class Camera(object):
_screen_size = None
_screen_centre_x = None
_screen_centre_y = None
_calc_pos = None
_screen_bounds = None
def __init__(self, x_size, y_size, scale=30):
self.pos = PixelCoord(0, 0, scale)
self.screen_size = x_size, y_size
@property
def screen_size(self):
return self._screen_size
@screen_size.setter
def screen_size(self, value):
x_size, y_size = value
self._screen_size = x_size, y_size
self._screen_centre_x = x_size / 2
self._screen_centre_y = y_size / 2
@property
def screen_bounds(self):
if self._screen_bounds is None or self._calc_pos != self.pos:
self._calc_pos = self.pos.copy()
screen_width, screen_height = self.screen_size
half_draw_width = (screen_width / 2) + self.pos.scale
half_draw_height = (screen_height / 2) + self.pos.scale
self._screen_bounds = (
0 - half_draw_width,
0 + half_draw_width,
0 - half_draw_height,
0 + half_draw_height,
)
return self._screen_bounds
def get_screen_coord(self, coordinate):
p_coord = coordinate.world.scaled(self.pos.scale)
min_x, max_x, min_y, max_y = self.screen_bounds
offset_coord = p_coord - self.pos
if min_x <= offset_coord.x <= max_x:
if min_y <= offset_coord.y <= max_y:
return offset_coord + PixelCoord(self._screen_centre_x,
self._screen_centre_y,
p_coord.scale)
return None
def __init__(self, x_size, y_size, scale=30):
self.pos = PixelCoord(0, 0, scale)
self.screen_size = x_size, y_size