![]() I do know that Inkscape and AI are not the greatest tools for pattern making and grading. I don't know how Adobe Illustrator tests out. I also don't know if this will be true in the next release (0.91). I don't know if this is a bug specific to Inkscape (0.48) or my hardware. If I make adjustments, I have to take into account what I see on the screen and what Inkscape reports back to me. As a user, until I print something out, I have no idea if the drawing will measure as expected. But it is a big deal when creating a precise drawing. Not a big deal if creating a drawing for the web or a poster. Clicking off the square and then reselecting it shows that the square now measures 2.011 x 2.011 inches. I drew a square and entered in the exact dimensions for width and height of 2.000. First, I'll show you the printed results. I took some time to test Inkscape with my current display and printer. Are the lines cleanly and clearly defined? Does your square measure as expected? Do you have to measure to the outside or inside of the line to achieve the desired measurement? Be sure to look at the print quality and width of your lines. The best way to test your current setup is to draw a square in your program, such as 1 inch x 1 inch. Your display, drawing, and printer all play a factor in the accuracy of the measurements used. There are a lot of variables that we have to contend with. Inkscape is not entirely at fault, though the developers have worked on improving this in the up coming release. The measurements of the printed drawing were always a little off. I've created precise drawings where I've entered the dimensions and printed them. I've noticed with Inkscape a tendency for a certain fuzziness. These software programs do work - to a point. In fact, you can take classes on the subject from various sources. There is an increasing trend among indie pattern makers in the use of Inkscape and Adobe Illustrator for pattern making. There is one reason to bring this topic up, as complex and boring as it may be. Of course, Inkscape and AI are used in an environment in which the vector drawing is displayed via Pixels. Inkscape and AI can now do things that were exclusively in the domain of Photoshop, and yet store the drawing as a vector drawing. The differences have begun to blur in the last few years. Both pieces of software have their advantages for different uses. Lines are fuzzy because they are built of individual pixels. You cannot scale images up, only down, because the computer cannot fill in the holes. Programs like Gimp and Photoshop are raster-based drawing programs, programs that allow you to manipulate individual pixels. Vector drawing programs are known for their precision, accuracy, and scalability. This means that drawing lines and objects are stored on the computer as mathematical equations. Inkscape and Adobe Illustrator are vector drawing programs. Generally speaking, what a user sees on screen is what they want to get in print. The whole discussion about pixel sizes and resolutions, gets rather complicated. We can fit more pixels into that one inch than was ever thought possible. We have far superior displays on our desktops then those early developers did. Over the years pixel sizes, and screen resolutions, have changed. LCD pixels are manufactured in a two-dimensional grid, and are often represented using dots or squares, but CRT pixels correspond to their timing mechanisms and sweep rates. The address of a pixel corresponds to its physicalĬoordinates. So it is the smallest controllable element of a picture represented on ![]() In digital imaging, a pixel, pel, or picture element is a physical point in a raster image, or the smallest addressable element in an all points addressable display device In order for that to happen, a definition had to be created to tell the computer how many pixels were equivalent to one inch. In other words if you drew a box that was 1 inch square, you would want to see that displayed on the screen. In the early days of graphical drawing it was assumed the user would want to see their drawing full scale. The concern was centered around units and how they are used in Inkscape. Last September I began to follow a discussion on pixels in the Inkscape Developer's mailing list. ![]()
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