GetSandInArea(<-area <-isRound <-sandDefs <-inclusive)

Returns a list of sand found in the area. Each entry in the list is a V3 where x and y are the position of the sand and z is the sand def.
Area is a V4 that specifies the lower left and upper right of an area.
IsRound is a bool that indicates whether the full rectangular area should be used or an elliptical area.
SandDefs is a list that specifes the sand defs to match against.
Inclusive is a bool. It indicates where to find only the sand specified in sandDefs, or to find only the sand NOT specified in sandDefs.