format  void MTH_PolyDataTransInit (void)
 Input  None
 Output  None
 Function value  None
 Function  Loads the DSP initialization and coordinate conversion processing program. 

  format  void MTH_PolyDataTransExec (MthPolyTransParm * polyTransParm)
 Input  polyTransParm: Coordinate conversion parameter table
 Output  polyTransParm: The following areas of the coordinate conversion parameter table are output.
  surfBright Polygon surface brightness calculation result
:  transViewVertAns Vertex data after viewpoint coordinate conversion
  vertBright Vertex brightness calculation result
:  transWorldVertAns Vertex data after world coordinate conversion
 Function value  None
 Function  Polygon data string (3D object) used in the 3D sprite display library
The following series of processing is performed by DSP for . 

 
  ・ Hidden surface detection and brightness calculation of polygon surface 
-Related parameter items-
 surfCount Number of polygon faces
SurfPoint Surface brightness calculation polygon surface representative point table
SurfNormal Polygon surface normal table
Matrix conversion matrix to viewpoint coordinate system
LightVector Light source vector in the viewpoint coordinate system
 surfBright Polygon surface brightness calculation result table
631 = 1: hidden surface
= 0: Display surface
B4-b0 = 0x00: darkest
= 0x1f: Brightest 

 ・ Converting vertex to viewpoint coordinate system 
-Related parameter items-
 transViewVertCount Number of vertex entries for viewpoint coordinate conversion
TransViewVertSrc Vertex data table before viewpoint coordinate conversion
ViewMatrix Conversion matrix to viewpoint coordinate system
 transViewVertAns Vertex data table after viewpoint coordinate conversion