Unable to see the output image after running main.cpp

[sarkararpan710]

I cloned the repository and build the solution file. Its been 2 hours and the execution window is still open.
after running through chapter 7 anti aliasing, It takes more time to run the code.

Is there anyway to know how much time its taking to render the ppm image.

[koenigmar]

You can't easily predict the exact time, but you could add something like
float progress = 1.0 - float(j) / float(ny); if (progress * 100 > percentage_counter) { std::cout << percentage_counter << "%" << std::endl; percentage_counter++; }
at the end of the outer rendering for loop to roughly track progress, with percentage_counter being an int starting at 1.

[nevack]

You can't easily predict the exact time, but you could add something like
float progress = 1.0 - float(j) / float(ny); if (progress * 100 > percentage_counter) { std::cout << percentage_counter << "%" << std::endl; percentage_counter++; }
at the end of the outer rendering for loop to roughly track progress, with percentage_counter being an int starting at 1.

Use std::cerr instead of std::cout

[ronaldfw]

Make sure you compile an optimized build (for example, -O2 with gcc/g++) and that you pipe the output to a file. That is, run the program like ./a.out >& file.

Running the final code of the (first) book should not take more than a few minutes on a more or less recent computer, ~2 hours seems way too much.

[hollasch]

Resolved in #265, development branch.