Swaps the values of \c *this and \a other. * Overloaded for performance: this version performs a \em shallow swap by swaping pointers and attrib

The size of the parameter block.

Return the number of defined regions

Return a pointer to the block structure. We continue to hold ownership of the object though.

* @brief Converts the given (x,y) coordinates which are in OpenGL canonical coordinates to widget coordinates. **/

Inverse

the area : w*h*/

Only plain matrices/arrays, not expressions, may be resized; therefore the only useful resize methods are * Matrix::resize() and Array::resize()

code proofread and fixed by @devernay on 8/8/2014

Swaps the contents of two vectors in constant time.