My goal is to create a half-section of an arbitrary potato with smooth surfaces. I am creating a curve and surface using the journal file:
create vertex 350 170 0 # 1
create vertex 350 182 0 # 2 (added to flatten right end)
create vertex 340 195 0 # 3
create vertex 320 208 0 # 4
create vertex 290 218 0 # 5
create vertex 250 214 0 # 6
create vertex 210 222 0 # 7
create vertex 175 232 0 # 8
create vertex 145 226 0 # 9
create vertex 125 212 0 #10
create vertex 112 198 0 #11
Left end region (flatter)
create vertex 105 185 0 #12
create vertex 105 170 0 #13 (flat left face region)
create vertex 110 158 0 #14
create vertex 125 145 0 #15
create vertex 150 135 0 #16
create vertex 185 128 0 #17
create vertex 225 130 0 #18
create vertex 270 125 0 #19
create vertex 310 132 0 #20
create vertex 335 148 0 #21
create vertex 350 170 0 #22 (close)
Closed smooth spline
create curve spline vertex 1 to 22
Create surface
create surface curve 1
Then I sweep the surface to create volume like this:
Apparently, the curve and lateral surface are not smooth and closed. Therefore, we can see the vertical line on the volume. How can I make this smooth so that the vertical line does not appear? Additionally, how can we make the bottom smooth and curved instead of flat?