k3d/share/shaders/k3d_noisysmoke.sl:53:  float ss, dtau, last_dtau, end;
k3d/share/shaders/k3d_noisysmoke.sl:77:	  last_dtau = dtau;
k3d/share/shaders/k3d_noisysmoke.sl:85:	    tau = .5 * ss * (dtau + last_dtau);
k3d/share/shaders/k3d_noisysmoke.sl:86:	  lighttau = .5 * ss * (li * dtau + last_li * last_dtau);
k3d/share/shaders/k3d_smoke.sl:85:  float dtau, last_dtau;
k3d/share/shaders/k3d_smoke.sl:100:	       smokeoctaves, ss, last_li, last_dtau);
k3d/share/shaders/k3d_smoke.sl:114:      float tau = opacdensity * ss / 2 * (dtau + last_dtau);
k3d/share/shaders/k3d_smoke.sl:116:	lightdensity * ss / 2 * (li * dtau + last_li * last_dtau);
k3d/share/shaders/k3d_smoke.sl:121:      last_dtau = dtau;
k3d/share/shaders/k3d_smoke2.sl:100:  float ss, dtau, last_dtau, end;
k3d/share/shaders/k3d_smoke2.sl:122:	  last_dtau = dtau;
k3d/share/shaders/k3d_smoke2.sl:130:	  tau = .5 * ss * (dtau + last_dtau);
k3d/share/shaders/k3d_smoke2.sl:131:	  lighttau = .5 * ss * (li*dtau + last_li*last_dtau);
