// create new mesh with desired maximum number of points
PathMesh mesh = new PathMesh( 500 );

// StrokePoints are defined by an x,y position and a width
StrokePoint point = new StrokePoint( x, y, width );

// add points when you want to
mesh.addPoint( point );

// when you render, it will re-evaluate the point list
// if new points were added since previous render call
mesh.render( shader, GL_TRIANGLES );