204 lines
8.3 KiB
C#
204 lines
8.3 KiB
C#
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using System;
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using System.Collections.Generic;
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using System.Globalization;
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using System.IO;
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using System.Linq;
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using System.Text;
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using System.Text.RegularExpressions;
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using QuantumConcepts.Formats.StereoLithography;
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namespace QuantumConcepts.Formats.StereoLithography
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{
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/// <summary>A simple XYZ representation of a vertex.</summary>
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public class Vertex : IEquatable<Vertex>
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{
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/// <summary>The X coordinate of this <see cref="Vertex"/>.</summary>
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public float X { get; set; }
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/// <summary>The Y coordinate of this <see cref="Vertex"/>.</summary>
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public float Y { get; set; }
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/// <summary>The Z coordinate of this <see cref="Vertex"/>.</summary>
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public float Z { get; set; }
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/// <summary>Creates a new, empty <see cref="Vertex"/>.</summary>
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public Vertex() { }
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/// <summary>Creates a new <see cref="Vertex"/> using the provided coordinates.</summary>
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/// <param name="x"><see cref="X"/></param>
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/// <param name="y"><see cref="Y"/></param>
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/// <param name="z"><see cref="Z"/></param>
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public Vertex(float x, float y, float z)
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: this()
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{
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this.X = x;
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this.Y = y;
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this.Z = z;
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}
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/// <summary>Shifts the <paramref name="Vertex"/> by the X, Y and Z values in the <paramref name="shift"/> parameter.</summary>
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/// <param name="shift">The amount to shift the vertex.</param>
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public void Shift(Vertex shift)
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{
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this.X += shift.X;
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this.Y += shift.Y;
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this.Z += shift.Z;
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}
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/// <summary>Writes the <see cref="Vertex"/> as text to the <paramref name="writer"/>.</summary>
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/// <param name="writer">The writer to which the <see cref="Vertex"/> will be written at the current position.</param>
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public void Write(StreamWriter writer)
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{
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writer.WriteLine("\t\t\t{0}".Interpolate(this.ToString()));
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}
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/// <summary>Writes the <see cref="Vertex"/> as binary to the <paramref name="writer"/>.</summary>
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/// <param name="writer">The writer to which the <see cref="Vertex"/> will be written at the current position.</param>
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public void Write(BinaryWriter writer)
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{
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writer.Write(this.X);
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writer.Write(this.Y);
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writer.Write(this.Z);
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}
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/// <summary>Returns the string representation of this <see cref="Vertex"/>.</summary>
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public override string ToString()
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{
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//return "vertex {0} {1} {2}".FormatString(this.X, this.Y, this.Z);
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return String.Format(CultureInfo.InvariantCulture, "vertex {0} {1} {2}", this.X, this.Y, this.Z);
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}
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/// <summary>Determines whether or not this instance is the same as the <paramref name="other"/> instance.</summary>
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/// <param name="other">The <see cref="Vertex"/> to which to compare.</param>
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public bool Equals(Vertex other)
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{
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return (this.X.Equals(other.X)
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&& this.Y.Equals(other.Y)
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&& this.Z.Equals(other.Z));
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}
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/// <summary>Reads a single <see cref="Vertex"/> from the <paramref name="reader"/>.</summary>
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/// <param name="reader">The reader which contains a <see cref="Vertex"/> to be read at the current position</param>
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public static Vertex ReadRegex(StreamReader reader)
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{
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// vertex 5.417830e-001 2.674600e-001 -4.180212e+000
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const string regex = @"\s*(facet normal|vertex)\s+(?<X>[^\s]+)\s+(?<Y>[^\s]+)\s+(?<Z>[^\s]+)";
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const NumberStyles numberStyle = (NumberStyles.AllowExponent | NumberStyles.AllowDecimalPoint | NumberStyles.AllowLeadingSign);
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string data = null;
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float x, y, z;
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Match match = null;
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if (reader == null)
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return null;
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//Read the next line of data.
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data = reader.ReadLine();
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if (data == null)
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return null;
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//Ensure that the data is formatted correctly.
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match = Regex.Match(data, regex, RegexOptions.IgnoreCase);
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if (!match.Success)
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return null;
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//Parse the three coordinates.
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if (!float.TryParse(match.Groups["X"].Value, numberStyle, CultureInfo.InvariantCulture, out x))
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throw new FormatException("Could not parse X coordinate \"{0}\" as a decimal.".Interpolate(match.Groups["X"]));
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if (!float.TryParse(match.Groups["Y"].Value, numberStyle, CultureInfo.InvariantCulture, out y))
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throw new FormatException("Could not parse Y coordinate \"{0}\" as a decimal.".Interpolate(match.Groups["Y"]));
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if (!float.TryParse(match.Groups["Z"].Value, numberStyle, CultureInfo.InvariantCulture, out z))
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throw new FormatException("Could not parse Z coordinate \"{0}\" as a decimal.".Interpolate(match.Groups["Z"]));
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return new Vertex()
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{
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X = x,
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Y = y,
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Z = z
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};
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}
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/// <summary>Reads a single <see cref="Vertex"/> from the <paramref name="reader"/>.</summary>
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/// <param name="reader">The reader which contains a <see cref="Vertex"/> to be read at the current position</param>
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public static Vertex Read(StreamReader reader)
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{
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// facet normal -1.732201e-002 1.019131e-001 -9.946425e-001
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// vertex 5.417830e-001 2.674600e-001 -4.180212e+000
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const NumberStyles numberStyle = (NumberStyles.AllowExponent | NumberStyles.AllowDecimalPoint | NumberStyles.AllowLeadingSign);
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string data = null;
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float x, y, z;
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Match match = null;
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if (reader == null)
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return null;
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//Read the next line of data.
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data = reader.ReadLine();
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if (data == null)
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return null;
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string[] tmp = data.Split(new string[] { " " }, StringSplitOptions.RemoveEmptyEntries);
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if (tmp.Length > 0 && tmp[0].Length == 8 && tmp[0].ToLower() == "endsolid")
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return null;
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int start;
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if (tmp.Length == 4) start = 1;
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else if (tmp.Length == 5) start = 2;
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else return null;
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//Parse the three coordinates.
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if (!float.TryParse(tmp[start + 0], numberStyle, CultureInfo.InvariantCulture, out x))
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throw new FormatException("Could not parse X coordinate \"{0}\" as a decimal.".Interpolate(match.Groups["X"]));
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if (!float.TryParse(tmp[start + 1], numberStyle, CultureInfo.InvariantCulture, out y))
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throw new FormatException("Could not parse Y coordinate \"{0}\" as a decimal.".Interpolate(match.Groups["Y"]));
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if (!float.TryParse(tmp[start + 2], numberStyle, CultureInfo.InvariantCulture, out z))
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throw new FormatException("Could not parse Z coordinate \"{0}\" as a decimal.".Interpolate(match.Groups["Z"]));
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return new Vertex()
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{
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X = x,
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Y = y,
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Z = z
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};
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}
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/// <summary>Reads a single <see cref="Vertex"/> from the <paramref name="reader"/>.</summary>
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/// <param name="reader">The reader which contains a <see cref="Vertex"/> to be read at the current position</param>
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public static Vertex Read(BinaryReader reader)
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{
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const int floatSize = sizeof(float);
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const int vertexSize = (floatSize * 3);
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if (reader == null)
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return null;
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//Read 3 floats.
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byte[] data = new byte[vertexSize];
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int bytesRead = reader.Read(data, 0, data.Length);
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//If no bytes are read then we're at the end of the stream.
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if (bytesRead == 0)
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return null;
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else if (bytesRead != data.Length)
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throw new FormatException("Could not convert the binary data to a vertex. Expected {0} bytes but found {1}.".Interpolate(vertexSize, bytesRead));
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//Convert the read bytes to their numeric representation.
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return new Vertex()
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{
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X = BitConverter.ToSingle(data, 0),
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Y = BitConverter.ToSingle(data, floatSize),
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Z = BitConverter.ToSingle(data, (floatSize * 2))
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};
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}
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}
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}
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