Toxiclibs: storing Polygon2D objects as PDF or SVG

krautsour..

Toxiclibs: storing Polygon2D objects as PDF or SVG

in Contributed Library Questions • 2 years ago

Hi all,

I'm drawing some voronoi fractures using Polygon2D objects, and it works fine. However, storing them to PDF does not, they are just not drawn at all. If however I translate them to vertex() shapes, they do get drawn, but it's not as nice and clean as with the Polygon2D objects. I was wondering whether there was a way to save these to PDF, or ideally even to SVG?

Cheers

Michael

Replies(4)

toxmeister

Re: Toxiclibs: storing Polygon2D objects as PDF or SVG

2 years ago

Sorry for the delay... You can use the ToxiclibsSupport class also for PDF export, but you will need to wire both of them correctly. To avoid the extra level of indirection, this helper class is always directly bound to only a SINGLE instance of PGraphics and not to the PApplet (which is used for managing recording classes...) So if you want to impact the PDF export, you'll need to do something like this:

import processing.pdf.*;
import toxi.geom.*;
import toxi.processing.*;
boolean doSavePDF = true;
void setup() {
size(400,400);
}
void draw() {
// setup gfx to use applet's default PGraphics renderer
ToxiclibsSupport gfx=new ToxiclibsSupport(this);
if (doSavePDF) {
// ...or assign PDF instance to gfx helper
PGraphics pdf=beginRecord(PDF, "foo.pdf");
gfx.setGraphics(pdf);
}
gfx.polygon2D(new Circle(new Vec2D(200,200),100).toPolygon2D(6));
if (doSavePDF) {
endRecord();
doSavePDF=false;
}
}

http://postspectacular.com | http://toxiclibs.org

almost_sc..

Re: Re: Toxiclibs: storing Polygon2D objects as PDF or SVG

1 year ago

HI --

Using this method, how can one resize the resulting PDF. I tried using the setSize method but it does not seem to change the size of the actual PDF.

void writePDF() {
PGraphics pdf=beginRecord(PDF, "out.pdf");
pdf.setSize(100,100);
gfx.setGraphics(pdf);
List<FlatFace> flatFaces = new ArrayList<FlatFace>();
for (Edge e : graph.getEdges()) {
Line2D thisLine = new Line2D(e.a, e.b);
float lineLength = thisLine.getLength();
flatFaces.add(new FlatFace(lineLength) );
}
Vec2D cen= new Vec2D(pdf.width/4, pdf.height/4);
pdf.pushMatrix();
gfx.translate(cen);
gfx.polygon2D(flatFaces.get(0).flatFace);
Vec2D o = new Vec2D(0, 0);
gfx.circle(o, 12);
for (VertexJoint vj : vertexJoints) {
pdf.pushMatrix();
gfx.translate(vj.V.v.copy().invert());
gfx.polygon2D(vj.outter);
pdf.popMatrix();
}
pdf.popMatrix();
endRecord();
gfx.setGraphics(g);
}

toxmeister

Re: Toxiclibs: storing Polygon2D objects as PDF or SVG

1 year ago

I might be mistaken, but IMHO that's a shortcoming of P5. The size used is the one given by size() in setup()...

If you want to specify a physical size you can use the UnitTranslator in the toxi.math.conversion package:

import toxi.math.conversion.*;
void setup() {
// setup window for A4 portrait format
int w=UnitTranslator.millisToPoints(210);
int h=UnitTranslator.millisToPoints(297);
size(w,h);
}

Hth!

almost_sc..

Re: Toxiclibs: storing Polygon2D objects as PDF or SVG

1 year ago

Thanks for the reply!

Let me be a bit more clear. I'm trying to draw to a PDF offscreen without effecting what is drawn onscreen. I want to change the size of the pdf I'm drawing to.

I create a PGraphics object using some code from your original reply, but I can't seem to figure out out to change the size of the PDF this creates

PGraphics pdf=beginRecord(PDF, "out.pdf");

I've never created a PGraphics with beginRecord (and I'm not 100% sure I know how this is working). Usually I use create graphic:

PGraphics pdf = createGraphics(300, 300, PDF, "output.pdf");

and then call beginRecord with no args, but I cant seem to get this way of creating the PGraphics to work with the ToxiclibsSupport class.

So, when I create the PGraphics using beginRecord, how do I specify the size?

Thanks!

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