I'm facing an issue with C++ where I'm generating a random point in a plane using a function that requires a **plane equation** and a **range** (both are 1D vectors of doubles). The function works fine when tested directly or in loops, but during a real-world case, it seems like the doubles in the range are getting dereferenced somehow. This happens specifically when calling the function with the range set as {-100 * magnitude, 100 * magnitude}. When I try to access the first element of the range inside the function that generates the random point, it leads to a segmentation fault. However, the `range` size stays correct at 2. Has anyone encountered this before or have any idea what could be causing this issue?
1 Answer
It looks like your code is fine based on what you've shared. The issue might stem from how you're passing the range variable. Since you're creating a temporary object for the range with `{...}`, it only lives until the function call is complete. If you try to store that reference somewhere and use it afterward, you'll run into problems. Check your code for any memory issues or undefined behavior elsewhere—it could lead to surprises elsewhere like stack corruption. I recommend running your test with Valgrind or AddressSanitizer to get more insights. If things still don't add up, consider sharing a smaller piece of code capable of reproducing the issue for help.
Totally—it could definitely be uninitialized doubles. That’s a common cause of such issues. Check your variable initializations, especially around that area.
Thanks for the insights! I think I may have a tough time since this part is within a 3D Delaunay triangulation setup, and it creates vectors to check point positions. The segmentation fault pops up when trying to mesh really large parts, like 10,000 units. Could this be linked to uninitialized variables?