k3d/share/shaders/k3d_cloudplane.sl:27:    float y, fy, yfreq, yphase;
k3d/share/shaders/k3d_cloudplane.sl:39:    yfreq = 2 * PI * 0.021;
k3d/share/shaders/k3d_cloudplane.sl:46:            (offset + cos(yfreq * (y + yphase)));
k3d/share/shaders/k3d_cloudplane.sl:48:        xphase = PI/2 * 0.9 * cos(yfreq * y);
k3d/share/shaders/k3d_cloudplane.sl:52:        yfreq *= 2.2 - i * 0.08; /* approximately 2 */
k3d/share/shaders/k3d_projectionmap_plastic.sl:37:	float yfreq = 1.0;
k3d/share/shaders/k3d_projectionmap_plastic.sl:50:			float y = yfreq * (ycomp(Pshad) - yoffset + 0.5);
