Method offScreenYD

ij/src/main/java/ij/gui/Roi.java:2487–2493

Converts image canvas screen y coordinates to floating-point offscreen image pixel coordinates, depending on whether this roi uses the line or area convention for coordinates.

(int sy)

	 *  coordinates, depending on whether this roi uses the line or area convention
	 *  for coordinates. */
	protected double offScreenYD(int sy) {
		if (ic == null) return sy;
		double offScreenValue = ic.offScreenYD(sy);
		if (useLineSubpixelConvention())
			offScreenValue -= 0.5;
		return offScreenValue;
	}

	/** Returns 'true' if this ROI uses for drawing the convention for
	 *  line and point ROIs, where the coordinates are with respect