/**
* @brief *.stl file binary read function
* @param filePath
* @retval meshList
*/
private TriangleMesh[] ReadBinaryFile(string filePath)
{
List <TriangleMesh> meshList = new List <TriangleMesh>();
int numOfMesh = 0;
int i = 0;
int byteIndex = 0;
byte[] fileBytes = File.ReadAllBytes(filePath);
byte[] temp = new byte[4];
/* 80 bytes title + 4 byte num of triangles + 50 bytes (1 of triangular mesh) */
if (fileBytes.Length > 120)
{
temp[0] = fileBytes[80];
temp[1] = fileBytes[81];
temp[2] = fileBytes[82];
temp[3] = fileBytes[83];
numOfMesh = System.BitConverter.ToInt32(temp, 0);
byteIndex = 84;
for (i = 0; i < numOfMesh; i++)
{
TriangleMesh newMesh = new TriangleMesh();
/* this try-catch block will be reviewed */
try
{
/* face normal */
newMesh.normal1.x = System.BitConverter.ToSingle(new byte[] { fileBytes[byteIndex], fileBytes[byteIndex + 1], fileBytes[byteIndex + 2], fileBytes[byteIndex + 3] }, 0);
byteIndex += 4;
newMesh.normal1.y = System.BitConverter.ToSingle(new byte[] { fileBytes[byteIndex], fileBytes[byteIndex + 1], fileBytes[byteIndex + 2], fileBytes[byteIndex + 3] }, 0);
byteIndex += 4;
newMesh.normal1.z = System.BitConverter.ToSingle(new byte[] { fileBytes[byteIndex], fileBytes[byteIndex + 1], fileBytes[byteIndex + 2], fileBytes[byteIndex + 3] }, 0);
byteIndex += 4;
/* normals of vertex 2 and 3 equals to vertex 1's normals */
newMesh.normal2 = newMesh.normal1;
newMesh.normal3 = newMesh.normal1;
/* vertex 1 */
newMesh.vert1.x = System.BitConverter.ToSingle(new byte[] { fileBytes[byteIndex], fileBytes[byteIndex + 1], fileBytes[byteIndex + 2], fileBytes[byteIndex + 3] }, 0);
byteIndex += 4;
newMesh.vert1.y = System.BitConverter.ToSingle(new byte[] { fileBytes[byteIndex], fileBytes[byteIndex + 1], fileBytes[byteIndex + 2], fileBytes[byteIndex + 3] }, 0);
byteIndex += 4;
newMesh.vert1.z = System.BitConverter.ToSingle(new byte[] { fileBytes[byteIndex], fileBytes[byteIndex + 1], fileBytes[byteIndex + 2], fileBytes[byteIndex + 3] }, 0);
byteIndex += 4;
/* vertex 2 */
newMesh.vert2.x = System.BitConverter.ToSingle(new byte[] { fileBytes[byteIndex], fileBytes[byteIndex + 1], fileBytes[byteIndex + 2], fileBytes[byteIndex + 3] }, 0);
byteIndex += 4;
newMesh.vert2.y = System.BitConverter.ToSingle(new byte[] { fileBytes[byteIndex], fileBytes[byteIndex + 1], fileBytes[byteIndex + 2], fileBytes[byteIndex + 3] }, 0);
byteIndex += 4;
newMesh.vert2.z = System.BitConverter.ToSingle(new byte[] { fileBytes[byteIndex], fileBytes[byteIndex + 1], fileBytes[byteIndex + 2], fileBytes[byteIndex + 3] }, 0);
byteIndex += 4;
/* vertex 3 */
newMesh.vert3.x = System.BitConverter.ToSingle(new byte[] { fileBytes[byteIndex], fileBytes[byteIndex + 1], fileBytes[byteIndex + 2], fileBytes[byteIndex + 3] }, 0);
byteIndex += 4;
newMesh.vert3.y = System.BitConverter.ToSingle(new byte[] { fileBytes[byteIndex], fileBytes[byteIndex + 1], fileBytes[byteIndex + 2], fileBytes[byteIndex + 3] }, 0);
byteIndex += 4;
newMesh.vert3.z = System.BitConverter.ToSingle(new byte[] { fileBytes[byteIndex], fileBytes[byteIndex + 1], fileBytes[byteIndex + 2], fileBytes[byteIndex + 3] }, 0);
byteIndex += 4;
byteIndex += 2; // Attribute byte count
}
catch
{
processError = true;
break;
}
meshList.Add(newMesh);
}
}
else
{
// nitentionally left blank
}
return(meshList.ToArray());
}
/**
* @brief *.stl file ascii read function
* @param filePath
* @retval meshList
*/
private TriangleMesh[] ReadASCIIFile(string filePath)
{
List <TriangleMesh> meshList = new List <TriangleMesh>();
StreamReader txtReader = new StreamReader(filePath);
string lineString;
while (!txtReader.EndOfStream)
{
lineString = txtReader.ReadLine().Trim(); /* delete whitespace in front and tail of the string */
string[] lineData = lineString.Split(' ');
if (lineData[0] == "solid")
{
while (lineData[0] != "endsolid")
{
lineString = txtReader.ReadLine().Trim(); // facetnormal
lineData = lineString.Split(' ');
if (lineData[0] == "endsolid") // check if we reach at the end of file
{
break;
}
TriangleMesh newMesh = new TriangleMesh(); // define new mesh object
/* this try-catch block will be reviewed */
try
{
// FaceNormal
newMesh.normal1.x = float.Parse(lineData[2]);
newMesh.normal1.y = float.Parse(lineData[3]);
newMesh.normal1.z = float.Parse(lineData[4]);
/* normals of vertex 2 and 3 equals to vertex 1's normals */
newMesh.normal2 = newMesh.normal1;
newMesh.normal3 = newMesh.normal1;
//----------------------------------------------------------------------
lineString = txtReader.ReadLine(); // Just skip the OuterLoop line
//----------------------------------------------------------------------
// Vertex1
lineString = txtReader.ReadLine().Trim();
/* reduce spaces until string has proper format for split */
while (lineString.IndexOf(" ") != -1)
{
lineString = lineString.Replace(" ", " ");
}
lineData = lineString.Split(' ');
newMesh.vert1.x = float.Parse(lineData[1]); // x1
newMesh.vert1.y = float.Parse(lineData[2]); // y1
newMesh.vert1.z = float.Parse(lineData[3]); // z1
// Vertex2
lineString = txtReader.ReadLine().Trim();
/* reduce spaces until string has proper format for split */
while (lineString.IndexOf(" ") != -1)
{
lineString = lineString.Replace(" ", " ");
}
lineData = lineString.Split(' ');
newMesh.vert2.x = float.Parse(lineData[1]); // x2
newMesh.vert2.y = float.Parse(lineData[2]); // y2
newMesh.vert2.z = float.Parse(lineData[3]); // z2
// Vertex3
lineString = txtReader.ReadLine().Trim();
/* reduce spaces until string has proper format for split */
while (lineString.IndexOf(" ") != -1)
{
lineString = lineString.Replace(" ", " ");
}
lineData = lineString.Split(' ');
newMesh.vert3.x = float.Parse(lineData[1]); // x3
newMesh.vert3.y = float.Parse(lineData[2]); // y3
newMesh.vert3.z = float.Parse(lineData[3]); // z3
}
catch
{
processError = true;
break;
}
//----------------------------------------------------------------------
lineString = txtReader.ReadLine(); // Just skip the endloop
//----------------------------------------------------------------------
lineString = txtReader.ReadLine(); // Just skip the endfacet
meshList.Add(newMesh); // add mesh to meshList
} // while linedata[0]
} // if solid
} // while !endofstream
return(meshList.ToArray());
}
/**
* @brief *.stl file ascii read function
* @param filePath
* @retval meshList
*/
private TriangleMesh[] ReadASCIIFile(string filePath)
{
List <TriangleMesh> meshList = new List <TriangleMesh>();
StreamReader txtReader = new StreamReader(filePath);
string line;
while (!txtReader.EndOfStream)
{
line = txtReader.ReadLine().Trim().Replace(" ", "");
switch (line)
{
case "solid":
while (line != "endsolid")
{
line = txtReader.ReadLine().Trim().Replace(" ", ""); //facetnormal
if (line == "endsolid") // Son satır endsolid denetlemesi
{
break;
}
TriangleMesh newMesh = new TriangleMesh(); // define new mesh object
/* this try-catch block will be reviewed */
try
{
// FaceNormal
newMesh.normal1.x = float.Parse(line.Substring(11, 14));
newMesh.normal1.y = float.Parse(line.Substring(25, 14));
newMesh.normal1.z = float.Parse(line.Substring(39, 14));
/* normals of vertex 2 and 3 equals to vertex 1's normals */
newMesh.normal2 = newMesh.normal1;
newMesh.normal3 = newMesh.normal1;
//----------------------------------------------------------------------
line = txtReader.ReadLine().Trim().Replace(" ", ""); // OuterLoop
//----------------------------------------------------------------------
// Vertex1
line = txtReader.ReadLine().Trim().Replace(" ", "");
newMesh.vert1.x = float.Parse(line.Substring(6, 14)); //x1
newMesh.vert1.y = float.Parse(line.Substring(20, 14)); // y1
newMesh.vert1.z = float.Parse(line.Substring(34, 14)); // z1
// Vertex2
line = txtReader.ReadLine().Trim().Replace(" ", "");
newMesh.vert2.x = float.Parse(line.Substring(6, 14)); //x1
newMesh.vert2.y = float.Parse(line.Substring(20, 14)); // y1
newMesh.vert2.z = float.Parse(line.Substring(34, 14)); // z1
// Vertex3
line = txtReader.ReadLine().Trim().Replace(" ", "");
newMesh.vert3.x = float.Parse(line.Substring(6, 14)); //x1
newMesh.vert3.y = float.Parse(line.Substring(20, 14)); // y1
newMesh.vert3.z = float.Parse(line.Substring(34, 14)); // z1
}
catch
{
processError = true;
break;
}
//----------------------------------------------------------------------
line = txtReader.ReadLine().Trim().Replace(" ", ""); // endfacet or EndLoop
meshList.Add(newMesh); // add mesh to meshList
}
break;
default:
// intentionally left blank
break;
}
}
return(meshList.ToArray());
}
