frame interp camera cleanups

src/d/d_camera.cpp

@@ -11009,6 +11009,15 @@ static int camera_execute(camera_process_class* i_this) {
     i_this->mCamera.CalcTrimSize();
 
     store(i_this);
+
+#ifdef TARGET_PC
+    // record new camera for our sim frame
+    dusk::frame_interp::record_camera(i_this, get_camera_id(i_this));
+    // interpolate the view now so that this sim frame's view matrix matches what
+    // we'll be rendering with later
+    dusk::frame_interp::interp_view(&i_this->view);
+#endif
+
     view_setup(i_this);
     return 1;
 }
@@ -11077,9 +11086,6 @@ static int camera_draw(camera_process_class* i_this) {
     C_MTXPerspective(process->view.projMtx, process->view.fovy, process->view.aspect, process->view.near_, process->view.far_);
     mDoMtx_lookAt(process->view.viewMtx, &process->view.lookat.eye, &process->view.lookat.center,
                   &process->view.lookat.up, process->view.bank);
-#ifdef TARGET_PC
-    dusk::frame_interp::record_camera(process, camera_id);
-#endif
 
 #if WIDESCREEN_SUPPORT
     mDoGph_gInf_c::setWideZoomProjection(process->view.projMtx);

src/d/d_kankyo.cpp

@@ -35,6 +35,7 @@
 #if TARGET_PC
 #include "dusk/imgui/ImGuiBloomWindow.hpp"
 #include "dusk/settings.h"
+#include "dusk/frame_interpolation.h"
 #endif
 
 static void GxXFog_set();
@@ -8105,11 +8106,23 @@ void dKankyo_HIO_c::genMessage(JORMContext* mctx) {
 
 #endif
 
+#if TARGET_PC
+static void interp_callback(bool isSimFrame, void* pUserWork) {
+    if (!isSimFrame) {
+        g_env_light.drawKankyo();
+    }
+}
+#endif
+
 void dScnKy_env_light_c::drawKankyo() {
     setSunpos();
     SetBaseLight();
     setLight();
     dKy_setLight_nowroom(g_env_light.PrevCol);
+
+#if TARGET_PC
+    dusk::frame_interp::add_interpolation_callback(interp_callback, nullptr);
+#endif
 }
 
 void dKy_undwater_filter_draw() {