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+--- Thread: Create holes on a mesh (/showthread.php?tid=4236)
Create holes on a mesh - kreativasas - 01-12-2021
Hi,
i need to create a hole on a mesh.
I thought to create a cilynder and use some boolean functions like meshdifference etc,
How i can do, is there in powerToys a function to do that?
Thanks
RE: Create holes on a mesh - abenedik - 01-13-2021
There is Ab3d.Utilities.MeshBooleanOperations class that can calculate subtraction, addition or intersecion.
See "Advanced 3D objects / Mesh Boolena operations" or "Use cases / Modelling with subtraction" samples in the Ab3d.PowerToys samples project.
RE: Create holes on a mesh - kreativasas - 02-04-2021
Ok it works!!
I used Ab3d.Utilities.MeshBooleanOperations.Subtract(modelvisual3d, geometrymesh3d) and i have at least the modelvisual correctly modified with the subtraction.
But a problem qith transformations.
Before using subtract i need to make some translation transformation on modelvisual.
Ofter using subtract the modelvisual losts its transformation and retuns in the original place (before transformations)
Why???
RE: Create holes on a mesh - kreativasas - 02-04-2021
ok solved.
It needs to reset transformation after boolean subtract
RE: Create holes on a mesh - kreativasas - 02-08-2021
Hi.... another problem.
I understand how create a hole on a mesh, using subtract (i have a mesh and a cylinder, i subtract the cylinder from the mesh and all works).
But i need to create a hole on multiple very similar meshes.
so:
- I load with assimp the first mesh
- apply the necessary transformation to geometrymodel (to move the model over the cylinder)
- i use Ab3d.Utilities.MeshBooleanOperations.Subtract(geometrymodel,meshgeometry)
- the geometrymodel resuts ok with the necessary hole
but when i load the next model, i move over the cylindre (like the first one) the subtract retuns: "Reference to an object not set to an object instance"
using subtract on 10 similar models the error appears random 1 o 2 times.....
anybody can help me?
note that the models are very similar and there is no reason to fail the subtract!!