From e5cc9de4866e6d96a8395a8a0d3d5c9e7a6cd223 Mon Sep 17 00:00:00 2001
From: fallenoak <git@fallenoak.me>
Date: Wed, 18 Feb 2026 19:34:52 -0600
Subject: [PATCH] feat(ui): add CGWorldFrame::OnFrameSizeChanged

---
 src/ui/game/CGWorldFrame.cpp | 29 +++++++++++++++++++++++++++++
 src/ui/game/CGWorldFrame.hpp | 13 +++++++++++++
 2 files changed, 42 insertions(+)

diff --git a/src/ui/game/CGWorldFrame.cpp b/src/ui/game/CGWorldFrame.cpp
index 3446f1b..fab12fd 100644
--- a/src/ui/game/CGWorldFrame.cpp
+++ b/src/ui/game/CGWorldFrame.cpp
@@ -1,6 +1,8 @@
 #include "ui/game/CGWorldFrame.hpp"
+#include "gx/Coordinate.hpp"
 #include "gx/Shader.hpp"
 #include "gx/Transform.hpp"
+#include "ui/game/CGCamera.hpp"
 #include "ui/game/PlayerName.hpp"
 #include <storm/Memory.hpp>
 #include <tempest/Matrix.hpp>
@@ -46,6 +48,10 @@ CGWorldFrame::CGWorldFrame(CSimpleFrame* parent) : CSimpleFrame(parent) {
     this->EnableEvent(SIMPLE_EVENT_MOUSEWHEEL, -1);
 
     // TODO
+
+    this->m_camera = STORM_NEW(CGCamera);
+
+    // TODO
 }
 
 void CGWorldFrame::OnFrameRender(CRenderBatch* batch, uint32_t layer) {
@@ -56,6 +62,29 @@ void CGWorldFrame::OnFrameRender(CRenderBatch* batch, uint32_t layer) {
     }
 }
 
+void CGWorldFrame::OnFrameSizeChanged(const CRect& rect) {
+    this->CSimpleFrame::OnFrameSizeChanged(rect);
+
+    // Screen rect (DDC)
+    this->m_screenRect.minX = std::max(this->m_rect.minX, 0.0f);
+    this->m_screenRect.minY = std::max(this->m_rect.minY, 0.0f);
+    this->m_screenRect.maxX = std::min(this->m_rect.maxX, NDCToDDCWidth(1.0f));
+    this->m_screenRect.maxY = std::min(this->m_rect.maxY, NDCToDDCHeight(1.0f));
+
+    // Camera aspect ratio
+    if (this->m_camera) {
+        this->m_camera->SetScreenAspect(this->m_screenRect);
+    }
+
+    // Viewport (NDC)
+    DDCToNDC(this->m_rect.minX, this->m_rect.minY, &this->m_viewport.minX, &this->m_viewport.minY);
+    DDCToNDC(this->m_rect.maxX, this->m_rect.maxY, &this->m_viewport.maxX, &this->m_viewport.maxY);
+    this->m_viewport.minX = std::max(this->m_viewport.minX, 0.0f);
+    this->m_viewport.minY = std::max(this->m_viewport.minY, 0.0f);
+    this->m_viewport.maxX = std::min(this->m_viewport.maxX, 1.0f);
+    this->m_viewport.maxY = std::min(this->m_viewport.maxY, 1.0f);
+}
+
 void CGWorldFrame::OnWorldRender() {
     // TODO
 }
diff --git a/src/ui/game/CGWorldFrame.hpp b/src/ui/game/CGWorldFrame.hpp
index 6cec83a..169940c 100644
--- a/src/ui/game/CGWorldFrame.hpp
+++ b/src/ui/game/CGWorldFrame.hpp
@@ -4,6 +4,8 @@
 #include "ui/simple/CSimpleFrame.hpp"
 #include <cstdint>
 
+class CGCamera;
+
 class CGWorldFrame : public CSimpleFrame {
     public:
         // Static variables
@@ -15,11 +17,22 @@ class CGWorldFrame : public CSimpleFrame {
 
         // Virtual member functions
         virtual void OnFrameRender(CRenderBatch* batch, uint32_t layer);
+        // TODO
+        virtual void OnFrameSizeChanged(const CRect& rect);
 
         // Member functions
         CGWorldFrame(CSimpleFrame* parent);
         void OnWorldRender();
         void OnWorldUpdate();
+
+    private:
+        // Private member variables
+        // TODO
+        CRect m_screenRect;
+        CRect m_viewport;
+        // TODO
+        CGCamera* m_camera;
+        // TODO
 };
 
 #endif