Hello I want to rotate my cube with mouse like in editor
my blueprint
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To break down the problem, you’ll need to:
- On Left-Mouse Button: get mouse position, convert from screen to world, and trace out to see what actors are under the mouse.
- Store the actor somewhere as your ‘selected’ actor.
- When an actor is selected, create a gizmo for it. I’ve not messed with creating gizmos, but I see there is some functionality available for them in UE4, plus there appear to be a few on the marketplace as well. Worst case, you could probably create one yourself made up of a few planes with transparent textures.
- Then, on Left-Mouse Button: trace against specifically the gizmo (drag off the actor or component and look for LineTraceSingle). determine which axis you want to rotate along.
- The gizmo may have separate components for each axis, so you can use the trace’s HitComponent to tell which axis component the mouse is over.
- You could possibly determine it from the trace’s HitLocation relative to the hit actor, or from the ImpactNormal.
- Not the best option, but you might could even use the hit PhysMaterial.
- As long as the button is held down over the gizmo: on mouse movement, multiply the positive and negative movement along one or both mouse axes by a scalar (to adjust the ‘speed’ of rotation). That gives you a delta to apply to the Actor’s rotation axis. Then you can GetActorRotation, apply the delta to the desired axis, and SetActorRotation.
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Better?
And thanks