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General => General discussions => Topic started by: Guardian on November 15, 2017, 09:22:32 pm

Title: Wrong numer of verteces in vertex array
Post by: Guardian on November 15, 2017, 09:22:32 pm

I'm reading the tutorial on sf::VertexArray ( https://www.sfml-dev.org/tutorials/2.4/graphics-vertex-array.php  (https://www.sfml-dev.org/tutorials/2.4/graphics-vertex-array.php)) and I don't understand what happens if I try to draw a vertex array with a wrong number of vertices for his primitive type. 
For example: what could happen if I drew a vertex array of 5 vertices using the sf::Lines primitive?

Title: Re: Wrong numer of verteces in vertex array
Post by: eXpl0it3r on November 15, 2017, 10:01:15 pm

In my opinion you're asking the wrong question. You don't need to know what happens, but you need to find a way to prevent that it does happen. ;)

Might be implementation dependent and the GPU driver decides what really happens.

Title: Re: Wrong numer of verteces in vertex array
Post by: Guardian on November 15, 2017, 10:09:38 pm

so it's an undefined behavior and I have to avoid it in every case.

Thank you.