From 2e947ab85ac8227f22e46ec1b2fb8d5099044329 Mon Sep 17 00:00:00 2001
From: Wojtek Figat <wojtek@figat.pl>
Date: Mon, 4 Jul 2022 20:35:29 +0200
Subject: [PATCH] Fixes for large worlds

---
 Source/Editor/ViewportDebugDrawData.cs | 2 +-
 Source/Engine/Content/Assets/Model.cpp | 2 +-
 Source/Engine/UI/SpriteRender.cpp      | 7 +++----
 3 files changed, 5 insertions(+), 6 deletions(-)

diff --git a/Source/Editor/ViewportDebugDrawData.cs b/Source/Editor/ViewportDebugDrawData.cs
index 3c39534d1..a983af168 100644
--- a/Source/Editor/ViewportDebugDrawData.cs
+++ b/Source/Editor/ViewportDebugDrawData.cs
@@ -113,7 +113,7 @@ namespace FlaxEditor
                     var bounds = BoundingSphere.FromBox(staticModel.Box);
 
                     // Pick a proper LOD
-                    var center = (Float3)bounds.Center; // TODO: large-worlds
+                    Float3 center = bounds.Center - renderContext.View.Origin;
                     int lodIndex = RenderTools.ComputeModelLOD(model, ref center, (float)bounds.Radius, ref renderContext);
                     var lods = model.LODs;
                     if (lods == null || lods.Length < lodIndex || lodIndex < 0)
diff --git a/Source/Engine/Content/Assets/Model.cpp b/Source/Engine/Content/Assets/Model.cpp
index 11ccd841a..870d359de 100644
--- a/Source/Engine/Content/Assets/Model.cpp
+++ b/Source/Engine/Content/Assets/Model.cpp
@@ -196,7 +196,7 @@ void Model::Draw(const RenderContext& renderContext, MaterialBase* material, con
     const BoundingBox box = GetBox(world);
     BoundingSphere sphere;
     BoundingSphere::FromBox(box, sphere);
-    int32 lodIndex = RenderTools::ComputeModelLOD(this, sphere.Center, (float)sphere.Radius, renderContext); // TODO: large-worlds
+    int32 lodIndex = RenderTools::ComputeModelLOD(this, sphere.Center - renderContext.View.Origin, (float)sphere.Radius, renderContext);
     if (lodIndex == -1)
         return;
     lodIndex += renderContext.View.ModelLODBias;
diff --git a/Source/Engine/UI/SpriteRender.cpp b/Source/Engine/UI/SpriteRender.cpp
index e5ece58fc..e5a70cc89 100644
--- a/Source/Engine/UI/SpriteRender.cpp
+++ b/Source/Engine/UI/SpriteRender.cpp
@@ -113,22 +113,21 @@ void SpriteRender::Draw(RenderContext& renderContext)
     auto model = _quadModel.As<Model>();
     if (model->GetLoadedLODs() == 0)
         return;
-    auto& view = renderContext.View;
+    const auto& view = renderContext.View;
     Matrix m1, m2, m3, world;
     Matrix::Scaling(_size.X, _size.Y, 1.0f, m2);
     Matrix::RotationY(PI, m3);
     Matrix::Multiply(m2, m3, m1);
-    // TODO: large-worlds
     if (FaceCamera)
     {
-        Matrix::Billboard(_transform.Translation, view.Position, Vector3::Up, view.Direction, m2);
+        Matrix::Billboard(_transform.Translation - view.Origin, view.Position, Vector3::Up, view.Direction, m2);
         Matrix::Multiply(m1, m2, m3);
         Matrix::Scaling(_transform.Scale, m1);
         Matrix::Multiply(m1, m3, world);
     }
     else
     {
-        _transform.GetWorld(m2);
+        view.GetWorldMatrix(_transform, m2);
         Matrix::Multiply(m1, m2, world);
     }
     model->LODs[0].Draw(renderContext, _materialInstance, world, GetStaticFlags(), false, DrawModes, GetPerInstanceRandom());