Custom flow field rendering overlay on osgEarth

[FuXiii]

I had a custom flow field rendering use instanced draw in OSG, it looks like :

202407031311.mp4

Just instanced massive points and transform them on earth surface.

Then I want combine them with osgEearth , and the scene tree may looks like :

root
 |_ earth
 |_ flowField

4b6f1ba0ed63365a473a468dcacefb1e.mp4

Looks like earth overlap the flow field (flow field draw first, earth draw second), I try to set RenderBinDetials of flow field :

flowFieldNode->getOrCreateStateSet()->setRenderBinDetials(1000, "RenderBin");

But it didn't solve the problem.

How to draw my custom things after earth had finished drawn (Let flow field overlay on earth).

Thanks~

[FuXiii]

I had recorded a new video to describe my issue:

This time I just draw the flow field with quarter of earth.

And the flow field instanced draw method are very simple. It just draw many point as usual. And StateSet looks like:

Result

202407031635.mp4

2024070316353.mp4

Looks like osgEarth will change earth pixel depth dynamically? Is there some method that I can draw common things overlay(coverd) on earth?

[gwaldron]

It seems like you are having depth-testing issues. Things to try:

1. Draw your points farther away from the earth's surface.
2. Try the LogarithmicDepthBuffer for higher depth precision.
3. Draw your points with depth testing disabled, and then use your shader to discard points that are on the opposite side of the earth from your camera.

Good luck!

[FuXiii]

Yes, The third proposal is a good suggestion for me. Thank you very much!