Hi everyone, I need to intersect multiple Dynamo Solids with an imported mesh from a Revit Topography to calculate the excavation volume. I faced some difficulties here. The mesh Toolkit is not working with my mesh, converting the mesh to a Dynamo mesh by using the Vertices and FaceIndices also did…

You could convert the mesh to a polysurface and try to intersect This might help … [image] Perimeter points of a topo Revit You could convert topo mesh to a polysurface and extract perimeter curves [image]

Thanks @Vikram_Subbaiah . Now I have converted the mesh into a Solid.ByJoinedSurfaces(). When I now want to intersect my generated solids with the terrain solid, Geometry.IntersectAll results in an empty list´. I also tried Solid.DifferenceAll getting an error saying “cannot Difference two solids”.

@Fabian_Ritter You will need to provide some visual clues and/or files.

Isn’t the Revit method of doing that is with Topo, Pads, and Phases? [image] About Reporting Cut and Fill Volumes on a Site | Revit Products | Autodesk... Revit can report cut and fill volumes on a site to aid in determining the costs of landscape modification during site development. Re…

@truevis : More or less, yes. But I need to create the second topo somehow. All I have is the imported mass of the terrain and my basements. I create the excavation volumes using a working space and the angle of embankment for the basements. I can then also import the new topo in Revit and use this m…

@Vikram_Subbaiah : Here’s a screen shot. [image] If I use the Intersect method, it works, but IntersectAll isn’t working. I also tried filtering first, because some of my solids do not intersect the geometry.

btw: DoesIntersect returns around 250 times true :slight_smile:

Geometry.Intersect will also work with multiple geometry. Try replacing Geometry.IntersectAll with it. Change Lacing, if necessary.

First didn’t work either. But update Dynamo to version 1.1.0 helped a lot. Thanks for the help. Now the only problem left is that with intersect I get a lot of seperate solids. I have 5 groups of solids intersecting each other (you can also see it in the image) and I union them seperatly. For 4 gro…

@Fabian_Ritter You really need to provide files for us to look at.

Best way to intersect solids with a mesh

Geometry

Vikram_Subbaiah July 25, 2016, 9:39am 2

You could convert the mesh to a polysurface and try to intersect
This might help …

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Best way to intersect solids with a mesh

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