F_VN_ApproximatePolygon
Approximate a contour to a simplified polygon (using the Douglas-Peucker algorithm).
Syntax
Definition:
FUNCTION F_VN_ApproximatePolygon : HRESULT
VAR_INPUT
ipSrcContour : ITcVnContainer;
ipDestContour : Reference To ITcVnContainer;
fMaxDist : LREAL;
bClosed : BOOL;
hrPrev : HRESULT;
END_VAR
Inputs
|
Name |
Type |
Description |
|---|---|---|
|
ipSrcContour |
Single contour (ContainerType_Vector_TcVnPoint2_DINT or ContainerType_Vector_TcVnPoint2_REAL; The elements of this container are the points of the contour.) | |
|
ipDestContour |
Reference To ITcVnContainer |
Returns a container which is filled with the approximated polygon points (same type ID as ipSrcContour; Non-zero interface pointers are reused.) |
|
fMaxDist |
LREAL |
Maximum distance between the original contour and its approximation |
|
bClosed |
BOOL |
Specify, if the contour is closed (first and last points connected) or not |
|
hrPrev |
HRESULT indicating the result of previous operations (If SUCCEEDED(hrPrev) equals false, no operation is executed.) |
Return valueRequired License
TC3 Vision Base
System Requirements
Development environment | Target platform | PLC libraries to include |
|---|---|---|
TwinCAT V3.1. 4024.44 or later | PC or CX (x64) with PL50, e.g. Intel 4-core Atom CPU | Tc3_Vision |