Hello Enrico,
You might also like to have a look at the very useful JTS
GeometricShapeFactory class. Here is an example based on your
description...
// two reference points
Coordinate c0 = new Coordinate( x0, y0 );
Coordinate c1 = new Coordinate( x1, y1 );
// length of perpendicular dimension
double dist = ...
GeometricShapeFactory shapeFactory = new GeometricShapeFactory();
Coordinate centre = new Coordinate(
c0.x + (c1.x - c0.x) / 2,
c0.y + (c1.y - c0.y) / 2);
shapeFactory.setCentre( centre );
shapeFactory.setWidth( c0.distance( c1 ) );
shapeFactory.setHeight( dist );
double radians = Math.atan2( c1.y - c0.y, c1.x - c0.x );
shapeFactory.setRotation( radians );
Geometry rect = shapeFactory.createRectangle();
Michael
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