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More from stevegallacci
for the dimensional tutorial in journals
Showing how to do a quick number line to figure dimensional details.
Category Artwork (Traditional) / Doodle
Species Unspecified / Any
Size 440 x 401px
File Size 67.4 kB
I use a calculator or a slide rule :)
Divide the two distances to get a ratio, and the use the ratio as a multiplyer/divider to work out the measurement you need.
This can be fun.. i.e. I saw a pair of stilts I was interested in getting the design from. The creator posted a picture of them wearing it but with no measurements.. Nor would they give the measurement or a crucial part.
But they Did tell me how tall they were :) :)
From that I was able to calculate a ratio and get the close approx. values of the various parts plus the height one was raised off the ground with them.
http://www.marcwolf.org/gallery/?aid=5
Enjoy
Divide the two distances to get a ratio, and the use the ratio as a multiplyer/divider to work out the measurement you need.
This can be fun.. i.e. I saw a pair of stilts I was interested in getting the design from. The creator posted a picture of them wearing it but with no measurements.. Nor would they give the measurement or a crucial part.
But they Did tell me how tall they were :) :)
From that I was able to calculate a ratio and get the close approx. values of the various parts plus the height one was raised off the ground with them.
http://www.marcwolf.org/gallery/?aid=5
Enjoy
Don't quite get your process, unless you mean calculating the know B distance against a scale for a ratio, then using that ratio to calculate back other measurements with that scale. Then, yes, I see how that would work. I was just tossing this up as a simple non-mathematical way to find dimensional data.
*Nods* I usually just measure with a ruler on a known value i.e.
Drawing say's 11in Ruler says 3in
Calc the ratio and then work from there.
11in/3in = 3.67 Ratio
Converting from drawing to real = drawing value * 3.67
Converting from real to drawing = real value / 3.67
If you have several measurements on the drawing you can use each one to get a ratio, and then do an average ratio to get the one you can use.
This also works out well where the height and width of the drawing is not to scale. But it's a bit more tricky on diagonals
Marc
Drawing say's 11in Ruler says 3in
Calc the ratio and then work from there.
11in/3in = 3.67 Ratio
Converting from drawing to real = drawing value * 3.67
Converting from real to drawing = real value / 3.67
If you have several measurements on the drawing you can use each one to get a ratio, and then do an average ratio to get the one you can use.
This also works out well where the height and width of the drawing is not to scale. But it's a bit more tricky on diagonals
Marc
I avoid doing math if I can, due to dyscalcula (is that right?) so creating a scale line allows me to get the dimensions more directly without calculation. Then I still have to beat on my calculator to get the final 1/32 scale numbers for the tool work. I brought this all up as a demo for drafting tricks that can simplify work without number-crunching. A set of scales, a straight edge and triangles (or improvised equivelents, just for the 90 degrees projections) and optionally, a pair of dividers, can do the deed very quickly.
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