Why is coding complex features like a custom roof tool in games so challenging?

Mapping 3D space to a 2D view and back isn’t an easy task at all. I studied computer information systems back when 3D graphics were just starting, and we had to do a lot of this manually. Unless you break down the math for each display frame, it’s tough to grasp the sheer amount of work involved. Simplifying things can sometimes make it even more complicated for the user.

Whenever someone says "this should be simple," it usually means it’s going to be anything but simple! It involves a lot of math and understanding of 3D space and geometry to do it correctly.

The geometry math for this can get really complicated. You're essentially asking the computer to determine the shape you want based on random points in space. Think about trying to guess what someone has drawn just from where they touched the paper with their pen! Plus, you’ll need algorithms for mesh generation that can handle quirky point placements, and real-time collision detection to prevent the roof from clipping through walls. I’ve worked in IT, and even basic 3D calculations can be tough to wrap your head around. Debugging something like this is a whole other level, especially when players place points in unexpected ways.

Understanding the problem and letting players experiment can be tricky. Try to write out clear instructions for how to create the roof, then give them to someone who knows nothing about roofing along with the specified points. If both you and they follow those instructions, you should get identical results with the same inputs. This exercise can help unpack the complexities of programming such a feature.

You might be overthinking the approach! Some games handle this easily by not allowing completely random point placements. Instead, they let players adjust parameters to define the roof. For example, you could start with a flat 2D shape and then let players tweak the height or curvature. This method simplifies things because you only have to make sure the inputs are valid and manageable. Check out games like 'Tiny Glade' for inspiration on how they're doing it.