PGM to OpenSCAD surface (normed zero-one)

thingiverse

This is a refined version of the original script, meaning it produces a ".dat" file with grayscale values ranging from 0-255 converted to 0.00-1.00 precision. This approach works particularly well when uploading openSCAD code to Thingiverse's Customizer feature. Note that I'm not a Python expert; I arrived at the correct depthval value through trial and error. If you have Python-related questions, @sawdusty is the authority on this topic. The original script creates a ".dat" file with grayscale values ranging from 0-255 converted to 0.00-7.65, which is acceptable but incompatible with Thingiverse's requirements. Please refer to Thingiverse's Customizer documentation for image surfaces at: http://customizer.makerbot.com/image_surface Additionally, keep in mind that openSCAD's surface command adds a 1mm offset below the zero point when creating surfaces.