Custom draw line

func _draw():
    var minX = floor(min(start.x, end.x))
    var maxX = floor(max(start.x, end.x))
    var minY = floor(min(start.y, end.y))
    var maxY = floor(max(start.y, end.y))
    var width = maxX - minX
    var height = maxY - minY
    for y in range(height): #might need adjustments for first or last pixel
        var x = floor((y/height) * width)   #x offset
        #didn't find draw_point so this is a workaround
        var point = Vector2(minX + x, minY + y)
        draw_line(point, point+Vector2.RIGHT, Color.white)