Hi,

I have a player and a static camera.

I want to check if camera can see the player.

Any way to do this?

This is one way

Wow, thank you. I didn't know such a function already exists.

huh I had an error there, it's player.x, not player

It is camera.x as well instead of camera...

haha yes,I'm too blind today...

It seems to be a bug with the vec_to_screen function.

Before anything else I say about the bug: You shouldn't use Player directly in the argument and also the Camera should not have a ".X" (I mean: camera.x).

this is the difinition:

vec_set(temp,player.x);
if (vec_to_screen(temp,camera) != NULL)
{
//Codes
}

there is no problem till here ok?

The buggy thing is here:

The problem I have is something strange.



The problem is: this function I wrote should work without any problem. But it does not.

I accidentally noticed that the function works as I want only when an empty if clause like this, is used:



When I comment the above if clause, the function doesn't work as I want.

Why this happens? I mean this is just an If statement and it does not apply any effects. But why it affects my function when I comment it?

Why not use the CLIPPED eflag?

if (!(my.eflags&CLIPPED))

You're right about the second argument. A view is expected there, not a vector. My bad. Sorry about this. The if clause will modify your temp vector. I don't know if this helps. Post the rest of your code and please describe what "not working" means to you...

EDIT: You can use the CLIPPED flag as widi suggested, but this is not very precise. An object might not be visible on the screen but be clippped anyways.

if you're using more than one view use vec_for_screen, otherwise just use the CLIPPED flag
i've never had issues with an entity being visible but not having it's clipped flag set
(you can also use view_check() though i'd stick with one of the other methods, see here for a similar thread)