From 65b75814ab9de5b3667324dc01f53a7224a5ee37 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ricardo=20Lu=C3=ADs=20Vaz=20Silva?= <ricolvs123@gmail.com>
Date: Sun, 26 Jan 2025 20:10:35 -0300
Subject: [PATCH] update walls on texZ change

---
 src/gamedata/r_defs.h                       | 10 +---------
 src/levelmeshhelper.cpp                     |  6 ++++++
 src/levelmeshhelper.h                       |  2 ++
 src/rendering/hwrenderer/doom_levelmesh.cpp | 12 ++++++++++++
 src/rendering/hwrenderer/doom_levelmesh.h   |  1 +
 5 files changed, 22 insertions(+), 9 deletions(-)

diff --git a/src/gamedata/r_defs.h b/src/gamedata/r_defs.h
index b94ec5cc3..b93ef24ff 100644
--- a/src/gamedata/r_defs.h
+++ b/src/gamedata/r_defs.h
@@ -1008,15 +1008,7 @@ public:
 
 		if (val != old)
 		{
-			//not sure actually what TexZ does, so changing passing this as "Other"
-			if(pos)
-			{
-				LevelMeshUpdater->SectorChangedOther(this);
-			}
-			else
-			{
-				LevelMeshUpdater->SectorChangedOther(this);
-			}
+			LevelMeshUpdater->SectorChangedTexZ(this);
 		}
 	}
 
diff --git a/src/levelmeshhelper.cpp b/src/levelmeshhelper.cpp
index dbe7f3a31..b798bd7cd 100644
--- a/src/levelmeshhelper.cpp
+++ b/src/levelmeshhelper.cpp
@@ -49,6 +49,11 @@ void UpdateLevelMesh::SectorChangedOther(sector_t* sector)
 	PropagateCorrelations(this, &UpdateLevelMesh::OnSectorChangedOther, sector);
 }
 
+void UpdateLevelMesh::SectorChangedTexZ(sector_t* sector)
+{
+	PropagateCorrelations(this, &UpdateLevelMesh::OnSectorChangedTexZ, sector);
+}
+
 void UpdateLevelMesh::SideTextureChanged(side_t* side, int section)
 {
 	OnSideTextureChanged(side, section);
@@ -98,6 +103,7 @@ struct NullLevelMeshUpdater : UpdateLevelMesh
 	void OnCeilingTextureChanged(sector_t* sector) override {}
 
 	void OnSectorChangedOther(sector_t* sector) override {}
+	void OnSectorChangedTexZ(sector_t* sector) override {}
 
 	void OnSideTextureChanged(side_t* side, int section) override {}
 	void OnSideDecalsChanged(side_t* side) override {}
diff --git a/src/levelmeshhelper.h b/src/levelmeshhelper.h
index 89611cfca..6698f1ffe 100644
--- a/src/levelmeshhelper.h
+++ b/src/levelmeshhelper.h
@@ -17,6 +17,7 @@ struct UpdateLevelMesh
 	void CeilingTextureChanged(sector_t *sector);
 
 	void SectorChangedOther(sector_t *sector);
+	void SectorChangedTexZ(sector_t *sector);
 
 	void SideTextureChanged(side_t *side, int section);
 	void SideDecalsChanged(side_t* side);
@@ -34,6 +35,7 @@ struct UpdateLevelMesh
 	virtual void OnCeilingTextureChanged(sector_t *sector) = 0;
 
 	virtual void OnSectorChangedOther(sector_t *sector) = 0;
+	virtual void OnSectorChangedTexZ(sector_t *sector) = 0;
 
 	virtual void OnSideTextureChanged(side_t *side, int section) = 0;
 	virtual void OnSideDecalsChanged(side_t* side) = 0;
diff --git a/src/rendering/hwrenderer/doom_levelmesh.cpp b/src/rendering/hwrenderer/doom_levelmesh.cpp
index d7ee8d2f7..d559ee249 100644
--- a/src/rendering/hwrenderer/doom_levelmesh.cpp
+++ b/src/rendering/hwrenderer/doom_levelmesh.cpp
@@ -626,6 +626,18 @@ void DoomLevelMesh::OnSectorChangedOther(sector_t* sector)
 	UpdateFlat(sector->Index(), SurfaceUpdateType::Full);
 }
 
+void DoomLevelMesh::OnSectorChangedTexZ(sector_t* sector)
+{
+	UpdateFlat(sector->Index(), SurfaceUpdateType::Full);
+	for (line_t* line : sector->Lines)
+	{
+		if (line->sidedef[0])
+			UpdateSide(line->sidedef[0]->Index(), SurfaceUpdateType::Full);
+		else if (line->sidedef[1])
+			UpdateSide(line->sidedef[1]->Index(), SurfaceUpdateType::Full);
+	}
+}
+
 void DoomLevelMesh::OnSideTextureChanged(side_t* side, int section)
 {
 	UpdateSide(side->Index(), SurfaceUpdateType::Full);
diff --git a/src/rendering/hwrenderer/doom_levelmesh.h b/src/rendering/hwrenderer/doom_levelmesh.h
index f569e27a2..8cbc0b63f 100644
--- a/src/rendering/hwrenderer/doom_levelmesh.h
+++ b/src/rendering/hwrenderer/doom_levelmesh.h
@@ -120,6 +120,7 @@ public:
 	void OnFloorTextureChanged(sector_t* sector) override;
 	void OnCeilingTextureChanged(sector_t* sector) override;
 	void OnSectorChangedOther(sector_t* sector) override;
+	void OnSectorChangedTexZ(sector_t* sector) override;
 	void OnSideTextureChanged(side_t* side, int section) override;
 	void OnSideDecalsChanged(side_t* side) override;
 	void OnSectorLightChanged(sector_t* sector) override;