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Commit 03021c62 authored by Lukas Aspöck's avatar Lukas Aspöck
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- added method setModelToShoebox which allows you define/create/simulate a shoebox room 

- added example script for the simulation of a shoebox room created by this method
parent 44213cb2
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Showing with 206 additions and 23 deletions
applications/VirtualAcoustics/Raven/itaRavenProject.m
View file @ 03021c62
......@@ -275,7 +275,7 @@ classdef itaRavenProject < handle
obj.ravenExe = [ selectedRavenPath selectedRavenExe];
else
obj.ravenExe = locatedRavenExe;
end
if (~ravenIniExists)
......@@ -589,7 +589,7 @@ classdef itaRavenProject < handle
function keepImpulseResponseFiles(obj, keepFiles)
% keepImpulseResponseFiles
%
% By default, RAVEN Impulse Responses are deleted from the hard disk
% By default, RAVEN Impulse Responses are deleted from the hard disk
% after simulation and are only available in your rpf project
%
% By setting keepOutFiles to 1 / true, results are kept in
......@@ -598,7 +598,7 @@ classdef itaRavenProject < handle
obj.keepOutputFiles = keepFiles;
obj.rpf_ini.SetValues('Global', 'keepOutputFiles', keepFiles);
obj.rpf_ini.WriteFile(obj.ravenProjectFile);
end
end
%------------------------------------------------------------------
function openOutputFolder(obj)
......@@ -716,6 +716,123 @@ classdef itaRavenProject < handle
obj.rpf_ini.WriteFile(obj.ravenProjectFile);
end
%------------------------------------------------------------------
function [outputFilePath] = setModelToShoebox(obj, length,width,height)
% setModelToShoebox
% creates a shoebox room model and automatically sets the model
% of the current project to the defined shoebox room.
% The shoebox room has 6 materials assigned (matShoebox1 ..
% matShoebox6), which can be set using
% rpf.setMaterial(matShoebox1,abs,scat)
%
% surface order:
% (1) floor, (2) ceiling,
% (3) larger wall (length x height; left, view from origin)
% (4) smaller wall (width x height; front)
% (5) larger wall (length x height; right)
% (6) smaller wall (width x height; back)
% Using:
% outputFileName = rpf.setModelToShoebox(myLength,myWidth,myHeight);
%
% see ita_raven_demo_shoebox for more details on usage
%
% Input:
% length, width, height (all in meters)
%
% Output:
% outputFilePath: full path of save ac3d model
%
outputFileName = ['Shoebox_' num2str(length) 'x' num2str(width) 'x' num2str(height) '.ac' ];
if strfind(obj.modelFileList,'RavenModels')
outputFilePath = [ obj.modelFileList(1:strfind(obj.modelFileList,'RavenModels')+10) '\' outputFileName ];
else
% if model wasn't stored in RavenModels folder, save it in
% the folder of the current rpf file.
outputFilePath = [ fileparts(obj.ravenProjectFile) '\' outputFileName ];
end
fid = fopen(outputFilePath,'w');
fprintf(fid,'AC3Db\n');
for iMat=1:6
fprintf(fid,['MATERIAL "matShoebox' num2str(iMat) '" rgb ' num2str(0.0) ' ' num2str(0.0) ' ' num2str(0.1*iMat) ' amb 0.2 0.2 0.2 emis 0 0 0 spec 0.2 0.2 0.2 shi 128 trans 0 \n']);
end
fprintf(fid,'OBJECT world\n');
fprintf(fid,'kids 6\n');
lS=sprintf('%1.4f',length);
wS=sprintf('%1.4f',-width);
hS=sprintf('%1.4f',height);
for iWall=1:6
fprintf(fid,'OBJECT poly\n');
fprintf(fid,'name "polygon_object"\n');
fprintf(fid,'numvert 4\n');
if iWall==1
fprintf(fid,'0 0 0\n');
fprintf(fid,[lS ' 0 0\n']);
fprintf(fid,[lS ' 0 ' wS '\n']);
fprintf(fid,['0 0 ' wS '\n']);
end
if iWall==2
fprintf(fid,[lS ' ' hS ' 0\n']);
fprintf(fid,['0 ' hS ' 0\n']);
fprintf(fid,['0 ' hS ' ' wS '\n']);
fprintf(fid,[lS ' ' hS ' ' wS '\n']);
end
if iWall==3
fprintf(fid,[lS ' 0 0\n']);
fprintf(fid,'0 0 0\n');
fprintf(fid,['0 ' hS ' 0\n']);
fprintf(fid,[lS ' ' hS ' 0\n']);
end
if iWall==4
fprintf(fid,'0 0 0\n');
fprintf(fid,['0 0 ' wS '\n']);
fprintf(fid,['0 ' hS ' ' wS '\n']);
fprintf(fid,['0 ' hS ' 0\n']);
end
if iWall==5
fprintf(fid,['0 0 ' wS '\n']);
fprintf(fid,[lS ' 0 ' wS '\n']);
fprintf(fid,[lS ' ' hS ' ' wS '\n']);
fprintf(fid,['0 ' hS ' ' wS '\n']);
end
if iWall==6
fprintf(fid,[lS ' 0 ' wS '\n']);
fprintf(fid,[lS ' 0 0\n']);
fprintf(fid,[lS ' ' hS ' 0\n']);
fprintf(fid,[lS ' ' hS ' ' wS '\n']);
end
fprintf(fid,'numsurf 1\n');
fprintf(fid,'SURF 0x10\n');
fprintf(fid,['mat ' num2str(iWall-1) '\n']);
fprintf(fid,'refs 4\n');
fprintf(fid,'3 0 0\n');
fprintf(fid,'2 0 0\n');
fprintf(fid,'1 0 0\n');
fprintf(fid,'0 0 0\n');
fprintf(fid,'kids 0\n');
end
fclose(fid);
obj.setModel(outputFilePath);
end
%------------------------------------------------------------------
function plotModel(obj, tgtAxes, comp2axesMapping, wireframe)
if isempty(obj.modelFileList)
......@@ -916,7 +1033,7 @@ classdef itaRavenProject < handle
% remove [1] in legend entry
for iMat=1:numberMaterials
leg.String{iMat} = leg.String{iMat}(1:end-4);
end
end
% export plot to raven output
if (exportPlot)
......@@ -929,7 +1046,7 @@ classdef itaRavenProject < handle
set(gcf,'PaperUnits','inches','PaperPosition',1.34*[0 0 8 5]);
if strcmpi(fileType,'pdf')
set(gcf,'PaperUnits','centimeters','PaperSize',[25.7, 16.5]);
set(gcf,'PaperUnits','centimeters','PaperSize',[25.7, 16.5]);
print('-dpdf','-r200', fileNamePDF);
close(currentPlot);
else
......@@ -1010,7 +1127,7 @@ classdef itaRavenProject < handle
set(gcf,'PaperUnits','inches','PaperPosition',1.34*[0 0 8 5]);
if strcmpi(fileType,'pdf')
set(gcf,'PaperUnits','centimeters','PaperSize',[25.7, 16.5]);
set(gcf,'PaperUnits','centimeters','PaperSize',[25.7, 16.5]);
print('-dpdf','-r200', fileNamePDF);
close(currentPlot);
else
......@@ -1644,7 +1761,7 @@ classdef itaRavenProject < handle
obj.rpf_ini.SetValues('RayTracing', 'resolutionElevation_DetectionSphere', resEle);
obj.rpf_ini.WriteFile(obj.ravenProjectFile);
end
%------------------------------------------------------------------
function setFilterLength(obj, filter_length) % filter length parameter needed in [ms]
if filter_length < 3
......@@ -1771,15 +1888,15 @@ classdef itaRavenProject < handle
% setOutputPath(path)
%
% Set the RAVEN output path. If you keep the output files
% (cf. keepOutputFiles variable / method keepOutputFiles),
% (cf. keepOutputFiles variable / method keepOutputFiles),
% Impulse Responses as wave files are stored here :
% <projectName>/<date>/<time>/<IRtype>)
%
%
% Absorption and scattering plots are also saved here.
%
% Use method openOutputFolder to open result folder.
%
%
obj.pathResults = path;
obj.rpf_ini.SetValues('Global', 'ProjectPath_Output', path);
obj.rpf_ini.WriteFile(obj.ravenProjectFile);
......@@ -3073,7 +3190,7 @@ classdef itaRavenProject < handle
end
% determine factor (default: 0.161) and air absorption
% factor = 24*log(10) / calculateSoundSpeed(obj.getTemperature, obj.getHumidity,obj.getPressure);
% factor = 24*log(10) / calculateSoundSpeed(obj.getTemperature, obj.getHumidity,obj.getPressure);
factor = 0.161;
airAbsorption = determineAirAbsorptionParameter(obj.getTemperature, obj.getPressure, obj.getHumidity);
......@@ -3751,12 +3868,12 @@ classdef itaRavenProject < handle
% check back the reverberation times
numSources=size(obj.getSourcePosition,1);
thisReverbTime = obj.getT30(true,false,false,0);
for iSources=2:numSources
thisReverbTime = thisReverbTime + obj.getT30(true,false,false,iSources-1);
end
thisReverbTime = thisReverbTime / numSources;
thisReverbTime = obj.getT30(true,false,false,0);
for iSources=2:numSources
thisReverbTime = thisReverbTime + obj.getT30(true,false,false,iSources-1);
end
thisReverbTime = thisReverbTime / numSources;
% if desired, rename the materials of the model
if isempty(obj.model)
......@@ -3799,17 +3916,17 @@ classdef itaRavenProject < handle
if numel(targetReverbTime) == 10 % go to octave resolution
A = mean([A(2:3:end);A(3:3:end); A(4:3:end)]);
% A = A(3:3:end);
% A = A(3:3:end);
equivalentAirAbsorptionArea = mean([equivalentAirAbsorptionArea(2:3:end);equivalentAirAbsorptionArea(3:3:end); equivalentAirAbsorptionArea(4:3:end)]);
% equivalentAirAbsorptionArea = equivalentAirAbsorptionArea(3:3:end);
% equivalentAirAbsorptionArea = equivalentAirAbsorptionArea(3:3:end);
end
alphas_default = 1 - exp(((-0.163 * roommodel.getVolume() ./ targetReverbTime) - equivalentAirAbsorptionArea)/(S));
% alphas_alt = min((A+equivalentAirAbsorptionArea)/S,1);
% alphas_alt = min((A+equivalentAirAbsorptionArea)/S,1);
alphas_alt = (A+equivalentAirAbsorptionArea)/S;
alphas_neu = abs(1 - (1 - alphas_alt(:)).^(thisReverbTime(:) ./ targetReverbTime(:)));
% alphas_neu = 1 - (1 - alphas_alt(:)).^(thisReverbTime(:) ./ targetReverbTime(:));
% alphas_neu = 1 - (1 - alphas_alt(:)).^(thisReverbTime(:) ./ targetReverbTime(:));
absorptionFactors = alphas_neu(:) ./ alphas_alt(:);
absorptionFactors(isnan(absorptionFactors)) = 1;
......
applications/VirtualAcoustics/Raven/ita_raven_demo_shoebox.m 0 → 100644
View file @ 03021c62
%% RAVEN simulation: Example for creating shoebox room model
% Author: las@akustik.rwth-aachen.de
% date: 2019/04/10
%% project settings
myLength=10;
myWidth=8;
myHeight=3;
projectName = [ 'myShoeboxRoom' num2str(myLength) 'x' num2str(myWidth) 'x' num2str(myHeight) ];
%% create project and set input data
rpf = itaRavenProject('C:\ITASoftware\Raven\RavenInput\Classroom\Classroom.rpf'); % modify path if not installed in default directory
rpf.copyProjectToNewRPFFile(['C:\ITASoftware\Raven\RavenInput\' projectName '.rpf' ]);
rpf.setProjectName(projectName);
rpf.setModelToShoebox(myLength,myWidth,myHeight);
% set values of six surfaces:
% 10% absorption and 10% scattering for floor and ceiling
% Identical material with 5% absorption and 20% scattering for walls
for iMat=1:2
myAbsorp = 0.1 * ones(1,31);
myScatter = 0.1 * ones(1,31);
rpf.setMaterial(rpf.getRoomMaterialNames{iMat},myAbsorp,myScatter);
end
for iMat=3:6
myAbsorp = 0.05 * ones(1,31);
myScatter = 0.2 * ones(1,31);
rpf.setMaterial(rpf.getRoomMaterialNames{iMat},myAbsorp,myScatter);
end
% uncomment to see plot of room and absorption coefficient
% rpf.plotMaterialsAbsorption;
% rpf.plotModel;
%% set simulation parameters
rpf.setGenerateRIR(1);
rpf.setGenerateBRIR(1);
rpf.setSimulationTypeRT(1);
rpf.setSimulationTypeIS(1);
rpf.setNumParticles(20000);
rpf.setISOrder_PS(2);
%% run simulation
rpf.run
% RIR = rpf.getMonauralImpulseResponseItaAudio;
% RIR.ptd;
T30_firstRoom = rpf.getT30;
% Now change the room, double all dimensions
rpf.setModelToShoebox(myLength*2,myWidth*2,myHeight*2);
rpf.run;
T30_secondRoom = rpf.getT30;
%% plot results
figure;
semilogx(rpf.freqVectorOct,[T30_firstRoom T30_secondRoom]','LineWidth',1.5,'Marker','x');
grid on;ylabel('T30 in s');xlabel('Frequency in Hz');title('T30 of two shoebox rooms');xlim([20 20000]);
legend(['Room 1 (V= ' num2str(myLength*myWidth*myHeight) ' m)'],['Room 2 (V= ' num2str(2*myLength*2*myWidth*2*myHeight) ' m)']);
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