The ROADS_ has two sidewalks and area for cars, so (numbers are vertexes, letters are faces):
1. when you are using 8 vertexes it must have 6 faces
Code: Select all
1-----2-----3-----4
|A /|C /|E /|
| / | / | / |
|/ B |/D |/ F |
4-----6-----7-----8
2. when you are using 12 vertexes it must have 12 faces
Code: Select all
1-----2-----3-----4
|A /|C /|E /|
| / | / | / |
|/ B |/D |/ F |
4-----6-----7-----8
|G /|I /|K /|
| / | / | / |
|/ H |/J |/ L |
9----10----11----12
3. when you are using 16 vertexes it must have 18 faces
Code: Select all
1-----2-----3-----4
|A /|C /|E /|
| / | / | / |
|/ B |/D |/ F |
4-----6-----7-----8
|G /|I /|K /|
| / | / | / |
|/ H |/J |/ L |
9----10----11----12
|M /|O /|Q /|
| / | / | / |
|/ N |/P |/ R |
13---14----15----16
So the pattern is:
Fn = (Vn / 4 - 1) * 6
where:
Fn - faces count
Vn - vertexes count
(Vn / 4 - 1) - number of segments (each segment has 6 faces)
Is it clear?
If your ROADS_ doesn't match it, there is something wrong with your object (or with my calculations )