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highlight is strange

humkyung's picture

i am developing 3d viewer program.
one day, i encountered some strange situation.
when i move mouse cursor, an object is highlighted but mouse cursor isn't on the object.
please, see attached image file.

i think that this situation happen because the coordinate of model is big like below
start = 6854500,6967295,24300
end = 6854500,6967295,29600

any idea to avoid this situation?

thanks in advance.