[kraf]

Hello, I'm having some problems to understand the source code of a program in openfoam. For instance what is the meaning of a command boundbox could somebody help me to understand this lines?
Thanks for your help!
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Code:
boundBox* meshBB = new boundBox(this->points(), false);
vector span = meshBB->span();
delete meshBB;
scalar waterDepth = meshBB->max()[2]; // What is this [2]?
waterDepth = ibProperties().lookupOrDefault<scalar>
("waterDepth",waterDepth);
waterDepth = objectDictList()[objectID].lookupOrDefault<scalar>
("waterDepth",waterDepth);