Using a semiclassical approach, we have calculated electron-, proton-, and He III-impact line widths and shifts for 4 Ca IX multiplets for perturber densities 10^18^-10^22^cm^-3^ and 48 Ca X multiplets for perturber densities 10^17^-10^22^cm^-3^. In both cases the temperature range is T=200000-5000000K. For lower perturber densities, obtained results are linear with perturber density.