main/src/georegression/geometry/GeometryMath_F64.java
public static void sub( GeoTuple3D_F64 a, GeoTuple3D_F64 b, GeoTuple3D_F64 c ) {
		c.x = a.x - b.x;
		c.y = a.y - b.y;
		c.z = a.z - b.z;
	}
public static void sub( GeoTuple3D_F64 a, GeoTuple3D_F64 b, GeoTuple3D_F64 c ) {
		c.x = a.x - b.x;
		c.y = a.y - b.y;
		c.z = a.z - b.z;
	}
<p>
Substracts two points from each other.<br>
<br>
c = a - b
</p>
<p/>
<p>
Point 'c' can be the same instance as 'a' or 'b'.
</p>

@param a A point. Not modified.
@param b A point. Not modified.
@param c Where the results are stored. Modified.