Matrix Type Syntax
Microsoft DirectX 9.0 SDK Update (October 2004)

Matrix Type Syntax


A matrix is a special data type that contains between one and sixteen components. Every component of a matrix must be of the same type.

Syntax

TypeRxC VariableName

where:

TypeRxCIdentifies the data types, and number of components in each row and column. The type is one of the basic types. The number of rows and columns is a positive integer between 1 and 4.
VariableNameAn ASCII string that uniquely identifies the variable name.

Remarks

Here are some examples:

int1x1    iMatrix;   // integer matrix with 1 row,  1 column
int4x1    iMatrix;   // integer matrix with 4 rows, 1 column
int1x4    iMatrix;   // integer matrix with 1 row, 4 columns
double3x3 dMatrix;   // double matrix with 3 rows, 3 columns

float2x2 fMatrix = { 0.0f, 0.1, // row 1
                     2.1f, 2.2f // row 2
                   };   

A matrix can be declared using this syntax also:

matrix <Type, Number> VariableName

The matrix type uses the angle brackets to specify the type, the number of rows, and the number of columns. This example creates a floating-point matrix, with two rows and two columns. Any of the scalar data types can be used.

Here is an example:

matrix <float, 2, 2> fMatrix = { 0.0f, 0.1, // row 1
                                 2.1f, 2.2f // row 2
                               };


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