Introduce this new pack in a more proper reviewable manner (#1192)

* Introduce this new pack in a more proper reviewable manner

Ideally I should have made a PR for my new pack and I understand the new geo function may have come out of no where. I've been thinking about adding it for a while and was going to utilize it in a new project I'm working on but I should have explained it first before pushing anything for sure

* Address suggestions

* Restore these, whoops

data/dynos_mgr_builtin.cpp

@@ -2037,6 +2037,7 @@ static const DynosBuiltinFunction sDynosBuiltinFuncs[] = {
     define_builtin_function(bhv_ambient_light_update, FUNCTION_BHV),
     define_builtin_function(bhv_point_light_init, FUNCTION_BHV),
     define_builtin_function(bhv_point_light_loop, FUNCTION_BHV),
+    define_builtin_function(geo_switch_character_type, FUNCTION_GEO),
 };
 
 static const char *sDynosBuiltinFuncTypeNames[] = {

src/game/mario_misc.c

@@ -926,3 +926,22 @@ Gfx *geo_process_lua_function(s32 callContext, struct GraphNode *node, UNUSED Ma
 
     return NULL;
 }
+
+Gfx *geo_switch_character_type(s32 callContext, struct GraphNode *node, UNUSED void *context) {
+    struct GraphNodeSwitchCase *switchCase;
+    
+    if (callContext == GEO_CONTEXT_RENDER) {
+        // move to a local var because GraphNodes are passed in all geo functions.
+        // cast the pointer.
+        switchCase = (struct GraphNodeSwitchCase *) node;
+
+        // pass in -1 to always use local mario
+        // otherwise use the mariostate asssociated with the object
+        struct MarioState* marioState = switchCase->parameter == -1 ? gMarioState : geo_get_mario_state();
+
+        // assign the case number for execution.
+        switchCase->selectedCase = marioState->character->type;
+    }
+
+    return NULL;
+}

src/game/mario_misc.h

@@ -38,5 +38,6 @@ Gfx *geo_mirror_mario_backface_culling(s32 callContext, struct GraphNode *node,
 Gfx* geo_mario_set_player_colors(s32 callContext, struct GraphNode* node, UNUSED Mat4* c);
 Gfx* geo_mario_cap_display_list(s32 callContext, struct GraphNode* node, UNUSED Mat4* c);
 Gfx *geo_process_lua_function(s32 callContext, struct GraphNode *node, UNUSED Mat4 *c);
+Gfx *geo_switch_character_type(s32 callContext, struct GraphNode *node, UNUSED void *context);
 
 #endif // MARIO_MISC_H