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boat.py
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#!/usr/bin/env python
# -*- coding:utf-/ -*-
__author__ = '&USER'
import pygame
import math
# 避碰方向.
turn_right = 2
turn_left = 3
# 角度偏转大小。
turn_angle = 1.5
class Boat:
def __init__(self, image, angle, x_location, y_location, speed):
# 加载小船图像
self.boat_image = image
# 图像位置，移动图像的基础
self.boat_x_location = x_location
self.boat_y_location = y_location
# 小船移动速度
self.speed = speed
# 移动时的角度
self.boat_angle = angle
self.boat_angle_radians = math.radians(self.boat_angle)
# 小船船头位置，计算dcpa和tcpa
self.boat_original_instance = pygame.image.load(self.boat_image).convert()
self.boat_instance = pygame.transform.rotate(self.boat_original_instance, self.boat_angle)
self.boat_head_x, self.boat_head_y = self.get_boat_head()
self.boat_original_angle = angle
if 60 < self.boat_original_angle < 300:
self.left_limit = self.boat_original_angle + 60
self.right_limit = self.boat_original_angle - 60
elif 0 <= self.boat_original_angle <= 60:
self.left_limit = self.boat_original_angle + 60
self.right_limit = self.boat_original_angle + 300
elif 300 <= self.boat_original_angle <= 360:
self.left_limit = self.boat_original_angle - 300
self.right_limit = self.boat_original_angle - 60
def get_boat_head(self):
rect = self.boat_instance.get_rect()
binary_width = rect.width / 2
binary_height = rect.height / 2
mid_x = self.boat_x_location + binary_width
mid_y = self.boat_y_location + binary_height
if 0 <= self.boat_angle < 90:
x = mid_x - binary_width * math.fabs(math.sin(self.boat_angle_radians))
y = mid_y - binary_height * math.fabs(math.cos(self.boat_angle_radians))
elif 90 <= self.boat_angle < 180:
x = mid_x - binary_width * math.fabs(math.sin(self.boat_angle_radians))
y = mid_y + binary_height * math.fabs(math.cos(self.boat_angle_radians))
elif 180 <= self.boat_angle < 270:
x = mid_x + binary_width * math.fabs(math.sin(self.boat_angle_radians))
y = mid_y + binary_height * math.fabs(math.cos(self.boat_angle_radians))
else:
x = mid_x + binary_width * math.fabs(math.sin(self.boat_angle_radians))
y = mid_y - binary_height * math.fabs(math.cos(self.boat_angle_radians))
return x, y
def get_boat_instance(self):
return self.boat_instance
def move(self):
self.boat_angle_radians = math.radians(self.boat_angle)
if 0 <= self.boat_angle < 90:
self.boat_x_location -= self.speed * math.fabs(math.sin(self.boat_angle_radians))
self.boat_y_location -= self.speed * math.fabs(math.cos(self.boat_angle_radians))
elif 90 <= self.boat_angle < 180:
self.boat_x_location -= self.speed * math.fabs(math.sin(self.boat_angle_radians))
self.boat_y_location += self.speed * math.fabs(math.cos(self.boat_angle_radians))
elif 180 <= self.boat_angle < 270:
self.boat_x_location += self.speed * math.fabs(math.sin(self.boat_angle_radians))
self.boat_y_location += self.speed * math.fabs(math.cos(self.boat_angle_radians))
elif 270 <= self.boat_angle <= 360:
self.boat_x_location += self.speed * math.fabs(math.sin(self.boat_angle_radians))
self.boat_y_location -= self.speed * math.fabs(math.cos(self.boat_angle_radians))
# 每次移动之后计算新的头部位置
self.boat_head_x, self.boat_head_y = self.get_boat_head()
def angle_move(self, direction):
flag = 1
if self.boat_angle == self.left_limit and direction == turn_left or self.right_limit == self.boat_angle and direction == turn_right:
flag = 0
if 1 == flag and turn_right == direction:
if self.boat_angle == 0:
self.boat_angle = 360
self.boat_angle = self.boat_angle - turn_angle
elif 1 == flag and turn_left == direction:
if self.boat_angle == 360:
self.boat_angle = 0
self.boat_angle = self.boat_angle + turn_angle
self.boat_instance = pygame.transform.rotate(self.boat_original_instance, self.boat_angle)
def state_finish(self):
if self.boat_head_x < 0 or self.boat_head_y < 0:
return 1
return 0