More user friendly. Instructions and so on ^^
Justyna Ilczuk
parent
b2a9cc3983
commit
a0b673afc1
152
rutherford.py
152
rutherford.py
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@ -1,5 +1,5 @@
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from __future__ import division
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from math import sqrt, ceil
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from math import sqrt, ceil, atan, sin, cos
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import random, pygame, sys
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import os
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import json
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@ -15,57 +15,68 @@ BLUE = (30, 30, 180)
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VERYLIGHT = (210, 210, 210)
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BLACK = (0,0,0)
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WHITE = (255, 255, 255)
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GRAYISH = (210, 210, 255)
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TIME_STEP = 0.01
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K = 10000
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K = 50000
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X_SCREEN_BORDER = 1200
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Y_SCREEN_BORDER = 800
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INITIAL_SPEED_X = 50
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INITIAL_SPEED_X = 200
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INITIAL_SPEED_Y = 0
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INITIAL_Y = 400
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DEFAULT_OLD_X = 2 - INITIAL_SPEED_X*TIME_STEP
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DEFAULT_OLD_Y = INITIAL_Y - INITIAL_SPEED_Y*TIME_STEP
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BEAM_WIDHT = 20
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def main():
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#create the screen
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window = pygame.display.set_mode((1200, 800))
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colors = [GRAY, VIOLET, RED, GREEN, BLUE, VERYLIGHT, BLACK]
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global INITIAL_SPEED_X
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global INITIAL_SPEED_Y
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global INITIAL_Y
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settings = SimulationSettings(K, TIME_STEP, INITIAL_Y, INITIAL_SPEED_X, BEAM_WIDHT, colors)
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#Initialize universe with some atoms
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atom1 = Particle(1000, Vector2(500,500), Vector2(500,500), 20, BLUE)
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atom2 = Particle(1, Vector2(2,400), Vector2(2-TIME_STEP*INITIAL_SPEED_X, INITIAL_Y- TIME_STEP*INITIAL_SPEED_Y), 1, RED)
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universe = Universe([atom1, atom2])
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universe = Universe(settings)
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screen = Screen(window, colors, universe)
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screen.draw_surface()
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keep_running = True
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simulation_running = True
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while keep_running:
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screen.draw_surface()
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universe.update_positions()
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if(simulation_running):
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screen.draw_surface()
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universe.update_positions()
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else:
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screen.draw_static_surface()
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for event in pygame.event.get():
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if event.type == pygame.QUIT:
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keep_running = False
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elif event.type == pygame.KEYUP:
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if event.key == K_UP :
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INITIAL_Y -= 10
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universe.settings.initial_y -= 10
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elif event.key == K_DOWN:
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INITIAL_Y += 10
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universe.settings.initial_y += 10
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elif event.key == K_RIGHT:
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INITIAL_SPEED_X += 20
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universe.settings.speed_x += 20
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elif event.key == K_LEFT:
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INITIAL_SPEED_X -= 20
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if(INITIAL_SPEED_X < 0):
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INITIAL_SPEED_X = 0
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universe.settings.speed_x -= 20
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if(universe.settings.speed_x < 0):
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universe.settings.speed_x = 0
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elif event.key == K_SPACE:
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universe.add_particle(Particle(1, Vector2(2,INITIAL_Y),
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Vector2(2-TIME_STEP*INITIAL_SPEED_X, INITIAL_Y- TIME_STEP*INITIAL_SPEED_Y),
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1, random.choice(colors)))
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universe.add_particle()
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elif event.key == K_h:
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if(universe.settings.show_instructions):
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universe.settings.show_instructions = False
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else:
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universe.settings.show_instructions = True
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elif event.key == K_RETURN:
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if(simulation_running):
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simulation_running = False
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else:
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simulation_running = True
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print "Pygame thread exited."
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@ -89,18 +100,71 @@ class Screen:
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for particle in self.universe.particles:
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self.draw_particle(particle)
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def draw_static_universe(self):
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self.draw_guide()
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for particle in self.universe.particles:
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self.draw_particle(particle)
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for x in range(1, len(self.universe.particles)):
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self.draw_particle_vector(self.universe.particles[x])
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def draw_particle(self, particle):
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position = (int(ceil(particle.position.x)), int(ceil(particle.position.y)))
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pygame.draw.circle(self.window, particle.color, position, 6+ int(particle.mass/100) )
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def draw_particle_vector(self, particle):
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factor = 20
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arrow_head_x = 0.50
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arrow_head_y = 0.30
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start_position = (particle.position.x, particle.position.y)
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end_position = (int((particle.position.x - particle.old_position.x)*factor +particle.position.x),
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int((particle.position.y -particle.old_position.y)*factor + particle.position.y))
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pygame.draw.aaline(self.window, BLUE, start_position, end_position, 4)
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pygame.draw.circle(self.window, RED, end_position, 2)
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def draw_guide(self):
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pygame.draw.line(self.window, BLACK, (0, INITIAL_Y), (X_SCREEN_BORDER,INITIAL_Y), 2)
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y = self.universe.settings.initial_y
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for x in range(0, 39, 2):
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pygame.draw.aaline(self.window, BLACK, (X_SCREEN_BORDER*x/40, y), (X_SCREEN_BORDER*(x+1)/40, y), 4)
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def draw_static_surface(self):
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self.window.fill(GRAYISH)
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self.draw_static_universe()
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description_of_simulation_settings = self.prepare_settings_description(self.universe.settings)
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for i, text in enumerate(self.communicates + description_of_simulation_settings):
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self.print_text(text, 20, 20 + i*20, (0, 0, 0), 24, self.window)
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if(self.universe.settings.show_instructions):
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for i, text in enumerate(self.universe.settings.instructions):
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self.print_text(text, 350, 20 + i*20, (0, 0, 0), 24, self.window)
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pygame.display.flip()
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def prepare_settings_description(self, settings):
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description = []
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line = "K = {0:d}".format(settings.K)
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description.append(line)
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line = "Position of the beam is {0:d}".format(settings.initial_y)
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description.append(line)
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line = "Initial speed of the beam is {0:d}".format(settings.speed_x)
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description.append(line)
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line = "Width of the beam is {0:d}".format(settings.beam_width)
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description.append(line)
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line = "Time step is set to {0:f}".format(settings.time_step)
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description.append(line)
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line = "Press H to show/hide instructions"
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description.append(line)
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return description
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def draw_surface(self):
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self.window.fill(self.color)
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self.draw_universe()
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for i, text in enumerate(self.communicates):
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self.print_text(text, 20, 20 + i*20, (0, 0, 0), 30, self.window)
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description_of_simulation_settings = self.prepare_settings_description(self.universe.settings)
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for i, text in enumerate(self.communicates + description_of_simulation_settings):
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self.print_text(text, 20, 20 + i*20, (0, 0, 0), 24, self.window)
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if(self.universe.settings.show_instructions):
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for i, text in enumerate(self.universe.settings.instructions):
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self.print_text(text, 350, 20 + i*20, (0, 0, 0), 24, self.window)
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pygame.display.flip()
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def print_text(self, text,xx,yy,color,text_size, screen):
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@ -125,10 +189,30 @@ class Particle:
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self.color = color
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self.charge = charge
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class SimulationSettings:
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def __init__(self, K, time_step, initial_y, speed_x, beam_width, colors):
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self.K = K
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self.time_step = time_step
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self.initial_y = initial_y
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self.speed_x = speed_x
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self.beam_width = beam_width
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self.colors = colors
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self.show_instructions = True
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self.instructions = [ "Instructions:",
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"To change speed, use right and left arrow keys",
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"To change position of the beam, use up and down arrow keys",
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"To add particle, press space",
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"To stop/restart simulation, press enter"]
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class Universe:
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def __init__(self, particles):
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self.particles = particles
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def __init__(self, settings):
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self.settings = settings
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atom1 = Particle(1000, Vector2(500,500), Vector2(500,500), 20, BLUE)
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atom2 = Particle(1, Vector2(2,400), Vector2(2-TIME_STEP*INITIAL_SPEED_X,
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INITIAL_Y- TIME_STEP*INITIAL_SPEED_Y), 1, RED)
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self.particles = [atom1, atom2]
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print("Universe has just been created!")
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def update_accelerations(self):
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@ -154,11 +238,13 @@ class Universe:
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def limit_position(self, particle):
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if(particle.position.x > X_SCREEN_BORDER or particle.position.y > Y_SCREEN_BORDER or
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particle.position.x < 0 or particle.position.y < 0):
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random_offset = random.randrange(-20, 20)
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y = self.settings.initial_y
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speed = self.settings.speed_x
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random_offset = random.randrange(-self.settings.beam_width, self.settings.beam_width)
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particle.position.x = 2
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particle.old_position.x = 2 - INITIAL_SPEED_X*TIME_STEP
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particle.position.y = INITIAL_Y + random_offset
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particle.old_position.y = INITIAL_Y - INITIAL_SPEED_Y*TIME_STEP + random_offset
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particle.old_position.x = 2 - speed*self.settings.time_step
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particle.position.y = y + random_offset
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particle.old_position.y = y + random_offset
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return particle
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def compute_acc(self, particle1, particle2):
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@ -172,7 +258,13 @@ class Universe:
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acc2y = -force/particle2.mass*vertical_distance/distance
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return [Vector2(acc1x, acc1y), Vector2(acc2x, acc2y)]
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def add_particle(self, particle):
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def add_particle(self):
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y = self.settings.initial_y
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speed = self.settings.speed_x
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colors = self.settings.colors
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random_offset = random.randrange(-self.settings.beam_width, self.settings.beam_width)
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particle = Particle(1, Vector2(2, y + random_offset),
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Vector2(2-self.settings.time_step*speed, y + random_offset), 1, random.choice(colors))
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self.particles.append(particle)
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