Snap object to the ground : Unity editor extension

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In this tutorial, we are going to take a look on how to make unity editor extension that allows you to snap object to the ground. First of all take a look at these then I will explain step by step.

In first picture, what we have in unity is one cube, sphere, plane (for ground), directional light, main camera and C# script name snapToGround (which you don't have to attach to any game object in unity).

In second picture, hope you can see numbers next to each line because I will explain number by number.
Number one indicates you have to add that line to get access to unity editor.

Number two - is for menu item name.

Number three - create function and name it whatever you want, I named mine Snap.

Number four - puts all the selected objects into the array.

Number five - foreach function goes through each object in array just created in number four.

Number six - checks raycasting downward from selected object.

Number seven - gets the position of hit point.

Number eight - checks if selected object has mesh filter in it.

Number nine - collects bounds of selected object.

Number ten - adds half of bounds from y side to targeted object's y position so selected object doesn't go half inside the floor.

Number eleven - converts selected object's position to hit point's position.

Number twelve - last two keep the original rotation value of selected objects.

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