From dd4f81a73c2ed2fb262902209341a53951c6b059 Mon Sep 17 00:00:00 2001
From: Quaternions <krakow20@gmail.com>
Date: Wed, 5 Feb 2025 14:48:12 -0800
Subject: [PATCH] transform normals

---
 lib/bsp_loader/src/brush.rs | 4 ++--
 lib/bsp_loader/src/lib.rs   | 3 +++
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/lib/bsp_loader/src/brush.rs b/lib/bsp_loader/src/brush.rs
index 8d7c0408..1a0c6d95 100644
--- a/lib/bsp_loader/src/brush.rs
+++ b/lib/bsp_loader/src/brush.rs
@@ -2,7 +2,7 @@ use strafesnet_common::integer::Planar64;
 use strafesnet_common::{model,integer};
 use strafesnet_common::integer::{vec3::Vector3,Fixed,Ratio};
 
-use crate::valve_transform_dist;
+use crate::{valve_transform_normal,valve_transform_dist};
 
 #[derive(Hash,Eq,PartialEq)]
 struct Face{
@@ -202,7 +202,7 @@ pub fn brush_to_mesh(bsp:&vbsp::Bsp,brush:&vbsp::Brush)->Result<model::Mesh,Brus
 	let face_list=sides.iter().map(|side|{
 		let plane=bsp.plane(side.plane as usize)?;
 		Some(Face{
-			normal:strafesnet_common::integer::vec3::try_from_f32_array(plane.normal.into()).unwrap(),
+			normal:valve_transform_normal(plane.normal.into()),
 			dot:valve_transform_dist(plane.dist.into()),
 		})
 	}).collect::<Option<std::collections::HashSet<_>>>().ok_or(BrushToMeshError::MissingPlane)?;
diff --git a/lib/bsp_loader/src/lib.rs b/lib/bsp_loader/src/lib.rs
index 746224f5..6774ccc0 100644
--- a/lib/bsp_loader/src/lib.rs
+++ b/lib/bsp_loader/src/lib.rs
@@ -9,6 +9,9 @@ const VALVE_SCALE:f32=1.0/16.0;
 pub(crate) fn valve_transform_dist(d:f32)->strafesnet_common::integer::Planar64{
 	(d*VALVE_SCALE).try_into().unwrap()
 }
+pub(crate) fn valve_transform_normal([x,y,z]:[f32;3])->strafesnet_common::integer::Planar64Vec3{
+	strafesnet_common::integer::vec3::try_from_f32_array([x,z,-y]).unwrap()
+}
 pub(crate) fn valve_transform([x,y,z]:[f32;3])->strafesnet_common::integer::Planar64Vec3{
 	strafesnet_common::integer::vec3::try_from_f32_array([x*VALVE_SCALE,z*VALVE_SCALE,-y*VALVE_SCALE]).unwrap()
 }