L_Matrix_IsIdentity - Raster Imaging C API Help

L_Matrix_IsIdentity

#include "LtPrimitives.h"

L_LTKRN_API L_BOOL L_Matrix_IsIdentity(matrix)

const L_MATRIX* matrix;

pointer to the structure to test

Indicates whether the specified L_MATRIX is an identity matrix.

Parameter Description
matrix Pointer to the L_MATRIX to test.

Returns

TRUE The L_MATRIX is an identity matrix.
FALSE The L_MATRIX is not an identity matrix.

Comments

An identity matrix has a value of 1 in coefficients [1,1],[2,2],[3,3] and a value of 0 in the rest of the coefficients. This correlates to setting m11 and m22 to 1 and m12, m21, offsetX, and offsetY to 0.

In an affine matrix, coefficients [3,1],[3,2],[3.3] are implied to always have the values 0,0,1 respectively.

1 0 0
0 1 0
0 0 1

Required DLLs and Libraries

LTKRN

For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application.

Platforms

Win32, x64, Linux.

Help Version 20.0.2018.7.30
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