importClass(Packages.icy.roi.ROI2DPoint)
importClass(Packages.icy.roi.ROI2DLine)
importClass(Packages.icy.roi.ROI2DEllipse)
importClass(Packages.icy.roi.ROI2DRectangle)
importClass(Packages.java.awt.geom.Point2D)

seq = getSequence()
if (seq == null) throw "No sequence opened"

// creates anchor points for the ROIs.
topLeft = new Point2D.Double(100, 100)
bottomRight = new Point2D.Double(200, 200)

// create a point ROI at (100,100)
roiPoint = new ROI2DPoint(topLeft)

// create a line ROI from (100,100) to (200,200)
roiLine = new ROI2DLine(topLeft, bottomRight)

// create an rectangular ROI from (100,100) to (200,200)
roiRect = new ROI2DRectangle(topLeft, bottomRight)

// create an circle ROI from (100,100) to (200,200)
roiEllipse = new ROI2DEllipse(topLeft, bottomRight)

// add the ROI to the sequence
seq.addROI(roiPoint)
seq.addROI(roiLine)
seq.addROI(roiRect)
seq.addROI(roiEllipse)