vault_itemobj.h

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/// @file
/// Vault's interiors, before and after the thieves are caught: an item lying on
/// the floor, drawn as its menu icon (the Bone, at (568, 16, 672)).
#include "types.h"
#include "field_obj.h"
#include "field_event.h"
 
/// Creates object 22 at the 16.16 position and draws it as the item's icon: the
/// sprite's own animation is stopped (flags and count 0, 16-colour, palette 0),
/// the object stays put (motionFlags 0), and the icon's tiles, decoded into
/// heap block 17, are loaded into the sprite's VRAM block.
void Vault_PlaceItemIcon(s32 item, s32 fixed_x, s32 fixed_y, s32 fixed_z) {
  u8 *object;
  u8 *sprite;
  u8 *field;
  u8 *icon;
  s32 zero;
  s32 mask;
 
  zero = 0;
  object = (u8 *)Engine_ObjectCreate(22, fixed_x, fixed_y, fixed_z);
  if (object != 0) {
    sprite = (u8 *)((struct FieldActor *)object)->sprite;
    field = sprite + 38; // flags, then count
    *field = zero;
    field += 1;
    *field = zero;
    mask = 33;
    mask = -mask; // ~32: image.fullColor
    sprite[5] &= mask;
    sprite[9] &= 15;     // image.palette
    object[0x55] = zero; // motionFlags
    object[0x5c] = 1;
    icon = Engine_HeapAllocate(17, 0x608);
    Engine_ItemLoadIcon(item);
    icon += 0x400;
    Engine_VramLoad(sprite[28], 0x80, icon); // sprite->slot
    Engine_HeapRelease(17);
  }
}