Get static mesh world location from Unreal Editor

Development Programming & Scripting UI
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1

I’m trying to draw some text on the screen in AHUD::DrawText() method.

Now, I think, I have find it how to do it: using ProjectWorldLocationToScreen. But now I don’t know which is the WordLocation I have to use.

On Unreal Editor, on my map I have a static mesh that I’m using as reference. I get in the editor its Transform → Location coordinates to use it with ProjectWorldLocationToScreen.

202228-transform-location.png

And here is the C++ code:

FVector2D sLoc;
GetOwningPlayerController()->ProjectWorldLocationToScreen(FVector(530.0f, -6.0f, 871.0f), sLoc);

DrawText(PlayerScoreString, FColor::White, sLoc.X, sLoc.Y, TextFont, TextScale);

But this is what I see:

202229-draw-text.png
202229-draw-text.png1091×647 20 KB

The number 5 is what I draw as text, and the small white vertical rectangle in its left is the cube I selected in the Unreal Editor.

What am I doing wrong? How can I get (or know) the correct World coordinates for the rectangle?

2

Your issue is more likely to be viewport/DPI scaling rather than the static mesh’s location.

There is another version of ProjectWorldLocationToScreen called UWidgetLayoutLibrary::ProjectWorldLocationToWidgetPosition, try that. It accounts for things like viewport/DPI scale//etc which are most likely the cause of your issue.

You’ll need the following include:

#include "Runtime/UMG/Public/Blueprint/WidgetBlueprintLibrary.h"

Although its under UMG, that function doesn’t appear to contain any UMG specific logic so should be applicable for any kind of projection.

3

Thanks a lot. I think so. How can I know the viewport and DPI? I was searching but I haven’t found anything about. Anyway, this is my first game. I’m sure I will come back to modified when I have learned more.

4

By the way, the project is here: https://github.com/ViaCognita/Unreal