img2scad

Texture map images onto OpenSCAD surfaces, optionally rendering to STL.

Here is a preview of the planetary maps of the solar system found in images/1k/, converted to OpenSCAD, and then rendered to STL:

These STLs can be downloaded on PrusaPrinters or Thingiverse.

Usage

Run:

./img2scad.kts <jpg folder> <scad folder> <stl folder> <optional: openscad command>

For example:

./img2scad.kts "jpg" "scad" "stl" "flatpak run org.openscad.OpenSCAD"

Pick up all images in the jpg/ folder, generate OpenSCAD polyhedrons based on them, and write them to scad/.

Note: Planetary samples are provided in images/.../. Higher resolutions provide more details but are slower and resource intensive.
Export all OpenSCAD files in the scad/ folder as STLs to stl/. This step is optional and only runs because the OpenSCAD command is specified.

Note: This step is slow and requires a lot of RAM, e.g., up to 15GB for earth in 1k resolution.

Configuration

Shapes

The code renders onto a sphere, though img2scad.kt can be adjusted to render onto just about any surface, provided you represent it mathematically. In the source code, an example is provided for a disk.

For any adjustment, review:

scad/model.scad-suffix: By default, it provides a round base, which might not make sense for non-spherical shapes.
scad/*.scad & scad/*.scad-prefix: By default, this separation is used to scale each planet diameter by log2(diameter/1000), which you might not want.

Texture

Increase or decrease the intensity of the texture by tweaking the depth argument of writeScad() in img2scad.kt.

Acknowledgements

Texture Mapping OpenScad's processing program is the foundation for the code in this repository.

Sample images of the solar system are provided by Solar System Scope.

tzolov / img2scad