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Circle.java
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/
Circle.java
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// KicadModuleToGEDA - a utility for turning kicad modules to gEDA PCB footprints
// Circle.java v1.0
// Copyright (C) 2015 Erich S. Heinzle, a1039181@gmail.com
// see LICENSE-gpl-v2.txt for software license
// see README.txt
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
//
// KicadModuleToGEDA Copyright (C) 2015 Erich S. Heinzle a1039181@gmail.com
/**
*
* This class is passed a Kicad Draw Circle string of the
* form "DC Xcentre Ycentre Xpoint Ypoint width layer"
* and implements a method which can generate a gEDA LineElement definition for a gEDA PCB footprint
*
* @param long xOffset the X offset of the Draw Segment relative to the module origin
* @param long yOffset the Y offset of the Draw Segment relative to the module origin
* @param float magnificationRatio the magnification applied to position and dimensions, default is 1.0
*
* @return String = "ElementArc[x y width height startangle deltaangle thickness]"
*
*/
import java.math.*;
public class Circle extends FootprintElementArchetype
{
String output = "";
long gEDAxCoord = 0;
long gEDAyCoord = 0;
long xCoordNm = 0;
long yCoordNm = 0;
long xPointNm = 0;
long yPointNm = 0;
long gEDAstartAngle = 0; // gEDA uses -ve X axis as origin for rotation CW
long gEDAdeltaAngle = 360; // Kicad uses +ve X axis as origin for rotation CCW, I think
double radiusNm = 0;
long widthNm = 0;
long heightNm = 0;
long gEDAheight = 0;
long gEDAwidth = 0;
long gEDAradius = 0;
long lineThicknessNm = 254000; // this is 10 mil in nanometres
long gEDAlineThickness = 1000; // this is 10 mil in 0.1 mil units
String kicadCircleDescriptor = "";
public void Circle()
{
output = "#Hmm, the no arg KicadDrawingCircle constructor didn't do much";
}
public String toString()
{
return kicadCircleDescriptor;
}
public void populateElement(String arg, boolean metric)
{
float parsedValue = 0;
kicadCircleDescriptor = arg;
String[] tokens = arg.split(" ");
// System.out.print("#The passed string:" + arg + "\n");
if (tokens[0].startsWith("DC"))
{
parsedValue = Float.parseFloat(tokens[1]);
xCoordNm = convertToNanometres(parsedValue, metric);
parsedValue = Float.parseFloat(tokens[2]);
yCoordNm = convertToNanometres(parsedValue, metric);
parsedValue = Float.parseFloat(tokens[3]);
xPointNm = convertToNanometres(parsedValue, metric);
parsedValue = Float.parseFloat(tokens[4]);
yPointNm = convertToNanometres(parsedValue, metric);
parsedValue = Float.parseFloat(tokens[5]);
lineThicknessNm = convertToNanometres(parsedValue, metric);
}
else if (tokens[0].startsWith("fp_circle"))
{
metric = true;
parsedValue = Float.parseFloat(tokens[2]);
xCoordNm = convertToNanometres(parsedValue, metric);
parsedValue = Float.parseFloat(tokens[3]);
yCoordNm = convertToNanometres(parsedValue, metric);
parsedValue = Float.parseFloat(tokens[5]);
xPointNm = convertToNanometres(parsedValue, metric);
parsedValue = Float.parseFloat(tokens[6]);
yPointNm = convertToNanometres(parsedValue, metric);
if (tokens[9].startsWith("width")) {
parsedValue = Float.parseFloat(tokens[10]);
lineThicknessNm = convertToNanometres(parsedValue, metric);
}
}
else
{
output = "Hmm, a Draw Circle string was not passed to the object";
}
}
public String generateGEDAelement(long xOffsetNm, long yOffsetNm, float magnificationRatio)
// offsets in nm, magnificationRatio a float, default 1.0
{
// we take care of magnification here
// this allows a family of footprint silkscreens graphics to
// be generated fairly easily, for example different sized 7
// or 17 segment LED displays
// Device outlines may need to be hand tweaked, as some
// device families share the same outline, despite different sized
// features across the family of device, i.e. 0.5 inch and
// 0.8 inch LED displays have the same outline silkscreen
// which doesn't need to be magnified
// we calculate the radius in nanometres
// and then apply the magnification ratio
radiusNm = magnificationRatio*Math.sqrt(((xCoordNm - xPointNm)*(xCoordNm - xPointNm)) + ((yCoordNm - yPointNm)*(yCoordNm - yPointNm)));
// System.out.println("X, Y, Xp, Yp: " + xCoord + " " + yCoord + " " + xPoint + " " + yPoint);
// System.out.println("radius: " + radius );
// we then convert the radius to decimils
gEDAradius = Math.round(radiusNm / 254); // 254 nm per 0.01 mil unit used by gEDA
// System.out.println("gEDAradius = radius * 10: " + gEDAradius );
gEDAxCoord = (long)((xCoordNm + xOffsetNm)*magnificationRatio/254);
// divide nm by 254 to produce
gEDAyCoord = (long)((yCoordNm + yOffsetNm)*magnificationRatio/254);
// 0.01 mil units
gEDAlineThickness = (lineThicknessNm / 254); // 254 nm per 0.01 mil unit used by gEDA
output = "ElementArc[" +
gEDAxCoord + " " +
gEDAyCoord + " " +
gEDAradius + " " + // for a circle, radius can be used for width
gEDAradius + " " + // and height definitions in gEDA, as they are equal
gEDAstartAngle + " " +
gEDAdeltaAngle + " " +
gEDAlineThickness + "]\n";
return output;
}
private long convertToNanometres(float rawValue, boolean metricSystem)
{
if (metricSystem) // metricSystem = units mm
{
return (long)(1000000 * rawValue);
// multiply mm by 1000000 to turn into nm
}
else
{
return (long)(2540 * rawValue);
// multiply 0.1 mil units by 2540 to turn into nm
}
}
}