From 7a73dbd49d19ec2c7917eee41ae43bee2a408bc2 Mon Sep 17 00:00:00 2001
From: Stanislav Denisov <nxrighthere@gmail.com>
Date: Tue, 10 Mar 2026 16:29:18 +0100
Subject: [PATCH] Implement mesh recenter to top (#1585)

* Implement mesh recenter to top

* Fix downstream error
---
 Editor/MeshWindow.cpp               |  9 +++++++++
 Editor/MeshWindow.h                 |  1 +
 WickedEngine/wiScene_Components.cpp | 14 ++++++++++++++
 WickedEngine/wiScene_Components.h   |  1 +
 4 files changed, 25 insertions(+)

diff --git a/Editor/MeshWindow.cpp b/Editor/MeshWindow.cpp
index f1d61769a..72f78989f 100644
--- a/Editor/MeshWindow.cpp
+++ b/Editor/MeshWindow.cpp
@@ -327,6 +327,14 @@ void MeshWindow::Create(EditorComponent* _editor)
 	}));
 	AddWidget(&recenterButton);
 
+	recenterToTopButton.Create("Recenter to Top");
+	recenterToTopButton.SetTooltip("Recenter mesh to AABB top.");
+	recenterToTopButton.OnClick(changeSelectedMesh([this] (auto mesh) {
+		mesh->RecenterToTop();
+		UpdateRecenterInputs(mesh->aabb.getCenter());
+	}));
+	AddWidget(&recenterToTopButton);
+
 	recenterToBottomButton.Create("Recenter to Bottom");
 	recenterToBottomButton.SetTooltip("Recenter mesh to AABB bottom.");
 	recenterToBottomButton.OnClick(changeSelectedMesh([this] (auto mesh) {
@@ -1196,6 +1204,7 @@ void MeshWindow::ResizeLayout()
 	layout.add_fullwidth(computeNormalsSmoothButton);
 	layout.add_fullwidth(computeNormalsHardButton);
 	layout.add_fullwidth(recenterButton);
+	layout.add_fullwidth(recenterToTopButton);
 	layout.add_fullwidth(recenterToBottomButton);
 
 	const float safe_width = layout.width - 100 - layout.padding;
diff --git a/Editor/MeshWindow.h b/Editor/MeshWindow.h
index 5f3f7c8df..cf0ff3c74 100644
--- a/Editor/MeshWindow.h
+++ b/Editor/MeshWindow.h
@@ -30,6 +30,7 @@ public:
 	wi::gui::Button computeNormalsSmoothButton;
 	wi::gui::Button computeNormalsHardButton;
 	wi::gui::Button recenterButton;
+	wi::gui::Button recenterToTopButton;
 	wi::gui::Button recenterToBottomButton;
 	wi::gui::TextInputField recenterToXInput;
 	wi::gui::TextInputField recenterToYInput;
diff --git a/WickedEngine/wiScene_Components.cpp b/WickedEngine/wiScene_Components.cpp
index 1dd80e5dc..f6b63a363 100644
--- a/WickedEngine/wiScene_Components.cpp
+++ b/WickedEngine/wiScene_Components.cpp
@@ -1962,6 +1962,20 @@ namespace wi::scene
 
 		CreateRenderData();
 	}
+	void MeshComponent::RecenterToTop()
+	{
+		XMFLOAT3 center = aabb.getCenter();
+		center.y += aabb.getHalfWidth().y;
+
+		for (auto& pos : vertex_positions)
+		{
+			pos.x -= center.x;
+			pos.y -= center.y;
+			pos.z -= center.z;
+		}
+
+		CreateRenderData();
+	}
 	void MeshComponent::RecenterToBottom()
 	{
 		XMFLOAT3 center = aabb.getCenter();
diff --git a/WickedEngine/wiScene_Components.h b/WickedEngine/wiScene_Components.h
index 4632ad753..22e9e096b 100644
--- a/WickedEngine/wiScene_Components.h
+++ b/WickedEngine/wiScene_Components.h
@@ -870,6 +870,7 @@ namespace wi::scene
 		void FlipCulling();
 		void FlipNormals();
 		void Recenter();
+		void RecenterToTop();
 		void RecenterToBottom();
 		void RecenterTo(float x, float y, float z);
 		wi::primitive::Sphere GetBoundingSphere() const;