F_VN_WarpPerspective_Rectangle

F_VN_WarpPerspective_Rectangle 1:

Use a perspective transform to warp a rectangle.

Syntax

Definition:

FUNCTION F_VN_WarpPerspective_Rectangle : HRESULT
VAR_INPUT
    nTopLeftX             : UDINT;
    nTopLeftY             : UDINT;
    nBottomRightX         : UDINT;
    nBottomRightY         : UDINT;
    ipDestPoints          : Reference To ITcVnContainer;
END_VAR
VAR_IN_OUT
    aTransformationMatrix : TcVnMatrix3x3_LREAL;
END_VAR
VAR_INPUT
    hrPrev                : HRESULT;
END_VAR

F_VN_WarpPerspective_Rectangle 2: Inputs

Name

Type

Description

nTopLeftX

UDINT

x coordinate of the top left corner

nTopLeftY

UDINT

y coordinate of the top left corner

nBottomRightX

UDINT

x coordinate of the bottom right corner

nBottomRightY

UDINT

y coordinate of the bottom right corner

ipDestPoints

Reference To ITcVnContainer

Returns the 4 transformed points (ContainerType_Vector_TcVnPoint2_REAL)

hrPrev

HRESULT

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

F_VN_WarpPerspective_Rectangle 3: In/Outputs

Name

Type

Description

aTransformationMatrix

TcVnMatrix3x3_LREAL

Perspective transformation matrix

F_VN_WarpPerspective_Rectangle 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