error building Delaunay triangulation example OpenCV C++

Question

I am trying to run the Delaunay example code https://github.com/Itseez/opencv/blob/master/samples/cpp/delaunay2.cpp. but I face this error when building: "identifier "LINE_AA" is undefined", and "identifier "LINE_8" is undefined". where do you think the problem is?

I built the project using cmake and this is inside cmakelist.txt:

cmake_minimum_required(VERSION 2.8)
project( delaunay2)
find_package( OpenCV REQUIRED )
include_directories( ${OpenCV_INCLUDE_DIRS} )
add_executable( delaunay2 delaunay2.cpp )
target_link_libraries( delaunay2 ${OpenCV_LIBS} )

also I am running MSVC 2012 under winodws 7x64.

Here is a picture of debug assertion error which still pops up even after I Ignore but then it draws some lines for me!

enter image description here

last week, i also tried to run Delaunay example. I used the code given in `opencv/samples/cpp/delaunay2` and it worked perfectly fine for me. — skm, Jan 08 '15 at 20:24
Ok I found the code here: https://code.ros.org/trac/opencv/browser/trunk/opencv/samples/cpp/delaunay2.cpp?rev=6404 but now it gives me "debug assertion error" and crashes! — CV_passionate, Jan 08 '15 at 21:05
that code is for opencv3.0, you're obviously using the 2.4.x version — berak, Jan 08 '15 at 21:45
how do you know it is for opencv 3? it is using opencv2 header files. — CV_passionate, Jan 08 '15 at 21:57
^^ because in 3.0 a lot of constants were changed, e.g. from CV_AA to cv ::LINE_AA. — berak, Jan 09 '15 at 13:43

score 0 · Answer 1 · answered Jan 09 '15 at 13:45

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since you are using opencv2.4.x, please try the 2.4 example at: https://github.com/Itseez/opencv/blob/2.4/samples/cpp/delaunay2.cpp

2.4.x and 3.0 differ quite significantly.

answered Jan 09 '15 at 13:45

berak

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I tired that. It is still giving me Debug Assertion Failed error. but if I click on Ignore, it will start drawing the lines and triangles! I have attached a picture. Can you please tell me why this is happening and how to fix it? – CV_passionate Jan 09 '15 at 16:28
I am trying this on a windows x64 system. but the code is set to auto, debug, win32 in MSVC 2012 environment. Do you think thats where the problem coming from? – CV_passionate Jan 09 '15 at 16:56

score 0 · Accepted Answer · answered Jan 12 '15 at 18:48

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Finally got it working. This is the correct link for delaunay triangulation using OpenCV 2.4.9:

https://github.com/Itseez/opencv_attic/blob/master/opencv/samples/c/delaunay.c

answered Jan 12 '15 at 18:48

CV_passionate

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error building Delaunay triangulation example OpenCV C++

2 Answers2