Add P_LoadNodes and refactor P_SetupLevel vertices to call via pointers. Add the stub for R_RenderPLayerView and transfering misc values (player and player->mobj). Start adding P_LoadThings, just aiming to get player mobj created during level load

src/r_main.c

@@ -41,6 +41,8 @@
 #include "r_things.h"
 #include "tables.h"
 
+#include "ipu_host.h"
+
 // Fineangles in the SCREENWIDTH wide window.
 #define FIELDOFVIEW 2048
 
@@ -744,6 +746,7 @@ void R_RenderPlayerView(player_t *player) {
   NetUpdate();
 
   R_DrawMasked();
+  IPU_R_RenderPlayerView();
 
   // Check for new console commands.
   NetUpdate();