Particles now work with ssbos

source/engine/jsffi.c

@@ -608,6 +608,11 @@ sg_bindings js2bind(JSValue v)
     bind.fs.samplers[i] = std_sampler; 
   }
   
+  JSValue ssbo = js_getpropstr(v, "ssbo");
+  for (int i = 0; i < js_arrlen(ssbo); i++) {
+    bind.vs.storage_buffers[i] = *js2sg_buffer(js_getpropidx(ssbo,i));
+  }
+  
   return bind;
 }
 
@@ -630,7 +635,10 @@ JSC_GETSET(emitter, persist_var, number)
 JSC_GETSET(emitter, warp_mask, bitmask)
 JSC_CCALL(emitter_emit, emitter_emit(js2emitter(this), js2number(argv[0]), js2transform2d(argv[1])))
 JSC_CCALL(emitter_step, emitter_step(js2emitter(this), js2number(argv[0]), js2transform2d(argv[1])))
-JSC_CCALL(emitter_draw, emitter_draw(js2emitter(this), js2bind(argv[0])))
+JSC_CCALL(emitter_draw,
+  emitter_draw(js2emitter(this));
+  return number2js(arrlen(js2emitter(this)->verts));
+)
 
 JSC_CCALL(render_flushtext, text_flush())
 
@@ -742,6 +750,13 @@ sg_shader js2shader(JSValue v)
     desc.fs.image_sampler_pairs[0].sampler_slot = 0;
   }
   
+  JSValue ssbos = js_getpropstr(vs, "storage_buffers");
+  unin = js_arrlen(ssbos);
+  for (int i = 0; i < unin; i++) {
+    desc.vs.storage_buffers[i].used = true;
+    desc.vs.storage_buffers[i].readonly = true;
+  }
+  
   sg_shader sh = sg_make_shader(&desc);
   
   jsfreestr(vsf);
@@ -841,7 +856,8 @@ JSC_CCALL(render_spdraw,
   sg_bindings bind = js2bind(argv[0]);
   sg_apply_bindings(&bind);
   int p = js2number(js_getpropstr(argv[0], "count"));
-  sg_draw(0,p,1);
+  int n = js2number(js_getpropstr(argv[0], "inst"));
+  sg_draw(0,p,n);
 )
 
 JSC_CCALL(render_setpipeline,
@@ -1812,7 +1828,11 @@ JSC_CCALL(os_make_transform2d,
 
 JSC_SCALL(os_system, return number2js(system(str)); )
 JSC_SCALL(os_make_model, ret = model2js(model_make(str)))
-JSC_CCALL(os_make_emitter, ret = emitter2js(make_emitter()))
+JSC_CCALL(os_make_emitter,
+  emitter *e = make_emitter();
+  ret = emitter2js(e);
+  js_setpropstr(ret, "buffer", sg_buffer2js(&e->buffer));
+)
 
 JSC_CCALL(os_make_buffer,
   int type = js2number(argv[1]);

source/engine/particle.c

@@ -19,7 +19,7 @@ emitter *make_emitter() {
   e->speed = 20;
   e->buffer = sg_make_buffer(&(sg_buffer_desc){
     .size = sizeof(struct par_vert),
-    .type = SG_BUFFERTYPE_VERTEXBUFFER,
+    .type = SG_BUFFERTYPE_STORAGEBUFFER,
     .usage = SG_USAGE_STREAM
   });
   return e;
@@ -41,13 +41,14 @@ float variate(float val, float variance)
 
 int emitter_spawn(emitter *e, transform2d *t)
 {
-  particle p;
+  if (arrlen(e->particles) == e->max) return 0;
+  particle p = {0};
   p.life = e->life;
   p.pos = (HMM_Vec4){t->pos.x,t->pos.y,0,0};
-  float newan = t->angle * HMM_TurnToRad*(frand(e->divergence)-(e->divergence/2));
+  float newan = t->angle + (frand(e->divergence)-(e->divergence/2))*HMM_TurnToRad;
   HMM_Vec2 norm = HMM_V2Rotate((HMM_Vec2){0,1}, newan);
   p.v = HMM_MulV4F((HMM_Vec4){norm.x,norm.y,0,0}, variate(e->speed, e->variation));
-  p.angle = newan;
+  p.angle = 0.25;
   p.scale = variate(e->scale*t->scale.x, e->scale_var);
   arrput(e->particles,p);
   return 1;
@@ -59,7 +60,7 @@ void emitter_emit(emitter *e, int count, transform2d *t)
     emitter_spawn(e, t);
 }
 
-void emitter_draw(emitter *e, sg_bindings bind)
+void emitter_draw(emitter *e)
 {
   if (arrlen(e->particles) == 0) return;
   arrsetlen(e->verts, arrlen(e->particles));
@@ -73,27 +74,26 @@ void emitter_draw(emitter *e, sg_bindings bind)
       e->verts[i].scale = lerp(p->time/e->grow_for, 0, p->scale);
     else if (p->time > (p->life - e->shrink_for))
       e->verts[i].scale = lerp((p->time-(p->life-e->shrink_for))/e->shrink_for, p->scale, 0);*/
-    e->verts[i].color = vec2rgba(p->color);
+    e->verts[i].color = p->color;
   }
 
   sg_range verts;
   verts.ptr = e->verts;
   verts.size = sizeof(*e->verts)*arrlen(e->verts);
-  if (sg_query_buffer_will_overflow(e->buffer, verts.size))
+  if (sg_query_buffer_will_overflow(e->buffer, verts.size)) {
+    sg_destroy_buffer(e->buffer);
     e->buffer = sg_make_buffer(&(sg_buffer_desc){
       .size = verts.size,
-      .type = SG_BUFFERTYPE_VERTEXBUFFER,
+      .type = SG_BUFFERTYPE_STORAGEBUFFER,
       .usage = SG_USAGE_STREAM
     });
+  }
     
   sg_append_buffer(e->buffer, &verts);
-  
-  bind.vertex_buffers[0] = e->buffer;
-  sg_apply_bindings(&bind);
-  sg_draw(0,4,arrlen(e->verts));
 }
 
 void emitter_step(emitter *e, double dt, transform2d *t) {
+  
   HMM_Vec4 g_accel = HMM_MulV4F((HMM_Vec4){cpSpaceGetGravity(space).x, cpSpaceGetGravity(space).y, 0, 0}, dt);
   
   for (int i = 0; i < arrlen(e->particles); i++) {
@@ -110,13 +110,14 @@ void emitter_step(emitter *e, double dt, transform2d *t) {
   
    if (e->particles[i].time >= e->particles[i].life)
      arrdelswap(e->particles, i);
-   else if (query_point(e->particles[i].pos.xy))
-     arrdelswap(e->particles,i);
+//   else if (query_point(e->particles[i].pos.xy))
+//     arrdelswap(e->particles,i);
   }
 
   e->tte-=dt;
-  if (e->tte <= 0) {
-    emitter_spawn(e, t);
-    e->tte = lerp(e->explosiveness, e->life/e->max,0);
+  float step = lerp(e->explosiveness, e->life/e->max,0);
+  while (e->tte <= 0) {
+    e->tte += step;
+    if (!emitter_spawn(e, t)) break;
   }
 }

source/engine/particle.h

@@ -28,7 +28,7 @@ typedef struct par_vert {
   HMM_Vec2 pos;
   float angle;
   float scale;
-  struct rgba color;
+  HMM_Vec4 color;
 } par_vert;
 
 typedef struct emitter {
@@ -70,6 +70,6 @@ void emitter_free(emitter *e);
 
 void emitter_emit(emitter *e, int count, transform2d *t);
 void emitter_step(emitter *e, double dt, transform2d *t);
-void emitter_draw(emitter *e, sg_bindings bind);
+void emitter_draw(emitter *e);
 
 #endif