Method doIrregularSetup

ij/src/main/java/ij/plugin/Slicer.java:576–611

(Roi roi)

	}

	void doIrregularSetup(Roi roi) {
		 n = ((PolygonRoi)roi).getNCoordinates();
		 int[] ix = ((PolygonRoi)roi).getXCoordinates();
		 int[] iy = ((PolygonRoi)roi).getYCoordinates();
		 x = new double[n];
		 y = new double[n];
		 for (int i=0; i<n; i++) {
				x[i] = ix[i];
				y[i] = iy[i];
		 }
		 if (roi.getType()==Roi.FREELINE) {
				// smooth line
				for (int i=1; i<n-1; i++) {
					x[i] = (x[i-1] + x[i] + x[i+1])/3.0+0.5;
					y[i] = (y[i-1] + y[i] + y[i+1])/3.0+0.5;
				}
		 }
		 Rectangle r = roi.getBounds();
		 xbase = r.x;
		 ybase = r.y;
		 length = 0.0;
		 double segmentLength;
		 double xdelta, ydelta;
		 segmentLengths = new double[n];
		 dx = new double[n];
		 dy = new double[n];
		 for (int i=0; i<(n-1); i++) {
				xdelta = x[i+1] - x[i];
				ydelta = y[i+1] - y[i];
				segmentLength = Math.sqrt(xdelta*xdelta+ydelta*ydelta);
				length += segmentLength;
				segmentLengths[i] = segmentLength;
				dx[i] = xdelta;
				dy[i] = ydelta;
		 }
	}

	private float[] getLine(ImageProcessor ip, double x1, double y1, double x2, double y2, float[] data) {
		 double dx = x2-x1;