151 lines
5.5 KiB
Python
151 lines
5.5 KiB
Python
import numpy as np
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import random
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import pygame
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from brain import Neural_Network
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from params import GY, CAR_MAX_SPEED, CAR_MAX_FITNESS, CAR_SIZE, CAR_STEERING_FACTOR, VISION_LENGTH, VISION_SPAN, THROTTLE_POWER, screen
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from trigo import angle_to_vector, get_line_feats, segments_intersection, distance
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IMG = pygame.image.load("car20.png")#.convert()
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class Car(pygame.sprite.Sprite):
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def __init__(self, brain=None):
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pygame.sprite.Sprite.__init__(self)
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self.top_surface = pygame.Surface((CAR_SIZE, CAR_SIZE))
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self.original_image = IMG
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# self.image = pygame.Surface((CAR_SIZE, CAR_SIZE))
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# self.image.fill((0,255,0))
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# self.original_image = self.image
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self.image = self.original_image
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self.rect = self.image.get_rect()
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self.vision_length = VISION_LENGTH # line liength
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self.vision_span = VISION_SPAN # degrees
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self.draw_sensors = True
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# lets add 3 sensors as a start
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# 1 straight ahead
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# 2 left 15°
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# 3 right 15 °
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# we will give each of them a max lenght to
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# and we will eventually detect any line crossing the sensor and
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# retain the min value as a distance to collision input
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self.center_sensor = None
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self.left_sensor = None
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self.right_sensor = None
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self.sensors = [self.left_sensor, self.center_sensor, self.right_sensor]
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self.probes = [self.vision_length] *3
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if brain :
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self.brain = brain
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else :
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self.brain = Neural_Network()
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self.reset_car_pos()
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self.update_sensors()
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self.probe_brain()
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self.run = True
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def reset_car_pos(self):
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self.rect.center = (
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75 - int(random.random()*20) - 10,
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GY -50 - int(random.random()*20)-10
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)
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self.speed = 1
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self.heading = random.random() * 20
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self.heading_change = random.random() * 30
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def update_sensors(self):
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center = self.rect.center
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vc = angle_to_vector(self.heading)
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self.center_sensor = [center, (int(self.vision_length * vc[0] + center[0]), int(-self.vision_length * vc[1] + center[1]))]
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vl = angle_to_vector(self.heading+self.vision_span)
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self.left_sensor = [center, (int(self.vision_length * vl[0] + center[0]), int(-self.vision_length * vl[1] + center[1]))]
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vr = angle_to_vector(self.heading-self.vision_span)
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self.right_sensor = [center, (int(self.vision_length * vr[0] + center[0]), int(-self.vision_length * vr[1] + center[1]))]
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def update_position(self):
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vec = angle_to_vector(self.heading)
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old_center = self.rect.center
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self.rect.center = (self.speed * vec[0] / 2 + old_center[0], -self.speed * vec[1] / 2 + old_center[1])
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self.update_sensors()
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self.brain.fitness += int(distance(old_center, self.rect.center))
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def probe_lines_proximity(self, lines):
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# print(self.center_sensor, lines[0])
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self.probes = [self.vision_length*2] *3
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for idx,sensor in enumerate([self.left_sensor, self.center_sensor, self.right_sensor]) :
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for line in lines :
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ip = segments_intersection(sensor, line)
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# print(ip)
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if ip :
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pygame.draw.circle(screen, (125,125,255), ip, 4, 2)
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dist = int(distance(ip,self.rect.center))
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self.probes[idx] = min(dist, self.probes[idx])
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if dist < 1.2 * self.speed or self.speed < 0.01 :
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self.run = False
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self.speed = 0
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# print(f'Car {id(self)} crashed')
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return
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# else :
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# self.probes[idx] = self.vision_length * 2
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# print(self.probes)
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def probe_brain(self):
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res = self.brain.predict(np.array(self.probes))
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self.heading_change = res[0] * 15
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self.throttle = res[1] * 10
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def update(self):
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# rotate
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old_center = self.rect.center
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self.image = pygame.transform.rotate(self.original_image, self.heading)
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self.rect = self.image.get_rect()
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self.rect.center = old_center
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self.update_position()
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if self.speed < 0.01 or self.brain.fitness > CAR_MAX_FITNESS :
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self.run = False
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print(f'Car {id(self)} crashed')
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# print(
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# 'id', id(self),
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# 'Speed', self.speed,
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# 'heading', self.heading,
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# 'throttle', self.throttle,
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# 'heading change', self.heading_change,
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# )
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if self.speed :
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self.heading += self.heading_change * CAR_STEERING_FACTOR / self.speed
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self.heading = self.heading % 360
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self.speed += self.throttle #THROTTLE_POWER
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# if self.throttle :
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# self.speed += self.throttle #THROTTLE_POWER
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# else :
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# self.speed -= self.throttle #THROTTLE_POWER
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self.speed = max(0, self.speed)
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self.speed = min(self.speed, CAR_MAX_SPEED)
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super().update()
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def show_features(self):
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if self.draw_sensors:
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pygame.draw.line(screen, (255,0,0), self.center_sensor[0], self.center_sensor[1])
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pygame.draw.line(screen, (0,255,0), self.left_sensor[0], self.left_sensor[1])
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pygame.draw.line(screen, (0,0,255), self.right_sensor[0], self.right_sensor[1])
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pygame.draw.circle(screen, (125,255,125), self.rect.center, 4, 2)
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