From 7b0edcfc6a07ff4d64e602f2b68d93fedc8b826d Mon Sep 17 00:00:00 2001
From: HampusM <hampus@hampusmat.com>
Date: Sun, 2 Aug 2026 16:11:30 +0200
Subject: fix(engine): improve portability by making matrices row-major

---
 engine/src/rendering/backend/opengl.rs | 37 +++++++++++++---------------------
 engine/src/rendering/shader.rs         |  5 ++---
 2 files changed, 16 insertions(+), 26 deletions(-)

(limited to 'engine/src/rendering')

diff --git a/engine/src/rendering/backend/opengl.rs b/engine/src/rendering/backend/opengl.rs
index 1253c7b..f88fe38 100644
--- a/engine/src/rendering/backend/opengl.rs
+++ b/engine/src/rendering/backend/opengl.rs
@@ -76,7 +76,6 @@ use crate::ecs::query::term::Without;
 use crate::ecs::sole::Single;
 use crate::ecs::{Component, Query, Sole};
 use crate::image::{ColorType as ImageColorType, Image};
-use crate::matrix::Matrix;
 use crate::reflection::EnumReflectionExt;
 use crate::rendering::backend::opengl::glutin_compat::{
     DisplayBuilder,
@@ -187,16 +186,14 @@ impl crate::ecs::extension::Extension for Extension
 }
 
 fn prepare_windows(
-    window_query: Query<
-        (
-            Option<&Window>,
-            &mut WindowCreationAttributes,
-            With<TargetWindow>,
-            Without<CreationReady>,
-            Without<WindowGlConfig>,
-            Without<WindowClosed>,
-        ),
-    >,
+    window_query: Query<(
+        Option<&Window>,
+        &mut WindowCreationAttributes,
+        With<TargetWindow>,
+        Without<CreationReady>,
+        Without<WindowGlConfig>,
+        Without<WindowClosed>,
+    )>,
     windowing_context: Single<WindowingContext>,
     graphics_props: Single<GraphicsProperties>,
     mut actions: Actions,
@@ -272,9 +269,12 @@ fn prepare_windows(
 
 #[tracing::instrument(skip_all)]
 fn init_window_graphics(
-    window_query: Query<
-        (&Window, &WindowGlConfig, With<TargetWindow>, Without<SurfaceSpec>),
-    >,
+    window_query: Query<(
+        &Window,
+        &WindowGlConfig,
+        With<TargetWindow>,
+        Without<SurfaceSpec>,
+    )>,
     windowing_context: Single<WindowingContext>,
     graphics_props: Single<GraphicsProperties>,
     mut graphics_ctx: Single<GraphicsContext>,
@@ -1485,15 +1485,6 @@ impl<Value: ReprC + IntoBytes + Copy> From<Vec3<Value>>
     }
 }
 
-impl<Value: ReprC + Copy> From<Matrix<Value, 4, 4>>
-    for opengl_bindings::data_types::Matrix<Value, 4, 4>
-{
-    fn from(matrix: Matrix<Value, 4, 4>) -> Self
-    {
-        Self { items: matrix.items }
-    }
-}
-
 impl<Value: Copy> From<Dimens<Value>> for opengl_bindings::data_types::Dimens<Value>
 {
     fn from(dimens: Dimens<Value>) -> Self
diff --git a/engine/src/rendering/shader.rs b/engine/src/rendering/shader.rs
index 7d5bd51..b508670 100644
--- a/engine/src/rendering/shader.rs
+++ b/engine/src/rendering/shader.rs
@@ -28,12 +28,11 @@ use crate::asset::{
     Submitter as AssetSubmitter,
     HANDLE_ASSETS_PHASE,
 };
-use crate::ecs::pair;
 use crate::builder;
 use crate::ecs::pair::ChildOf;
 use crate::ecs::phase::{Phase, POST_UPDATE as POST_UPDATE_PHASE};
 use crate::ecs::sole::Single;
-use crate::ecs::{declare_entity, Component, Sole};
+use crate::ecs::{declare_entity, pair, Component, Sole};
 
 pub mod cursor;
 pub mod default;
@@ -1018,7 +1017,7 @@ pub(super) fn prepare(collector: &mut crate::ecs::extension::Collector<'_>)
 
     let session_options = shader_slang::CompilerOptions::default()
         .optimization(shader_slang::OptimizationLevel::None)
-        .matrix_layout_column(true)
+        .matrix_layout_row(true)
         .debug_information(SlangDebugInfoLevel::Maximal)
         .no_mangle(true);
 
-- 
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