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use crate::packets::{ReadWrite, Resource};
use anyhow::{Result, bail};
use glam::{Affine3A, Vec3A};
use log::warn;
use std::io::{Read, Write};
#[derive(Debug, Default, Clone)]
pub struct Prefab(pub Vec<(Affine3A, Resource)>);
#[derive(Debug, Default, Clone)]
pub struct Part {
pub index: Option<Resource>,
pub va_position: Option<[Attribute; 3]>,
pub va_normal: Option<[Attribute; 3]>,
pub va_texcoord: Option<[Attribute; 2]>,
pub va_pbr_roughness: Option<Attribute>,
pub va_pbr_metallic: Option<Attribute>,
pub va_pbr_albedo: Option<[Attribute; 3]>,
pub va_pbr_transmission: Option<Attribute>,
}
#[derive(Debug, Clone)]
pub enum Attribute {
Constant(f32),
Vertex(Resource),
Texture(Resource),
}
#[derive(Debug, Default, Clone)]
pub struct AttributeArray(pub Vec<f32>);
#[derive(Debug, Default, Clone)]
pub struct IndexArray(pub Vec<[u16; 3]>);
impl ReadWrite for Prefab {
fn write(&self, w: &mut dyn Write) -> Result<()> {
for (aff, res) in self.0.clone() {
aff.write(w)?;
res.write(w)?;
}
Ok(())
}
fn read(r: &mut dyn Read) -> Result<Self> {
let mut s = Prefab::default();
let mut g = Vec::new();
r.read_to_end(&mut g)?;
while !g.is_empty() {
s.0.push((Affine3A::read(r)?, Resource::read(r)?))
}
Ok(s)
}
}
impl ReadWrite for IndexArray {
fn write(&self, w: &mut dyn Write) -> Result<()> {
for x in self.0.clone() {
w.write_all(x.map(|x| x.to_be_bytes()).as_flattened())?;
}
Ok(())
}
fn read(r: &mut dyn Read) -> Result<Self> {
let mut s = Self(Vec::new());
let mut g = Vec::new();
r.read_to_end(&mut g)?;
for x in g.iter().array_chunks::<2>().array_chunks::<3>() {
s.0.push(x.map(|x| u16::from_be_bytes(x.map(|x| *x))))
}
Ok(s)
}
}
impl ReadWrite for AttributeArray {
fn write(&self, w: &mut dyn Write) -> Result<()> {
for x in self.0.clone() {
w.write_all(&x.to_be_bytes())?;
}
Ok(())
}
fn read(r: &mut dyn Read) -> Result<Self> {
let mut s = Self(Vec::new());
let mut g = Vec::new();
r.read_to_end(&mut g)?;
for x in g.iter().array_chunks::<4>() {
s.0.push(f32::from_be_bytes(x.map(|x| *x)))
}
Ok(s)
}
}
impl ReadWrite for Part {
fn write(&self, w: &mut dyn Write) -> Result<()> {
if let Some(a) = &self.index {
write_kv(w, b"index", &a.write_alloc())?;
}
if let Some(a) = &self.va_position {
write_kv(w, b"va_position", &a.write_alloc())?;
}
if let Some(a) = &self.va_normal {
write_kv(w, b"va_normal", &a.write_alloc())?;
}
if let Some(a) = &self.va_texcoord {
write_kv(w, b"va_texcoord", &a.write_alloc())?;
}
if let Some(a) = &self.va_pbr_roughness {
write_kv(w, b"va_pbr_roughness", &a.write_alloc())?;
}
if let Some(a) = &self.va_pbr_metallic {
write_kv(w, b"va_pbr_metallic", &a.write_alloc())?;
}
if let Some(a) = &self.va_pbr_albedo {
write_kv(w, b"va_pbr_albedo", &a.write_alloc())?;
}
Ok(())
}
fn read(r: &mut dyn Read) -> Result<Self> {
let mut s = Self::default();
let mut g = Vec::new();
r.read_to_end(&mut g)?;
let mut g = g.as_slice();
while !g.is_empty() {
let (k, v) = read_kv(&mut g)?;
let mut v = v.as_slice();
match k.as_slice() {
b"index" => s.index = Some(<_ as ReadWrite>::read(&mut v)?),
b"va_position" => s.va_position = Some(<_ as ReadWrite>::read(&mut v)?),
b"va_normal" => s.va_normal = Some(<_ as ReadWrite>::read(&mut v)?),
b"va_texcoord" => s.va_texcoord = Some(<_ as ReadWrite>::read(&mut v)?),
b"va_pbr_roughness" => s.va_pbr_roughness = Some(<_ as ReadWrite>::read(&mut v)?),
b"va_pbr_metallic" => s.va_pbr_metallic = Some(<_ as ReadWrite>::read(&mut v)?),
b"va_pbr_albedo" => s.va_pbr_albedo = Some(<_ as ReadWrite>::read(&mut v)?),
b"va_pbr_transmission" => {
s.va_pbr_transmission = Some(<_ as ReadWrite>::read(&mut v)?)
}
_ => warn!("unknown part key"),
}
}
Ok(s)
}
}
fn read_kv(r: &mut dyn Read) -> Result<(Vec<u8>, Vec<u8>)> {
let mut key_size = [0; 2];
let mut value_size = [0; 2];
r.read_exact(&mut key_size)?;
r.read_exact(&mut value_size)?;
let key_size = u16::from_be_bytes(key_size);
let value_size = u16::from_be_bytes(value_size);
let mut key = vec![0; key_size as usize];
let mut value = vec![0; value_size as usize];
r.read_exact(&mut value)?;
r.read_exact(&mut key)?;
Ok((key, value))
}
fn write_kv(w: &mut dyn Write, key: &[u8], value: &[u8]) -> Result<()> {
w.write_all(&(key.len() as u16).to_be_bytes())?;
w.write_all(&(value.len() as u16).to_be_bytes())?;
w.write_all(key)?;
w.write_all(value)?;
Ok(())
}
impl ReadWrite for Attribute {
fn write(&self, w: &mut dyn Write) -> Result<()> {
match self {
Attribute::Constant(v) => {
w.write_all(&[0x01])?;
w.write_all(&v.to_be_bytes())?;
}
Attribute::Vertex(resource) => {
w.write_all(&[0x02])?;
resource.write(w)?;
}
Attribute::Texture(resource) => {
w.write_all(&[0x03])?;
resource.write(w)?;
}
}
Ok(())
}
fn read(r: &mut dyn Read) -> Result<Self> {
let mut tag = [0u8; 1];
r.read_exact(&mut tag)?;
Ok(match tag[0] {
0x01 => Self::Constant(f32::read(r)?),
0x02 => Self::Vertex(Resource::read(r)?),
0x03 => Self::Texture(Resource::read(r)?),
_ => bail!("unknown attribute tag"),
})
}
}
impl ReadWrite for Vec3A {
fn write(&self, w: &mut dyn Write) -> Result<()> {
w.write_all(&self.x.to_be_bytes())?;
w.write_all(&self.y.to_be_bytes())?;
w.write_all(&self.z.to_be_bytes())?;
Ok(())
}
fn read(r: &mut dyn Read) -> Result<Self> {
Ok(Self::new(f32::read(r)?, f32::read(r)?, f32::read(r)?))
}
}
impl ReadWrite for Affine3A {
fn write(&self, w: &mut dyn Write) -> Result<()> {
for v in self.to_cols_array() {
v.write(w)?
}
Ok(())
}
fn read(r: &mut dyn Read) -> Result<Self> {
Ok(Self::from_cols_array(&[(); 12].try_map(|()| f32::read(r))?))
}
}
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