/// <summary>
/// Removes up to a number of newlines (and whitespace between them) that are found after the specified
/// <paramref name="tagInstance"/>.
/// </summary>
/// <remarks>
/// If <paramref name="numberOfNewlines"/> is higher than the actual number of newlines after the
/// <paramref name="tagInstance"/>, only the actual number of newlines will be removed.
/// </remarks>
/// <param name="tagInstance">The tag instance to remove whitespace from after</param>
/// <param name="numberOfNewlines">The number of newlines to remove</param>
public void RemoveWhitespaceAfterTag(ITagInstance tagInstance, int numberOfNewlines)
{
if (numberOfNewlines <= 0)
{
throw new ArgumentOutOfRangeException("numberOfNewlines", "numberOfNewlines must be greater than 0.");
}
if (tagInstance.CharRange.StartAt >= _RenderString.Length)
{
return;
}
int startAt = tagInstance.CharRange.StartAt + tagInstance.CharRange.Length;
Match match = _AfterTagWhitespaceRegex.Match(GetRenderString(), startAt);
if (match.Success == false)
{
return;
}
CaptureCollection captures = match.Groups["nl"].Captures;
if (captures.Count <= numberOfNewlines)
{
RenderNonTagRange(match.Index, match.Length, String.Empty, false);
}
else
{
int length = captures.Cast <Capture>().Take(numberOfNewlines).Sum(c => c.Length);
RenderNonTagRange(startAt, length, String.Empty, false);
}
}
/// <summary>
/// This should be instantiated only in the Siderite.StreamRegex namespace
/// </summary>
/// <param name="captures">Collection of regex captures</param>
/// <param name="streamPosition"></param>
internal StreamCaptureCollection(CaptureCollection captures, int streamPosition)
{
_list = new List <StreamCapture>(captures
.Cast <Capture>()
.Select(capture => new StreamCapture(capture, streamPosition)));
}
public static void Load(string filepath, TriangleMesh triMesh, float scale)
{
List <Vector3> vertices = new List <Vector3>();
string[] strings = System.IO.File.ReadAllLines(filepath);
// Lines starting with v are a vertex:
// "v 10.2426 4.5e-013 -31.7638"
Regex vertexRegex = new Regex(@"^v\s+(?<x>\S+)\s+(?<y>\S+)\s+(?<z>\S+)", RegexOptions.IgnoreCase);
// Lines starting with f are a face. The indices are <vertex>/<texture>/<normal>, where texture and normal are optional.
// "f 1/1/1 2/2/1 3/3/1 4/4/1 5/5/1"
Regex faceRegex = new Regex(@"^f(?<face_data>\s+(?<vertex>\d+)/?(?<texture_coordinate>\d+)?/?(?<vertex_normal>\d+)?)+", RegexOptions.IgnoreCase);
foreach (string s in strings)
{
if (vertexRegex.IsMatch(s))
{
Match m = vertexRegex.Match(s);
float x = float.Parse(m.Groups["x"].Value);
float y = float.Parse(m.Groups["y"].Value);
float z = float.Parse(m.Groups["z"].Value);
// Rotate 90 degrees about the X axis - for some reason .obj files saved from sketchup have this issue...
Vector3 v = new Vector3(x, -z, y);
vertices.Add(v * scale);
}
else if (faceRegex.IsMatch(s))
{
Match m = faceRegex.Match(s);
//Console.WriteLine(m.Groups["face_data"].Captures.Count);
//Console.WriteLine(m.Groups["vertex"].Captures.Count);
//Console.WriteLine(m.Groups["texture_coordinate"].Captures.Count);
//Console.WriteLine(m.Groups["vertex_normal"].Captures.Count);
//Face face = new Face();
Polygon polygon = new Polygon();
CaptureCollection vert_captures = m.Groups["vertex"].Captures;
CaptureCollection texcoord_captures = m.Groups["texture_coordinate"].Captures;
CaptureCollection norm_captures = m.Groups["vertex_normal"].Captures;
var vertexIndices = vert_captures.Cast <Capture>().Select(capture => int.Parse(capture.Value) - 1);
foreach (var vertexIndex in vertexIndices)
{
if (vertexIndex < 0 || vertexIndex > vertices.Count)
{
Console.WriteLine("Bad vertex index {0}, only {1} vertices loaded", vertexIndex, vertices.Count);
}
else
{
polygon.Add(vertices[vertexIndex]);
}
}
//for (int i = 0; i < vert_captures.Count; i++)
//{
// int vert_index = int.Parse(vert_captures[i].Value) - 1;
//
//}
if (texcoord_captures.Count == vert_captures.Count)
{
// TODO: Add texture coordinates to the face
}
if (norm_captures.Count == vert_captures.Count)
{
// TODO: Add vertex normals to the face
}
if (polygon.Vertices.Count() < 3)
{
Console.WriteLine("Bad face defined, less than 3 vertices");
}
else
{
foreach (var triangle in polygon.ToTriangles())
{
triMesh.AddTriangle(triangle);
}
}
}
}
}
