public static bool loadModelSTL_ascii(SimpleModel simpleModel, string filename, FMatrix3x3 matrix)
{
SimpleVolume vol = new SimpleVolume();
using (StreamReader f = new StreamReader(filename))
{
// check for "SOLID"
FPoint3 vertex = new FPoint3();
int n = 0;
Point3 v0 = new Point3(0, 0, 0);
Point3 v1 = new Point3(0, 0, 0);
Point3 v2 = new Point3(0, 0, 0);
string line = f.ReadLine();
Regex onlySingleSpaces = new Regex("\\s+", RegexOptions.Compiled);
while (line != null)
{
line = onlySingleSpaces.Replace(line, " ");
var parts = line.Trim().Split(' ');
if (parts[0].Trim() == "vertex")
{
vertex.x = Convert.ToDouble(parts[1]);
vertex.y = Convert.ToDouble(parts[2]);
vertex.z = Convert.ToDouble(parts[3]);
// change the scale from mm to micrometers
vertex *= 1000.0;
n++;
switch (n)
{
case 1:
v0 = matrix.apply(vertex);
break;
case 2:
v1 = matrix.apply(vertex);
break;
case 3:
v2 = matrix.apply(vertex);
vol.addFaceTriangle(v0, v1, v2);
n = 0;
break;
}
}
line = f.ReadLine();
}
}
if (vol.faceTriangles.Count > 3)
{
simpleModel.volumes.Add(vol);
return true;
}
return false;
}
public static bool loadModelFromFile(SimpleModel simpleModel, string filename, FMatrix3x3 matrix)
{
if (!loadModelSTL_ascii(simpleModel, filename, matrix))
{
return loadModelSTL_binary(simpleModel, filename, matrix);
}
return true;
}
public OptimizedModel(SimpleModel model)
{
for (int i = 0; i < model.volumes.Count; i++)
{
volumes.Add(new OptimizedVolume(model.volumes[i], this));
if (MatterSlice.Canceled)
{
return;
}
}
}
static SimpleModel loadModelSTL_binary(string filename, FMatrix3x3 matrix)
{
SimpleModel m = new SimpleModel();
using (FileStream stlStream = File.Open(filename, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
{
// load it as a binary stl
// skip the first 80 bytes
// read in the number of triangles
stlStream.Position = 0;
BinaryReader br = new BinaryReader(stlStream);
byte[] fileContents = br.ReadBytes((int)stlStream.Length);
int currentPosition = 80;
uint numTriangles = System.BitConverter.ToUInt32(fileContents, currentPosition);
long bytesForNormals = numTriangles * 3 * 4;
long bytesForVertices = numTriangles * 3 * 4;
long bytesForAttributs = numTriangles * 2;
currentPosition += 4;
long numBytesRequiredForVertexData = currentPosition + bytesForNormals + bytesForVertices + bytesForAttributs;
if (fileContents.Length < numBytesRequiredForVertexData || numTriangles < 4)
{
stlStream.Close();
return(null);
}
m.volumes.Add(new SimpleVolume());
SimpleVolume vol = m.volumes[0];
Point3[] vector = new Point3[3];
for (int i = 0; i < numTriangles; i++)
{
// skip the normal
currentPosition += 3 * 4;
for (int j = 0; j < 3; j++)
{
vector[j] = new Point3(
System.BitConverter.ToSingle(fileContents, currentPosition + 0 * 4) * 1000,
System.BitConverter.ToSingle(fileContents, currentPosition + 1 * 4) * 1000,
System.BitConverter.ToSingle(fileContents, currentPosition + 2 * 4) * 1000);
currentPosition += 3 * 4;
}
currentPosition += 2; // skip the attribute
vol.addFaceTriangle(vector[2], vector[1], vector[0]);
}
}
return(m);
}
public void SetPositionAndSize(SimpleModel model, long xCenter_um, long yCenter_um, long zClip_um, bool centerObjectInXy)
{
minXYZ_um = model.minXYZ_um();
maxXYZ_um = model.maxXYZ_um();
if (centerObjectInXy)
{
Point3 modelXYCenterZBottom_um = new Point3((minXYZ_um.x + maxXYZ_um.x) / 2, (minXYZ_um.y + maxXYZ_um.y) / 2, minXYZ_um.z);
modelXYCenterZBottom_um -= new Point3(xCenter_um, yCenter_um, zClip_um);
for (int i = 0; i < volumes.Count; i++)
{
for (int n = 0; n < volumes[i].vertices.Count; n++)
{
volumes[i].vertices[n].position -= modelXYCenterZBottom_um;
}
}
minXYZ_um -= modelXYCenterZBottom_um;
maxXYZ_um -= modelXYCenterZBottom_um;
}
else // we still need to put in the bottom clip
{
// Ofset by bed center and correctly position in z
Point3 modelZBottom_um = new Point3(-xCenter_um, -yCenter_um, minXYZ_um.z - zClip_um);
for (int i = 0; i < volumes.Count; i++)
{
for (int n = 0; n < volumes[i].vertices.Count; n++)
{
volumes[i].vertices[n].position -= modelZBottom_um;
}
}
minXYZ_um -= modelZBottom_um;
maxXYZ_um -= modelZBottom_um;
}
size_um = maxXYZ_um - minXYZ_um;
}
private static bool loadModelSTL_binary(SimpleModel simpleModel, string filename, FMatrix3x3 matrix)
{
SimpleVolume vol = new SimpleVolume();
using (FileStream stlStream = File.Open(filename, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
{
// load it as a binary stl
// skip the first 80 bytes
// read in the number of triangles
stlStream.Position = 0;
BinaryReader br = new BinaryReader(stlStream);
byte[] fileContents = br.ReadBytes((int)stlStream.Length);
int currentPosition = 80;
uint numTriangles = System.BitConverter.ToUInt32(fileContents, currentPosition);
long bytesForNormals = numTriangles * 3 * 4;
long bytesForVertices = numTriangles * 3 * 4;
long bytesForAttributs = numTriangles * 2;
currentPosition += 4;
long numBytesRequiredForVertexData = currentPosition + bytesForNormals + bytesForVertices + bytesForAttributs;
if (fileContents.Length < numBytesRequiredForVertexData || numTriangles < 4)
{
stlStream.Close();
return false;
}
Point3[] vector = new Point3[3];
for (int i = 0; i < numTriangles; i++)
{
// skip the normal
currentPosition += 3 * 4;
for (int j = 0; j < 3; j++)
{
vector[j] = new Point3(
System.BitConverter.ToSingle(fileContents, currentPosition + 0 * 4) * 1000,
System.BitConverter.ToSingle(fileContents, currentPosition + 1 * 4) * 1000,
System.BitConverter.ToSingle(fileContents, currentPosition + 2 * 4) * 1000);
currentPosition += 3 * 4;
}
currentPosition += 2; // skip the attribute
vol.addFaceTriangle(vector[2], vector[1], vector[0]);
}
}
if (vol.faceTriangles.Count > 3)
{
simpleModel.volumes.Add(vol);
return true;
}
return false;
}