slideruleimages 0.0.1

A Python package, with no dependencies, producing SVG images of Slide Rule scales

slideruleimages

Python package to produce Slide Rule SVG images

A typical example might be:

from slideruleimages import Rule

# xvalue is where the C scale index is placed over the D value
# right is True if the mid scale is moved to the right
# right is False if the mid scale is moved to the left
# hairline is where the hairline cursor is placed over the D value,
# or zero if no hairline is used 

rl = Rule(xvalue = 2.0, right = True, hairline=6.0,
          topruleheight = 0,                        # No top rule
          midruleheight = 120,                      # middle slider 120px high
          btmruleheight = 120)                      # bottom rule 120 px high

# Add a C scale
rl.addCscale(midrule=20)  # indicates this scale is put on the middle rule
                          # 20 pixels down from the top of the middle rule

# Add a D scale
rl.addDscale(btmrule=0)   # indicates this scale is put on the bottom rule
                          # 0 pixels down from the top of the bottom rule

filename = "twoxthree.svg"

rl.write(filename)

print(f'{filename} created')

This would produce:

This package is intended to produce images useful for documents or web sites which illustrate logarithms or Slide Rules. One such web site is available at:

https://bernie-skipole.github.io/sliderule/

The package has one class, Rule, which is illustrated above and has the methods:

write(filename) This saves the image file.

addDscale(btmrule=-1, midrule=-1, toprule=-1)

addCscale(btmrule=-1, midrule=-1, toprule=-1)

addCFscale(btmrule=-1, midrule=-1, toprule=-1)

addDFscale(btmrule=-1, midrule=-1, toprule=-1)

addLL3scale(btmrule=-1, midrule=-1, toprule=-1)

addLL2scale(btmrule=-1, midrule=-1, toprule=-1)

Only one of the arguments btmrule, midrule or toprule should be given a non -1 argument which indicates which rule the scale should appear on, and the integer number of pixels down from the top of that rule.