Reading Geometry from ROM

[carlmarl]

I've been looking into creating some TAS tools for SM64 specifically.  I'm trying to create a map of the geometry in the currently loaded level while having accurate positioning of each of object's (ground textures, item boxes, enemies, etc.) vertices/positions relative to the in game coordinate system. Kinda like making a overhead map. I'm sure that there is a way to do this, as Toad's Tool must do something like this for editing purposes.  Is there any way to read these from the ROM? 

Sorry if this is not the place for this question, but I haven't been able to find anyone who knows.

Also, is there a way to determine whether a ground tile is a slope (determine whether mario can walk on it or if he will slide when stood on)?