occlusion culling issue with LE 2.4

[remi666]

Hello everybody,

 

We have noticed a strange behavior of Leadwerks in the 2.4 versus the 2.3 concerning the occlusion culling:

On 2.3 version, when we checked the "occlusion culling" option in LE on imported objects, we noticed a higher framerate when the object was behind other objects (because it was killed by the GPU with the occlusion culling algo I guess).

Now, with the 2.4, it does not work.

You will find attached an exemple: if you stay in front of the cube (with all the sphere behind):

- you will see in 2.3 version around 1000 polys if occlusion culling is enabled

- you will see in 2.3 version around 20.000 polys if occlusion culling is disabled

 

- you will see in 2.4 version around 20.000 polys whatever the occlusion culling status

 

Nota: to have the Properties menu of an object, I add the following scipt in LE 2.4 for this object:

 

require("scripts/class")

 

local class=CreateClass(...)

 

...and in "Appearance", I check "occlusion culling".

 

The same behavior has been observed by compiling an other scene, by using LE 2.3 C libraries versus LE 2.4 C libraries....

 

thanks in advance for a quick answer

occlusioncullingtest.rar

[Canardia]

LE 2.3 has also only frustum culling, but no occlusion culling.

 

I tried to make my own occlusion culling with EntityVisible() and the HideEntity() if it's not visible, but unfortunately EntityVisible() is horribly slow and doesn't bring a better FPS.

[Josh]

I recommend posting a demo that shows the problem in the bug tracker. It should work.

[remi666]

Hello Lummoja,

 

I do not understand why you mention that "LE 2.3 has also only frustum culling, but no occlusion culling.". To me, LE 2.3 has both, and I posted an example in the bug tracker, where you see a discrepancy of the framerate and polys computed with a gmf file using the occlusion culling (enabled)

 

Remi

[remi666]

Hello Leadwerks team,

 

I have posted my issue in the bug tracker, but I have no news...

Somebody could investigate, because this issue has some impacts on the performances of our game ?

thanks a lot,

 

Remi