F_VN_DecomposeAffineTransformationExp

F_VN_DecomposeAffineTransformationExp 1:

Decompose an affine transformation matrix and return the rotation angle (clockwise) in radian, translation vector (pixels), scale, and skew vectors (angle in radian). The decomposition method assumes the following order of transformation: Translation, Rotation, Scale, and Skew.

Syntax

Definition:

FUNCTION F_VN_DecomposeAffineTransformationExp : HRESULT
VAR_IN_OUT
    aAffineTransform   : TcVnMatrix2x3_LREAL;
    fRotationAngle     : LREAL;
    aTranslationVector : TcVnVector2_LREAL;
    aScaleVector       : TcVnVector2_LREAL;
    aSkewVector        : TcVnVector2_LREAL;
END_VAR
VAR_INPUT
    hrPrev             : HRESULT;
END_VAR

F_VN_DecomposeAffineTransformationExp 2: Inputs

Name

Type

Description

hrPrev

HRESULT

HRESULT indicating the result of previous operations (If SUCCEEDED(hrPrev) equals false, no operation is executed.)

F_VN_DecomposeAffineTransformationExp 3: In/Outputs

Name

Type

Description

aAffineTransform

TcVnMatrix2x3_LREAL

Affine transformation matrix

fRotationAngle

LREAL

Rotation angle (radian) in the clockwise direction. The rotation center is the origin point (0,0)

aTranslationVector

TcVnVector2_LREAL

2D translation vector. The values are in pixels

aScaleVector

TcVnVector2_LREAL

2D scale vector

aSkewVector

TcVnVector2_LREAL

2D skew vector. The values are the skew angles in x and y directions in radian

F_VN_DecomposeAffineTransformationExp 4: Return value

HRESULT

Required License

TC3 Vision Base

System Requirements

Development environment

Target platform

PLC libraries to include

TwinCAT V3.1.4024.54 or later

PC or CX (x64) with PL50, e.g. Intel 4-core Atom CPU

Tc3_Vision