74 lines
2.1 KiB
Python
74 lines
2.1 KiB
Python
from math import tan, radians
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import pygame
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from pygame import Surface
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from pygame.draw import line
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from lib.pgfw.pgfw.GameChild import GameChild
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class Mask(GameChild, Surface):
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def __init__(self, parent):
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GameChild.__init__(self, parent)
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self.display_surface = self.get_display_surface()
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self.load_configuration()
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self.init_surface()
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self.set_background()
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self.reset()
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def load_configuration(self):
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config = self.get_configuration("land")
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self.height = config["height"]
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self.spacing_factor = config["spacing-factor"]
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self.gradient = config["gradient"]
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self.x_step = config["x-step"]
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self.velocity_ratio = config["velocity-ratio"]
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def init_surface(self):
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Surface.__init__(self, (self.get_display_surface().get_width(), self.height))
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def set_background(self):
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background = Surface(self.get_size())
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background.fill((0, 0, 0))
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self.background = background
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def reset(self):
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self.x_offset = 0
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def update(self):
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self.clear()
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self.draw_y()
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self.draw_x()
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def clear(self):
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self.blit(self.background, (0, 0))
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def draw_y(self):
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yy = 0
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ii = 0
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rect = self.get_rect()
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while yy < rect.bottom:
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line(self, (255, 255, 255), (0, yy), (rect.right, yy))
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yy += int(self.spacing_factor ** ii)
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ii += 1
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def draw_x(self):
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gradient = self.gradient
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step = self.x_step
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rect = self.get_rect()
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edge = rect.right
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xx = int(self.x_offset) + step
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adjacent = rect.h
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while xx < edge:
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angle = (edge - float(xx)) / edge * 2 * gradient + (90 - gradient)
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opposite = int(tan(radians(90 - angle)) * adjacent)
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line(self, (255, 255, 255), (xx, 0),
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(xx + opposite, adjacent))
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xx += step
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self.decrement_x_offset()
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def decrement_x_offset(self):
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self.x_offset -= self.parent.parent.velocity[0] * self.velocity_ratio
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if self.x_offset <= -self.x_step:
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self.x_offset += self.x_step
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