prosperon/source/engine/ffi.c

#include "ffi.h"

#include "script.h"

#include "string.h"
#include "window.h"
#include "editor.h"
#include "engine.h"
#include "log.h"
#include "input.h"
#include "gameobject.h"
#include "openglrender.h"
#include "2dphysics.h"
#include "sprite.h"
#include "anim.h"
#include "yugine.h"
#include "nuke.h"
#include "sound.h"
#include "font.h"
#include "sound.h"
#include "music.h"
#include "level.h"
#include "tinyspline.h"
#include "mix.h"
#include "debugdraw.h"
#include "stb_ds.h"
#include <ftw.h>

#define BYTE_TO_BINARY_PATTERN "%c%c%c%c%c%c%c%c"
#define BYTE_TO_BINARY(byte) \
        (byte & 0x80 ? '1' : '0'), \
        (byte & 0x40 ? '1' : '0'), \
	(byte & 0x20 ? '1' : '0'), \
        (byte & 0x10 ? '1' : '0'), \
        (byte & 0x08 ? '1' : '0'), \
        (byte & 0x04 ? '1' : '0'), \
        (byte & 0x02 ? '1' : '0'), \
        (byte & 0x01 ? '1' : '0')

struct gameobject *duk2go(duk_context *duk, int p)
{
  return id2go(duk_to_int(duk, p));
}

struct color duk2color(duk_context *duk, int p)
{
    struct color color;

    duk_get_prop_index(duk, p, 0);
    color.r = duk_to_number(duk, -1);
    duk_get_prop_index(duk, p, 0);
    color.b = duk_to_number(duk, -1);
    duk_get_prop_index(duk, p, 0);
    color.g = duk_to_number(duk, -1);

    return color;
}

cpVect duk2vec2(duk_context *duk, int p)
{
    cpVect pos;

    if (p < 0) p = duk_get_top_index(duk) + p + 1;

    duk_get_prop_index(duk, p, 0);
    pos.x = duk_to_number(duk, -1);
    duk_pop(duk);

    duk_get_prop_index(duk, p, 1);
    pos.y = duk_to_number(duk, -1);

    duk_pop(duk);

    return pos;
}

cpBitmask duk2bitmask(duk_context *duk, int p)
{
    cpBitmask mask = 0;

    if (p < 0) p = duk_get_top_index(duk)+p+1;

    int len = duk_get_length(duk, p);

    for (int i = 0; i < len; i++) {
      duk_get_prop_index(duk, p, i);
      int val = duk_to_int(duk, -1);
      duk_pop(duk);

      if (val > 10) continue;
      
      mask |= 1<<val;
    }

    YughInfo(BYTE_TO_BINARY_PATTERN,BYTE_TO_BINARY(mask));

    return mask;
}

cpVect *duk2cpvec2arr(duk_context *duk, int p)
{
  int n = duk_get_length(duk, p);
  cpVect *points = NULL;

  for (int i = 0; i < n; i++) {
      duk_get_prop_index(duk, p, i);

      arrput(points, duk2vec2(duk, -1));
  }

  return points;
}

void bitmask2duk(duk_context *duk, cpBitmask mask)
{
  int arr = duk_push_array(duk);
  int arridx = 0;
  for (int i = 0; i < 11; i++) {
    int on = mask & 1<<i;
    if (on) {
      duk_push_int(duk, i);
      duk_put_prop_index(duk, arr, arridx++);
    }
  }
}

void vec2float(cpVect v, float *f)
{
    f[0] = v.x;
    f[1] = v.y;
}


duk_idx_t vect2duk(cpVect v) {
    duk_idx_t arr = duk_push_array(duk);
    duk_push_number(duk, v.x);
    duk_put_prop_index(duk, arr, 0);
    duk_push_number(duk, v.y);
    duk_put_prop_index(duk, arr, 1);

    return arr;
}

void duk_dump_stack(duk_context *duk)
{
    YughInfo("DUK CALLSTACK");
    for (int i = -2; ; i--) { /* Start at -2 to skip the invoked C function */
      duk_inspect_callstack_entry(duk, i);
      if (duk_is_undefined(duk, -1)) break;

      duk_get_prop_string(duk, -1, "lineNumber");
      long ln = duk_to_int(duk, -1);
      duk_pop(duk);

      duk_get_prop_string(duk, -1, "function");
      duk_get_prop_string(duk, -1, "name");
      const char *fn = duk_to_string(duk, -1);
      duk_pop(duk);

      duk_get_prop_string(duk, -1, "fileName");
      const char *file = duk_to_string(duk, -1);
      duk_pop(duk);
      
      mYughLog(1, 3, ln, file, "function: %s", fn);

      duk_pop_2(duk);
    }

    duk_push_context_dump(duk);
    YughInfo("DUK STACK\n%s", duk_to_string(duk, -1));
    duk_pop(duk);
}


duk_ret_t duk_gui_text(duk_context *duk) {
    const char *s = duk_to_string(duk, 0);
    cpVect pos = duk2vec2(duk, 1);

    float size = duk_to_number(duk, 2);
    const float white[3] = {1.f, 1.f, 1.f};
    renderText(s, &pos, size, white, 500);
    return 0;
}

duk_ret_t duk_gui_img(duk_context *duk) {
    const char *img = duk_to_string(duk, 0);
    cpVect pos = duk2vec2(duk, 1);
    gui_draw_img(img, pos.x, pos.y);
    return 0;
}

duk_ret_t duk_nuke(duk_context *duk)
{
    int cmd = duk_to_int(duk, 0);
    float editnum;
    int editint;
    char textbox[130];

    switch(cmd) {
        case 0:
          nuke_begin_win(duk_to_string(duk, 1));
          break;

        case 1:
          nuke_stop();
          break;

        case 2:
          editnum = duk_to_number(duk, 2);
          nuke_property_float(duk_to_string(duk, 1), duk_to_number(duk, 3), &editnum, duk_to_number(duk, 4), duk_to_number(duk, 5), duk_to_number(duk, 5));
          duk_push_number(duk, editnum);
          return 1;

        case 3:
          nuke_nel(duk_to_number(duk, 1));
          return 0;

        case 4:
          editint = duk_to_boolean(duk, 2);
          nuke_checkbox(duk_to_string(duk, 1), &editint);
          duk_push_boolean(duk, editint);
          return 1;

        case 5:
          nuke_label(duk_to_string(duk, 1));
          return 0;

	case 6:
	  duk_push_boolean(duk, nuke_btn(duk_to_string(duk, 1)));
	  return 1;

	case 7:
	  strncpy(textbox, duk_to_string(duk, 1), 130);
	  nuke_edit_str(textbox);
	  duk_push_string(duk, textbox);
	  return 1;

	case 8:
	  nuke_img(duk_to_string(duk, 1));
	  break;
    }

    return 0;
}

duk_ret_t duk_win_make(duk_context *duk) {
    const char *title = duk_to_string(duk, 0);
    int w = duk_to_int(duk, 1);
    int h = duk_to_int(duk, 2);
    struct window *win = MakeSDLWindow(title, w, h, 0);

    duk_push_int(duk, win->id);
    return 1;
}

duk_ret_t duk_spline_cmd(duk_context *duk)
{
    tsBSpline spline;

    int n = duk_get_length(duk, 4);
    int d = duk_to_int(duk, 2);
    cpVect points[n*d]; 

    tsStatus status;
    ts_bspline_new(n, d, duk_to_int(duk, 1), duk_to_int(duk, 3), &spline, &status);

    if (status.code) {
      YughCritical("Spline creation error %d: %s", status.code, status.message);
    }

      for (int i = 0; i < n; i++) {
      duk_get_prop_index(duk, 4, i);

      points[i] = duk2vec2(duk, -1);

      duk_pop(duk);
  }

  ts_bspline_set_control_points(&spline, points, NULL);


  int nsamples = duk_to_int(duk, 5);
  cpVect samples[nsamples];
  int rsamples;
  ts_bspline_sample(&spline, nsamples, &samples, &rsamples, NULL);

    int arridx = duk_push_array(duk);

    duk_require_stack(duk, nsamples*3);

    for (int i = 0; i < nsamples; i++) {
        int pidx = duk_push_array(duk);
            duk_push_number(duk, samples[i].x);
            duk_put_prop_index(duk, pidx, 0);
            duk_push_number(duk, samples[i].y);
            duk_put_prop_index(duk, pidx, 1);
           duk_put_prop_index(duk, arridx, i);
    }

   ts_bspline_free(&spline);

return 1;
}

void ints2duk(int *ints)
{
  int idx = duk_push_array(duk);
  
  for (int i = 0; i < arrlen(ints); i++) {
    duk_push_int(duk, ints[i]);
    duk_put_prop_index(duk, idx, i);
  }
}

int vec_between(cpVect p, cpVect a, cpVect b)
{
  cpVect n;
  n.x = b.x - a.x;
  n.y = b.y - a.y;
  n = cpvnormalize(n);

  return (cpvdot(n, cpvsub(p, a)) > 0 && cpvdot(cpvneg(n), cpvsub(p, b)) > 0);
}

/* Determines between which two points in 'segs' point 'p' falls.
   0 indicates 'p' comes before the first point.
   arrlen(segs) indicates it comes after the last point.
*/
int point2segindex(cpVect p, cpVect *segs, double slop)
{
  float shortest = slop < 0 ? INFINITY : slop;
  int best = -1;

  for (int i = 0; i < arrlen(segs)-1; i++)
  {
    float a = (segs[i+1].y - segs[i].y) / (segs[i+1].x - segs[i].x);
    float c = segs[i].y - (a * segs[i].x);
    float b = -1;

    float dist = abs(a*p.x + b*p.y + c) / sqrt(pow(a,2) + 1);

    if (dist > shortest) continue;

    int between = vec_between(p, segs[i], segs[i+1]);

    if (between) {
      shortest = dist;
      best = i+1;
    } else {
      if (i == 0 && cpvdist(p, segs[0]) < slop) {
        shortest = dist;
	best = i;
      } else if (i == arrlen(segs)-2 && cpvdist(p, arrlast(segs)) < slop) {
        shortest = dist;
	best = arrlen(segs);
      }
    }
  }

  if (best == 1) {
    cpVect n;
    n.x = segs[1].x-segs[0].x;
    n.y = segs[1].y-segs[0].y;
    n = cpvnormalize(n);
    if (cpvdot(n, cpvsub(p, segs[0])) < 0)
      if (cpvdist(p, segs[0]) >= slop)
        best = -1;
      else
        best = 0;
  }

  if (best == arrlen(segs)-1) {
    cpVect n;
    n.x = segs[best-1].x-segs[best].x;
    n.y = segs[best-1].y-segs[best-1].y;
    n = cpvnormalize(n);

    if (cpvdot(n, cpvsub(p, segs[best])) < 0)
      if (cpvdist(p, segs[best]) >= slop)
        best = -1;
      else
        best = arrlen(segs);
  }
  

  return best;
}

int file_exists(char *path)
{
  FILE *o = fopen(path, "r");
  if (o) {
    fclose(o);
    return 1;
  }

  return 0;
}

static char *dukext;
static int dukarr;
static int dukidx;

static int duk2path(const char *path, const struct stat *sb, int typeflag)
{
  if (typeflag == FTW_F) {
    char *ext = strrchr(path, '.');
    if (ext && !strcmp(ext, dukext)) {
      duk_push_string(duk, &path[2]);
      duk_put_prop_index(duk, dukarr, dukidx++);
    }
  }
  
  return 0;
}

void dukext2paths(char *ext)
{
  dukext = ext;
  dukarr = duk_push_array(duk);
  dukidx = 0;
  ftw(".", duk2path, 10);
}

duk_ret_t duk_cmd(duk_context *duk) {
    int cmd = duk_to_int(duk, 0);

  switch(cmd) {
    case 0:
      duk_push_int(duk, script_dofile(duk_to_string(duk, 1)));
      return 1;

      case 1:
        set_pawn(duk_get_heapptr(duk, 1));
        break;

       case 2:
         gameobject_delete(duk_get_int(duk, 1));
         break;

       case 3:
         set_timescale(duk_get_number(duk,1));
         break;

       case 4:
         debug_draw_phys(duk_get_boolean(duk, 1));
         break;

       case 5:
         renderMS = duk_get_number(duk, 1);
         break;

       case 6:
         updateMS = duk_get_number(duk, 1);
         break;

       case 7:
         physMS = duk_get_number(duk, 1);
         break;

       case 8:
         phys2d_set_gravity(duk2vec2(duk, 1));
         break;

       case 9:
         sprite_delete(duk_to_int(duk, 1));
         break;

       case 10:
         remove_pawn(duk_get_heapptr(duk, 1));
         break;

       case 11:
         duk_push_int(duk, file_mod_secs(duk_to_string(duk, 1)));
         return 1;
         break;

       case 12:
         sprite_loadtex(id2sprite(duk_to_int(duk, 1)), duk_to_string(duk, 2));
         break;

       case 13:
         play_song(duk_to_string(duk, 1), duk_to_string(duk, 2));
         break;

       case 14:
         play_oneshot(make_sound(duk_to_string(duk, 1)));
         break;

       case 15:
         music_stop();
         break;

       case 16:
         color2float(duk2color(duk, 1), dbg_color);
         break;

       case 17:
         color2float(duk2color(duk, 1), trigger_color);
         break;

       case 18:
         shape_set_sensor(duk_to_pointer(duk, 1), duk_to_boolean(duk, 2));
         break;

       case 19:
         mix_master_vol(duk_to_number(duk, 1));
         break;

       case 20:
         sprite_enabled(duk_to_int(duk, 1), duk_to_boolean(duk, 2));
         break;

       case 21:
         duk_push_boolean(duk, shape_get_sensor(duk_to_pointer(duk, 1)));
         return 1;

       case 22:
         shape_enabled(duk_to_pointer(duk, 1), duk_to_boolean(duk, 2));
         break;

       case 23:
         duk_push_boolean(duk, shape_is_enabled(duk_to_pointer(duk, 1)));
         return 1;

       case 24:
         timer_pause(id2timer(duk_to_int(duk, 1)));
         break;

       case 25:
         timer_stop(id2timer(duk_to_int(duk, 1)));
         break;

       case 26:
         timer_start(id2timer(duk_to_int(duk, 1)));
         break;

       case 27:
         timer_remove(id2timer(duk_to_int(duk, 1)));
         break;

       case 28:
         timerr_settime(id2timer(duk_to_int(duk, 1)), duk_to_number(duk, 2));
         break;

       case 29:
         duk_push_number(duk, id2timer(duk_to_int(duk, 1))->interval);
         return 1;

       case 30:
         sprite_setanim(id2sprite(duk_to_int(duk, 1)), duk_to_pointer(duk, 2), duk_to_int(duk, 3));
         return 0;

       case 31:
         free(duk_to_pointer(duk, 1));
         break;

       case 32:
         duk_push_number(duk, id2timer(duk_to_int(duk, 1))->remain_time);
         return 1;

       case 33:
         duk_push_boolean(duk, ((struct timer*)duk_to_pointer(duk, 1))->on);
         return 1;

       case 34:
         duk_push_boolean(duk, ((struct timer*)duk_to_pointer(duk, 1))->repeat);
         return 1;

       case 35:
         ((struct timer*)duk_to_pointer(duk, 1))->repeat = duk_to_boolean(duk, 2);
         return 0;

       case 36:
         id2go(duk_to_int(duk, 1))->scale = duk_to_number(duk, 2);
         cpSpaceReindexShapesForBody(space, id2go(duk_to_int(duk, 1))->body);
         return 0;

       case 37:
         if (!id2sprite(duk_to_int(duk, 1))) return 0;
         vec2float(duk2vec2(duk, 2), id2sprite(duk_to_int(duk, 1))->pos);
         break;

       case 38:
         duk_push_string(duk, slurp_text(duk_to_string(duk, 1)));
         return 1;

       case 39:
         duk_push_int(duk, slurp_write(duk_to_string(duk, 1), duk_to_string(duk, 2)));
         return 1;

       case 40:
         id2go(duk_to_int(duk, 1))->filter.categories = duk2bitmask(duk, 2);
	 gameobject_apply(id2go(duk_to_int(duk, 1)));
	 break;

       case 41:
         id2go(duk_to_int(duk, 1))->filter.mask = duk2bitmask(duk, 2);
	 gameobject_apply(id2go(duk_to_int(duk, 1)));
	 break;

       case 42:
         bitmask2duk(duk, id2go(duk_to_int(duk, 1))->filter.categories);
	 return 1;

       case 43:
         bitmask2duk(duk, id2go(duk_to_int(duk, 1))->filter.mask);
	 return 1;

       case 44:
         duk_push_int(duk, pos2gameobject(duk2vec2(duk, 1)));
	 return 1;

       case 45:
         vect2duk(mouse_pos);
	 return 1;
	 
       case 46:
         set_mouse_mode(duk_to_int(duk, 1));
	 return 0;

	case 47:
	  draw_grid(duk_to_int(duk, 1), duk_to_int(duk, 2));
	  return 0;

	case 48:
	  duk_push_int(duk, mainwin->width);
	  return 1;

	case 49:
	  duk_push_int(duk, mainwin->height);
	  return 1;
	  
	case 50:
	  duk_push_boolean(duk, action_down(duk_to_int(duk, 1)));
	  return 1;
	  
	case 51:
	  draw_cppoint(duk2vec2(duk, 1), duk_to_number(duk, 2));
	  return 0;
	  
	case 52:
	  ints2duk(phys2d_query_box(duk2vec2(duk, 1), duk2vec2(duk, 2)));
	  return 1;
	  
	case 53:
	  draw_box(duk2vec2(duk, 1), duk2vec2(duk, 2));
	  return 0;

	case 54:
	  gameobject_apply(id2go(duk_to_int(duk, 1)));
	  return 0;

	case 55:
	  duk2go(duk, 1)->flipx = duk_to_boolean(duk, 2) ? -1 : 1;
	  gameobject_apply(duk2go(duk, 1));
	  return 0;

	case 56:
	  duk2go(duk, 1)->flipy = duk_to_boolean(duk, 2) ? -1 : 1;
	  gameobject_apply(duk2go(duk, 1));
	  return 0;

	case 57:
	  duk_push_boolean(duk, duk2go(duk, 1)->flipx == -1 ? 1 : 0);
	  return 1;

	case 58:
	  duk_push_boolean(duk, duk2go(duk, 1)->flipy == -1 ? 1 : 0);
	  return 1;

	case 59:
	  duk_push_int(duk, point2segindex(duk2vec2(duk, 1), duk2cpvec2arr(duk, 2), duk_to_number(duk, 3)));
	  return 1;
	  
	case 60:
	  if (!id2sprite(duk_to_int(duk, 1))) return 0;
          id2sprite(duk_to_int(duk, 1))->layer = duk_to_int(duk, 2);
	  break;
	
	case 61:
	  set_cam_body(id2body(duk_to_int(duk, 1)));
	  break;
	  
	case 62:
	  add_zoom(duk_to_number(duk, 1));
	  break;
	  
	case 63:
	  duk_push_number(duk, deltaT);
	  return 1;
	  
	case 64:
	  vect2duk(tex_get_dimensions(texture_pullfromfile(duk_to_string(duk, 1))));
	  return 1;
	  
	case 65:
	  duk_push_boolean(duk, file_exists(duk_to_string(duk, 1)));
	  return 1;
	  
	case 66:
	  dukext2paths(duk_to_string(duk, 1));
	  return 1;

	case 67:
	  opengl_rendermode(LIT);
	  break;

	case 68:
	  opengl_rendermode(WIREFRAME);
	  break;

	case 69:
	  gameobject_set_sensor(duk_to_int(duk, 1), duk_to_boolean(duk,2));
	  break;
    }

    return 0;
}

duk_ret_t duk_register(duk_context *duk) {
    int cmd = duk_to_int(duk, 0);
    void *fn = duk_get_heapptr(duk, 1);
    void *obj = duk_get_heapptr(duk, 2);

   struct callee c = {fn, obj};

   switch(cmd) {
     case 0:
       register_update(c);
       break;

     case 1:
       register_physics(c);
       break;

     case 2:
       register_gui(c);
       break;

     case 3:
       register_nk_gui(c);
       break;
     }

   return 0;
}

void gameobject_add_shape_collider(int go, struct callee c, struct phys2d_shape *shape)
{
  struct shape_cb shapecb;
  shapecb.shape = shape->shape;
  shapecb.cbs.begin = c;
  arrpush(id2go(go)->shape_cbs, shapecb);
}

duk_ret_t duk_register_collide(duk_context *duk) {
    int cmd = duk_to_int(duk, 0);
    void *fn = duk_get_heapptr(duk, 1);
    void *obj = duk_get_heapptr(duk, 2);
    int go = duk_get_int(duk, 3);
    struct callee c = {fn, obj};

    switch(cmd) {
      case 0:
        phys2d_add_handler_type(cmd, go, c);
        break;

      case 1:
        gameobject_add_shape_collider(go, c, duk_get_pointer(duk,4));
	break;
    }

    return 0;
}

duk_ret_t duk_sys_cmd(duk_context *duk) {
    int cmd = duk_to_int(duk, 0);

    switch (cmd) {
        case 0:
            quit();
            break;

        case 1:
            sim_start();
            cpSpaceReindexStatic(space);
            break;

        case 2:
            sim_stop();
            break;

        case 3:
            sim_pause();
            break;

        case 4:
            sim_step();
            break;

        case 5:
            duk_push_boolean(duk, sim_playing());
            return 1;

        case 6:
            duk_push_boolean(duk, sim_paused());
            return 1;

        case 7:
            duk_push_int(duk, MakeGameobject());
            return 1;

        case 8:
            duk_push_int(duk, frame_fps());
            return 1;

        case 9: /* Clear the level out */
            new_level();
            break;

    }

    return 0;
}

duk_ret_t duk_make_gameobject(duk_context *duk) {
    int g = MakeGameobject();
    struct gameobject *go = get_gameobject_from_id(g);

    go->scale = duk_to_number(duk, 0);
    go->bodytype = duk_to_int(duk, 1);
    go->mass = duk_to_number(duk, 2);
    go->f = duk_to_number(duk, 3);
    go->e = duk_to_number(duk, 4);
    go->flipx = 1.f;
    go->flipy = 1.f;

    gameobject_apply(go);

    duk_push_int(duk, g);
    return 1;
}

duk_ret_t duk_yughlog(duk_context *duk) {
    int cmd = duk_to_int(duk, 0);
    const char *s = duk_to_string(duk,1);
    const char *f = duk_to_string(duk, 2);
    int line = duk_to_int(duk, 3);

    mYughLog(1, cmd, line, f, s);

    return 0;
}

duk_ret_t duk_set_body(duk_context *duk) {
  int cmd = duk_to_int(duk, 0);
  int id = duk_to_int(duk, 1);
  struct gameobject *go = get_gameobject_from_id(id);

  /* TODO: Possible that reindexing shapes only needs done for static shapes? */
  switch (cmd) {
    case 0:
      gameobject_setangle(go, duk_to_number(duk, 2));
      break;

    case 1:
      cpBodySetType(go->body, duk_to_int(duk, 2));
      break;

    case 2:
      cpBodySetPosition(go->body, duk2vec2(duk, 2));
      break;

    case 3:
      gameobject_move(go, duk2vec2(duk, 2));
      break;

    case 4:
      cpBodyApplyImpulseAtWorldPoint(go->body, duk2vec2(duk, 2), cpBodyGetPosition(go->body));
      return 0;

    case 5:
      go->flipx = duk_to_boolean(duk, 2);
      break;

    case 6:
      go->flipy = duk_to_boolean(duk, 2);
      break;

    case 7:
      cpBodySetMass(go->body, duk_to_number(duk, 2));
      break;

    case 8:
      cpBodySetAngularVelocity(go->body, duk_to_number(duk, 2));
      break;

    case 9:
      cpBodySetVelocity(go->body, duk2vec2(duk, 2));
      break;

  }

  cpSpaceReindexShapesForBody(space, go->body);

  return 0;
}

duk_ret_t duk_q_body(duk_context *duk) {
    int q = duk_to_int(duk, 0);
    struct gameobject *go = get_gameobject_from_id(duk_to_int(duk, 1));

    if (!go) return 0;

    switch(q) {
        case 0:
          duk_push_int(duk, cpBodyGetType(go->body));
          return 1;

        case 1:
          vect2duk(cpBodyGetPosition(go->body));
          return 1;

        case 2:
          duk_push_number(duk, cpBodyGetAngle(go->body));
          return 1;

        case 3:
          vect2duk(cpBodyGetVelocity(go->body));
          return 1;

        case 4:
          duk_push_number(duk, cpBodyGetAngularVelocity(go->body));
          return 1;

        case 5:
          duk_push_number(duk, cpBodyGetMass(go->body));
          return 1;
    }

    return 0;
}

duk_ret_t duk_make_sprite(duk_context *duk) {
  int go = duk_to_int(duk, 0);
  const char *path = duk_to_string(duk, 1);
  cpVect pos = duk2vec2(duk, 2);
  int sprite = make_sprite(go);
  struct sprite *sp = id2sprite(sprite);
  sprite_loadtex(sp, path);
  sp->pos[0] = pos.x;
  sp->pos[1] = pos.y;

  duk_push_int(duk, sprite);
  return 1;
}

/* Make anim from texture */
duk_ret_t duk_make_anim2d(duk_context *duk) {
  const char *path = duk_to_string(duk, 0);
  int frames = duk_to_int(duk, 1);
  int fps = duk_to_int(duk, 2);

  struct TexAnim *anim = anim2d_from_tex(path, frames, fps);

  duk_push_pointer(duk, anim);
  return 1;
}

duk_ret_t duk_make_box2d(duk_context *duk) {
  int go = duk_to_int(duk, 0);
  cpVect size = duk2vec2(duk, 1);
  cpVect offset = duk2vec2(duk, 2);

  struct phys2d_box *box = Make2DBox(go);
  box->w = size.x;
  box->h = size.y;
  box->offset[0] = offset.x;
  box->offset[1] = offset.y;

  phys2d_applybox(box);

      int idx = duk_push_object(duk);
    duk_push_pointer(duk, &box->shape);
    duk_put_prop_string(duk, idx, "id");
    duk_push_pointer(duk, box);
    duk_put_prop_string(duk, idx, "shape");

  return 1;
}

duk_ret_t duk_cmd_box2d(duk_context *duk)
{
    int cmd = duk_to_int(duk, 0);
    struct phys2d_box *box = duk_to_pointer(duk, 1);
    cpVect arg;

    if (!box) return 0;

    switch(cmd) {
        case 0:
          arg = duk2vec2(duk, 2);
          box->w = arg.x;
          box->h = arg.y;
          break;

        case 1:
          arg = duk2vec2(duk, 2);
          box->offset[0] = arg.x;
          box->offset[1] = arg.y;
          break;

        case 2:
          box->rotation = duk_to_number(duk, 2);
          break;
    }

    phys2d_applybox(box);
    return 0;
}

duk_ret_t duk_make_circle2d(duk_context *duk) {
   int go = duk_to_int(duk, 0);
  double radius = duk_to_number(duk, 1);

    struct phys2d_circle *circle = Make2DCircle(go);
    circle->radius = radius;
    circle->offset = duk2vec2(duk, 2);

    phys2d_applycircle(circle);

    int idx = duk_push_object(duk);
    duk_push_pointer(duk, &circle->shape);
    duk_put_prop_string(duk, idx, "id");
    duk_push_pointer(duk, circle);
    duk_put_prop_string(duk, idx, "shape");

  return 1;
}

duk_ret_t duk_cmd_circle2d(duk_context *duk)
{
    int cmd = duk_to_int(duk, 0);
    struct phys2d_circle *circle = duk_to_pointer(duk, 1);

    if (!circle) return 0;

    switch(cmd) {
        case 0:
          circle->radius = duk_to_number(duk, 2);
          break;

        case 1:
          circle->offset = duk2vec2(duk, 2);
          break;
    }

    phys2d_applycircle(circle);
    return 0;
}

duk_ret_t duk_make_poly2d(duk_context *duk)
{
  int go = duk_to_int(duk, 0);
  struct phys2d_poly *poly = Make2DPoly(go);
  phys2d_poly_setverts(poly, duk2cpvec2arr(duk,1));

  int idx = duk_push_object(duk);
  duk_push_pointer(duk, poly);
  duk_put_prop_string(duk, idx, "id");
  duk_push_pointer(duk, &poly->shape);
  duk_put_prop_string(duk, idx, "shape");

  return 1;
}

duk_ret_t duk_cmd_poly2d(duk_context *duk)
{
  int cmd = duk_to_int(duk,0);
  struct phys2d_poly *poly = duk_to_pointer(duk,1);
  
  switch(cmd) {
    case 0:
      phys2d_poly_setverts(poly, duk2cpvec2arr(duk,2));
      break;
  }
  
  return 0;  
}

duk_ret_t duk_make_edge2d(duk_context *duk)
{
  int go = duk_to_int(duk, 0);
  struct phys2d_edge *edge = Make2DEdge(go);

  int arridx = 1;

  int n = duk_get_length(duk, arridx);
  cpVect points[n];

  for (int i = 0; i < n; i++) {
      duk_get_prop_index(duk, arridx, i);

      points[i] = duk2vec2(duk, -1);

      phys2d_edgeaddvert(edge);
      phys2d_edge_setvert(edge, i, points[i]);
  }

      int idx = duk_push_object(duk);
    duk_push_pointer(duk, &edge->shape);
    duk_put_prop_string(duk, idx, "id");
    duk_push_pointer(duk, edge);
    duk_put_prop_string(duk, idx, "shape");

  return 1;
}

duk_ret_t duk_cmd_edge2d(duk_context *duk)
{
  int cmd = duk_to_int(duk, 0);
  struct phys2d_edge *edge = duk_to_pointer(duk, 1);

  switch(cmd) {
    case 0:
      phys2d_edge_clearverts(edge);
      phys2d_edge_addverts(edge, duk2cpvec2arr(duk, 2));
      break;
      
    case 1:
      edge->thickness = duk_to_number(duk, 2);
      break;
  }
  
  return 0;
}

/* These are anims for controlling properties on an object */
duk_ret_t duk_anim(duk_context *duk) {
    void *prop = duk_get_heapptr(duk, 0);
    int keyframes = duk_get_length(duk, 1);
    YughInfo("Processing %d keyframes.", keyframes);

    struct anim a = make_anim();

    for (int i  = 0; i < keyframes; i++) {
        struct keyframe k;
        duk_get_prop_index(duk, 1, i); /* End of stack is now the keyframe */
        cpVect v = duk2vec2(duk, duk_get_top_index(duk));
        k.time = v.y;
        k.val = v.x;
        a = anim_add_keyframe(a, k);
    }

    for (double i = 0; i < 3.0; i = i + 0.1) {
        YughInfo("Val is now %f at time %f", anim_val(a, i), i);
        duk_push_heapptr(duk, prop);
        duk_push_number(duk, anim_val(a, i));
        duk_call(duk, 1);
        duk_pop(duk);
    }

    return 0;
}

duk_ret_t duk_make_timer(duk_context *duk) {
    void *sym = duk_get_heapptr(duk, 0);
    double secs = duk_to_number(duk, 1);
    void *obj = duk_get_heapptr(duk, 2);
    struct callee *c = malloc(sizeof(*c));
    c->fn = sym;
    c->obj = obj;
    struct timer *timer = timer_make(secs, call_callee, c, 1);

    duk_push_int(duk, timer->timerid);
    return 1;
}

#define DUK_FUNC(NAME, ARGS) duk_push_c_function(duk, duk_##NAME, ARGS); duk_put_global_string(duk, #NAME);

void ffi_load()
{
    DUK_FUNC(yughlog, 4);
    DUK_FUNC(nuke, DUK_VARARGS);
    DUK_FUNC(make_gameobject, 7);
    DUK_FUNC(set_body, 3);
    DUK_FUNC(q_body, 2);

    DUK_FUNC(sys_cmd, 1);
    DUK_FUNC(win_make, 3);

    DUK_FUNC(make_sprite, 3);
    DUK_FUNC(make_anim2d, 3);
    DUK_FUNC(spline_cmd, 6);
    
    DUK_FUNC(make_box2d, 3);
    DUK_FUNC(cmd_box2d, DUK_VARARGS);
    DUK_FUNC(make_circle2d, 3);
    DUK_FUNC(cmd_circle2d, DUK_VARARGS);
    DUK_FUNC(make_poly2d, 2);
    DUK_FUNC(cmd_poly2d, DUK_VARARGS);
    DUK_FUNC(make_edge2d, 3);
    DUK_FUNC(cmd_edge2d, DUK_VARARGS);
    DUK_FUNC(make_timer, 3);

    DUK_FUNC(cmd, DUK_VARARGS);
    DUK_FUNC(register, 3);
    DUK_FUNC(register_collide, DUK_VARARGS);

    DUK_FUNC(gui_text, 3);
    DUK_FUNC(gui_img, 2);



    DUK_FUNC(anim, 2);
}