Hi,all

I have met some questions while reading the sourcecode of hugin.

1. I noticed that there are two functions named createTransform and
createInvTransform in PanoToolsInterface.cpp. What are they used for?
In "createTransform", there are two lines:
                m_srcTX = destSize.x/2.0;    m_srcTY = destSize.y/
2.0;
What do m_srcTX and m_srcTY mean? and why destSize.x and destSize are
divided by 2.0?

2. In SpaceTransform.cpp, a variable named "params.distance" appears
many times. What does it mean?

3. What is the function "AddTransform" in SpaceTransform.cpp used for?

Thanks for your help!

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