How can i compile a file .cpp that use OTB?

OTB Usage
1

hello everyone ! I’m Fabrizio.
How can I compile a file cpp, written by me that use OTB API, with GCC / Cmake?

thx for help

2

Hi Fabrizio

There is some documentation about this here: https://www.orfeo-toolbox.org/CookBook-develop/C++/Tutorial.html

Hope it helps!

1 Like
3

yes !!! thank you !

4

sorry but when i run cmake i have this errors :

By not providing “FindOTB.cmake” in CMAKE_MODULE_PATH this project has
asked CMake to find a package configuration file provided by “OTB”, but
CMake did not find one.

Could not find a package configuration file provided by “OTB” with any of
the following names:

OTBConfig.cmake
otb-config.cmake

Add the installation prefix of “OTB” to CMAKE_PREFIX_PATH or set “OTB_DIR”
to a directory containing one of the above files. If “OTB” provides a
separate development package or SDK, be sure it has been installed.

How can I solve ?

5

Hi Fabrizio,
How are you building your project? I recommand that you use ccmake which is the curse version of cmake, it is easier for the beginning.
I think that here your error is that you did not provide cmake with a valid path to OTB. If you are in command line try something like:
cmake -DOTB_DIR=path/to/otb_binaries/lib/cmake/OTB-X.Y/ path/to/your/project/.

-DOTB_DIR will tell cmake where to find the OTBConfig.cmake file and will set your project up to use OTB.

6

Hi Antoine,
with this solution :

cmake -DOTB_DIR=path/to/otb_binaries/lib/cmake/OTB-X.Y/ path/to/your/project/.

I have no error, but I have one more question, where can I find the executable program of my project ?

I use an CMakeLists.txt identical like this :

Building simple OTB code — Orfeo ToolBox 9.0.0 documentation

thanks for help !!!

7

When using CMake you can set your project up through lot of variable. You can set it through command line with -DYOURVARIABLE=value or you can use a interface. In your project build directory (where you type cmake ....) you can do ccmake . which will open a interface letting you set all the variable you have access to.
When using CMake you should avoid building inside the source. What I recommend is that make a source directory and a build directory

root/
   | -build
   | -sources

Then you can go to build and type: ccmake path/to/where/is/CMakeLists.txt which will open the curse interface of cmake and set the build directory to build. If you don not want to use ccmake you can still do cmake -DVAR=val ccmake path/to/where/is/CMakeLists.txt and latter one edit the CMakeCache.txt.
The build directory is where you called cmake or ccmake if not explicitely set. Your executable should be under bin in the directory.

1 Like
8

Okay !!! I solved my problem for the simple helloworld !!!
But I want to use OTB for a photo projection :

OrthoRectificationExample.cxx — Orfeo ToolBox 9.0.0 documentation

And with the previous command I have an error.
When I run “make” after “cmake”, I’ve this one:

fatal error: otbSpatialReference.h: File or directory not exist
#include “otbSpatialReference.h”

how can I solve ?

Thank you !!

9

Hmmm… What version of OTB are you using?

10

the last one ! I’ve done this steps:

https://www.orfeo-toolbox.org/packages/OTB-6.6.1-Linux64.run
chmod +x OTB-6.6.1-Linux64.run
./OTB-6.6.1-Linux64.run

But I can’t execute that example ! I don’t know why. I’m not so good with linux, but i must use it ! I’m sorry for my ignorance !!!

11

Ok, the issue here is that you are using the 6.6.1 and the develop version of the cookbook. Try this with the latest binary packages: https://www.orfeo-toolbox.org/packages/ci/latest/.

1 Like
13

Okay !!! You are my saviour ! With yours tips works all perfectly !!