Godot overdraw

snwflk

Hello. I'm interested in avoiding overdrawing in 2D and 3D. 2D: Does Godot (preferably 3.0) have a way of checking depth of sprites and not drawing opaque parts of sprites over others? 3D: Does it have automatic or otherwise implementable occlusion culling (besides frustum culling)?

Calinou

3D: Does it have automatic or otherwise implementable occlusion culling (besides frustum culling)?

There is no occlusion culling in 3.0 – this will be added in 3.1 instead, due to lack of time. Godot 2.1 features BSP-style portals and rooms, but these tend to be inflexible and hard to use.

snwflk

Thank you for the info. What about 2D? Does overlapping sprites incur drawing the same pixel multiple times or is the overdrawn pixel discarded based on z-buffer?

BTW thank you for making time (again) to reply in the forums.

Refeuh

I'm no Godot-expert, but with regard to general rendering, this is likely to depend on the nature of your scenes ; i.e. drawing order (front-to-back or back-to-front), transparent sprites / alpha / blending, etc. Certain engines do some pre-processing for solid geometry (simplify overlaps, etc.) but for simple sprites it's usually faster to just pump quads and discard pixels at the rendering stage.

snwflk

for simple sprites it's usually faster to just pump quads and discard pixels at the rendering stage.

That's what I'm talking about. basic solid overlapping sprites. I know most of the the engines out there automatically discard pixels in front-to-back rendering. Does Godot do it as well?