From 42f4c1c75ebfa6922a88b5aa5341d3aff84811b3 Mon Sep 17 00:00:00 2001
From: SHAM-DP <s.srishamharan@digipen.edu>
Date: Fri, 24 Feb 2023 20:21:09 +0800
Subject: [PATCH] Aspect Ratio WIP

---
 .../ViewportWindow/SHEditorViewport.cpp       | 74 ++++++++++++++++++-
 .../ViewportWindow/SHEditorViewport.h         | 13 +++-
 2 files changed, 84 insertions(+), 3 deletions(-)

diff --git a/SHADE_Engine/src/Editor/EditorWindow/ViewportWindow/SHEditorViewport.cpp b/SHADE_Engine/src/Editor/EditorWindow/ViewportWindow/SHEditorViewport.cpp
index 8c32b1c5..7ea4d799 100644
--- a/SHADE_Engine/src/Editor/EditorWindow/ViewportWindow/SHEditorViewport.cpp
+++ b/SHADE_Engine/src/Editor/EditorWindow/ViewportWindow/SHEditorViewport.cpp
@@ -59,7 +59,7 @@ namespace SHADE
     camSystem->UpdateEditorArm(SHFrameRateController::GetRawDeltaTime(), shouldUpdateCamArm, targetPos);
 
     ImGui::PushStyleVar(ImGuiStyleVar_WindowPadding, ImVec2(0.0f, 0.0f));
-
+    
     if (Begin())
     {
       ImGuizmo::SetDrawlist();
@@ -121,12 +121,22 @@ namespace SHADE
 
     //auto pos = ImGui::GetCursorPos();
     //windowCursorPos = {}
+
     if (beginContentRegionAvailable.x == 0 || beginContentRegionAvailable.y == 0)
     {
       beginContentRegionAvailable = windowSize;
     }
-    gfxSystem->PrepareResize(static_cast<uint32_t>(beginContentRegionAvailable.x), static_cast<uint32_t>(beginContentRegionAvailable.y));
+
+    //beginContentRegionAvailable = CalculateWindowSize(beginContentRegionAvailable);
+    SHVec2 viewportSize = CalculateWindowSize(beginContentRegionAvailable);
+    gfxSystem->PrepareResize(static_cast<uint32_t>(viewportSize.x), static_cast<uint32_t>(viewportSize.y));
     shouldUpdateCamera = true;
+    //if (aspectRatio != AspectRatio::FREE && (ImGui::IsMouseDown(ImGuiMouseButton_Left) || ImGui::IsMouseReleased(ImGuiMouseButton_Left)))
+    //{
+    //  windowSize = CalculateWindowSize(windowSize);
+    //  beginContentRegionAvailable = CalculateWindowSize(beginContentRegionAvailable);
+    //  ImGui::SetWindowSize(windowName.data(), CalculateWindowSize(windowSize));
+    //}
   }
 
   void SHEditorViewport::OnPosChange()
@@ -194,13 +204,73 @@ namespace SHADE
         ImGui::PopStyleColor();
       ImGui::EndDisabled();
 
+      //TODO: Shift to constructor
+      auto arRTTRtype = rttr::type::get<SHEditorViewport::AspectRatio>();
+      auto enumAlign = arRTTRtype.get_enumeration();
+      auto names = enumAlign.get_names();
+      std::vector<const char*> arNames;
+      for (auto const& name : names)
+      {
+        arNames.push_back(name.data());
+      }
+      int currentAR = static_cast<int>(aspectRatio);
+      ImGui::SetNextItemWidth(80.0f);
+      if (ImGui::Combo("Aspect Ratio", &currentAR, arNames.data(), arNames.size()))
+      {
+        aspectRatio = static_cast<AspectRatio>(currentAR);
+        windowSize = CalculateWindowSize(windowSize);
+        ImGui::SetWindowSize(windowSize);
+        //beginContentRegionAvailable = CalculateWindowSize(beginContentRegionAvailable);
+        //OnResize();
+      }
+
       auto camSystem = SHSystemManager::GetSystem<SHCameraSystem>();
       auto editorCamera = camSystem->GetEditorCamera();
       //ImGui::SetNextItemWidth(10.0f);
       SHEditorWidgets::SliderFloat("CamSpeed", 0.0f, 5.0f, [editorCamera] {return editorCamera->movementSpeed; }, [editorCamera](float const& value) {editorCamera->movementSpeed = value; });
       SHEditorWidgets::DragVec3("TurnSpeed", { "X", "Y", "Z" }, [editorCamera] {return editorCamera->turnSpeed; }, [editorCamera](SHVec3 const& value) {editorCamera->turnSpeed = value; });
 
+      //if(ImGui::BeginCombo("Aspect Ratio", arNames[(uint8_t)aspectRatio].data()))
+      //{
+      //  auto nameIt = names.begin();
+      //  auto valueIt = values.end();
+      //  while(nameIt != names.end() && valueIt != values.end())
+      //  {
+      //    if ImGui::Beg
+      //  }
+      //}
+
       ImGui::EndMenuBar();
     }
   }
+
+  SHVec2 SHEditorViewport::CalculateWindowSize(SHVec2 const& rhs) noexcept
+{
+    switch (aspectRatio)
+    {
+    case SHADE::SHEditorViewport::AspectRatio::FREE:
+      return rhs;
+    case SHADE::SHEditorViewport::AspectRatio::AR16_9:
+      return SHVec2(rhs.x, rhs.x * 0.5625f);
+    case SHADE::SHEditorViewport::AspectRatio::AR21_9:
+      return SHVec2(rhs.x, rhs.x * 0.42857f);
+    case SHADE::SHEditorViewport::AspectRatio::AR21_10:
+      return SHVec2(rhs.x, rhs.x * 0.47619f);
+    default:
+      return rhs;
+    }
+  }
+
 }//namespace SHADE
+
+RTTR_REGISTRATION
+{
+  using namespace rttr;
+  using namespace SHADE;
+  registration::enumeration<SHEditorViewport::AspectRatio>("AspectRatio")(
+    value("FREE", SHEditorViewport::AspectRatio::FREE),
+    value("16:9", SHEditorViewport::AspectRatio::AR16_9),
+    value("21:9", SHEditorViewport::AspectRatio::AR21_9),
+    value("21:10", SHEditorViewport::AspectRatio::AR21_10)
+    );
+}
diff --git a/SHADE_Engine/src/Editor/EditorWindow/ViewportWindow/SHEditorViewport.h b/SHADE_Engine/src/Editor/EditorWindow/ViewportWindow/SHEditorViewport.h
index 8f49c514..d7fb0f39 100644
--- a/SHADE_Engine/src/Editor/EditorWindow/ViewportWindow/SHEditorViewport.h
+++ b/SHADE_Engine/src/Editor/EditorWindow/ViewportWindow/SHEditorViewport.h
@@ -16,7 +16,15 @@ namespace SHADE
 {
   class SHEditorViewport final : public SHEditorWindow
   {
+
   public:
+    enum class AspectRatio : uint8_t
+    {
+      FREE,
+      AR16_9,
+      AR21_9,
+      AR21_10
+    };
     SHEditorViewport();
     void Init() override;
     void Update() override;
@@ -27,9 +35,12 @@ namespace SHADE
     void OnPosChange() override;
   private:
     void DrawMenuBar() noexcept;
-    SHVec2 beginCursorPos;
+    SHVec2 CalculateWindowSize(SHVec2 const& rhs) noexcept;
+
     bool shouldUpdateCamera = false;
     bool shouldUpdateCamArm = false;
+    AspectRatio aspectRatio {AspectRatio::FREE};
+    SHVec2 beginCursorPos;
     SHVec3 targetPos;
   };//class SHEditorViewport
 }//namespace SHADE