How to line trace from the viewport in C++?

Development Programming & Scripting C++
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1

I wish to fire a linetrace thowards the point clicked in the viewport. Unity had a handy method for obtaining a ray from a scren point and then you could use that as the end argument of a line trace.

Unity method I mentioned:

2

Ah, perhaps you didn’t notice the tag, the question is C++ related. I’ll update the question to reflect that better.

3

If you want to linetrace in editor you need to do get editor world instance

4

In unreal actors have OnClicked event so dont need to setup ione tracing if you want , it requires conclusion on actor

5

I found that just as I replied to your answer but didn’t get around to test it before I headed outside. Anyway, thanks for confirming!

6

Convert screen location to world space

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8

I gave the gist.
it does not matter if the solution is described via a flowchart or BP or some pseudocodes.

if you would search about the hint I gave you, you would certainly find

bool APlayerController::DeprojectScreenPositionToWorld(float ScreenX, float ScreenY, FVector& WorldLocation, FVector& WorldDirection) const;

And

 bool APlayerController::GetHitResultAtScreenPosition(const FVector2D ScreenPosition, const ECollisionChannel TraceChannel, bool bTraceComplex, FHitResult& HitResult) const

On the internet

Cheers

9

https://answers.unrealengine.com/questions/115748/c-equivalent-of-convert-mouse-location-to-world-sp.html

10

Hello! All stuff can be found in PlayerController