Outline shader without depth test

[javier.serrano]

Hi, we are developing a border detection/outline shader that renders the border of a mesh over any other objects in the scene. Some other post ask for similar effects but none came up with a final solution:

 

https://developer.unigine.com/forum/topic/3432-object-outline-shader/?hl=%2Bdepth+%2Btest#entry18421

https://developer.unigine.com/forum/topic/2899-depth-testing-in-post-shader-precision/?hl=%2Bdepth+%2Btest#entry15842

https://developer.unigine.com/forum/topic/917-depth-test/?hl=%2Bdepth+%2Btest#entry4545

 

Sample post_selection_00 is the kind of effect that we need to achieve but rendering the border over all other objects (like disabling depth buffer). But I can't figure out how to achieve depth test disabling effect

Here is a sample image of what we want to achieve:

 

Any suggestions?

 

Thanks in advance.

 

[silent]

Hi Javier,

 

What SDK version are you currently using?

[javier.serrano]

We are currently developing in 2.3.1 version

[silent]

Javier,

 

If you have 2.3.1 SDK sources, the easiest way will be to disable depth test for Auxiliary buffer. Inside engine/render/RenderRenderer.cpp:

// find that method
void RenderRenderer::render_auxiliary_surfaces(Vector<ObjectSurface *> &surfaces)

//replace
state->setDepthFunc(DEPTH_GEQUAL); 

//to:
state->setDepthFunc(DEPTH_NONE);

RIght now, I'm afraid there is no way to do such trick via material settings. Please, keep in mind that it will affect all other Aux passes and they will also ignore depth.

 

Thanks!

[javier.serrano]

Thanks for your reply, finally we came up with a solution by rendering the mask with a WidgetSpriteNode and then passing the texture to a custom post shader similar to post_selection_00.

 

Here is the result:

 

Is there any other option to retrieve this mask with a better performance than using a WidgetSpriteNode? 

 

Thanks

 

[silent]

Hi Javier,

Nice solution you have there! I think if it well fit your needs you should use it :)

[Kireita]

On 2/1/2017 at 3:36 PM, silent said:

Hi Javier,

Nice solution you have there! I think if it well fit your needs you should use it :)

how could i reproduce that effect in C#?