UMG Minimap | Almost Plug and Play

Distribution UE Marketplace
127

The way I get it to work with huge world and level streaming:

  • Let CaptureCam follow own character. Can be set outside MiniMap.
  • Select FOV 10 of CaptureCam.
  • In MiniMap_Math::GetLandscapeEdges, get the size of LevelBounds and calculate BottomLeft/TopRight from character location. The box returned will follow character. The box can be scaled dependent of zoomout and capcam fov.
  • In MiniMap::AdjustZoom, set zoom range from 0.25 to 0.55. Depends on capcam fov and zoomout we allow.
129

Hi for!

How should i do to remove points Added? An example could be a dead actor, or a entity (house or building) that was destroyed by a bomb?

thanks…

130

Points automatically get removed when you no longer add them, you don’t have to do anything :slight_smile:

131

Awesome job! The tutorial was great.

However, I don’t see this on the Marketplace. The link is broken (404 Page Not Found).

132

Hello, can be easily converted in a 3D map for a 6dof space game? Thank you in advice

133

Thanks! I have fixed the link, thanks for pointing that out :slight_smile:

Not really, it’s UMG and that’s just 2D.

134

Hey! The link that I click on “UE4 Marketplace” converts to - https://www.unrealengine.com/content/f7569b75555146fd83660f44cc3904d1
Still comes up with 404.

Correct me if I’m doing something wrong or maybe something flaky on the Marketplace?

Have a good day.

135

Ah, you talk about the link in my signature, I thought you talked about the link in the first post of this thread :slight_smile: I forgot about the one in my signature, I have also fixed it now, thanks for making me aware of that!

136

Yes that did it! Have a wonderful day. :slight_smile:

137

Hey man, I’ve been using this for some time now while prototyping, and it’s always come at quite a performance cost. Any tips for how to lower the performance impact?

138

Hey there, I know I messaged you but I thought for the sake of others maybe we could discuss it on here too.
Performance wise, like the guy above, im trying to optimize abit.
Iv removed zoom and rotation but is there any other aspects I can lower/remove without it affecting the function of the mini map?

139

The best thing you can do is to use a custom texture for the background of the minimap. The most expensive thing is the Capture Cam, thats a SceneCapture2D so it’s basically rendering a whole image of the scene again. Once you use a custom texture that cost is no longer there and you should not notice the minimap at all regarding the performance :slight_smile:

A custom texture also usually looks way better than what the Capture Cam provides since you can manually stylize it. It just won’t work if you need something like a dynamically changing landscape.

140

re optimization:

I’ve been doing some work on my own system so I haven’t tested to confirm this in John’s radar, but I think running “Get All Actors Of Class” every tick for actors we want displayed is a probably a bit of a resource sink too. It’s really convenient for just getting it all set up plug and play so in terms of the marketplace I don’t disagree with this choice.
Instead of getting everything each tick, a more efficient solution would be getting point locations from a reliable array of objects that only updates when a new thing is spawned. So if you’re marking characters say, rather than just getting every actor in the scene every tick, make the character let the radar know it exists on construction, and that it’s gone when it’s destroyed.

141

Thank you I will give that a go :slight_smile:

142

Yes, that’s right. I assume many people already have the data for the actors in some array so they can just use that array. Using the “Get All Actors Of Class” node in the example is just for making it a bit easier to understand. I think the cost isn’t too high though, I would consider it negligible compared to the scene capture. Especially since most games are usually limited by the GPU and not by the game thread :slight_smile:

143

What is the correct way to go about using a custom texture instead of capture cam?
I have removed capture cam from the scene and replaced the mapimage material (inside of MovePanel) with my own image
Is there more I need to turn off/change to improve performance?
As without the UI i get about 80fps in editor and with the UI i get about 45fps

144

Yeah I was getting about the same kind of hit. Are you using the radar just in a screen-space hud type setup out of curiosity? We had it in a scene widget component.

145

The way you did it is almost right, instead of replacing the whole material in the MovePanel it’s easier to just open the Material and switch the texture in there from the render target to your own one, but this should not make any difference regarding performance.

For performance, never test in editor. The editor is doing a lot of stuff in the background and a lot of code is way slower in the editor than it will be in the game, so either test in standalone, or for best results compare it in packaged. If you still get such a huge difference in performance there then something is wrong, but I would guess the performance difference is gone there :slight_smile:

146

I just thought of another quick and easy way.
Put a CaptureCamera in your map, give a slight delay so it has time to capture your map and then destroy it.
So it saves an image of the map you currently have and doesnt take up much more performance!
You see any issue with that?

147

You don’t need to destroy the Capture Cam for that. If you disable “Capture Every Frame” on the Capture Cam then it will only capture the map once on begin play and then use that image the whole time. You can then also manually call the “UpdateImage” function from the Capture Cam to update the image at any time :slight_smile: