Render Extremely Far off Objects

Question

I'm trying to render objects that are very very very very (1.5x10^15) far away. I can adjust clipping planes on the camera to render t$$anonymous$$s far away but the objects are so far away that they don't even render on the screen regardless. Is there any way to render objects t$$anonymous$$s far away as a minimum of 1 pixel or even 5?

Answer 1

Answer by jpthek9 · Mar 01, 2015 at 12:04 AM

You could hard code t$$anonymous$$s feature in with somet$$anonymous$$ng like...

 public float FarRender = 10000; //Minimum distance to far render

 void OnGUI()
 {
     if (Vector3.sqrMagnitude(transform.position, Camera.main.transform.position) < 10000 * 10000)
     {
         Vector2 ScreenPos = Camera.main.WorldToScreenPoint(transform.position);
         if (new Rect (1,1, Screen.Width - 2, Screen.Height - 2).Contains(ScreenPos))
         {
             GUI.DrawTexture(new Rect(ScreenPos.x, ScreenPos.y, 5,5), *Your 'far texture' for the object*);
         }
     }
 }

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Major · Mar 01, 2015 at 01:15 AM 0

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This is actually a pretty fantastic solution, but the textures start looping across the screen and even display when the object isn't being looked at, and when rotating the camera the texture doesn't follow the object. I am not an experienced GUI programmer, so is there any way to fix this?

jpthek9 · Mar 01, 2015 at 01:59 AM 0

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Oh, sorry about that. You have to check if the object is within the camera's view. You can check by doing:

if (new Rect (1,1, Screen.Width - 2, Screen.Height - 2).contains(ScreenPos)) { Gui.DrawTexture(...) }

I added it in to the answer's code. By the way, this is all theorycrafting so no guarantees but I do hope it works for you. I'm not very experienced with GUI either :D

Major · Mar 03, 2015 at 03:21 AM 0

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Would there be any other way to do this same strategy but not in OnGUI()? This works great for up to 3 objects but when 100 pop up it becomes more than unplayable...

jpthek9 · Mar 19, 2015 at 10:48 PM 0

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OnGUI would probably be your best bet though I haven't tested it with that many objects. Definitely don't let the possibility of high performance demand stop you from trying it out. I can't think of any other methods except for maybe rendering to a texture then manually drawing the objects on the texture each frame. If OnGUI turns out to be a bust performance-wise, you could try that out and it might also give you a bit more control over the drawings but editing textures with code can get pretty messy.

Render Extremely Far off Objects

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