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gSPObjSubMatrix

 Format 
gSPObjSubMatrix(Gfx *gdl, uObjMtx *mtx)
gsSPObjSubMatrix(uObjMtx *mtx)
 Arguments
  • gdl is the pointer to the display list
  • mtx is the pointer to the 2D matrix structure
What This Macro Does
It is an S2DEX microcode macro that loads the data in the uObjSubMtx structure to the 2D matrix region of the RSP. However, the uObjSubMtx structure is a subset of uObjMtx, and holds the values of 2D matrix elements {X, Y, BaseScaleX, BaseScaleY} used by gSPObjRectangleR.

This macro changes the 2D matrix elements {X, Y, BaseScaleX, BaseScaleY} that correspond to the variable members of uObjSubMtx structure only; it does not affect the values in {A, B, C, D}. This macro is used mainly in conjunction with gSPObjRectangleR.

The S2DEX microcode uses a 2D matrix to hold the drawing data. This macro is one of the following two macros provided for the purpose of modifying this 2D matrix:
  • gSPObjMatrix
  • gSPObjSubMatrix
 For detailed information on S2DEX microcode GBI macros and data structures, please see the "S2DEX Microcode" area of the N64 Programming Manual.

See Also
S2DEX Microcode
guS2DInitBg


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Copyright © 1998
Nintendo of America Inc. All rights reserved
Nintendo and N64 are registered trademarks of Nintendo
Last updated January 1998