ksideris / directx-game-engine Goto Github PK
View Code? Open in Web Editor NEWThis is a simple and accessible direct2d game engine for windows 8.1 built for UCLA's CS188 class
License: Other
This is a simple and accessible direct2d game engine for windows 8.1 built for UCLA's CS188 class
License: Other
The asteroid iteration loop
for (auto asteroid = m_asteroidData.begin(); asteroid != m_asteroidData.end(); asteroid++)
can have some problems with the iterator asteroid being invalidated. Specifically while adding asteroids with
m_asteroidData.push_back(data);
If the adding of the additional data results in vector reallocation, all iterators are invalidated, and an exception can be triggered by next access of asteroid.
I ran into this problem when firing a lot of bullets and when keeping the asteroids created when hit with a bullet around.
I solved this problem by adding new asteroids to a separate vector, which is then safely dumped into the main vector after the entire asteroid loop is complete.
I also changed the standard iteration to a while loop form
auto asteroid = m_asteroidData.begin();
while(asteroid != m_asteroidData.end())
To avoid checking
if (asteroid == m_asteroidData.end())
break;
on each erasure (only checked on the end of the loop where I do asteroid++), though I don't think that should have any affect on this issue.
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