int dsmpixel(string map, string channel, int x, int y, <type>&values)
Each pixel of a deep shadow map channel has multiple values. This function will extract the list of the values associated with the channel for the given pixel.
Returns 1 on success and 0 on failure. If the function fails, the values variable will not be modified, and so may be left uninitialized.
A DSM will always have
Of channels. The
Pz channel stores the
z-depth associated with each record. The
Of channel stores the opacity.