x86 or x64 of VTK and Qt?

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Could someone kindly shed light on the selection of the installation of QT/VTK x86 or x64? I would like to create a GUI by QT with VTK integration for 3D medical imaging visualization. What are the main criteria for choosing between x86 and x64? For example, I know that the need for addressing an array which requires more than 4GB forces to use x64 architecture. Is there other criteria? For example, when it comes to distributing the GUI among others, is there something that determine the suitability of x86 or x64. Can I install QT x86 along with VTK x64? I would love to have the community's opinion on this.

asked 1 min ago

A2009

294

x86 or x64 of VTK and Qt?