create the kernel functions for polyprism
create the kernel functions for polyprism

eusoubrasileiro/fatiando_seismic,santis19/fatiando,fatiando/fatiando,drandykass/fatiando,victortxa/fatiando,eusoubrasileiro/fatiando,mtb-za/fatiando,mtb-za/fatiando,rafaelmds/fatiando,cmeessen/fatiando,santis19/fatiando,fatiando/fatiando,victortxa/fatiando,eusoubrasileiro/fatiando,eusoubrasileiro/fatiando_seismic,drandykass/fatiando,cmeessen/fatiando,eusoubrasileiro/fatiando,rafaelmds/fatiando