library forces coordinates to be millimeters about vectorgraphics2d HOT 3 OPEN

It's always nice to hear feedback from the users, thanks!
That's correct, VG2D enforces millimeters as units and there is clearly a need to specify measurements in other units.

I think this is closely related to the missing support for setting the DPI (or PPI) of a document (see issue #16). Currently, the pixel density is a constant value, which makes it difficult if you want to specify the size in pixels for example. If DPI can be adjusted, the VectorGraphics2D API could offer different means to set the size. From my current point of view, this approach would be preferable over multiple VG2D implementations. I cannot make any promises on when we will get around to implementing it, though. Sorry :/

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I fixed it by scaling the graphics as shown below. The output PDF then had size in inches assuming pixels in java were 72 DPI (a hard coded number). On MacOS 10.8 with Java 6, this caused some setClip errors failing to validate rectangle, but I could not detect any consequences of those errors. On MacOS 10.11 (El Capitan) and Java 8, those errors went away (although now every time I open a PDF file in Adobe, it complains of problem with bounding box for 'Lucinda Grande" font even though I never use that font? Opening in Apple's Preview does not complain?)

Here is code snippet to create scaled PDF:

Dimension psize = plot2DView.getSize();
double scale = 25.4/72.;
double pwidth = scale*psize.width;
double pheight = scale*psize.height;
PDFGraphics2D g = new PDFGraphics2D(0.0, 0.0, pwidth, pheight);
AffineTransform savedState=g.getTransform();
g.scale(scale, scale);
plot2DView.paintComponent(g);
g.setTransform(savedState);

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Thanks a lot for sharing your code @nairnj. That's definitely the workaround until a solution for issue #16 can be implemented.

Please, open new issues for the errors you mentioned, so we can solve them quickly.

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