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Thread: 3D Stone wall

  1. #11
    Quantum Mechanic BIGAL's Avatar
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    It would be feasible to create a mesh of points then play with the z value, re triangulating every time, to get something that has a stone face look. Using multiple plines may be another way and create a mesh. A 3d camera would solve the problem very quick.

    Have you looked on google ? Try 3ds max objects 1st.

    For any one have a play with this just made an array of points started to edit the points Z and retriangulated re CIV3D, turned on contours and starting to get a shape. The 3dfaces are in layer c-tinn-view.
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    Quote Originally Posted by LGGreen View Post
    I thought that may be a solution. Big learning process there for a stone that is only 2mm x 4mm! But here goes, nothing ventured, nothing gained. Where is my manual!!!
    2mm x 4mm? I would call that a bb.
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    Quote Originally Posted by BIGAL View Post
    It would be feasible to create a mesh of points then play with the z value, re triangulating every time, to get something that has a stone face look. Using multiple plines may be another way and create a mesh. A 3d camera would solve the problem very quick.

    Have you looked on google ? Try 3ds max objects 1st.

    For any one have a play with this just made an array of points started to edit the points Z and retriangulated re CIV3D, turned on contours and starting to get a shape. The 3dfaces are in layer c-tinn-view.
    I have looked at the block.dwg. Is it an extruded rectangle to form a box. On top of this is an array of 3D surface independent triangles. To move a vertex each of the surrounding triangles needs to be selected then the group of vertices can be moved in the Z direction to form a sort of pyramid. Not sure what the function of the points is at this stage. Finally I assume the triangles have somehow to be joined to make a single surface. This then needs to nbe the top surface of the box to make a 3D solid.

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    On could probably apply this technique (in Blender) to a mesh instead of individual blocks.

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    Lggreen you are right I just did that as a make a shape using points. Randomising the points to get a more irreguar pattern would be better. Again find some one with a 3d scanner and a few minutes work.

    This is a 3d scan of a stormwater drain if you look closely you can see the stone faces in 3d unfortunately image has been scaled down to allow posting.
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    Quote Originally Posted by BIGAL View Post
    Lggreen you are right I just did that as a make a shape using points. Randomising the points to get a more irreguar pattern would be better. Again find some one with a 3d scanner and a few minutes work.

    This is a 3d scan of a stormwater drain if you look closely you can see the stone faces in 3d unfortunately image has been scaled down to allow posting.
    I think I finally managed to 3D model an individual stone. I created a box mesh slightly larger than the final stone size of 3.8mm x 1.8mm (small!).Then by moving the faces/vertices/edges of the top surface of the box I made a rough looking stone. This was converted to a 3D solid with smoothing. This created a box with rounded edges. These were sliced off to reveal the final stone. I am currently 3D printing a prototype. I will post a picture of the result later.
    Although no one managed to come up with a realistic solution your ideas and posts helped me enormously. Thanks for your help guys.

    Screen Shot 2018-04-17 at 16.08.09.jpg

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    Quote Originally Posted by BIGAL View Post
    Lggreen you are right I just did that as a make a shape using points. Randomising the points to get a more irreguar pattern would be better. Again find some one with a 3d scanner and a few minutes work.

    This is a 3d scan of a stormwater drain if you look closely you can see the stone faces in 3d unfortunately image has been scaled down to allow posting.
    This is a 3D printed 20mm cube with the stonework added. Not bad for a first attempt! I need to model a few more stones together with a few 180 degree rotations and mirrored versions to get a more random effect.

    IMG_8669.jpg

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    I would be interested to see the results, what type of printer are you using? in general, a layer thickness of 0.2 to 0.3mm seems the average which isn't going to give you much detail on something that small.
    I hit send and there it was, that actually looks pretty good, well done
    I've just been down graded from 2012LT to full Autocad 2017. I WANT LT BACK

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    Quote Originally Posted by steven-g View Post
    I would be interested to see the results, what type of printer are you using? in general, a layer thickness of 0.2 to 0.3mm seems the average which isn't going to give you much detail on something that small.
    I hit send and there it was, that actually looks pretty good, well done
    I am using a Flashforge Dreamer and Simplify3D slicing software. My layers are 0.1mm and I run the outer layer at a fairly slow speed in order to get the detail.

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    Hi LGGreen

    Here's a potential way to do it...

    1. Use the picture and turn it into an excel spreadsheet - there are some free tools out there such as http://think-maths.co.uk/spreadsheet - each of the cells in the spreadsheet will have a number that refers to the shade of grey.
    2. If you create a mesh that matches the number of cells in the spreadsheet (rows by columns in the excel match the xstep by ystep in the mesh) then use lisp routine to step cell by cell through the excel file and apply the grey-value in each cell to pull the mesh node in the z direction - hey presto - automatic wall.
    3. If you then used mesh2solid.lsp (can be found on the net) you can turn the mesh into a solid and you can apply the picture onto the surface so you got a convincing wall.

    It would take some clever programming, but the technique could be quite good for turning pictures into reliefs if the 3d model was passed through slicer to go into a 3d printer

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