JSON file processing (MC assets) #175
Description
There's three big blobs (one on block_state.rs, two on model.rs) which could be a lot simpler if we used the auto-derive capabilities of json::decode.
Example:
extern crate "rustc-serialize" as rustc_serialize;
use std::collections::BTreeMap;
use std::io::File;
use std::io::fs::walk_dir;
use rustc_serialize::Decodable;
use rustc_serialize::json::{self, Json};
#[derive(RustcDecodable, PartialEq, Show)]
struct FaceInfo {
cullface: Option<String>,
rotation: Option<i64>,
texture: String,
tintindex: Option<i64>,
uv: Option<Vec<f64>>,
}
#[derive(RustcDecodable, PartialEq, Show)]
struct Faces {
down: Option<FaceInfo>,
east: Option<FaceInfo>,
north: Option<FaceInfo>,
south: Option<FaceInfo>,
up: Option<FaceInfo>,
west: Option<FaceInfo>,
}
#[derive(RustcDecodable, PartialEq, Show)]
struct Rotation {
angle: f64,
axis: String,
origin: Vec<f64>,
rescale: Option<bool>,
}
#[derive(RustcDecodable, PartialEq, Show)]
struct Element {
from: Vec<f64>,
to: Vec<f64>,
rotation: Option<Rotation>,
shade: Option<bool>,
faces: Faces,
}
#[derive(RustcDecodable, PartialEq, Show)]
struct BlockModel {
parent : Option<String>,
ambientocclusion: Option<bool>,
textures: Option<BTreeMap<String, String>>,
elements: Option<Vec<Element>>,
}
fn main() {
let path = Path::new("src/bin/block");
let mut n = 0;
for p in walk_dir(&path).unwrap() {
let mut file = File::open(&p).unwrap();
let body = Json::from_reader(&mut file).unwrap();
let mut dec = json::Decoder::new(body);
let bm: BlockModel = Decodable::decode(&mut dec).unwrap();
// Use bm here
n += 1;
}
println!("Read {} files.", n);
}This thing, seems huge but it's mostly struct definitions, with optional fields mostly. It reads all files inside assets/minecraft/models/block (assuming they are inside src/bin/block and counts them.
Of course it lacks the real logic so it's not usable with the graphics code but still it's way easier to understand. Here is the real thing.
Let me know what you think.