Quote:
Originally Posted by Pulverator
I'm pretty sure it passes by pointer as this is the declaration in AxisCamera.h.
Code:
int GetImage(ColorImage *image);
It's my understanding that calling this method will set the passed pointer which in this case is "image." |
My understanding is that it can change whatever image is pointing to, but to change image itself it needs a pointer/reference to the image variable itself.
Trying storing a known value in image before calling GetImage and then comparing that to the value on return.
Code:
ColorImage *image = NULL;
camera.GetImage (image);
SmartDashboard::PutString ("image changed", image == NULL ? "no" : "yes");
(Apologies in advance if I messed up the syntax/function calls. This is from memory. I hope you get the general idea.)
P.S. Don't keep processing if image==NULL, the pointer dereference will cause an error.
In our tests, the value in image never changed.
I looked for other ways to initialize image but couldn't find anything.
One thing I'll try when I next get a chance on the robot will be to put the access to the test image back in and see if that will work as a workable initializer.