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++;
}
}
public PlyProperty(string valueFormat)
{
ValueNumFormat = PlyProperty.GetDataFormat(valueFormat);
ValueDataBytes = PlyProperty.GetDataBytes(ValueNumFormat);
}
public PlyListProperty(string countFormat, string valueFormat, string name) : base(valueFormat)
{
CountNumFormat = PlyProperty.GetDataFormat(countFormat);
IsValid = CountNumFormat != ENumFormat.nf_invalid && ValueNumFormat != ENumFormat.nf_invalid;
_name = name;
}
