OBD:M3GM: Difference between revisions

OBD:M3GM (view source)

391 bytes removed , 7 February 2008

"generates its own"? "ignored"? what the?!

708

edits

@@ Line 26: / Line 26: @@
 ;Vertex normals
 :The first VCRA stores the normals for every vertex (same entries as in PNTA and TXCA).
-:Vertex normals are supposed to be used by Gouraud shading (directional lighting).
+:Vertex normals are used by Gouraud shading (directional lighting).
-:The precomputed normals are apparently ignored by Oni, which generates its own...
 ;Face normals
 :The second VCRA stores the normals for every face (groups defined by the second IDXA).
-:Face normals may be used for env-mapping (but vertex normals could also work there).
+:Face normals are used for backface culling.
-:The precomputed face normals are apparently ignored by Oni too... didn't check much.
 ;Triangle strips
 :The first IDXA lists the triangles as strips. The IDs are the ones in PNTA and IDXA.
@@ Line 38: / Line 36: @@
 ;Face groupings
 :The second IDXA groups the triangles into faces (oriented by the second VCRA).
-:Even if the normals are computed at runtime, the group assignment might be used.
-:(e.g., if a face normal is defined as the average of the normals of the triangles)
 {{OBD_File_Footer | type=M3GM | prev=M3GA | next=Mtrl | name=Geometry | family=Generic | align=center}}