44 lines
1.7 KiB
Python
44 lines
1.7 KiB
Python
import random
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import pygame
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from pygame import gfxdraw
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from globals import *
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class Node(object):
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# A node object contains data for each node
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def __init__(self, pos=(1,1), vel=(1,1), color=RED, radius=10, text="A"):
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self.pos = pos # This position is the center of the node
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self.vel = vel # Velocity vector
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self.color = color
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self.radius = radius
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self.text = text
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self.updateB= True
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self.font = pygame.font.SysFont(None, int(self.radius * 2.4))
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def update(self, dt):
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if (self.updateB):
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if (self.pos[0] <= 0):
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self.vel = (random.uniform(NODE_MIN_VEL, NODE_MAX_VEL), self.vel[1])
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if (self.pos[0] >= WIDTH):
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self.vel = (-random.uniform(NODE_MIN_VEL, NODE_MAX_VEL), self.vel[1])
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if (self.pos[1] <= 0):
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self.vel = (self.vel[0], random.uniform(NODE_MIN_VEL, NODE_MAX_VEL))
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if (self.pos[1] >= HEIGHT):
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self.vel = (self.vel[0], -random.uniform(NODE_MIN_VEL, NODE_MAX_VEL))
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x = self.pos[0] + self.vel[0] * dt
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y = self.pos[1] + self.vel[1] * dt
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self.pos = (x,y)
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def draw(self, surface):
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# Draw the node
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gfxdraw.aacircle(surface, int(self.pos[0]), int(self.pos[1]), self.radius, self.color)
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gfxdraw.filled_circle(surface, int(self.pos[0]), int(self.pos[1]), self.radius, self.color)
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# Draw the text at the center of the node
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textItem = self.font.render(self.text[0], True, BLACK)
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textWidth = textItem.get_rect().width
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textHeight = textItem.get_rect().height
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surface.blit(textItem, (int(self.pos[0] - textWidth/2), int(self.pos[1] - textHeight/2)))
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