F_VN_DecomposeAffineTransformation

F_VN_DecomposeAffineTransformation 1:

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

Syntax

Definition:

FUNCTION F_VN_DecomposeAffineTransformation : HRESULT
VAR_IN_OUT
    aAffineTransform : TcVnMatrix2x3_LREAL;
    fRotationAngle   : LREAL;
END_VAR
VAR_INPUT
    hrPrev           : HRESULT;
END_VAR

F_VN_DecomposeAffineTransformation 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_DecomposeAffineTransformation 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)

F_VN_DecomposeAffineTransformation 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