34_mountain2modell

Create a 3D inverse mold.

Requirements

Repository lokal klonen

  1. Navigate to workspace
cd /path/to/workspace
  1. clone repository
git clone https://github.com/loopercamera/34_mountain2modell.git

Python-Requirements

Following python requirements are needed.

Die Module können über das requirements.txt im gewünschten Prompt

  1. Create a python environment:
conda create -n my_env python=3.8.19 -c conda-forge --file path/to/requirements.txt
  1. Select area of interest:

  1. Copy the links to the file download_list_swissALTI3D.csv:

  2. Start download process

python alti_3d_downloader.py

QGIS plugin installation

  1. Open QGIS-project mountain2modell_QGIS_Projek.qgzt
  2. Open plugin –> Manage and Install Plugins..
  3. Under ALL search:
DEMto3D
  1. Install Plugin
  2. Close the window plugin

QGIS merge TIF into one File

  1. Open Raster –> miscellaneous –> Merge –> three points (left side)
  2. Add Directory –> navigate to the folder TIF_download
  3. All TIF files should be checked now
  4. Run
  5. The downloaded TIF File are now merged into one File. The file is not saved, it is only temporary
  6. Close

Clip to the preferred cutout

  1. Layer –> Create Layer –> New temporary scratch layer
  2. Name it
  3. Set the geometry Type to Polygon
  4. OK
  5. Add polygon
  6. Select a shape, linke square, circle oder polygon
  7. Draw the the are an the map an finish with right click
  8. End editing
  9. Raster –> Extraction –> Clip Raster by Mask Layer
  10. Set the input layer to the bevor merged raster layer
  11. Set the mask layer to the layer with your preferred cutout
  12. Run
  13. Close

Save clipped layer

  1. Right click on the clipped layer –> Export –> Save As…
  2. File name –> three points (left side)
  3. Navigate into folder TIF_merge
  4. Name the file
  5. Save
  6. OK
  7. Select the files create bevor and remove them
  8. Select the saved file –> right click –> Properties –> Transparency
  9. Under No Data Value –> Additional no data value
  10. Set the Value to 0
  11. OK

Create a STL file

  1. Open the plugin DEM 3D printing
  2. Select the TIF layer
  3. Click the button Select full extent (it may take a while)
  4. Set spacing spacing
  5. Set the size
  6. Set the Height lower than to lowest point to create a base
  7. Export STL
  8. Navigate into folder STL
  9. Save (it may take a while)

Create a negativ in Blender

Don’t work with circles. With big models, Blender needs some time to process. So patience is needed.

  1. Open the blender project mountain2modell_blender_Projekt.blend
  2. File –> Import –> STL
  3. Add Cube (Shift + a)
  4. Set the scale in the X and Y-axis,
  5. Select the terrain and set the origin to geometry (right click –> Set Origin –> Geometry to origin)
  6. Grab the terrain and move it up in the Z-Axis at the same hight as the cube. (Prss g after that z to move the object along the axis)
  7. Select the Cube move it in the Z-Axis, so that the terrain is locking throw the cube.
  8. Chance to modeling
  9. Select the upper face and extrude it over the tip of the terrain. (press e)
  10. Change back to layout
  11. Add modifier boolean, difference and select the terrain
  12. Apply to all
  13. Select the terrain and delete it
  14. Select the cube and rote it in the Y-Axis 180 degree (press g , z and enter 180)
  15. Grab the cube and move it up the Z-Axis (press g, z)
  16. Export the cube as STL file ( File –> Export –> STL)