run d_a_bg::draw on interp frames

to set up lights. this is a somewhat hacky workaround for lighting setup, but it might be good enough?

include/dusk/frame_interpolation.h

@@ -46,15 +46,6 @@ void add_interpolation_callback(InterpolationCallBack pCallBack, void* pUserWork
 void begin_presentation_camera();
 void end_presentation_camera();
 
-struct PresentationCameraScope {
-    PresentationCameraScope() { begin_presentation_camera(); }
-    ~PresentationCameraScope() { end_presentation_camera(); }
-    PresentationCameraScope(const PresentationCameraScope&) = delete;
-    PresentationCameraScope& operator=(const PresentationCameraScope&) = delete;
-    PresentationCameraScope(PresentationCameraScope&&) = delete;
-    PresentationCameraScope& operator=(PresentationCameraScope&&) = delete;
-};
-
 }  // namespace frame_interp
 }  // namespace dusk
 #endif

include/f_pc/f_pc_node.h

@@ -18,6 +18,7 @@ typedef struct process_node_class {
     /* 0x0BC */ layer_class layer;
     /* 0x0E8 */ node_list_class layer_nodelist[16];
     /* 0x1A8 */ s8 unk_0x1A8;
+    /* 0x1A9 */ s8 draw_interp_frame;
 } process_node_class;
 
 typedef struct node_process_profile_definition {

src/d/actor/d_a_bg.cpp

@@ -623,6 +623,11 @@ int daBg_c::create() {
 
     dComIfGp_roomControl_onStatusFlag(roomNo, 0x10);
     OS_REPORT("<BG> room%d\n", roomNo);
+
+#if TARGET_PC
+    draw_interp_frame = true;
+#endif
+
     return cPhs_COMPLEATE_e;
 }
 

src/f_pc/f_pc_node.cpp

@@ -7,6 +7,13 @@
 #include "f_pc/f_pc_layer_iter.h"
 #include "f_pc/f_pc_debug_sv.h"
 
+#if TARGET_PC
+#include "f_op/f_op_draw_iter.h"
+#include "f_pc/f_pc_manager.h"
+
+#include "dusk/frame_interpolation.h"
+#endif
+
 int fpcNd_DrawMethod(nodedraw_method_class* i_method_class, void* i_data) {
     return fpcMtd_Method(i_method_class->draw_method, i_data);
 }
@@ -18,7 +25,17 @@ int fpcNd_Draw(process_node_class* i_procNode) {
     if (i_procNode->unk_0x1A8 == 0) {
         layer_class* save_layer = fpcLy_CurrentLayer();
         fpcLy_SetCurrentLayer(&var_r28->layer);
-        ret = fpcNd_DrawMethod(i_procNode->nodedraw_method, i_procNode);
+#if TARGET_PC
+        if (!i_procNode->draw_interp_frame && !dusk::frame_interp::is_sim_frame()) {
+            for (create_tag_class* i = fopDwIt_Begin(); i != NULL; i = fopDwIt_Next(i)) {
+                void* process = i->mpTagData;
+                fpcM_Draw(process);
+            }
+        } else
+#endif
+        {
+            ret = fpcNd_DrawMethod(i_procNode->nodedraw_method, i_procNode);
+        }
         fpcLy_SetCurrentLayer(save_layer);
     }
 

src/m_Do/m_Do_ext.cpp

@@ -25,6 +25,7 @@
 #include <cstdio>
 #include <cstring>
 #include "dusk/logging.h"
+#include "dusk/frame_interpolation.h"
 
 u8 mDoExt::CurrentHeapAdjustVerbose;
 u8 mDoExt::HeapAdjustVerbose;
@@ -349,6 +350,11 @@ void mDoExt_modelUpdateDL(J3DModel* i_model) {
 }
 
 void mDoExt_modelEntryDL(J3DModel* i_model) {
+#if TARGET_PC
+    if (!dusk::frame_interp::is_sim_frame())
+        return;
+#endif
+
     modelMtxErrorCheck(i_model);
 
     J3DModelData* model_data = i_model->getModelData();

src/m_Do/m_Do_main.cpp

@@ -243,15 +243,16 @@ void main01(void) {
                 fapGm_Execute();
                 mDoAud_Execute();
                 dusk::game_clock::reset_accumulator();
-            } else {
-                // run draw functions for anything specially marked to handle interp on non-sim ticks
-                fpcM_DrawIterater((fpcM_DrawIteraterFunc)fpcM_Draw);
             }
             dusk::frame_interp::interpolate();
-            {
-                dusk::frame_interp::PresentationCameraScope presentation_camera;
-                cAPIGph_Painter();
+            dusk::frame_interp::begin_presentation_camera();
+            if (!pacing.do_sim_tick) {
+                // run draw functions for anything specially marked to handle interp on non-sim
+                // ticks
+                fpcM_DrawIterater((fpcM_DrawIteraterFunc)fpcM_Draw);
             }
+            cAPIGph_Painter();
+            dusk::frame_interp::end_presentation_camera();
             dusk::frame_interp::set_ui_tick_pending(false);
         } else {
             dusk::frame_interp::set_ui_tick_pending(true);