#pragma once

#include "../util.h"

const static U32 RAY_ITER_MAX = 10;
const static U32 TRACE_HIT_NONE = (U32)-1;

enum TraceHitType_t {
  TH_NONE,
  TH_WALL,
  TH_CEILING,
  TH_FLOOR
};

enum TraceFilter_t {
  TF_NONE = 0x0,
  TF_WALLS = 0x1,
  TF_SPRITES = 0x2,
  TF_ENTITIES = 0x4,

  TF_WORLD = TF_WALLS | TF_SPRITES,
  TF_ALL = TF_WALLS | TF_SPRITES | TF_ENTITIES,
};

struct TRACE {
  /* input */
  VEC3 startpos;
  /* output*/
  VEC3 endpos;
  /* output */
  F32  fract;
  /* output */
  F32  hitang;
  /* output */
  U32  hitwall;
  /* input */
  U32  filter;
};

struct RAY_HITDATA {
  VEC3 point;
  F32  dist;
  F32  ang;

  U8 type;
  U32 obj_idx;
};

extern LIST<RAY_HITDATA> ray_trace_list( VEC3 start, F32 ang, U32 max_iter = RAY_ITER_MAX );
extern LIST<RAY_HITDATA> ray_trace_list( VEC3 start, VEC3 end, U32 max_iter = RAY_ITER_MAX );

extern U32 ray_trace( TRACE* tr, F32 ang );
extern U32 ray_trace( TRACE* tr, VEC3 end );
extern U32 ray_trace( TRACE* tr, VEC3 start, F32 ang );
extern U32 ray_trace( TRACE* tr, VEC3 start, VEC3 end );

extern VEC2 project_vertex(
    VEC3 vertex_pos,
    VEC3 player_pos,
    F32 player_angle_deg,
    F32 fov_deg,
    VEC2 window,
    VEC2 winsize,
    U8* in_view = 0
);