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Content import bhi160 import vibra import display from apps.multiagentsnek.agent import Agent disp = display.open() q = [] # queue QLEN = 10 # enuff is enuff! class Snek(Agent): sens = bhi160.BHI160Accelerometer() def move(self): def clamp(val): return -1.0 if val < -1.0 else 1.0 if val > 1.0 else val samples = self.sens.read() for s in samples: if len(q) == QLEN: q.pop(0) x = 160 - int((clamp(s.x) + 1.0) * 80) y = int((clamp(s.y) + 1.0) * 40) q.append((x, y)) def paint(self): for i in range(0, len(q) - 1): c = int(20 + 235 * i / (len(q) - 1)) # color disp.line(q[i][0], q[i][1], q[i + 1][0], q[i + 1][1], col=(c,c,c), size=2) def collide(self): if len(q) < 4: return def lines_intersect(a,b,c,d, p,q,r,s): """ Thanks https://stackoverflow.com/a/24392281 """ det = (c - a) * (s - q) - (r - p) * (d - b) if det == 0: return False else: llama = ((s - q) * (r - a) + (p - r) * (s - b)) / det gamma = ((b - d) * (r - a) + (c - a) * (s - b)) / det return (0 < llama and llama < 1) and (0 < gamma and gamma < 1) for i in range(0, len(q) - 3): if lines_intersect(q[i][0], q[i][1], q[i+1][0], q[i+1][1], q[-2][0], q[-2][1], q[-1][0], q[-1][1]): # u hev eaten a rather large chunk of urself!! vibra.vibrate(160) global QLEN QLEN -= 10 for i in range(10): if len(q) >= 4: q.pop(0) return