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Several examples lacked a render before starting the interactor. This
caused a blank window until the firat interaction.


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Several examples lacked a render before starting the interactor. This
caused a blank window until the firat interaction.


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To dynamic_cast a SmartPointer we need to use GetPointer().
Regular pointers can just use dynamic_cast.


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This MR changed all CMakeLists.txt files got support he standalone
build uder the new vtk module system.

All CMakeLists.txt files were changed to use the new and old vtk
module system,

A new Wiki macro was added, AddOptionalIfInLibrary.cmake. This macro
checks to see if an optional module is included in the VTK_LIBRARIES.

A new Wiki macro was added, WikiLoadMacros.cmake. This macro loads all of the example macros. With this, the includes could be removed frm the individual CMakeLists.txt file.


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Ancient versions of CMake required else(), endif(), and similar block
termination commands to have arguments matching the command starting the
block. This is no longer the preferred style.


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Ancient CMake versions required upper-case commands. Later
command names became case-insensitive. Now the preferred style
is lower-case


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lots of warnings


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