From 1ca762dedcdd6c87086560dd56ab3566b08243d0 Mon Sep 17 00:00:00 2001
From: metamuffin <metamuffin@disroot.org>
Date: Fri, 17 Jan 2025 19:27:27 +0100
Subject: remove --z-up flag and fix inherited transform

---
 world/src/main.rs | 49 ++++++++++++++++++++++++++++++++++++++-----------
 1 file changed, 38 insertions(+), 11 deletions(-)

(limited to 'world/src/main.rs')

diff --git a/world/src/main.rs b/world/src/main.rs
index c32b810..8535490 100644
--- a/world/src/main.rs
+++ b/world/src/main.rs
@@ -18,16 +18,16 @@
 pub mod mesh;
 pub mod physics;
 
-use anyhow::Result;
+use anyhow::{Result, anyhow};
 use clap::Parser;
-use gltf::{Gltf, image::Source, import_buffers};
+use gltf::{Gltf, Node, image::Source, import_buffers, scene::Transform};
 use humansize::BINARY;
 use image::{ImageReader, codecs::webp::WebPEncoder};
 use log::{debug, info};
 use mesh::import_mesh;
 use physics::import_physics;
 use rand::random;
-use rayon::iter::{ParallelBridge, ParallelIterator};
+use rayon::iter::{IntoParallelRefIterator, ParallelIterator};
 use std::{
     borrow::Cow,
     collections::HashMap,
@@ -41,7 +41,7 @@ use std::{
     time::Duration,
 };
 use weareshared::{
-    Vec3A,
+    Affine3A, Vec3A,
     helper::ReadWrite,
     packets::{Data, Object, Packet, Resource},
     resources::{EnvironmentPart, Image, LightPart, Prefab},
@@ -78,8 +78,6 @@ pub struct Args {
     #[arg(short, long)]
     scale: Option<f32>,
     #[arg(short, long)]
-    z_up: bool,
-    #[arg(short, long)]
     dry_run: bool,
 }
 
@@ -92,20 +90,39 @@ fn main() -> Result<()> {
     let mut prefabs = Vec::new();
     let texture_cache = Arc::new(Mutex::new(HashMap::new()));
 
+    let mut root_affine = Affine3A::IDENTITY;
+    root_affine.matrix3 *= args.scale.unwrap_or(1.);
+    root_affine.translation *= args.scale.unwrap_or(1.);
+
     for scenepath in &args.scene {
         let path_base = scenepath.parent().unwrap();
         let mut gltf = Gltf::from_reader_without_validation(File::open(scenepath)?)?;
         let blob = gltf.blob.take();
         let buffers = import_buffers(&gltf, Some(path_base), blob)?;
 
-        let mut prefab = gltf
-            .nodes()
-            .par_bridge()
-            .map(|node| {
+        let root = gltf.default_scene().ok_or(anyhow!("no default scene"))?;
+
+        let mut nodes = Vec::new();
+        fn traverse<'a>(out: &mut Vec<(Affine3A, Node<'a>)>, node: Node<'a>, trans: Affine3A) {
+            let trans = trans * transform_to_affine(node.transform());
+            for c in node.children() {
+                traverse(out, c, trans);
+            }
+            out.push((trans, node));
+        }
+
+        for node in root.nodes() {
+            traverse(&mut nodes, node, root_affine);
+        }
+
+        let mut prefab = nodes
+            .par_iter()
+            .map(|(trans, node)| {
                 let mut prefab = Prefab::default();
                 if let Some(mesh) = node.mesh() {
                     import_mesh(
                         mesh,
+                        *trans,
                         &buffers,
                         &store,
                         path_base,
@@ -136,7 +153,7 @@ fn main() -> Result<()> {
                         })?,
                     ));
                 }
-                import_physics(&gltf, &node, &mut prefab, &store, &buffers, &args)?;
+                import_physics(&gltf, *trans, &node, &mut prefab, &store, &buffers)?;
                 Ok::<_, anyhow::Error>(prefab)
             })
             .reduce(
@@ -311,3 +328,13 @@ fn load_texture(
     }
     Ok(res)
 }
+
+pub fn transform_to_affine(trans: Transform) -> Affine3A {
+    let mat = trans.matrix();
+    Affine3A::from_cols_array_2d(&[
+        [mat[0][0], mat[0][1], mat[0][2]],
+        [mat[1][0], mat[1][1], mat[1][2]],
+        [mat[2][0], mat[2][1], mat[2][2]],
+        [mat[3][0], mat[3][1], mat[3][2]],
+    ])
+}
-- 
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