guMtxCatL [Function]

Function

guMtxCatL

Multiplies matrices (fixed point)

Syntax

#include <ultra64.h>        /* gu.h */
void guMtxCatL(Mtx *m, Mtx *n, Mtx *res);

Arguments

m

Pointer to first matrix

n

Pointer to second pointer

res

Pointer to matrix resulting from the computation (m x n)

Returned value

None.

Description

Executes a multiplication of the two matrices (m, n) and returns the result to the structure indicated by res. This function provides a useful way to process matrices on the host CPU. Floating point can be handled with the guMtxCatF function.

For details, see 1-5-2 "Matrix Multiplication" in Step 3 of the Kantan Manual. For an explanation of the fixed-point format, see gSPMatrix.

Comment

It is alright for the resulting matrix res to comprise just one of the input matrices m or n.

The Mtx structure looks like this:

typedef long  Mtx_t[4][4];
typedef union {
     Mtx_t          m;
     long long int  force_structure_alignment;
} Mtx;

See also

gSPMatrix, guMtxCatF

Revision history

03/01/99 Completely rewritten.