if(terrain.patchobjectnum[whichpatchx][whichpatchz])
for(l=0;l<terrain.patchobjectnum[whichpatchx][whichpatchz];l++){
i=terrain.patchobjects[whichpatchx][whichpatchz][l];
if(terrain.patchobjectnum[whichpatchx][whichpatchz])
for(l=0;l<terrain.patchobjectnum[whichpatchx][whichpatchz];l++){
i=terrain.patchobjects[whichpatchx][whichpatchz][l];