DrawArrow (TcVnVector4_DINT)

Draws an arrowed line.

Syntax

Definition:

HRESULT DrawArrow(
    HRESULT            hrPrev,
    TcVnVector4_DINT&  aLine,
    ITcVnImage*        ipDestImage,
    TcVnVector4_LREAL& aColor,
    LONG               nThickness,
    bool               bDoubleHead,
    ETcVnLineType      eLineType = LT_8_CONNECTED,
    ULONG              nShift = 0,
    double             fTipLength = 0.1
)

Parameters

Name

Type

Default

Description

hrPrev

HRESULT

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

aLine

TcVnVector4_DINT&

The start and end point of a line segment [x1, y1, x2, y2]

ipDestImage

ITcVnImage*

Destination image

aColor

TcVnVector4_LREAL&

Color

nThickness

LONG

Line thickness

bDoubleHead

bool

To draw an arrow on each side of the line.

eLineType

ETcVnLineType

LT_8_CONNECTED

Line type

nShift

ULONG

0

Fractional bits of the coordinates (bit shift)

fTipLength

double

0.1

Length of the arrow's tip as a fraction of the line's length

DrawArrow (TcVnVector4_DINT) 1: Return value

HRESULT

Required License

TC3 Vision Base

System Requirements

Development environment

Target platform

PLC libraries to include

TwinCAT V3.1.4024.59 or later

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

Tc3_Vision