TriangleUtil.cs
1.13 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
using System;
using System.Linq;
using System.Collections.Generic;
public static class TriangleUtil
{
public static IEnumerable<int> FlipTriangle(IEnumerable<Byte> src)
{
return FlipTriangle(src.Select(x => (Int32)x));
}
public static IEnumerable<int> FlipTriangle(IEnumerable<UInt16> src)
{
return FlipTriangle(src.Select(x => (Int32)x));
}
public static IEnumerable<int> FlipTriangle(IEnumerable<UInt32> src)
{
return FlipTriangle(src.Select(x => (Int32)x));
}
public static IEnumerable<int> FlipTriangle(IEnumerable<Int32> src)
{
var it = src.GetEnumerator();
while (true)
{
if (!it.MoveNext())
{
yield break;
}
var i0 = it.Current;
if (!it.MoveNext())
{
yield break;
}
var i1 = it.Current;
if (!it.MoveNext())
{
yield break;
}
var i2 = it.Current;
yield return i2;
yield return i1;
yield return i0;
}
}
}