def part_a( self ):
'''
a) ideal trajectory: no drag (C=0) and no spin (-> Magnus force = 0) [2 points]
'''
initial_velocity = self.initial_velocity
dimpled = False
spin = 0
def C( v, dimpled ):
return 0
for initial_angle in self.initial_angles_degrees:
part_a_ball = Golf( initial_velocity, initial_angle, C, dimpled, spin )
part_a_ball.display_plot()
for filetype in self.filetypes:
part_a_ball.save_plot( filetype )
file_directory = "/home/res/Documents/duke/2012S/PHY260/homeworks/homework3/"
# TODO: edit the following line, implement differently when processing data for different parts of the assignment.
file_name_base = "PHY260_Grisaitis_homework3_"
file_type_extensions = ['png']
initial_angles_degrees = ( 9, 15, 30, 45 )
initial_speed = 70
dt = 0.01
# This array contains the parameters specific to each part of the problem.
question_parameters = [ \
['A', 0.0, False, False, 'Ideal'], \
['B', 0.5, False, False, 'With air resistance'], \
['C', 0.5, True, False, 'With air resistance and dimples'], \
['D', 0.5, True, True, 'With air resistance, dimples, and spin']]
for ( part, C, dimpled, spin, info ) in question_parameters:
# initialize a model object for each part of the problem
golf_ball = Golf( initial_angles_degrees, initial_speed, C, dimpled, spin )
golf_ball.solve_with_Euler( dt )
file_name_base = "PHY260_Grisaitis_homework3_" + part
# plot the model and save results to file
golf_ball.plot_and_save_models( \
file_directory = file_directory, \
file_name_base = file_name_base, \
file_types = file_type_extensions, \
info_text = ( ( 'Part %s:' % part ) + info ) \
)