First Person Character
Quick test of an Interactive Replacement Blueprint, in this case, swapping chair parts in real time. But this isn't just for furniture; it can be applied in industrial environments, like 3D digital factories, where users can swap machinery components, test layouts, etc.
The key takeaway from this experiment? Line tracing and Modular design with Blueprint Actor Components. By structuring it this way, the same functionality can be easily applied to any interactive element, making it highly scalable and reusable.
The main features easy to solve, and I got this running pretty quickly. Still, there are always things to improve and lessons to carry into future projects. Once I had the core mechanics working, I like to stress-test the system and push its limits—for example, what happens if I have multiple actors close together that can be replaced? Which one will the code pick up? Both!
This turned out to be one of the most interesting challenges of the project. I implemented two interaction systems:
Collision-based interaction – When the player enters the chair’s collision volume, it triggers the "Press E Key" prompt.
If the player enters two collision volumes at the same time, it would trigger two menus, making it unclear which asset was being replaced since there was no visual indicator of which volume was entered first.
This led to some fun problem-solving, and I’ll be refining the approach in the next iteration!
First Person Character
also implemented a more efficient selection method. The previous approach required interesting problem-solving
but had drawbacks, like needing to intersect the volume. With line tracing, this isn’t necessary, eliminating distance check.
Users simply aim at the actor they want to change.
This also simplifies adding other replaceable elements, like walls, without relying on collisions.
Line Tracing Method
I enjoy these quick projects—they're often the best way to experiment with new ideas and test different solutions.
Working with UI Widgets has also been very rewarding, and for larger projects, considering the modularity of the UI is essential.
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