fix(engine): make textures not flipped

1 files changed, 39 insertions, 3 deletions

diff --git a/engine/src/model/asset.rs b/engine/src/model/asset.rs
index 69a06aa..5487203 100644
--- a/engine/src/model/asset.rs
+++ b/engine/src/model/asset.rs
@@ -7,7 +7,35 @@ use crate::model::{Materials, Spec};
 
 #[derive(Debug, Clone)]
 #[non_exhaustive]
-pub struct Settings {}
+pub struct Settings
+{
+    /// Whether all UVs should be flipped on the Y axis. This is necessary if the UVs
+    /// have their origin at the bottom left corner of the image
+    ///
+    /// The default is `true`.
+    pub y_flip_uvs: bool,
+}
+
+impl Settings
+{
+    /// Whether all UVs should be flipped on the Y axis. This is necessary if the UVs have
+    /// their origin at the bottom left corner of the image
+    ///
+    /// The default is `true`.
+    pub fn y_flip_uvs(mut self, y_flip_uvs: bool) -> Self
+    {
+        self.y_flip_uvs = y_flip_uvs;
+        self
+    }
+}
+
+impl Default for Settings
+{
+    fn default() -> Self
+    {
+        Self { y_flip_uvs: true }
+    }
+}
 
 pub fn add_importers(assets: &mut Assets)
 {
@@ -17,9 +45,14 @@ pub fn add_importers(assets: &mut Assets)
 fn import_wavefront_obj_asset(
     asset_submitter: &mut AssetSubmitter<'_>,
     path: &Path,
-    _settings: Option<&'_ Settings>,
+    settings: Option<&Settings>,
 ) -> Result<(), Error>
 {
+    let settings = match settings {
+        Some(settings) => settings,
+        None => &Settings::default(),
+    };
+
     let parent_path = path
         .parent()
         .ok_or_else(|| Error::InvalidPath(path.to_path_buf()))?;
@@ -29,7 +62,10 @@ fn import_wavefront_obj_asset(
             .map_err(|err| Error::ReadFailed(err, path.to_path_buf()))?,
     )?;
 
-    let mesh = obj.to_mesh()?;
+    let mesh = obj.to_mesh(
+        crate::file_format::wavefront::obj::ToMeshOptions::default()
+            .y_flip_uvs(settings.y_flip_uvs),
+    )?;
 
     let mesh_asset = asset_submitter.submit_store_named("mesh", mesh);