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frames.py
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frames.py
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import numpy as np
max_num = 42371000 * 4/3 # (radio_tierra + radio geo) * 4/3
def world_to_camera_coordinates(world_coordinates, camera_origin):
return world_coordinates - camera_origin
def camera_to_world_coordinates(camera_coord, camera_origin):
return camera_coord + camera_origin
def screen_to_camera_coordinates(screen_coordinates, width: int, height: int):
x = screen_coordinates[0]
y = screen_coordinates[1]
camera_x = x / width * 2*max_num - max_num
camera_y = y / height * 2*max_num - max_num
return [camera_x, camera_y]
def camera_to_screen_coordinates(world_coordinates, width: int, height: int) -> list:
""" Can be used as camera to screen coordinates too (I think)"""
min_num = -max_num
norm_coord = (world_coordinates - min_num) / (max_num - min_num) # [0, 1]
screen_coordinates = [round(norm_coord[0] * width), round(norm_coord[1] * height)] # [0, width]
return screen_coordinates
def screen_to_world_coordinates(screen_coordinates, width: int, height: int) -> list:
x = screen_coordinates[0]
y = screen_coordinates[1]
world_x = x / width * 2*max_num - max_num
world_y = y / height * 2*max_num - max_num
return [world_x, world_y]
def screen_to_world_vector(screen_vector, width, height):
transformation_matrix = np.array(
[max_num/width, 0],
[0, max_num/height]
)
return screen_vector * transformation_matrix
def world_to_screen_vector(world_vector, width, height):
transformation_matrix = np.array(
[width/max_num, 0],
[0, height/max_num]
)
return world_vector * transformation_matrix
def world_to_screen_coordinates(world_coordinates, settings):
camera_coord = world_to_camera_coordinates(world_coordinates, settings.camera_origin)
screen_coord = camera_to_screen_coordinates(camera_coord, settings.width, settings.height)
return screen_coord