point

I have line segment defined by two points A(x1,y1,z1) and B(x2,y2,z2) and point p(x,y,z). How can I check if the point lays on the line segment? Rob Agar If the point is on the line then: (x - x1) / (x2 - x1) = (y - y1) / (y2 - y1) = (z - z1) / (z2 - z1) Calculate all three values, and if they are the same (to some degree of tolerance), your point is on the line. To test if the point is in the segment, not just on the line, you can check that x1 < x < x2, assuming x1 < x2, or y1 < y < y2, assuming y1 < y2, or z1 < z < z2, assuming z1 < z2 Find the distance of point P from both the line end

I need to calculate the angle in degrees between two points for my own Point class, Point a shall be the center point. Method: public float getAngle(Point target) { return (float) Math.toDegrees(Math.atan2(target.x - x, target.y - y)); } Test 1: // returns 45 Point a = new Point(0, 0); System.out.println(a.getAngle(new Point(1, 1))); Test 2: // returns -90, expected: 270 Point a = new Point(0, 0); System.out.println(a.getAngle(new Point(-1, 0))); How can i convert the returned result into a number between 0 and 359? you could add the following: public float getAngle(Point target) { float angle