private static MashTrigle GetMashTrigle(string fname)
{
MashTrigle result = new MashTrigle();
using (FileStream fs = new FileStream(fname, FileMode.Open)) {
using (BinaryReader reader = new BinaryReader(fs)) {
long flen = fs.Length;
if (flen % 108 != 0)
{
throw new Exception("不是正确的文件");
}
int facecount = (int)(flen / 108);
TrigleFace[] trigles = new TrigleFace[facecount];
for (int i = 0; i < facecount; i++)
{
Vector3f v0, v1, v2, vt0, vt1, vt2, vn0, vn1, vn2;
v0 = ReadAVector(reader);
vt0 = ReadAVector(reader);
vn0 = ReadAVector(reader);
v1 = ReadAVector(reader);
vt1 = ReadAVector(reader);
vn1 = ReadAVector(reader);
v2 = ReadAVector(reader);
vt2 = ReadAVector(reader);
vn2 = ReadAVector(reader);
TrigleFace face = new TrigleFace(v0, v1, v2)
{
sp0 = new Vector2f(vt0.X, vt0.Y),
sp1 = new Vector2f(vt1.X, vt1.Y),
sp2 = new Vector2f(vt2.X, vt2.Y),
n0 = vn0,
n1 = vn1,
n2 = vn2
};
trigles[i] = face;
}
result.SetTrigles(trigles);
}
}
return(result);
}
static TrigleFace[] Smooth(List <PW_Trigle> faces, List <Vector3f> v, List <Vector2f> vt, Dictionary <int, List <PW_Trigle> > faceList)
{
if (faces == null || faces.Count == 0)
{
return(null);
}
Dictionary <int, Vector3f> pointNormal = new Dictionary <int, Vector3f>();
TrigleFace[] re = new TrigleFace[faces.Count];
foreach (KeyValuePair <int, List <PW_Trigle> > kv in faceList)
{
Vector3f n = new Vector3f();
foreach (PW_Trigle trigle in kv.Value)
{
n += trigle.Normal;
}
n = Vector3f.Normalize(n);
pointNormal[kv.Key] = n;
}
int idx = 0;
foreach (PW_Trigle trigle in faces)
{
TrigleFace t = new TrigleFace(v[trigle.v0], v[trigle.v1], v[trigle.v2]);
t.sp0 = vt[trigle.vt0];
t.sp1 = vt[trigle.vt1];
t.sp2 = vt[trigle.vt2];
t.n0 = pointNormal[trigle.v0];
t.n1 = pointNormal[trigle.v1];
t.n2 = pointNormal[trigle.v2];
re[idx] = t;
idx++;
}
return(re);
}
public static MashTrigle[] LoadModel(string filePath, bool negativeZ = false)
{
string[] lines = File.ReadAllLines(filePath);
List <MashTrigle> mashes = new List <MashTrigle>();
List <Vector3f> v = new List <Vector3f>()
{
new Vector3f()
};
List <Vector2f> vt = new List <Vector2f>()
{
new Vector2f()
};
List <Vector3f> vn = new List <Vector3f>()
{
new Vector3f()
};
MashTrigle nobj = null;
List <TrigleFace> trigles = new List <TrigleFace>();
for (int linecount = 0; linecount < lines.Length; linecount++)
{
string line = lines[linecount];
if (string.IsNullOrWhiteSpace(line) || line.StartsWith('#'))
{
continue;
}
float p0 = 0.0f, p1 = 0.0f, p2 = 0.0f;
string[] parts = line.Split(LineSplitChars, StringSplitOptions.RemoveEmptyEntries);
switch (parts[0].ToLower())
{
case "v":
#region v
if (parts.Length != 4)
{
throw new Exception($"line {linecount} : 缺少参数的行，请求3个，实际为{parts.Length - 1}个");
}
if (!Float.TryParse(parts[1], out p0))
{
throw new Exception($"line {linecount} : 不能转换的数据 {parts[1]}");
}
if (!Float.TryParse(parts[2], out p1))
{
throw new Exception($"line {linecount} : 不能转换的数据 {parts[2]}");
}
if (!Float.TryParse(parts[3], out p2))
{
throw new Exception($"line {linecount} : 不能转换的数据 {parts[3]}");
}
if (negativeZ)
{
v.Add(new Vector3f(p0, p1, -p2));
}
else
{
v.Add(new Vector3f(p0, p1, p2));
}
#endregion
break;
case "vt":
#region vt
if (parts.Length != 3 && parts.Length != 4)
{
throw new Exception($"line {linecount} : 缺少参数的行，请求2或3个，实际为{parts.Length - 1}个");
}
if (!Float.TryParse(parts[1], out p0))
{
throw new Exception($"line {linecount} : 不能转换的数据 {parts[1]}");
}
if (!Float.TryParse(parts[2], out p1))
{
throw new Exception($"line {linecount} : 不能转换的数据 {parts[2]}");
}
vt.Add(new Vector2f(p0, p1));
#endregion
break;
case "vn":
#region vn
if (parts.Length != 4)
{
throw new Exception($"line {linecount} : 缺少参数的行，请求3个，实际为{parts.Length - 1}个");
}
if (!Float.TryParse(parts[1], out p0))
{
throw new Exception($"line {linecount} : 不能转换的数据 {parts[1]}");
}
if (!Float.TryParse(parts[2], out p1))
{
throw new Exception($"line {linecount} : 不能转换的数据 {parts[2]}");
}
if (!Float.TryParse(parts[3], out p2))
{
throw new Exception($"line {linecount} : 不能转换的数据 {parts[3]}");
}
if (negativeZ)
{
vn.Add(Vector3f.Normalize(new Vector3f(p0, p1, -p2)));
}
else
{
vn.Add(Vector3f.Normalize(new Vector3f(p0, p1, p2)));
}
#endregion
break;
case "vp":
break;
case "g":
#region g
if (trigles != null && trigles.Count > 0)
{
if (nobj == null)
{
nobj = new MashTrigle();
}
nobj.SetTrigles(trigles.ToArray());
mashes.Add(nobj);
}
nobj = new MashTrigle();
trigles = new List <TrigleFace>();
#endregion
break;
case "f":
#region f
if (parts.Length < 4)
{
throw new Exception($"line {linecount} : 缺少参数的行，请求至少为3个，实际为{parts.Length - 1}个");
}
int pointcount = parts.Length - 1;
int[] vidx = new int[pointcount], vtidx = new int[pointcount], vnidx = new int[pointcount];
// 分割顶点信息
for (int i = 0; i < pointcount; i++)
{
string pinfo = parts[i + 1];
string[] infos = pinfo.Split(PInfoSplitChars);
vidx[i] = int.Parse(infos[0]);
int tmp;
if (infos.Length > 1 && int.TryParse(infos[1], out tmp))
{
vtidx[i] = tmp;
}
else
{
vtidx[i] = -1;
}
if (infos.Length > 2 && int.TryParse(infos[1], out tmp))
{
vnidx[i] = tmp;
}
else
{
vnidx[i] = -1;
}
}
// 生成三角形面
for (int i = 2; i < pointcount; i++)
{
TrigleFace face = new TrigleFace(v[vidx[0]], v[vidx[i - 1]], v[vidx[i]]);
{ //normal
Vector3f facenormal = new Vector3f();
if (vnidx[0] == -1 || vnidx[i - 1] == -1 || vnidx[i] == -1)
{
facenormal = Vector3f.Normalize(Vector3f.Cross(face.e1, face.e2));
}
if (vnidx[0] == -1)
{
face.n0 = facenormal;
}
else
{
face.n0 = vn[vnidx[0]];
}
if (vnidx[i - 1] == -1)
{
face.n1 = facenormal;
}
else
{
face.n1 = vn[vnidx[i - 1]];
}
if (vnidx[i] == -1)
{
face.n2 = facenormal;
}
else
{
face.n2 = vn[vnidx[i]];
}
}
{ //sp
if (vtidx[0] != -1)
{
face.sp0 = vt[vtidx[0]];
}
if (vtidx[i - 1] != -1)
{
face.sp1 = vt[vtidx[i - 1]];
}
if (vtidx[i] != -1)
{
face.sp2 = vt[vtidx[i]];
}
}
trigles.Add(face);
}
#endregion
break;
}
}
if (trigles != null && trigles.Count > 0)
{
if (nobj == null)
{
nobj = new MashTrigle();
}
nobj.SetTrigles(trigles.ToArray());
mashes.Add(nobj);
}
return(mashes.ToArray());
}
