//! `SideTex` type.

use crate::{bin::OptU16, err::*};
use super::pnts;

/// Reads a `SideTex` object.
pub fn read(b: &[u8]) -> ResultS<SideTex>
{
   read_data! {
      endian: BIG, buf: b, size: 6, start: 0, data {
         let offs   = pnts::read_o[0; 4];
         let tex_id = OptU16[4];
      }
   }

   Ok(SideTex{offs, tex_id})
}

/// Writes a `SideTex` object.
pub fn write(v: &SideTex) -> Vec<u8>
{
   let mut o = Vec::with_capacity(6);
   o.extend(pnts::write_o(v.offs));
   o.extend(&v.tex_id.to_be_bytes());
   o
}

/// The texture of a side segment.
#[cfg_attr(feature = "serde_obj", derive(serde::Serialize))]
#[derive(Clone, Debug, Eq, PartialEq)]
pub struct SideTex
{
   pub offs:   pnts::Point,
   pub tex_id: OptU16,
}

// EOF