Report Lambda Examples

using System;

using System.IO;

using System.IO.Compression;

using VoxelFarm.SpatialLambda;

namespace TestLambdas

{

   // This Report Lambda uses a Sum to compute the volume of an object

 

public class EntityVolume : VoxelFarm.SpatialLambda.IVoxelFarmReportLambda

   {

     

public SpatialLambdaResult Done(IVoxelFarmReportDoneLambdaHost host)

       {

         

var result = new SpatialLambdaResult(0);

         

return result;

       }

     

public SpatialLambdaResult RunReport(IVoxelFarmReportLambdaHost host)

       {

         

// get inputs

         

int entity = host.InputEntity("0", "Volume Source",

               VoxelFarm.SpatialLambda.EntityType.VoxelTerrain |

               VoxelFarm.SpatialLambda.EntityType.BlockModel |

               VoxelFarm.SpatialLambda.EntityType.MaterialTracking |

               VoxelFarm.SpatialLambda.EntityType.VoxelGenerator);

         

// ask the platform to load voxels for the entity including volume for each voxel

         

int voxels = host.LoadVoxels(entity, VoxelFarm.SpatialLambda.Attribute.Volume, "");

         

double sum = 0.0;

         

int channelCount = host.GetChannelCount(voxels);

         

for (int channel = 0; channel < channelCount; channel++)

           {

             

// get array with volume values, one per voxel

             

float[] volumes = host.GetVolumeBuffer(voxels, channel);

             

// the array can be null if all volume values are zero

             

if (volumes != null)

               {

                 

// add volumes together

                 

double voxelSize = host.GetVoxelVolume();

                 

foreach (float v in volumes)

                   {

                       sum += v * voxelSize;

                   }

               }

           }

         

// report sum results

         

int sumId = host.StartSum("Object", "Volume");

           host.Sum(sumId, sum);

         

var result = new SpatialLambdaResult(0);

         

return result;

       }

   }

   // This Report Lambda uses a List to create a block model file in CSV format out

   // of another volumetric object

 

public class CreateBlockModel : VoxelFarm.SpatialLambda.IVoxelFarmReportLambda

   {

     

public SpatialLambdaResult RunReport(IVoxelFarmReportLambdaHost host)

       {

         

// get inputs

         

int entity = host.InputEntity("0", "Source",

               VoxelFarm.SpatialLambda.EntityType.VoxelTerrain |

               VoxelFarm.SpatialLambda.EntityType.BlockModel |

               VoxelFarm.SpatialLambda.EntityType.MaterialTracking |

               VoxelFarm.SpatialLambda.EntityType.VoxelGenerator);

         

// get buffer with volumes

         

int voxels = host.LoadVoxels(entity, VoxelFarm.SpatialLambda.Attribute.Volume, "");

         

float[] volumes = host.GetVolumeBuffer(voxels, 0);

         

// list voxels with any volume in them

         

if (volumes != null)

           {

             

double voxelSize = host.GetVoxelSize();

             

double[] centroids = host.GetVoxelCentroids();

             

var list = host.StartList("blocks");

             

int index = 0;

             

foreach (float v in volumes)

               {

                 

if (v > 0.0)

                   {

                     

double x = centroids[index];

                     

double y = centroids[index + 1];

                     

double z = centroids[index + 2];

                     

string item = x + "," + y + "," + z + "," + voxelSize + "," + voxelSize + "," + voxelSize + "," + v;

                       host.List(list, item);

                   }

                   index += 3;

               }

           }

         

return new SpatialLambdaResult(0);

       }

     

public SpatialLambdaResult Done(IVoxelFarmReportDoneLambdaHost host)

       {

         

string compressionFolder = host.CreateTempFolder("compress");

         

string uploadsFolder = host.CreateTempFolder("uploads");

         

string blockModelFileName = compressionFolder + "block_model.csv";

         

string headersFileName = uploadsFolder + "headers.csv";

           StreamWriter file = new StreamWriter(blockModelFileName);

           StreamWriter headers = new StreamWriter(headersFileName);

           file.WriteLine("XC,YC,ZC,XS,YS,ZS,DENSITY");

           headers.WriteLine("XC,YC,ZC,XS,YS,ZS,DENSITY");

           headers.Close();

           host.ScanList("blocks", (item) =>

           {

               file.WriteLine(item);

             

return false;

           });

           file.Close();

           ZipFile.CreateFromDirectory(compressionFolder, uploadsFolder + "block_model.zip");

           host.AttachFile("block_model.zip", uploadsFolder + "block_model.zip");

           host.AttachFile("headers.csv", headersFileName);

         

return new SpatialLambdaResult(0);

       }

   }

}