public void ParseElementBinaryLittleEndian(byte[] bytes, int bytesOffset,
out int bytesUsed, out List <int> triangles)
{
if (NElement == 0)
{
bytesUsed = 0;
triangles = null;
return;
}
var listProperty = DictProperties["vertex_indices"] as PlyListProperty;
bytesUsed = PlyProperty.GetDataBytes(listProperty.CountNumFormat) + NElement * 3 * PlyProperty.GetDataBytes(listProperty.ValueNumFormat);
triangles = new List <int>();
int facesRead = 0;
int bytesRead = 0;
int bytesPerTriangleIndex = 4;
CoordinateType coordType = _plyHeader.GlobalMeshInfoElement.GetCoordinateType();
int[] triangle = new int[3];
while (facesRead < NElement)
{
var faceIndex = bytesOffset + bytesRead;
var indexCount = bytes[faceIndex];
if (indexCount == 3)
{
for (int i = 0; i < indexCount; ++i)
{
triangle[i] = System.BitConverter.ToInt32(PlyElement.GetBytesSubarray(bytes, faceIndex + 1 + i * bytesPerTriangleIndex, bytesPerTriangleIndex), 0);
}
if (coordType == CoordinateType.Left)
{
triangles.AddRange(triangle);
}
else // Coordinate.Right
{
int tmp = triangle[1];
triangle[1] = triangle[2];
triangle[2] = tmp;
triangles.AddRange(triangle);
}
bytesRead += 1 + indexCount * bytesPerTriangleIndex;
}
else
{
Debug.LogWarning("Warning: Found a face is not a triangle face, skipping...");
}
facesRead++;
}
}
// TODO: test
public void ParseElementBinaryLittleEndian(byte[] bytes, int bytesOffset, out int bytesUsed, out List <List <int> > lines)
{
if (NElement == 0)
{
bytesUsed = 0;
lines = null;
return;
}
lines = new List <List <int> >();
int linesRead = 0;
int bytesRead = 0;
int bytesPerLineIndex = 4;
int[] triangle = new int[3];
while (linesRead < NElement)
{
var lineIndex = bytesOffset + bytesRead;
var count = bytes[lineIndex];
bytesRead += 1 + count * bytesPerLineIndex;
if (count < 2)
{
Debug.LogWarning("Warning: Found a line points < 2, skipping...");
continue;
}
var line = new List <int>();
for (int i = 0; i < count; ++i)
{
line.Add(System.BitConverter.ToInt32(PlyElement.GetBytesSubarray(bytes, lineIndex + 1 + i * bytesPerLineIndex, bytesPerLineIndex), 0));
}
lines.Add(line);
linesRead++;
}
bytesUsed = bytesRead;
}
public void ParseElementBinaryLittleEndian(byte[] bytes, out int bytesUsed,
out IList <Vector3> vertices, out IList <Vector3> normals, out IList <Color32> colors)
{
if (NElement == 0)
{
bytesUsed = 0;
vertices = null;
normals = null;
colors = null;
return;
}
vertices = HasPosition ? new List <Vector3>() : null;
normals = HasNormal ? new List <Vector3>() : null;
colors = HasColor ? new List <Color32>() : null;
int bytesPerVertex = 0;
foreach (var keyvalue in DictProperties)
{
bytesPerVertex += keyvalue.Value.ValueDataBytes;
}
bytesUsed = bytesPerVertex * NElement;
int[] coordinateTranslate;
int[] signs;
_header.GlobalMeshInfoElement.GetCoordinateTransalte(out coordinateTranslate, out signs);
float ratioToMeter = _header.GlobalMeshInfoElement.GetUnitToMeterRatio();
float[] value = new float[3];
for (int i = 0; i < NElement; ++i)
{
int byteIndex = i * bytesPerVertex;
if (HasPosition)
{
PlyMultiProperty xmultiProperty = (DictProperties["x"] as PlyMultiProperty);
PlyMultiProperty ymultiProperty = (DictProperties["y"] as PlyMultiProperty);
PlyMultiProperty zmultiProperty = (DictProperties["z"] as PlyMultiProperty);
value[0] = System.BitConverter.ToSingle(PlyElement.GetBytesSubarray(bytes, byteIndex + xmultiProperty.BytesOffset, xmultiProperty.ValueDataBytes), 0);
value[1] = System.BitConverter.ToSingle(PlyElement.GetBytesSubarray(bytes, byteIndex + ymultiProperty.BytesOffset, ymultiProperty.ValueDataBytes), 0);
value[2] = System.BitConverter.ToSingle(PlyElement.GetBytesSubarray(bytes, byteIndex + zmultiProperty.BytesOffset, zmultiProperty.ValueDataBytes), 0);
vertices.Add(new Vector3(value[coordinateTranslate[0]] * signs[0], value[coordinateTranslate[1]] * signs[1], value[coordinateTranslate[2]] * signs[2]) * ratioToMeter);
}
if (HasNormal)
{
PlyMultiProperty xmultiProperty = (DictProperties["nx"] as PlyMultiProperty);
PlyMultiProperty ymultiProperty = (DictProperties["ny"] as PlyMultiProperty);
PlyMultiProperty zmultiProperty = (DictProperties["nz"] as PlyMultiProperty);
value[0] = System.BitConverter.ToSingle(PlyElement.GetBytesSubarray(bytes, byteIndex + xmultiProperty.BytesOffset, xmultiProperty.ValueDataBytes), 0);
value[1] = System.BitConverter.ToSingle(PlyElement.GetBytesSubarray(bytes, byteIndex + ymultiProperty.BytesOffset, ymultiProperty.ValueDataBytes), 0);
value[2] = System.BitConverter.ToSingle(PlyElement.GetBytesSubarray(bytes, byteIndex + zmultiProperty.BytesOffset, zmultiProperty.ValueDataBytes), 0);
Vector3 normal = new Vector3(value[coordinateTranslate[0]] * signs[0], value[coordinateTranslate[1]] * signs[1], value[coordinateTranslate[2]] * signs[2]) * ratioToMeter;
normal.Normalize();
normals.Add(normal);
}
if (HasColor)
{
PlyMultiProperty redmultiProperty = (DictProperties["red"] as PlyMultiProperty);
PlyMultiProperty greenmultiProperty = (DictProperties["green"] as PlyMultiProperty);
PlyMultiProperty bluemultiProperty = (DictProperties["blue"] as PlyMultiProperty);
PlyMultiProperty alphamultiProperty = (DictProperties["alpha"] as PlyMultiProperty);
byte r = bytes[byteIndex + redmultiProperty.BytesOffset];
byte g = bytes[byteIndex + greenmultiProperty.BytesOffset];
byte b = bytes[byteIndex + bluemultiProperty.BytesOffset];
byte a = bytes[byteIndex + alphamultiProperty.BytesOffset];
colors.Add(new Color32(r, g, b, a));
}
}
}
