Plane: Return null instead of undefined in intersectLine(). #21468
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Related issue: Fixed #19784.
Description
Similar to other
intersect*()methods,Plane.intersectLine()now usesnullinstead ofundefinedto represent "no intersection found".I've considered to make the same change in
Object3D.getObjectByProperty()however this might potentially break a lot of code. I also think it is not that urgent since allgetObjectBy*()methods behave consistently (which is not true for the intersection routines).