y, shape)) return 1;
- if(hit_in_bucket(*(b-bw), x, y, shape)) return 1;
- if(hit_in_bucket(*(b-bw-1), x, y, shape)) return 1;
-
- if(bdx) {
- if(hit_in_bucket(*(b+1), x, y, shape)) return 1;
- if(hit_in_bucket(*(b+1-bw), x, y, shape)) return 1;
+ int l, r, t, b;
+ Sprite **bucket;
+
+ l = (s->x + grid_size) / grid_size;
+ r = (s->x + s->w + grid_size) / grid_size;
+ t = (s->y + grid_size) / grid_size;
+ b = (s->y + s->h + grid_size) / grid_size;
+ bucket = &rock_buckets[p][l + t*bw];
+
+ if(hit_in_bucket(*bucket, s)) return true;
+ if(l > 0 && hit_in_bucket(*(bucket-1), s)) return true;
+ if(t > 0 && hit_in_bucket(*(bucket-bw), s)) return true;
+ if(l > 0 && t > 0 && hit_in_bucket(*(bucket-1-bw), s)) return true;
+
+ if(r > l) {
+ if(hit_in_bucket(*(bucket+1), s)) return true;
+ if(t > 0 && hit_in_bucket(*(bucket+1-bw), s)) return true;
}
- if(bdy) {
- if(hit_in_bucket(*(b+bw), x, y, shape)) return 1;
- if(hit_in_bucket(*(b+bw-1), x, y, shape)) return 1;
+ if(b > t) {
+ if(hit_in_bucket(*(bucket+bw), s)) return true;
+ if(l > 0 && hit_in_bucket(*(bucket-1+bw), s)) return true;
}
- if(bdx && bdy && hit_in_bucket(*(b+bw+1), x, y, shape)) return 1;
- return 0;
+ if(r > l && b > t && hit_in_bucket(*(bucket+1+bw), s)) return true;
+ return false;
}
int
-pixel_hit_in_bucket(struct rock_struct *r, float x, float y)
+pixel_hit_in_bucket(Sprite *r, float x, float y)
{
for(; r; r=r->next) {
- if(x < r->x || y < r->y) continue;
- if(pixel_collide(x - r->x, y - r->y, r->shape)) return 1;
+ if(pixel_collide(r, x, y)) return 1;
}
return 0;
}
int
pixel_hit_rocks(float x, float y)
{
- struct rock_struct **b = bucket(x, y, p);
- if(pixel_hit_in_bucket(*b, x, y)) return 1;
- if(pixel_hit_in_bucket(*(b-1), x, y)) return 1;
- if(pixel_hit_in_bucket(*(b-bw), x, y)) return 1;
- if(pixel_hit_in_bucket(*(b-bw-1), x, y)) return 1;
- return 0;
+ int ix, iy;
+ int l, t;
+ Sprite **bucket;
+
+ ix = x + grid_size; iy = y + grid_size;
+ l = ix / grid_size; t = iy / grid_size;
+ bucket = &rock_buckets[p][l + t*bw];
+ if(pixel_hit_in_bucket(*bucket, x, y)) return true;
+ if(l > 0 && pixel_hit_in_bucket(*(bucket-1), x, y)) return true;
+ if(t > 0 && pixel_hit_in_bucket(*(bucket-bw), x, y)) return true;
+ if(l > 0 && t > 0 && pixel_hit_in_bucket(*(bucket-1-bw), x, y)) return true;
+ return false;
}
void
blast_rocks(float x, float y, float radius, int onlyslow)
{
int b;
- struct rock_struct *r;
+ Sprite *r;
float dx, dy, n;
if(onlyslow) return;
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