main.c

#include "gfx.h"
#include "mods.h"
#include "npc.h"

void kill_npc(zNPCInstance *a, zNPCCommon *npc) {
  void (*kill)(zNPCCommon *) = vtable(npc, 0xdc, 0x15);
  kill(npc);
}

void freeze_npc(zNPCInstance *a, zNPCCommon *npc) {
  void (*freeze)(zNPCCommon *) = vtable(npc, 0xdc, 0x63);
  freeze(npc);
}

void (*CheatLevelLocksmith)() = (void *)0x80091f5c;
bool *dev_cheats_enabled = (bool *)0x803988ed;

/** Gets called at the start of while loop in void Global::zGameLoop(void)
 */
void game_loop_hook() {
  /* *dev_cheats_enabled = true; */
  CheatLevelLocksmith();
  /* iter_npcs(freeze_npc); */
#ifdef HEAD_MOD
  scale_head();
#endif
}

xVec3 *(*xEntGetPos)(zNPCCommon *) = (void *)0x80025424;
float (*GetHealthPercent)(zNPCCommon *) = (void *)0x80116a9c;

void draw_marker(zNPCInstance *a, zNPCCommon *npc) {
  xVec3 *v = xEntGetPos(npc);
  xVec3 screen;
  float f = world_to_screen(&screen, v);
  if (f <= 0 || f >= 1 || !should_have_data(a, npc))
    return;

  float scale = f * 10;

  short cur_hp = get_cur_hp(npc);
  short max_hp = get_max_hp(npc);

  float percent = (float)cur_hp / max_hp;
  char buf[100];
  _sprintf(buf, "%d/%d", cur_hp, max_hp);

  unsigned int red = (unsigned int)(255 * (1 - percent));
  unsigned int green = (unsigned int)(255 * percent);
  unsigned int color = (red << 24) | (green << 16) | 0xff;

  draw_text(buf, screen.x, screen.y, scale, color, 0);
}

void end_of_render() { iter_npcs(draw_marker); }