k3d/share/shaders/k3d_celld.sl:19:	float voro_step = 0.05; /* desc {Step value size.  If the difference
k3d/share/shaders/k3d_contacshadow.sl:52:	/* the difference between the two distances is used to calculate the  
k3d/share/shaders/k3d_corktile.sl:24: *   tileheight = 0 there are bumps on the tile surface of height tileheight, but no difference
k3d/share/shaders/k3d_fresnelplastic.sl:56:			  NURBs differences.} */
k3d/share/shaders/k3d_shiftedmoontile.sl:41:#define difference(a, b) ((a) - (a) * b)
k3d/share/shaders/k3d_shiftedmoontile.sl:84:	mix_opacity = difference (circle1, circle2);
k3d/share/shaders/k3d_srfdeformation.sl:73:    /* Calculate shading difference between P and Porig*/
