feat: add scene view fly controls

editor/src/Viewport/IViewportHostService.h

@@ -33,9 +33,14 @@ struct SceneViewportInput {
     ImVec2 viewportSize = ImVec2(0.0f, 0.0f);
     ImVec2 mouseDelta = ImVec2(0.0f, 0.0f);
     float mouseWheel = 0.0f;
+    float deltaTime = 0.0f;
+    float moveForward = 0.0f;
+    float moveRight = 0.0f;
+    float moveUp = 0.0f;
     bool hovered = false;
     bool focused = false;
     bool looking = false;
+    bool fastMove = false;
     bool orbiting = false;
     bool panning = false;
     bool focusSelectionRequested = false;

editor/src/Viewport/SceneViewportCameraController.h

@@ -19,7 +19,12 @@ struct SceneViewportCameraInputState {
     float panDeltaX = 0.0f;
     float panDeltaY = 0.0f;
     float zoomDelta = 0.0f;
+    float deltaTime = 0.0f;
+    float moveForward = 0.0f;
+    float moveRight = 0.0f;
+    float moveUp = 0.0f;
     float viewportHeight = 0.0f;
+    bool fastMove = false;
 };
 
 class SceneViewportCameraController {
@@ -93,6 +98,23 @@ public:
             m_position += ((right * -input.panDeltaX) + (up * input.panDeltaY)) * worldUnitsPerPixel;
         }
 
+        if (input.deltaTime > 0.0f &&
+            (std::abs(input.moveForward) > Math::EPSILON ||
+             std::abs(input.moveRight) > Math::EPSILON ||
+             std::abs(input.moveUp) > Math::EPSILON)) {
+            const Math::Vector3 movement =
+                GetForward() * input.moveForward +
+                GetRight() * input.moveRight +
+                Math::Vector3::Up() * input.moveUp;
+            if (movement.SqrMagnitude() > Math::EPSILON) {
+                const float speedMultiplier = input.fastMove ? 4.0f : 1.0f;
+                const float flySpeed = (std::max)(5.0f, m_distance * 2.0f) * speedMultiplier;
+                const Math::Vector3 delta = Math::Vector3::Normalize(movement) * flySpeed * input.deltaTime;
+                m_position += delta;
+                m_focalPoint += delta;
+            }
+        }
+
         if (std::abs(input.zoomDelta) > Math::EPSILON) {
             const float zoomFactor = std::pow(0.85f, input.zoomDelta);
             m_distance = std::clamp(m_distance * zoomFactor, 0.5f, 500.0f);
@@ -111,7 +133,7 @@ public:
 private:
     void ApplyRotationDelta(float deltaX, float deltaY) {
         m_yawDegrees += deltaX * 0.30f;
-        m_pitchDegrees = std::clamp(m_pitchDegrees - deltaY * 0.20f, -89.0f, 89.0f);
+        m_pitchDegrees = std::clamp(m_pitchDegrees + deltaY * 0.20f, -89.0f, 89.0f);
     }
 
     Math::Vector3 GetRight() const {

editor/src/Viewport/ViewportHostService.h

@@ -91,6 +91,11 @@ public:
         SceneViewportCameraInputState controllerInput = {};
         controllerInput.viewportHeight = input.viewportSize.y;
         controllerInput.zoomDelta = input.hovered ? input.mouseWheel : 0.0f;
+        controllerInput.deltaTime = input.deltaTime;
+        controllerInput.moveForward = input.moveForward;
+        controllerInput.moveRight = input.moveRight;
+        controllerInput.moveUp = input.moveUp;
+        controllerInput.fastMove = input.fastMove;
 
         if (input.looking) {
             controllerInput.lookDeltaX = input.mouseDelta.x;

editor/src/panels/SceneViewPanel.cpp

@@ -263,15 +263,29 @@ void SceneViewPanel::Render() {
 
         SceneViewportInput input = {};
         input.viewportSize = content.availableSize;
+        input.deltaTime = io.DeltaTime;
         input.hovered = content.hovered;
         input.focused = content.focused;
-        input.mouseWheel = content.hovered ? io.MouseWheel : 0.0f;
+        input.mouseWheel = content.hovered ? -io.MouseWheel : 0.0f;
         input.looking = m_lookDragging;
         input.orbiting = m_orbitDragging;
         input.panning = m_panDragging;
+        input.fastMove = io.KeyShift;
         input.focusSelectionRequested =
             content.focused && !io.WantTextInput && ImGui::IsKeyPressed(ImGuiKey_F, false);
 
+        if (m_lookDragging && content.focused && !io.WantTextInput) {
+            input.moveForward =
+                (ImGui::IsKeyDown(ImGuiKey_W) ? 1.0f : 0.0f) -
+                (ImGui::IsKeyDown(ImGuiKey_S) ? 1.0f : 0.0f);
+            input.moveRight =
+                (ImGui::IsKeyDown(ImGuiKey_D) ? 1.0f : 0.0f) -
+                (ImGui::IsKeyDown(ImGuiKey_A) ? 1.0f : 0.0f);
+            input.moveUp =
+                (ImGui::IsKeyDown(ImGuiKey_E) ? 1.0f : 0.0f) -
+                (ImGui::IsKeyDown(ImGuiKey_Q) ? 1.0f : 0.0f);
+        }
+
         if (m_lookDragging || m_orbitDragging || m_panDragging) {
             input.mouseDelta = io.MouseDelta;
         }