#pragma once

//------------------------------------------------------------------------------------------
//~ structs

typedef union Vec3F32 Vec3F32;
union Vec3F32
{
  struct 
  {
    F32 x;
    F32 y;
    F32 z;
  };
  struct 
  {
    F32 r;
    F32 g;
    F32 b;
  };
  F32 v[3];
};

typedef struct RngF32 RngF32;
struct RngF32 
{
  F32 min;
  F32 max;
};

typedef struct RayF32 RayF32;
struct RayF32
{
  Vec3F32 origin;
  Vec3F32 direction;
};


//------------------------------------------------------------------------------------------
//~ forward declarations


__host__ __device__ inline function Vec3F32 vec3F32(F32 x, F32 y, F32 z);
__host__ __device__ inline function Vec3F32 add_V3F32(Vec3F32 a, Vec3F32 b);
__host__ __device__ inline function Vec3F32 sub_V3F32(Vec3F32 a, Vec3F32 b);
__host__ __device__ inline function Vec3F32 scale_V3F32(F32 s, Vec3F32 v);


__host__ __device__ inline function Vec3F32 ray_point_F32(F32 t, RayF32 *ray);
__host__ __device__ inline function F32 mag_V3F32(Vec3F32 a);
__host__ __device__ inline function F32 dot_V3F32(Vec3F32 a, Vec3F32 b);
__device__  inline function F32 norm_V3F32(Vec3F32 a);

__host__ __device__ function Vec3F32 lerp_V3F32(F32 s, Vec3F32 a, Vec3F32 b);

__device__ function Vec3F32 rand_uniform_V3F32(curandState *local_rand_state);
__device__ function Vec3F32 rand_uniform_range_V3F32(RngF32 rng, curandState *local_rand_state);

__host__ function F32 linear_to_gamma(F32 val);
__host__ inline function F32 h_norm_V3F32(Vec3F32 a);

__device__ function F32 clamp_F32(RngF32 rng, F32 val);
__device__ function Vec3F32 clamp_V3F32(RngF32 rng, Vec3F32 v);