===== Primitive: Block =====

**Definition**: x:[vertex[1], vertex[1]+dx], ...

**Call**: hfBlock(x,vertex,dx,dy,dz);

**Parameters**:

x - point coordinates array

vertex - block vertex coordinates array

dx,dy,dz - edge lengths along x,y,z

**Test file**: [[http://hyperfun.org/block.hf|block.hf]]