次声波  t=1 xt=t*5 yt=cos(t*360*8)*t 正弦波  t=1 xt=5*t*t yt=sin(t*8*360)*0.5 渐开线  pitch_diameter=10 pressure_angle=20 r=(pitch_diameter/2)*cos(pressure_angle) t=1 xt=r*cos(90*t*t)+r*(90*t*t)*(pi/180)*sin(90*t*t) yt=r*sin(90*t*t)-r*(90*t*t)*(pi/180)*cos(90*t*t) |
