Cutting Holes in Curves

(drewslater) #1

I have constructed a tunnel using an endcap. Is there any way to cut a hole in the the tunnel so I can have entrances in the middle of the tunnel? I know CSG subtract does not work on curves so is there another way? If its not clear what I’m asking then I can take a screenshot. Thanks.

ATS

(SCDS_reyalP) #2

You can use vertex edit (v). You might also find the split and merge patches buttons on the bottom toolbar helpful.

(damocles) #3

You can’t actually cut away form patches/curves in that sense, but as Reyalp says, splitting them, or adding new ones and using the vertex edit tool will allow you to make the necessary holes.

(drewslater) #4

It took a minute but I now see how the merge/split patch functions work. I am still having problems acheiving what I want with the tunnel. Here is a shot from radiant of what I am trying to achieve.

Hope that image is posted correctly. As you can see I am trying to have a clean intersection of the dark colored tunnel into the larger, lighter colored tunnel. Is this possible to achieve by manipulating the verticies? I have tried splitting the large tunnel and and manipulating verts on the side where the dark tunnel will intersect but I cannot get it to come out right. There are always parts that do not match up. If this is possible can anyone point me in the right direction? Thanks.

ATS

(damocles) #5

It’s difficult to match up two curves that are different heights like you have there. I would recommend making them both the same height. Then for the side of the main tunnel that does not join another tunnel, make it out of a single bevel. Then make the other side out of several bevels that fit the shape of the second tunnel.

It’s tricky. but practice and play around to get a feel for how patches shape themselves to the vertices and you’ll manage it in the end.

(joop sloop) #6

Or you could try to cut up the big archway into 2 pieces, and add a special curvepatch to where the 2 tunnels meet.

For my map I’m building I have a big dome merge over into an even bigger arch. so it should be possible…

(cremator) #7

In a sense its impossible to cut like you are trying, however, you could make your tunnel, then build a patch around it.