def move_camera(camera, camera_control, origin, amount = None):
location = camera['location']
line_of_sight = camera['line_of_sight']
parallel = camera['parallel']
if camera_control in ['backward', 'forward']:
if amount is None:
amount = 0.25
if camera_control == 'forward':
location = [location[i] + amount * line_of_sight[i] for i in range(len(location))]
elif camera_control == 'backward':
location = [location[i] - amount * line_of_sight[i] for i in range(len(location))]
camera['location'] = location
return camera
if amount is None:
amount = 2.0 * math.pi / 100.0
if camera_control == 'up':
rot = matrix.rotv(parallel, -amount)
elif camera_control == 'down':
rot = matrix.rotv(parallel, amount)
elif camera_control == 'left':
rot = matrix.rotv(matrix.cross(parallel, line_of_sight), -amount)
elif camera_control == 'right':
rot = matrix.rotv(matrix.cross(parallel, line_of_sight), amount)
line_of_sight = rot.operate(line_of_sight, origin = [0., 0., 0.])
parallel = rot.operate(parallel, origin = [0., 0., 0.])
location = rot.operate(location, origin = origin)
camera = {'location': location, 'line_of_sight': line_of_sight, 'parallel': parallel}
return camera
def camera_transform(location, line_of_sight, parallel, deltaz, point): r = [point[i] - location[i] for i in range(len(point))] dist_to_cam = matrix.dot(r, line_of_sight) horiz_coord = deltaz * matrix.dot(r, parallel) / dist_to_cam z = matrix.cross(parallel, line_of_sight) vert_coord = deltaz * matrix.dot(r, matrix.cross(line_of_sight, parallel)) / dist_to_cam return [horiz_coord, vert_coord]