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Old 03-16-2011, 09:17 AM
kopper kopper is offline
Join Date: Apr 2010
Posts: 18
Frame rate issue

This applies to Vizard R3 as well, but since I'm using R4, I'll post it here.

What is happening is that the application frame rate seems to always go down to the nearest (lower) round value.

I have a complex model that has about 1.5M primitives. Vizard has frustum culling by default, so that if I look away from the model, the frame rate gets up to 60, due to vsync.

The problem is, when I look at the model, the frame rate starts to get lower, which is normal. What's not normal is that the frame rate is always at a round number! from what I could tell, the fps is either at 60, 30, 20 or 15, or within 0.01 of those values.

By adjusting the view frustum such that only a few more primitives are added to the rendered scene, the frame rate goes, immediately, in a matter of 2 or 3 frames, from for example 30 to 20fps. This is really odd, and I wonder if there's any option that sets the frame rate to these fixed numbers, as it would be much better if I could run my app at 26fps, rather then always going down to 20.

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