/// <summary>
/// Reads material file</summary>
/// <param name="filename">Material file pathname</param>
public void Read(string filename)
{
if (string.IsNullOrEmpty(filename))
throw new ArgumentNullException("filename");
StreamReader reader = null;
if (!File.Exists(filename))
return;
try
{
// Create an instance of StreamReader to read from a file.
reader = new StreamReader(filename);
string buf;
bool isValid = false;
MaterialDef currentMtl = null;
while ((buf = reader.ReadLine()) != null)
{
buf = buf.Trim();
if (string.IsNullOrEmpty(buf)) continue;
if (buf[0] == '#') continue;
string[] split = buf.Split(s_stringDelimiters, StringSplitOptions.RemoveEmptyEntries);
switch (buf[0])
{
case 'n': // newmtl name
if (split.Length >= 2)
{
string newMtl = split[1];
// Check for duplicate material
if (!Materials.ContainsKey(newMtl))
{
// Create a new material
currentMtl = new MaterialDef(newMtl);
Materials.Add(newMtl, currentMtl);
isValid = true;
}
else
isValid = false;
}
break;
case 'K': // k* r g b
if (isValid && split.Length == 4)
switch (buf[1])
{
case 'a': // ambient
currentMtl.Ambient = new Vec4F(
float.Parse(split[1]),
float.Parse(split[2]),
float.Parse(split[3]),
1.0f);
break;
case 'd': // diffuse
currentMtl.Diffuse = new Vec4F(
float.Parse(split[1]),
float.Parse(split[2]),
float.Parse(split[3]),
1.0f);
break;
case 's': // specular
currentMtl.Specular = new Vec4F(
float.Parse(split[1]),
float.Parse(split[2]),
float.Parse(split[3]),
1.0f);
break;
}
else
throw new Exception(string.Format("Error parsing k{0} in file: {1}", buf[1], filename));
break;
case 'N': // Ns shininess
if (isValid && split.Length == 2 && buf[1] == 's')
currentMtl.Shininess = float.Parse(split[1]);
break;
case 'm': // map_Kd texture
if (isValid && split.Length == 2 && split[0].Equals("map_Kd"))
currentMtl.TextureName = split[1];
break;
case 'd': // d alpha
case 'T': // Tf r g b or Tr alpha
if (isValid && split.Length <= 4 && (buf[0] == 'd' || buf[1] == 'f' || buf[1] == 'r'))
currentMtl.Alpha = float.Parse(split[1]);
break;
default:
break;
}
}
}
finally
{
if (reader != null)
reader.Close();
}
}
/// <summary>
/// Reads material file</summary>
/// <param name="filename">Material file pathname</param>
public void Read(string filename)
{
if (string.IsNullOrEmpty(filename))
{
throw new ArgumentNullException("filename");
}
StreamReader reader = null;
if (!File.Exists(filename))
{
return;
}
try
{
// Create an instance of StreamReader to read from a file.
reader = new StreamReader(filename);
string buf;
bool isValid = false;
MaterialDef currentMtl = null;
while ((buf = reader.ReadLine()) != null)
{
buf = buf.Trim();
if (string.IsNullOrEmpty(buf))
{
continue;
}
if (buf[0] == '#')
{
continue;
}
string[] split = buf.Split(s_stringDelimiters, StringSplitOptions.RemoveEmptyEntries);
switch (buf[0])
{
case 'n': // newmtl name
if (split.Length >= 2)
{
string newMtl = split[1];
// Check for duplicate material
if (!Materials.ContainsKey(newMtl))
{
// Create a new material
currentMtl = new MaterialDef(newMtl);
Materials.Add(newMtl, currentMtl);
isValid = true;
}
else
{
isValid = false;
}
}
break;
case 'K': // k* r g b
if (isValid && split.Length == 4)
{
switch (buf[1])
{
case 'a': // ambient
currentMtl.Ambient = new Vec4F(
float.Parse(split[1]),
float.Parse(split[2]),
float.Parse(split[3]),
1.0f);
break;
case 'd': // diffuse
currentMtl.Diffuse = new Vec4F(
float.Parse(split[1]),
float.Parse(split[2]),
float.Parse(split[3]),
1.0f);
break;
case 's': // specular
currentMtl.Specular = new Vec4F(
float.Parse(split[1]),
float.Parse(split[2]),
float.Parse(split[3]),
1.0f);
break;
}
}
else
{
throw new Exception(string.Format("Error parsing k{0} in file: {1}", buf[1], filename));
}
break;
case 'N': // Ns shininess
if (isValid && split.Length == 2 && buf[1] == 's')
{
currentMtl.Shininess = float.Parse(split[1]);
}
break;
case 'm': // map_Kd texture
if (isValid && split.Length == 2 && split[0].Equals("map_Kd"))
{
currentMtl.TextureName = split[1];
}
break;
case 'd': // d alpha
case 'T': // Tf r g b or Tr alpha
if (isValid && split.Length <= 4 && (buf[0] == 'd' || buf[1] == 'f' || buf[1] == 'r'))
{
currentMtl.Alpha = float.Parse(split[1]);
}
break;
default:
break;
}
}
}
finally
{
if (reader != null)
{
reader.Close();
}
}
}
