Here is how I use Inkscape to achieve precise measurements.
The following conversions are global definitions at the top of my Python scripts:
*# measurement constants in_to_px = ( 90 / 1 ) #convert inches to pixels - 90px/in cm_to_in = ( 1 / 2.5 ) #convert centimeters to inches - 1in/2.5cm cm_to_px = ( 90 / 2.5 ) #convert centimeters to pixels
in_to_pt = ( 72.72 / 1 ) #convert inches to printer's points - 72.72pt = 1in cm_to_pt = ( 72.72 / 2.5 ) #convert centimeters to printer's points border = ( 3 * in_to_pt) # 3" document borders * The client measurement data from the Inkscape extension is converted to printer's points. ('self.options' is how the Python script understands the input fields from the .inx extension file)
* # if customer's data is in centimeters ** if ( self.options.measureunit == 'cm'): conversion = cm_to_pt else: conversion = in_to_pt
height = self.options.height * conversion ** chest = self.options.chest * conversion chest_length = self.options.chest_length * conversion waist = self.options.waist * conversion back_waist_length = self.options.back_waist_length * conversion back_jacket_length = self.options.back_jacket_length * conversion back_shoulder_width = self.options.back_shoulder_width * conversion back_shoulder_length = self.options.back_shoulder_length * conversion back_underarm_width = self.options.back_underarm_width * conversion back_underarm_length = self.options.back_underarm_length * conversion back_waist_to_hip_length = self.options.back_waist_to_hip_length * conversion nape_to_vneck = self.options.nape_to_vneck * conversion sleeve_length = self.options.sleeve_length * conversion
neck_width = (chest/16) + (2*cm_to_pt) ** ****# **19th century patterns are very strange...*
At the end of the script, the document is resized to the drawing, adding borders. The current script expects a maximum of 36" wide paper. It's possible to print to 8.5 x 11 letter paper and tape it together.
Inkscape displays a small part of the lower left document corner because this is a man-sized coat, but manual zoom is done with 'view/zoom/page' - no problem.
Save to .pdf regardless of zoom level, then send to the 36" wide printer.
- Susan * *
On 11-01-12 02:10 AM, Susan Spencer wrote:
Here is how I use Inkscape to achieve precise measurements.
The following conversions are global definitions at the top of my Python scripts:
*# measurement constants in_to_px = ( 90 / 1 ) #convert inches to pixels - 90px/in cm_to_in = ( 1 / 2.5 ) #convert centimeters to inches -
Conversion is not the problem. The problem is that the number of pixels per inch keeps changing. It's currently 90, schedule to change to 96, and may change again. That means that old SVGs will become 7% smaller when the new scale is implemented. And that's *all* the old ones since Inkscape stores their measurements as pixels.
BTW, it's 2.54 cm per inch. :)
On Wed, Jan 12, 2011 at 01:10:25AM -0600, Susan Spencer wrote:
Here is how I use Inkscape to achieve precise measurements.
The following conversions are global definitions at the top of my Python scripts:
*# measurement constants in_to_px = ( 90 / 1 ) #convert inches to pixels - 90px/in cm_to_in = ( 1 / 2.5 ) #convert centimeters to inches -
Just thought you should know: an inch is 2.54 cm, not 2.5 cm.
-- hendrik
participants (3)
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Hendrik Boom -
Shawn H Corey -
Susan Spencer