How to draw a line in LibGDX?

Draw a line in LibGdx that passes for a certain point

• In LibGdx there's a really easy way to draw shapes, currently I'm drawing lines like this: shapeRenderer.begin(ShapeType.Line); shapeRenderer.line(x1, y1, x2, y2); shapeRenderer.end(); There's a defined starting and final point, let's call them point 1 and point 2, respectively. I need to draw a line that starts in point 1, pass point 2 and continues in the same direction, like this: Any ideas how can this be done?

• Answer:

  Let's say you have two vectors representing your two points: Vector2 p1 = new Vector2(x1, y1); Vector2 p2 = new Vector2(x2, y2); Then what you want to do can be achieved by simply doing that: Vector2 p3 = new Vector2(p2).sub(p1).add(p2); shapeRenderer.line(p2.x, p2.y, p3.x, p3.y); You can change the distance between p2 and p3 by using the scl() method when computing p3: Vector2 p3 = new Vector2(p2).sub(p1).scl(0.5f).add(p2); For example if you use scl(1f) or don't use it at all like in the previous code snippet, distance between p2 and p3 will be the same as between p1 and p2. If you call scl(0.5f) length will be divided by 2, etc.