What is the easiest way to draw line using OpenGL-ES (android)

Question

If I have custom renderer in opengl-es prepared:

public void onDrawFrame(GL10 gl)
{
    gl.glClear(GL10.GL_COLOR_BUFFER_BIT | GL10.GL_DEPTH_BUFFER_BIT);
             


        

Answer 1

Thanks Rodney Lambert for the Line class you´ve provided. However it also would be nice to provide a simpler call in onDrawFrame, something like:

Line vertLine = new Line();
vertLine.SetVerts(-0.5f, 0.5f, 0f, -0.5f, -0.5f, 0f);
vertLine.SetColor(.8f, .8f, 0f, 1.0f);
vertLine.draw(mMVPMatrix);

vertLine.SetVerts(-0.5f, 0.5f, 0f, -0.5f, -0.5f, 0f);

creates definitely a line visible inside the viewport