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Classes_ImageSource.cs
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Classes_ImageSource.cs
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//'Pachyderm-Acoustic: Geometrical Acoustics for Rhinoceros (GPL) by Arthur van der Harten
//'
//'This file is part of Pachyderm-Acoustic.
//'
//'Copyright (c) 2008-2015, Arthur van der Harten
//'Pachyderm-Acoustic is free software; you can redistribute it and/or modify
//'it under the terms of the GNU General Public License as published
//'by the Free Software Foundation; either version 3 of the License, or
//'(at your option) any later version.
//'Pachyderm-Acoustic is distributed in the hope that it will be useful,
//'but WITHOUT ANY WARRANTY; without even the implied warranty of
//'MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
//'GNU General Public License for more details.
//'
//'You should have received a copy of the GNU General Public
//'License along with Pachyderm-Acoustic; if not, write to the Free Software
//'Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
using Rhino.Geometry;
using System;
using System.Collections.Generic;
using Hare.Geometry;
using Pachyderm_Acoustic.Environment;
using System.Linq;
namespace Pachyderm_Acoustic
{
public class ImageSourceData:Simulation_Type
{
private List<Deterministic_Reflection>[]ValidPaths;
private List<Deterministic_Reflection>[,] ThreadPaths;
private double Speed_of_Sound;
private int MaxOrder;
private Source Src;
private Hare.Geometry.Point[] Rec;
private Polygon_Scene Room;
private int[] CurrentSrf;
private int[] CurrentEdge;
private DateTime ST;
private Random[] Rnd;
private double[] Direct_Time;
System.Threading.Thread[] T_List;
int processorCT;
int elementCt;
private TimeSpan TS;
private int SampleCT;
private int SampleRate;
public int SrcNo;
public int[] Oct_choice;
public bool Diffraction = false;
public bool IncludeEdges = false;
private ImageSourceData()
{
}
public ImageSourceData(Source Source, Receiver_Bank Receiver, Direct_Sound Direct, Polygon_Scene Rm, int MaxOrder_in, int SourceID_in)
:this(Source, Receiver, Direct, Rm, new int[2] { 0, 7 }, MaxOrder_in, false, SourceID_in)
{ }
public ImageSourceData(Source Source, Receiver_Bank Receiver, Direct_Sound Direct, Polygon_Scene Rm, int MaxOrder_in, bool ED, int SourceID_in)
: this(Source, Receiver, Direct, Rm, new int[2] { 0, 7 }, MaxOrder_in, ED, SourceID_in)
{ }
/// <summary>
/// Constructor prepares image source calculation to run.
/// </summary>
/// <param name="Source"></param>
/// <param name="Receiver"></param>
/// <param name="Direct"></param>
/// <param name="Rm"></param>
/// <param name="MaxOrder_in">The maximum order to be calculated for.</param>
public ImageSourceData(Source Source, Receiver_Bank Receiver, Direct_Sound Direct, Polygon_Scene Rm, int[] Octaves, int MaxOrder_in, bool Edge_Diffraction, int SourceID_in)
{
IncludeEdges = Edge_Diffraction;
Diffraction = Edge_Diffraction;
Oct_choice = new int[Octaves[1] - Octaves[0] + 1];
for (int i = 0; i < Octaves.Length; i++) Oct_choice[i] = i + Octaves[0];
SrcNo = SourceID_in;
ValidPaths = new List<Deterministic_Reflection>[Receiver.Count];
Speed_of_Sound = Rm.Sound_speed(0);
MaxOrder = MaxOrder_in;
Src = Source;
Rec = new Hare.Geometry.Point[Receiver.Count];
SampleCT = Receiver.SampleCT;
SampleRate = Receiver.SampleRate;
for(int i = 0; i < Receiver.Count; i++)
{
Rec[i] = Receiver.H_Origin(i);
}
Room = Rm;
Direct_Time = new double[Receiver.Count];
for (int q = 0; q < Receiver.Count; q++)
{
Direct_Time[q] = Direct.Min_Time(q);
}
}
/// <summary>
/// Called by Pach_RunSim_Command. Indicates whether or not the simulation has completed.
/// </summary>
/// <returns>Returns running if any threads in this simulation are still running. Returns stopped if all have stopped.</returns>
public override System.Threading.ThreadState ThreadState()
{
foreach (System.Threading.Thread T in T_List)
{
if (T.ThreadState == System.Threading.ThreadState.Running) return System.Threading.ThreadState.Running;
}
return System.Threading.ThreadState.Stopped;
}
/// <summary>
/// Inherited member. Divides the simulation into threads, and begins.
/// </summary>
public override void Begin()
{
processorCT = UI.PachydermAc_PlugIn.Instance.ProcessorSpec();
ThreadPaths = new List<Deterministic_Reflection>[Rec.Length, processorCT];
int SrfCT = Room.PlaneCount;
CurrentSrf = new int[processorCT];
CurrentEdge = new int[processorCT];
Rnd = new Random[processorCT];
T_List = new System.Threading.Thread[processorCT];
elementCt = Room.PlaneCount + ((this.Diffraction) ? Room.EdgeCount : 0);
for (int P_I = 0; P_I < processorCT; P_I++)
{
for (int i = 0; i < Rec.Length; i++)
{
ThreadPaths[i,P_I] = new List<Deterministic_Reflection>();
ValidPaths[i] = new List<Deterministic_Reflection>();
}
int start = (int)Math.Floor((double)P_I * SrfCT / processorCT);
int end;
if (P_I == processorCT - 1) end = SrfCT;
else end = (P_I + 1) * SrfCT / processorCT;
Calc_Params T = new Calc_Params(start, end, P_I, Room.R_Seed.Next());
System.Threading.ParameterizedThreadStart TS = new System.Threading.ParameterizedThreadStart(delegate { Calculate(T); });
T_List[P_I] = new System.Threading.Thread(TS);
T_List[P_I].Start();
}
}
/// <summary>
/// Called by each thread from the begin method.
/// </summary>
/// <param name="i">the object is type "Calc_Params" which holds all the necessary information to run a portion of the simulation.</param>
public void Calculate(object i)
{
Calc_Params Params = (Calc_Params) i;
Rnd[Params.ThreadID] = new Random(Params.RandomSeed);
ST = DateTime.Now;
int[] Sequence = new int[1];
for (CurrentSrf[Params.ThreadID] = 0; CurrentSrf[Params.ThreadID] < Params.EndIndex - Params.StartIndex; CurrentSrf[Params.ThreadID]++)
{
List<Hare.Geometry.Point[]> Images = new List<Hare.Geometry.Point[]> {new Hare.Geometry.Point[1]};
Sequence[0] = CurrentSrf[Params.ThreadID] + Params.StartIndex;
Images[0][0] = Room.Image(Src.H_Origin(), 0, Room.PlaneMembers[Sequence[0]][0]);
//Process all valid first order reflections...
ProcessImages(Images.ToArray(), Sequence, Params.ThreadID);
//for (int j = 0; j < Rec.Length; j++) ProcessPath(Sequence, Params.ThreadID, j);
//Process higher order reflections (if needed)
if (Diffraction)
{
LateOrdersED(1, Sequence, Params.ThreadID, Images);
}
else
{
LateOrders(1, Sequence, Params.ThreadID, Images[0]);
}
}
if (!Diffraction) return;
//User has chosen to process edge reflections as well.
int EdgeStart = (Room.EdgeCount * Params.ThreadID / (processorCT));
int EdgeEnd = (Room.EdgeCount * (Params.ThreadID + 1) / (processorCT));
//int FS = 88200;
for (CurrentEdge[Params.ThreadID] = EdgeStart; CurrentEdge[Params.ThreadID] < EdgeEnd; CurrentEdge[Params.ThreadID]++)
{
//Process all valid first order edge reflections...
//Sequence[0] = CurrentEdge[Params.ThreadID] + EdgeStart;
//List<double> P, T;
//List<Vector> D;
//List<Hare.Geometry.Point> Pt;
//List<Hare.Geometry.Point> Src = new List<Hare.Geometry.Point>();
Sequence[0] = CurrentEdge[Params.ThreadID] + Room.PlaneCount;
List<Hare.Geometry.Point[]> Images = new List<Hare.Geometry.Point[]>();
for (int j = 0; j < Room.Edge_Nodes[CurrentEdge[Params.ThreadID]].EdgeSources.Count; j++)
{
Images.Add(new Hare.Geometry.Point[1]{Room.Edge_Nodes[CurrentEdge[Params.ThreadID]].EdgeSources[j].Z_mid});
}
//Process all valid first order reflections...
ProcessImages(Images.ToArray(), Sequence, Params.ThreadID);
//Process higher order reflections (if needed)
LateOrdersED(1, Sequence, Params.ThreadID, Images);
}
}
/// <summary>
/// Used by specular raytracer.
/// </summary>
/// <param name="Sequences">List of surface index sequences to try.</param>
public void Lookup_Sequences(List<int[]>[] Sequences)
{
processorCT = UI.PachydermAc_PlugIn.Instance.ProcessorSpec();
ThreadPaths = new List<Deterministic_Reflection>[Rec.Length,processorCT];
int SrfCT = Room.PlaneCount;
CurrentSrf = new int[processorCT];
Random R = new Random();
T_List = new System.Threading.Thread[processorCT];
for (int p = 0; p < Rec.Length; p++)
{
for (int P_I = 0; P_I < processorCT; P_I++)
{
ThreadPaths[p, P_I] = new List<Deterministic_Reflection>();
Calc_Params T = new Calc_Params(P_I * Sequences[p].Count / processorCT, (P_I + 1) * Sequences[p].Count / processorCT, P_I, R.Next());
System.Threading.ParameterizedThreadStart TS = new System.Threading.ParameterizedThreadStart(delegate
{
for (int i = T.StartIndex; i < T.EndIndex; i++)
{
ProcessPath(Sequences[p][i], T.ThreadID, p);
}
});
T_List[P_I] = new System.Threading.Thread(TS);
T_List[P_I].Start();
}
do
{
System.Threading.Thread.Sleep(1000);
if (ThreadState() != System.Threading.ThreadState.Running) break;
} while (true);
for (int t = 0; t < processorCT; t++)
{
ValidPaths[p].AddRange(ThreadPaths[p, t]);
}
}
}
/// <summary>
/// A string to identify the type of simulation being run.
/// </summary>
/// <returns></returns>
public override string Sim_Type()
{
return "Image Source";
}
/// <summary>
/// Called by Pach_RunSim_Command. Get a string describing the status of the simulation for display.
/// </summary>
/// <returns></returns>
public override string ProgressMsg()
{
TS = DateTime.Now - ST;
int Srf_CT = 0;
for (int i = 0; i < processorCT; i++) Srf_CT += CurrentSrf[i];
if (Diffraction)
{
int Edge_CT = 0;
for (int i = 0; i < processorCT; i++) Edge_CT += CurrentEdge[i];
TS = new TimeSpan((long)(TS.Ticks * (((double)(Room.PlaneCount - Srf_CT) + (Room.EdgeCount - Edge_CT)) / (Srf_CT + Edge_CT + 2))));
return string.Format("Calculating Image/Edge Set {0} of {1}. ({2} hours,{3} minutes,{4} seconds Remaining.) Press 'Esc' to Cancel...", Srf_CT + Edge_CT, Room.PlaneCount + Room.EdgeCount, TS.Hours, TS.Minutes, TS.Seconds);
}
else
{
TS = new TimeSpan((long)(TS.Ticks * (((double)(Room.PlaneCount - Srf_CT)) / (Srf_CT + 1))));
return string.Format("Calculating Image Set {0} of {1}. ({2} hours,{3} minutes,{4} seconds Remaining.) Press 'Esc' to Cancel...", Srf_CT, Room.PlaneCount, TS.Hours, TS.Minutes, TS.Seconds);
}
}
/// <summary>
/// Aborts all threads, effectively ending the simulation.
/// </summary>
public override void Abort_Calculation()
{
foreach(System.Threading.Thread T in T_List) T.Abort();
}
/// <summary>
/// Consolidates output from all threads into a single set of output.
/// </summary>
public override void Combine_ThreadLocal_Results()
{
for (int i = 0; i < Rec.Length; i++)
{
for (int p = 0; p < processorCT; p++)
{
ValidPaths[i].AddRange(ThreadPaths[i, p]);
}
}
}
/// <summary>
/// Recursive function which carries out image source method for orders greater than 1.
/// </summary>
/// <param name="LastOrder">The order of the calling iteration.</param>
/// <param name="Sequence">The input sequence, to which the next surface will be appended.</param>
/// <param name="ThreadId">The id of the thread using the function.</param>
/// <param name="Images">the list of source images, to which the next image will be appended.</param>
private void LateOrders(int LastOrder, int[] Sequence, int ThreadId, Hare.Geometry.Point[] Images)
{
int CurrentOrder = LastOrder + 1;
Array.Resize(ref Sequence, Sequence.Length + 1);
Array.Resize(ref Images, Images.Length + 1);
bool GoNext = CurrentOrder < MaxOrder;
for (int q = 0; q < elementCt; q++)
{
if (q != Sequence[Sequence.Length - 2] && CurrentOrder <= MaxOrder)
{
Sequence[Sequence.Length - 1] = q;
Images[Images.Length - 1] = Room.Image(Images[Images.Length - 2], 0, Room.PlaneMembers[q][0]);
ProcessImages(new Hare.Geometry.Point[1][]{Images}, Sequence, ThreadId);
if (GoNext)
{
LateOrders(CurrentOrder, Sequence, ThreadId, Images);
}
}
}
}
/// <summary>
/// Recursive function which carries out image source/edge source method for orders greater than 1.
/// </summary>
/// <param name="LastOrder">The order of the calling iteration.</param>
/// <param name="Sequence">The input sequence, to which the next surface will be appended.</param>
/// <param name="ThreadId">The id of the thread using the function.</param>
/// <param name="Images">the list of source images, to which the next image will be appended.</param>
private void LateOrdersED(int LastOrder, int[] Sequence, int ThreadId, List<Hare.Geometry.Point[]> Images0)
{
int CurrentOrder = LastOrder + 1;
Array.Resize(ref Sequence, CurrentOrder);//Sequence.Length + 1);
bool GoNext = CurrentOrder < MaxOrder;
for (int q = 0; q < elementCt; q++)
{
List<Hare.Geometry.Point[]> Images = new List<Hare.Geometry.Point[]>();
if (q != Sequence[Sequence.Length - 2] && CurrentOrder <= MaxOrder)
{
//int Current = Images0.Count;
Sequence[LastOrder] = q;
for(int r = 0; r < Images0.Count; r++)
{
Hare.Geometry.Point[] im = Images0[r].Clone() as Hare.Geometry.Point[];
if (Sequence[q] > Room.PlaneCount - 1)
{
int edge_id = Sequence[q] - Room.PlaneCount;
//Its an edge...
//Hare.Geometry.Point[] im = Images0[r].Clone() as Hare.Geometry.Point[];
for(int i = 0; i < Room.Edge_Nodes[edge_id].EdgeSources.Count; i++)
{
im[LastOrder] = Room.Edge_Nodes[edge_id].EdgeSources[i].Z_mid;
Images.Add(im.Clone() as Hare.Geometry.Point[]);
}
//Room.Edge_Nodes[edge_id].EdgeSources
}
else
{
//Hare.Geometry.Point[] im = Images0[r].Clone() as Hare.Geometry.Point[];
im[LastOrder] = Room.Image(Images[r][Images[r].Length - 2], 0, Room.PlaneMembers[q][0]);
Images.Add(im);
//Images[r][Images[r].Length - 1] = Room.Image(Images[r][Images[r].Length - 2], 0, Room.PlaneMembers[q][0]);
}
ProcessImages(Images.ToArray(), Sequence, ThreadId);
if (GoNext)
{
LateOrdersED(CurrentOrder, Sequence, ThreadId, Images);
}
}
}
}
}
/// <summary>
/// This function calculates the actual path of the specular reflection.
/// </summary>
/// <param name="Images">The list of images.</param>
/// <param name="Sequence">The list of surface indices for reflection.</param>
/// <param name="Threadid">The id of the calling thread.</param>
private void ProcessImages(Hare.Geometry.Point[][] Images, int[] Sequence, int Threadid)
{
for (int rec_id = 0; rec_id < Rec.Length; rec_id++)
{
double c_sound = Room.Sound_speed(Rec[rec_id]);
double[][] Trans_Mod = new double[Images.Length][];
int[] Seq_Polys = new int[Sequence.Length];
List<Hare.Geometry.Point[]> PathVertices = new List<Hare.Geometry.Point[]>();
Hare.Geometry.Point S = Src.H_Origin();
Hare.Geometry.Point E = Rec[rec_id];
double df = SampleRate * .5 / 4096;
//Find all Path Legs from Receiver to Source
for (int r = 0; r < Images.Length; r++)
{
Trans_Mod[r] = new double[8];
for (int t_oct = 0; t_oct < 8; t_oct++) Trans_Mod[r][t_oct] = 1;
Hare.Geometry.Point[] path = new Hare.Geometry.Point[Sequence.Length + 2];
path[0] = S;
path[path.Length - 1] = E;
for (int q = Sequence.Length - 1; q >= 0; q--)
{
if (Sequence[q] > Room.PlaneCount - 1)
{
//It's an edge!
int EdgeID = Sequence[q] - Room.PlaneCount;
//for (int i = 1; i < Room.Edge_Nodes[EdgeID].EdgeSources.Count; i++)
if (!OcclusionIntersectED(path[q + 2], Images[r][q], Sequence[q], ref Trans_Mod[r], ref path[q + 1], Threadid))// ref Trans_Mod, , ref Seq_Polys[q],
{
path = null;
break;
}
}
else
{
if (!OcclusionIntersect(path[q + 2], Images[r][q], Sequence[q], ref Trans_Mod[r], ref path[q + 1], ref Seq_Polys[q], Threadid))
{
path = null;
break;
}
}
}
PathVertices.Add(path);
}
//Check that any path was unoccluded... if so, then record this entry. If not, move on...
if (PathVertices.Count(item => item != null) == 0) continue; //goto Next;
//Final Occlusion Check:
for (int r = 0; r < PathVertices.Count; r++)
{
if (PathVertices[r] == null) continue;
if (Sequence[0] < Room.PlaneCount)
{
if (FinalOcclusion(PathVertices[r][0], PathVertices[r][1], Sequence[0], ref Trans_Mod[r], Threadid))
PathVertices[r] = null;
}
else
{
int edge_id = Sequence[0] - Room.PlaneCount;
if (FinalOcclusion(PathVertices[r][0], PathVertices[r][1], 0.00001, Room.Edge_Nodes[edge_id].ParentBreps[0], Room.Edge_Nodes[edge_id].ParentBreps[1], ref Trans_Mod[r], Threadid))
PathVertices[r] = null;
}
}
//Check again for null(occluded) paths...
if (PathVertices.Count(item => item != null) == 0) continue; //goto Next;
///Process all paths for pulse entry...
if (PathVertices.Count == 0) continue;//goto Next;
if (PathVertices.Count == 1)
{
ThreadPaths[rec_id, Threadid].Add(new Specular_Path(PathVertices[0], Sequence, Seq_Polys, Room, Src, Speed_of_Sound, Trans_Mod[0], ref Direct_Time[rec_id], Threadid, Rnd[Threadid].Next()));
continue;
}
//Process Compound Path before storing it.
double[] H = new double[0];
Environment.Material[] M = new Environment.Material[Sequence.Length];
for (int i = 0; i < M.Length; i++) M[i] = (Sequence[i] < Room.PlaneCount) ? Room.Surface_Material(Sequence[i]) : null;
//Arrange all information to build filtered response...
List<List<double>> Times = new List<List<double>>();
List<List<double>> Pr = new List<List<double>>();
List<double> Time = new List<double>();
List<double> Bs = new List<double>();
List<double> X = new List<double>();
List<double> Y = new List<double>();
List<double> Z = new List<double>();
List<List<double>> Xe = new List<List<double>>();
List<List<double>> Ye = new List<List<double>>();
List<List<double>> Ze = new List<List<double>>();
List<double> X_ = new List<double>();
List<double> Y_ = new List<double>();
List<double> Z_ = new List<double>();
List<List<double>> Xs = new List<List<double>>();
List<List<double>> Ys = new List<List<double>>();
List<List<double>> Zs = new List<List<double>>();
double deltaS = 0;
double dt = 1.0f / SampleRate;
List<double[]> t_limits = new List<double[]>();
for (int i = 0; i < PathVertices.Count; i++)
{
if (PathVertices[i] == null)
{
if (Bs.Count > 0)
{
t_limits.Add(new double[2] { Time.Min(), Time.Max() });
Pr.Add(Bs);
Bs = new List<double>();
Times.Add(Time);
Time = new List<double>();
Xe.Add(X);
X = new List<double>();
Ye.Add(Y);
Y = new List<double>();
Ze.Add(Z);
Z = new List<double>();
Xs.Add(X_);
X_ = new List<double>();
Ys.Add(Y_);
Y_ = new List<double>();
Zs.Add(Z_);
Z_ = new List<double>();
}
continue;
}
double l = 0;
double[] dm = null, dl = null;
double length1 = 0, length2 = 0;
double Pres = 1;
int s, c, e;
for (s = 0, c = 1, e = 2; e < PathVertices[i].Length; s++, c++, e++)
{
if (Sequence[s] < Room.PlaneCount)
{
length1 += (PathVertices[i][1] - PathVertices[i][c]).Length();
length2 = length1;
dl = new double[2] { (PathVertices[i][c] - PathVertices[i][e]).Length(), (PathVertices[i][c] - PathVertices[i][e]).Length() };
}
else if (Sequence[s] >= Room.PlaneCount)
{
double m = 0;
double B = Room.Edge_Nodes[Sequence[s] - Room.PlaneCount].EdgeSources[i].Flex_Solve(PathVertices[i][s], PathVertices[i][e], ref m, ref l, ref dm, ref dl);
Pres *= B;
length1 += dm[0];
length2 += dm[1];
}
else { throw new NotImplementedException("...well isn't that novel..."); }
}
length1 += dl[0];
length2 += dl[1];
double duration_s = SampleRate * Math.Abs(length2 - length1) / c_sound;
Vector DIR;
DIR = PathVertices[i][c-1] - PathVertices[i][e-1];
DIR.Normalize();
Pres /= duration_s;
double Tn = 0.5 * (length1 + length2) / c_sound;
if (Time.Count > 2)
{
double dtnew = Time[Time.Count - 2] - Tn;
if (deltaS != 0 && (dtnew > 0) != (deltaS > 0))
{
//Break it...
t_limits.Add(new double[2] { Time.Min(), Time.Max() });
if (Bs.Last() < Pres) { t_limits[t_limits.Count - 1][0] += dt; }
else { t_limits[t_limits.Count - 1][1] -= dt; }
Pr.Add(Bs);
Bs = new List<double>();
Times.Add(Time);
Time = new List<double>();
Xe.Add(X);
X = new List<double>();
Ye.Add(Y);
Y = new List<double>();
Ze.Add(Z);
Z = new List<double>();
Xs.Add(X_);
X_ = new List<double>();
Ys.Add(Y_);
Y_ = new List<double>();
Zs.Add(Z_);
Z_ = new List<double>();
///Ensure Continuity...
//Time.Add(Times[Times.Count - 1].Last());
//Bs.Add(Pr[Pr.Count - 1].Last());
//X.Add(Xe[Xe.Count - 1].Last());
//Y.Add(Ye[Ye.Count - 1].Last());
//Z.Add(Ze[Ze.Count - 1].Last());
//X_.Add(Xs[Xs.Count - 1].Last());
//Y_.Add(Ys[Ys.Count - 1].Last());
//Z_.Add(Zs[Zs.Count - 1].Last());
//dtnew *= -1;
}
deltaS = dtnew;
}
Vector DIRs = PathVertices[i][1] - PathVertices[i][0];
DIRs.Normalize();
X_.Add(DIRs.x);
Y_.Add(DIRs.y);
Z_.Add(DIRs.z);
Bs.Add(Pres);
Time.Add(Tn);
X.Add(DIR.x);
Y.Add(DIR.y);
Z.Add(DIR.z);
}
if (Bs.Count > 0)
{
t_limits.Add(new double[2] { Time.Min(), Time.Max() });
Pr.Add(Bs);
Times.Add(Time);
Xe.Add(X);
Ye.Add(Y);
Ze.Add(Z);
Xs.Add(X_);
Ys.Add(Y_);
Zs.Add(Z_);
}
MathNet.Numerics.Interpolation.CubicSpline[] Pr_Spline = new MathNet.Numerics.Interpolation.CubicSpline[Pr.Count];
MathNet.Numerics.Interpolation.CubicSpline[] X_Spline = new MathNet.Numerics.Interpolation.CubicSpline[Xe.Count];
MathNet.Numerics.Interpolation.CubicSpline[] Y_Spline = new MathNet.Numerics.Interpolation.CubicSpline[Ye.Count];
MathNet.Numerics.Interpolation.CubicSpline[] Z_Spline = new MathNet.Numerics.Interpolation.CubicSpline[Ze.Count];
MathNet.Numerics.Interpolation.CubicSpline[] Xs_Spline = new MathNet.Numerics.Interpolation.CubicSpline[Xs.Count];
MathNet.Numerics.Interpolation.CubicSpline[] Ys_Spline = new MathNet.Numerics.Interpolation.CubicSpline[Ys.Count];
MathNet.Numerics.Interpolation.CubicSpline[] Zs_Spline = new MathNet.Numerics.Interpolation.CubicSpline[Zs.Count];
double min = double.PositiveInfinity;
for (int i = 0; i < Times.Count; i++)
{
Pr_Spline[i] = MathNet.Numerics.Interpolation.CubicSpline.InterpolateAkima(Times[i], Pr[i]);
X_Spline[i] = MathNet.Numerics.Interpolation.CubicSpline.InterpolateAkima(Times[i], Xe[i]);
Y_Spline[i] = MathNet.Numerics.Interpolation.CubicSpline.InterpolateAkima(Times[i], Ye[i]);
Z_Spline[i] = MathNet.Numerics.Interpolation.CubicSpline.InterpolateAkima(Times[i], Ze[i]);
Xs_Spline[i] = MathNet.Numerics.Interpolation.CubicSpline.InterpolateAkima(Times[i], Xs[i]);
Ys_Spline[i] = MathNet.Numerics.Interpolation.CubicSpline.InterpolateAkima(Times[i], Ys[i]);
Zs_Spline[i] = MathNet.Numerics.Interpolation.CubicSpline.InterpolateAkima(Times[i], Zs[i]);
min = Math.Min(min, t_limits[i][1]);
}
//TODO: Find a way to include absorption/transmission effects... which will not affect the entire multipath reflection...
Dictionary<int, double> H_d = new Dictionary<int, double>();
Dictionary<int, double>[] H_directional = new Dictionary<int, double>[6];
for (int i = 0; i < 6; i++) H_directional[i] = new Dictionary<int, double>();
for (int i = 0; i < t_limits.Count; i++)
{
for (double t = t_limits[i][0]; t < t_limits[i][1]; t += dt)
{
Vector dir = new Vector(Xs_Spline[i].Interpolate(t), Ys_Spline[i].Interpolate(t), Zs_Spline[i].Interpolate(t));
////Compose Impulse Response...
//double T_current = (lengths[p_id] + dl[0]) / Room.Sound_speed(new Hare.Geometry.Point(0, 0, 0));
//double T_duration = (length2 + dl[1]) / Room.Sound_speed(new Hare.Geometry.Point(0, 0, 0)) - T_current;
///Apply TransMod to TF...
///Each sample will have it's own unique air attenuation and occlusion conditions, which means that it needs to be treated individually for input signal (for air attenuation and absorption).
//double[] TF = Audio.Pach_SP.Magnitude_Filter(new double[8] { Math.Sqrt(Trans_Mod[p_id][0] * SW[0]), Math.Sqrt(Trans_Mod[p_id][1] * SW[1]), Math.Sqrt(Trans_Mod[p_id][2] * SW[2]), Math.Sqrt(Trans_Mod[p_id][3] * SW[3]), Math.Sqrt(Trans_Mod[p_id][4] * SW[4]), Math.Sqrt(Trans_Mod[p_id][5] * SW[5]), Math.Sqrt(Trans_Mod[p_id][6] * SW[6]), Math.Sqrt(Trans_Mod[p_id][7] * SW[7]) }, 44100, 4096, Threadid);
double[] SW = Src.DirPower(Threadid, this.Rnd[Threadid].Next(), dir);
foreach (Environment.Material m in M)
{
if (m is Environment.Basic_Material) for (int oct = 0; oct < 8; oct++)
{
SW[oct] *= 1 - m.Coefficient_A_Broad(oct);
//SW[oct] *= Trans_Mod[j][oct];
}
}
System.Numerics.Complex[] TF = Audio.Pach_SP.Filter.Spectrum(new double[8] { Math.Sqrt(SW[0]), Math.Sqrt(SW[1]), Math.Sqrt(SW[2]), Math.Sqrt(SW[3]), Math.Sqrt(SW[4]), Math.Sqrt(SW[5]), Math.Sqrt(SW[6]), Math.Sqrt(SW[7]) }, 44100, 4096, Threadid);
//double[] ms = Audio.Pach_SP.Magnitude_Spectrum(new double[8] { Math.Sqrt(SW[0]), Math.Sqrt(SW[1]), Math.Sqrt(SW[2]), Math.Sqrt(SW[3]), Math.Sqrt(SW[4]), Math.Sqrt(SW[5]), Math.Sqrt(SW[6]), Math.Sqrt(SW[7]) }, 44100, 4096, Threadid);
//double[] ms = Audio.Pach_SP.Magnitude_Spectrum(new double[8] { Math.Sqrt(SW[0]), Math.Sqrt(SW[1]), Math.Sqrt(SW[2]), Math.Sqrt(SW[3]), Math.Sqrt(SW[4]), Math.Sqrt(SW[5]), Math.Sqrt(SW[6]), Math.Sqrt(SW[7]) }, 88200, 8096, Threadid);
//System.Numerics.Complex[] TF = new System.Numerics.Complex[ms.Length];
// for (int j = 0; j < TF.Length; j++) TF[j] = ms[j];
//Array.Resize(ref TF, TF.Length / 2);
///Apply Air attenuation to TF...
double[] atten = new double[0];
double[] freq = new double[0];
Room.AttenuationFilter(4096, 44100, t * c_sound, ref freq, ref atten, Rec[rec_id]);//sig is the magnitude response of the air attenuation filter...
//Room.AttenuationFilter(4096, 88200, t * c_sound, ref freq, ref atten, Rec[rec_id]);//sig is the magnitude response of the air attenuation filter...
for (int j = 0; j < TF.Length; j++) TF[j] *= atten[j];
for (int j = 0; j < M.Length; j++)
{
if (!(M[j] is Environment.Basic_Material))
{
if (Sequence[j] < Room.PlaneCount)
{
System.Numerics.Complex[] spec = M[j].Reflection_Spectrum(44100, 4096 / 2, Room.Normal(Sequence[j]), PathVertices[i][j] - PathVertices[i][j - 1], Threadid);
for (int k = 0; k < TF.Length; k++) TF[k] *= spec[k];
}
}
}
//Audio.Pach_SP.Filter.Response(TF, SampleRate, Threadid);
double[] pulse = Audio.Pach_SP.IFFT_Real4096(Audio.Pach_SP.Mirror_Spectrum(TF), Threadid);
//double[] pulse = new double[prepulse.Length];
Audio.Pach_SP.Scale(ref pulse);
//for (int j = 0; j < prepulse.Length; j++)
//{
// pulse[j] = prepulse[(j + prepulse.Length/2) % prepulse.Length];
//}
////////////////////////////////////////////////////////
//Pachyderm_Acoustic.Audio.Pach_SP.resample(ref pulse);
////////////////////////////////////////////////////////
//Audio.Pach_SP.Raised_Cosine_Window(ref pulse);
//Manual convolution of each distinct contribution of edge...
int index = (int)Math.Floor(t * SampleRate);
double omni_pr = Pr_Spline[i].Interpolate(t);
dir = new Vector(X_Spline[i].Interpolate(t), Y_Spline[i].Interpolate(t), Z_Spline[i].Interpolate(t));
double[] dir_c = new double[6];
if (dir.x > 0) dir_c[0] = dir.x; else dir_c[1] = -dir.x;
if (dir.y > 0) dir_c[2] = dir.y; else dir_c[3] = -dir.y;
if (dir.z > 0) dir_c[4] = dir.z; else dir_c[5] = -dir.z;
for (int j = 0; j < pulse.Length; j++)
{
//Todo: confirm that pulse comes in at right times...
int t_c = index + j;
double p_t = omni_pr * pulse[j] / 4096;
if (!H_d.Keys.Contains<int>(index + j))
{
H_d.Add(t_c, p_t);
H_directional[0].Add(t_c, p_t * dir_c[0]);
H_directional[1].Add(t_c, p_t * dir_c[1]);
H_directional[2].Add(t_c, p_t * dir_c[2]);
H_directional[3].Add(t_c, p_t * dir_c[3]);
H_directional[4].Add(t_c, p_t * dir_c[4]);
H_directional[5].Add(t_c, p_t * dir_c[5]);
}
else
{
H_d[t_c] += (float)(p_t);
H_directional[0][t_c] += p_t * dir_c[0];
H_directional[1][t_c] += p_t * dir_c[1];
H_directional[2][t_c] += p_t * dir_c[2];
H_directional[3][t_c] += p_t * dir_c[3];
H_directional[4][t_c] += p_t * dir_c[4];
H_directional[5][t_c] += p_t * dir_c[5];
}
}
}
}
int minsample = H_d.Keys.Min();
int maxsample = H_d.Keys.Max();
double T0 = (double)minsample / SampleRate;
H = new double[maxsample - minsample];
double[][] Hdir = new double[6][];
for(int j = 0; j < 6; j++) Hdir[j] = new double[maxsample - minsample];
for (int j = minsample; j < maxsample; j++) if (H_d.Keys.Contains<int>(j))
{
H[j - minsample] = H_d[j];
Hdir[0][j - minsample] = H_directional[0][j];
Hdir[1][j - minsample] = H_directional[1][j];
Hdir[2][j - minsample] = H_directional[2][j];
Hdir[3][j - minsample] = H_directional[3][j];
Hdir[4][j - minsample] = H_directional[4][j];
Hdir[5][j - minsample] = H_directional[5][j];
}
///Enter the reflection
PathVertices.RemoveAll(item => item == null);
ThreadPaths[rec_id, Threadid].Add(new Compound_Path(PathVertices.ToArray(), Sequence, Src.Source_ID(), H, Hdir, T0, Speed_of_Sound, ref Direct_Time[rec_id], Threadid));
}
}
/// <summary>
/// This function calculates the actual path of the specular reflection.
/// </summary>
/// <param name="Images">The list of images.</param>
/// <param name="Sequence">The list of surface indices for reflection.</param>
/// <param name="Threadid">The id of the calling thread.</param>
private void ProcessImages(Hare.Geometry.Point[] Images, int[] Sequence, int rec_id, int Threadid)
{
double[] Trans_Mod = new double[8];
int[] Seq_Polys = new int[Sequence.Length];
for (int t_oct = 0; t_oct < 8; t_oct++) Trans_Mod[t_oct] = 1;
Hare.Geometry.Point[] PathVertices = new Hare.Geometry.Point[Sequence.Length + 2];
PathVertices[0] = Src.H_Origin();
PathVertices[PathVertices.Length - 1] = Rec[rec_id];
//Find all Path Legs from Receiver to Source
for (int q = Sequence.Length; q > 0; q--) if (!OcclusionIntersect(PathVertices[q + 1], Images[q - 1], Sequence[q - 1], ref Trans_Mod, ref PathVertices[q], ref Seq_Polys[q - 1], Threadid)) return;
//Final Occlusion Check:
if (FinalOcclusion(PathVertices[0], PathVertices[1], Sequence[0], ref Trans_Mod, Threadid)) return;
Specular_Path SP = new Specular_Path(PathVertices, Sequence, Seq_Polys, Room, Src, Speed_of_Sound, Trans_Mod, ref Direct_Time[rec_id], Threadid, Rnd[Threadid].Next());
ThreadPaths[rec_id, Threadid].Add(SP);
}
/// <summary>
/// Processes image source paths with input of only a sequence of indices.
/// </summary>
/// <param name="Sequence">The input sequence of surface indices.</param>
/// <param name="Threadid">The id of the calling thread.</param>
/// <param name="rec_id">The id of the receiver.</param>
/// <returns>True if a valid path, false if not.</returns>
private bool ProcessPath(int[] Sequence, int Threadid, int rec_id)
{
Hare.Geometry.Point RefPoint;
Hare.Geometry.Point NextPoint = new Hare.Geometry.Point();
Hare.Geometry.Point[] Images = new Hare.Geometry.Point[Sequence.Length];
RefPoint = Src.H_Origin();
int[] Seq_Polys = new int[Sequence.Length];
double[] Trans_Mod = new double[8];
for (int t_oct = 0; t_oct < 8; t_oct++) Trans_Mod[t_oct] = 1;
//Find all Source Images
for (int q = 0; q < Sequence.Length; q++)
{
//RefPM = Room.PlaneMembers[Sequence[q]];
Images[q] = Room.Image(RefPoint, 0, Room.PlaneMembers[Sequence[q]][0]);
RefPoint = Images[q];
}
ProcessImages(Images, Sequence, rec_id, Threadid);
//Hare.Geometry.Point[] PathVertices = new Hare.Geometry.Point[Sequence.Length + 2];
//PathVertices[0] = Src.H_Origin();
//PathVertices[PathVertices.Length - 1] = Rec[rec_id];
//RefPoint = Rec[rec_id];
////Find all Path Legs from End to Start
//int Limit = Sequence.Length - 1;
//for (int q = Limit; q >= 0; q--)
//{
// if (!OcclusionIntersect(PathVertices[q + 2], Images[q], Sequence[q], ref Trans_Mod, ref RefPoint, ref Seq_Polys[q], Threadid))
// return false;
// PathVertices[q + 1] = RefPoint;
//}
////Final Occlusion Check:
//if (!FinalOcclusion(PathVertices[0], PathVertices[1], Sequence[0], ref Trans_Mod, ref RefPoint, Threadid))
// return false;
//Specular_Path SP = new Specular_Path(PathVertices, Sequence, Seq_Polys, Oct_choice, Room, Src, Speed_of_Sound, Trans_Mod, ref Direct_Time[rec_id], Threadid, Rnd[Threadid].Next());
//ThreadPaths[rec_id, Threadid].Add(SP);
return true;
}
/// <summary>
/// Checks a path for occlusions in the model.
/// </summary>
/// <param name="Src"></param>
/// <param name="EndPt"></param>
/// <param name="Poly_X"></param>
/// <param name="X_Point"></param>
/// <param name="Thread_Id">The id of the calling thread.</param>
/// <returns></returns>
private bool FinalOcclusion(Hare.Geometry.Point Src, Hare.Geometry.Point EndPt, int Poly_X, ref double[] Trans_Mod, int Thread_Id)
{
Hare.Geometry.Vector D = (Src - EndPt);
double L = D.Length();
double L2 = 0;
D.Normalize();
Ray R = new Ray(EndPt, D, Thread_Id, Rnd[Thread_Id].Next());
Hare.Geometry.X_Event X;
do
{
if (Room.shoot(R, 0, out X) && Room.IsTransmissive[X.Poly_id] && Poly_X != Room.PlaneID(X.Poly_id) && X.t < 0.001)
{
///The ray hit something transparent. Account for this...
double[] Absorption = Room.AbsorptionValue[X.Poly_id].Coefficient_A_Broad();
for (int oct = 0; oct < 8; oct++) Trans_Mod[oct] *= (1-Absorption[oct]) * Room.TransmissionValue[X.Poly_id][oct];
R.origin = X.X_Point;
R.Ray_ID = Rnd[Thread_Id].Next();
L2 += X.t;
continue;
}
break;
} while (true);
///If it hits nothing, then there is nothing occluding... IsOccluded = false
if (!X.Hit) return false;
///If the thing it hit is closer than the source, then it is occluded... IsOccluded = true
L2 += X.t;
if (L2 < L) return true;
///If we got this far, then there is nothing occluding...
return false;
}
//Edge Diffraction Version of the Final Occlusion Check.
private bool FinalOcclusion(Hare.Geometry.Point Src, Hare.Geometry.Point EndPt, double tol, int Poly_1, int Poly_2, ref double[] Trans_Mod, int Thread_Id)
{
Hare.Geometry.Vector D = (Src - EndPt);
double L = D.Length();
double L2 = 0;
D.Normalize();
Ray R = new Ray(EndPt, D, Thread_Id, Rnd[Thread_Id].Next());
Hare.Geometry.X_Event X;
do
{
////////////////////////////////////////////////////////////////////////////////////////////////////////
//Change this so that it checks for the edge the BREPS the edge is on when x.t is less than tolerance.
////////////////////////////////////////////////////////////////////////////////////////////////////////
if (Room.shoot(R, 0, out X) && (Room.IsTransmissive[X.Poly_id] || (X.t < tol && (Room.BrepID(X.Poly_id) == Poly_1 || Room.BrepID(X.Poly_id) == Poly_2))))//(Poly_2 != Room.PlaneID(X.Poly_id) || Poly_1 != Room.PlaneID(X.Poly_id)))
{
///The ray hit something transparent. Account for this...
double[] Absorption = Room.AbsorptionValue[X.Poly_id].Coefficient_A_Broad();
for (int oct = 0; oct < 8; oct++) Trans_Mod[oct] *= (1 - Absorption[oct]) * Room.TransmissionValue[X.Poly_id][oct];
R.origin = X.X_Point;
R.Ray_ID = Rnd[Thread_Id].Next();
L2 += X.t;
continue;
}
break;
} while (true);
///If it hits nothing, then there is nothing occluding... IsOccluded = false
if (!X.Hit) return false;
///If the thing it hit is closer than the source, then it is occluded... IsOccluded = true
L2 += X.t;
if (L2 < L) return true;
///If we got this far, then there is nothing occluding...
return false;
}
/// <summary>
/// Checks a path for occlusions in the model.
/// </summary>
/// <param name="Origin"></param>
/// <param name="EndPt"></param>
/// <param name="Poly_X"></param>
/// <param name="X_Point"></param>
/// <param name="Thread_Id">The id of the calling thread.</param>
/// <returns></returns>
private bool OcclusionIntersect(Hare.Geometry.Point Origin, Hare.Geometry.Point EndPt, int Poly_X, ref double[] Trans_Mod, ref Hare.Geometry.Point X_Point, ref int Poly_Seq, int Thread_Id)
{
Hare.Geometry.Vector D = (EndPt - Origin);
D.Normalize();
Ray R = new Ray(Origin, D, Thread_Id, Rnd[Thread_Id].Next());
Hare.Geometry.X_Event X = new Hare.Geometry.X_Event();
do
{
if (Room.shoot(R, 0, out X) && Room.IsTransmissive[X.Poly_id] && Poly_X != Room.PlaneID(X.Poly_id))
{
double[] Absorption = Room.AbsorptionValue[X.Poly_id].Coefficient_A_Broad();
for (int oct = 0; oct < 8; oct++) Trans_Mod[oct] *= (1 - Absorption[oct]) * Room.TransmissionValue[X.Poly_id][oct];
R.origin = X.X_Point;
R.Ray_ID = Rnd[Thread_Id].Next();
continue;
}
break;
} while (true);
if (X.t < 0.000001)
return false;
if (Poly_X != Room.PlaneID(X.Poly_id))
{
//Guid G1 = Rhino.RhinoDoc.ActiveDoc.Objects.Add(new Rhino.Geometry.LineCurve(Utilities.PachTools.HPttoRPt(X.X_Point), Utilities.PachTools.HPttoRPt(EndPt)));
//Guid G2 = Rhino.RhinoDoc.ActiveDoc.Objects.Add(new TextDot(Room.PlaneID(X.Poly_id).ToString(), Utilities.PachTools.HPttoRPt(EndPt)));
//Rhino.RhinoDoc.ActiveDoc.Groups.Add(new Guid[2] { G1, G2 });
return false;
}
Poly_Seq = X.Poly_id;
X_Point = X.X_Point;
return true;
}
/// <summary>
/// Checks a path for occlusions in the model.
/// </summary>
/// <param name="Origin"></param>
/// <param name="EndPt"></param>
/// <param name="Poly_X"></param>
/// <param name="X_Point"></param>
/// <param name="Thread_Id">The id of the calling thread.</param>
/// <returns></returns>
private bool OcclusionIntersectED(Hare.Geometry.Point Origin, Hare.Geometry.Point EndPt, int Poly_X, ref double[] Trans_Mod, ref Hare.Geometry.Point X_Point, int Thread_Id)//ref double[] Trans_Mod
{
Hare.Geometry.Vector D = (EndPt - Origin);
double L = D.Length();
D /= L;
Ray R = new Ray(Origin, D, Thread_Id, Rnd[Thread_Id].Next());
Hare.Geometry.X_Event X = new Hare.Geometry.X_Event();
do
{
if (Room.shoot(R, 0, out X) && Room.IsTransmissive[X.Poly_id])// && Poly_X != Room.PlaneID(X.Poly_id))
{
double[] Absorption = Room.AbsorptionValue[X.Poly_id].Coefficient_A_Broad();
for (int oct = 0; oct < 8; oct++) Trans_Mod[oct] *= (1 - Absorption[oct]) * Room.TransmissionValue[X.Poly_id][oct];
R.origin = X.X_Point;
R.Ray_ID = Rnd[Thread_Id].Next();
continue;
}
break;
} while (true);
if (X.t < L - 0.0001 && X.t != 0) return false;
//if (Poly_X != Room.PlaneID(X.Poly_id))
//{
// //Guid G1 = Rhino.RhinoDoc.ActiveDoc.Objects.Add(new Rhino.Geometry.LineCurve(Utilities.PachTools.HPttoRPt(X.X_Point), Utilities.PachTools.HPttoRPt(EndPt)));
// //Guid G2 = Rhino.RhinoDoc.ActiveDoc.Objects.Add(new TextDot(Room.PlaneID(X.Poly_id).ToString(), Utilities.PachTools.HPttoRPt(EndPt)));