app: move the showcase hotkey to Ctrl+Shift+B

src/skate3_app_common.cpp

@@ -770,7 +770,7 @@ void Skate3BaseApp::OnCreateDialogs(rex::ui::ImGuiDrawer* drawer) {
                         "Native render debug menu", [this] {
                           ToggleNativeDebug();
                         });
-  rex::ui::RegisterBind("bind_skate3_showcase", "Home",
+  rex::ui::RegisterBind("bind_skate3_showcase", "Ctrl+Shift+B",
                         "Graphics build-up showcase", [] {
                           REXCVAR_SET(
                               skate3_native_render_scene_showcase,

src/skate3_native_debug_dialog.cpp

@@ -426,7 +426,7 @@ void DrawShowcaseSetupWindow(bool* p_open) {
     return;
   }
   const bool running = REXCVAR_GET(skate3_native_render_scene_showcase);
-  if (ImGui::Button(running ? "Cancel showcase" : "Start showcase (Home)",
+  if (ImGui::Button(running ? "Cancel showcase" : "Start showcase (Ctrl+Shift+B)",
                     ImVec2(-1.0f, 0.0f))) {
     REXCVAR_SET(skate3_native_render_scene_showcase, !running);
   }
@@ -551,7 +551,7 @@ void DrawShowcaseCaptureSection() {
   DrawMaxQualityToggle();
   {
     const bool running = REXCVAR_GET(skate3_native_render_scene_showcase);
-    if (ImGui::Button(running ? "Cancel showcase" : "Start showcase (Home)")) {
+    if (ImGui::Button(running ? "Cancel showcase" : "Start showcase (Ctrl+Shift+B)")) {
       REXCVAR_SET(skate3_native_render_scene_showcase, !running);
     }
     if (ImGui::IsItemHovered()) {

src/skate3_native_scene.cpp

@@ -300,8 +300,8 @@ REXCVAR_DEFINE_BOOL(skate3_native_render_scene_showcase, false, "Skate 3",
                     "both sides rendered live. Layer order and grouping come from "
                     "skate3_native_render_scene_showcase_order (edited in the F12 "
                     "showcase setup window). Clears itself when the sequence "
-                    "finishes; set to false mid-run to cancel. Also on the Home "
+                    "finishes; set to false mid-run to cancel. Also on "
-                    "key by default (bind_skate3_showcase). Layers whose feature "
+                    "Ctrl+Shift+B by default (bind_skate3_showcase). Layers whose feature "
                     "is disabled (or unavailable without the HDR intermediate) "
                     "are skipped.")
     .lifecycle(rex::cvar::Lifecycle::kHotReload);
@@ -7883,6 +7883,43 @@ static void ApplySunOverride(FrameScene& scene) {
   }
 }
 
+// Hor+ ultrawide: clip-space X scale that widens the game's screen-shaped
+// projection to the wide guest-output aspect (see the SDK's
+// ApplyNativeGuestOutputWideAspect). 1.0 while the output is not wide. The
+// projection aspect is read off the matrix itself (|m11/m00|) so the FOV
+// override and freecam zoom compose naturally.
+float WideOutputHorScale(const float proj[16]) {
+  const double wide_aspect = rex::graphics::GetNativeGuestOutputWideAspect();
+  if (wide_aspect <= 0.0 || !rex::graphics::IsNativeGuestOutputActive()) {
+    return 1.0f;
+  }
+  const float m00 = std::fabs(proj[0]);
+  const float m11 = std::fabs(proj[5]);
+  if (!(m00 > 1e-6f) || !(m11 > 1e-6f)) {
+    return 1.0f;
+  }
+  const double base_aspect = double(m11) / double(m00);
+  if (wide_aspect <= base_aspect + 0.01) {
+    return 1.0f;
+  }
+  return float(base_aspect / wide_aspect);
+}
+
+// Applies the Hor+ scale to the published camera: column 0 of the row-vector
+// projection and view*proj (clip.x = dot(v, column 0)). Every consumer (draw
+// MVPs, post-pass unprojection, splines, frustum tests) reads these published
+// matrices, so the frame stays self-consistent, exactly as if the game camera
+// itself had the wide aspect.
+void WidenPublishedCamera(FrameScene& scene, float scale) {
+  if (scale == 1.0f) {
+    return;
+  }
+  for (int r = 0; r < 4; ++r) {
+    scene.proj[r * 4 + 0] *= scale;
+    scene.view_proj[r * 4 + 0] *= scale;
+  }
+}
+
 void BuildFrameScene(uint8_t* base, const SubmitRecord* records, size_t count) {
   if (!SceneEnabled()) {
     return;
@@ -9218,6 +9255,12 @@ void BuildFrameScene(uint8_t* base, const SubmitRecord* records, size_t count) {
     }
   }
 
+  // Hor+ ultrawide scale for this frame's camera (1.0 when the output is not
+  // wide). The matrices are widened after the camera overrides below; the
+  // retention frustum guards divide by it here so their tests already match
+  // the frame's real (wider) view.
+  const float wide_hor_scale = WideOutputHorScale(scene.proj);
+
   // Off-screen retention (see g_retained_items): re-append statics the game
   // view-culled this frame while the trailing rendered pose can still see
   // them. Runs AFTER the smoothing block so retained copies never enter the
@@ -9275,14 +9318,14 @@ void BuildFrameScene(uint8_t* base, const SubmitRecord* records, size_t count) {
       // it. The 0.97 margin shrinks the tested frustum so bounds poking
       // just inside an edge still count as view-culled.
       if (now - r.last_seen > kRetainTtlFrames ||
-          !ItemOutsideFrustum(r.item, guest_vp, 0.97f)) {
+          !ItemOutsideFrustum(r.item, guest_vp, 0.97f / wide_hor_scale)) {
         rit = g_retained_items.erase(rit);
         continue;
       }
       // Draw it only if the RENDERED pose can actually see it (widened
       // frustum: only clearly-outside skips); after a fast 180 the trail
       // behind the camera stays retained but costs nothing.
-      if (!ItemOutsideFrustum(r.item, scene.view_proj, 1.05f)) {
+      if (!ItemOutsideFrustum(r.item, scene.view_proj, 1.05f / wide_hor_scale)) {
         scene.items.push_back(r.item);
       }
       ++rit;
@@ -9478,6 +9521,11 @@ void BuildFrameScene(uint8_t* base, const SubmitRecord* records, size_t count) {
   UpdateFreecam(scene, cam_view,
                 std::chrono::duration<double>(build_t0.time_since_epoch()).count());
 
+  // Hor+ ultrawide: widen the published camera to the wide output aspect.
+  // Applied after every camera override (smoothing, synthetic pan, freecam)
+  // so it survives their view_proj/proj rewrites.
+  WidenPublishedCamera(scene, wide_hor_scale);
+
   // Publish the frame's captured fog rows and re-arm the OnDrawDone capture
   // (keyed to this frame's camera) for the next frame.
   if (g_fog_have) {