freelist

source/engine/freelist.h

@@ -0,0 +1,60 @@
+#ifndef FREELIST_H
+#define FREELIST_H
+
+/* Given a pointer to a struct, create a free list
+   Struct must have a 'next' field
+*/
+
+struct freelistheader
+{
+  unsigned int first;
+  unsigned int len;
+};
+
+#define freelist_header(p) ((struct freelistheader*)p-1)
+static inline void *freelist_make(struct freelistheader *list, size_t elemsize, unsigned int n)
+{
+  list = malloc(elemsize*n*sizeof(struct freelistheader));
+  list->first = 0;
+  list->len = n;
+  return list+1;
+}
+
+static inline unsigned int freelist_check(struct freelistheader *h, void *data, size_t elemsize)
+{
+  if (h->first > h->len) return -1;
+  unsigned int id = h->first;
+  return id;
+}
+
+#define freelist_size(p,l) do{p = freelist_make(p,sizeof(*p),l); for(int i = 0; i < l; i++) { p[i].next = i+1; }}while(0)
+#define freelist_len(p) (freelist_header(p)->len)
+#define freelist_first(p) (freelist_header(p)->first)
+#define freelist_grab(i,p) do{i=freelist_header(p)->first; freelist_header(p)->first = p[i].next; p[i].next = -1;}while(0)
+#define freelist_kill(p,i) do{p[i].next = freelist_first(p);freelist_first(p)=i;}while(0)
+#define freelist_free(p) (free(freelist_header(p)))
+
+struct link_header
+{
+  int len;
+  void *head;
+  void *last;
+};
+
+static inline void *add_link(struct link_header *h, size_t size)
+{
+  void *n = malloc(size);
+  return n;
+}
+#define link_header(p) ((struct link_header*)p-1)
+#define link_head(p) (link_header(p)->head)
+#define link_last(p) (link_header(p)->last)
+#define link_add(p,v) do{
+#define link_each(p,fn) do {void *f = p; while (link_header(p)->head != NULL) { fn(p); p = p->next; }; p = f; }while(0)
+#define link_e(p,i) (
+
+#define stack_size(p,n) (p = malloc(sizeof(p)*n))
+#define stack_push(p,v) ()
+#define stack_pop(p) ()
+
+#endif

source/engine/particle.c

@@ -1,20 +1,10 @@
 #include "particle.h"
 #include "stb_ds.h"
+#include "freelist.h"
 
 struct emitter make_emitter() {
   struct emitter e = {0};
-  return e;
-}
-
-struct emitter set_emitter(struct emitter e) {
-  arrsetlen(e.particles, e.max);
-
-  e.first = &e.particles[0];
-
-  for (int i = 0; i < arrlen(e.particles) - 1; i++) {
-    e.particles[i].next = &e.particles[i + 1];
-  }
-
+  arrsetcap(e.particles, 200);
   return e;
 }
 
@@ -23,26 +13,24 @@ void free_emitter(struct emitter e) {
 }
 
 void start_emitter(struct emitter e) {
+ 
 }
 
 void pause_emitter(struct emitter e) {
+
 }
 
 void stop_emitter(struct emitter e) {
+
 }
 
 void emitter_step(struct emitter e, double dt) {
   for (int i = 0; i < arrlen(e.particles); i++) {
-    if (e.particles[i].life <= 0)
-      continue;
+  e.particles[i].pos = HMM_AddV3(e.particles[i].pos, HMM_MulV3F(e.particles[i].v, dt));
+  e.particles[i].angle = HMM_MulQ(e.particles[i].angle, HMM_MulQF(e.particles[i].angle, dt));
+  e.particles[i].life -= dt;
 
-    e.particles[i].pos = cpvadd(e.particles[i].pos, cpvmult(e.particles[i].v, dt));
-    e.particles[i].angle += e.particles[i].av * dt;
-    e.particles[i].life -= dt;
-
-    if (e.particles[i].life <= 0) {
-      e.particles[i].next = e.first;
-      e.first = &e.particles[i];
-    }
+  if (e.particles[i].life <= 0)
+    arrdelswap(e.particles, i);
   }
 }

source/engine/particle.h

@@ -1,27 +1,25 @@
 #ifndef PARTICLE_H
 #define PARTICLE_H
 
-#include <chipmunk/chipmunk.h>
+#include "HandmadeMath.h"
 
 struct particle {
-    cpVect pos;
-    cpVect v; /* velocity */
-    double angle;
-    double av; /* angular velocity */
+  HMM_Vec3 pos;
+  HMM_Vec3 v; /* velocity */
+  HMM_Quat angle;
+  HMM_Quat av; /* angular velocity */
 
-
-    union {
-        double life;
-        struct particle *next;
-    };
+  union {
+    double life;
+    unsigned int next;
+  };
 };
 
 struct emitter {
-    struct particle *particles;
-    struct particle *first;
-    int max;
-    double life;
-    void (*seeder)(struct particle *p); /* Called to initialize each particle */
+  struct particle *particles;
+  int max;
+  double life;
+  void (*seeder)(struct particle *p); /* Called to initialize each particle */
 };
 
 struct emitter make_emitter();
@@ -33,4 +31,4 @@ void stop_emitter(struct emitter e);
 
 void emitter_step(struct emitter e, double dt);
 
-#endif
+#endif

source/engine/sprite.c

@@ -13,14 +13,14 @@
 #include <ctype.h>
 #include <limits.h>
 #include "HandmadeMath.h"
+#include "freelist.h"
 
 #include "sprite.sglsl.h"
 #include "9slice.sglsl.h"
 
 struct TextureOptions TEX_SPRITE = {1, 0, 0};
 
-static struct sprite *sprites;
-static int first = -1;
+static struct sprite *sprites = NULL;
 
 static sg_shader shader_sprite;
 static sg_pipeline pip_sprite;
@@ -59,29 +59,21 @@ int make_sprite(int go) {
       .size = {1.f, 1.f},
       .tex = texture_loadfromfile(NULL),
       .go = go,
-      .next = -1,
       .layer = 0,
+      .next = -1,
       .enabled = 1};
 
-  int slot = 0;
-  if (first < 0) {
-    arrput(sprites, sprite);
-    slot = arrlen(sprites)-1;
-  } else {
-    slot = first;
-    first = id2sprite(first)->next;
-    *id2sprite(slot) = sprite;
-  }
-
-  return slot;
+  int id;
+  freelist_grab(id, sprites);
+  sprites[id] = sprite;
+  return id;
 }
 
 void sprite_delete(int id) {
   struct sprite *sp = id2sprite(id);
   sp->go = -1;
   sp->enabled = 0;
-  sp->next = first;
-  first = id;
+  freelist_kill(sprites,id);
 }
 
 void sprite_enabled(int id, int e) {
@@ -132,8 +124,9 @@ void sprite_draw_all() {
   static int *layers;
   if (layers) arrfree(layers);
 
-  for (int i = 0; i < arrlen(sprites); i++)
-    if (sprites[i].go >= 0 && sprites[i].enabled) arrpush(layers, i);
+  for (int i = 0; i < freelist_len(sprites); i++)
+    if (sprites[i].next == -1 && sprites[i].go >= 0 && sprites[i].enabled)
+      arrpush(layers, i);
 
   if (arrlen(layers) == 0) return;
   if (arrlen(layers) > 1)
@@ -144,6 +137,10 @@ void sprite_draw_all() {
 }
 
 void sprite_loadtex(struct sprite *sprite, const char *path, struct glrect frame) {
+  if (!sprite) {
+    YughWarn("NO SPRITE!");
+    return;
+  }
   sprite->tex = texture_loadfromfile(path);
   sprite_setframe(sprite, &frame);
 }
@@ -154,6 +151,8 @@ void sprite_settex(struct sprite *sprite, struct Texture *tex) {
 }
 
 void sprite_initialize() {
+  freelist_size(sprites, 500);
+  
   shader_sprite = sg_make_shader(sprite_shader_desc(sg_query_backend()));
 
   pip_sprite = sg_make_pipeline(&(sg_pipeline_desc){