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## Main Question or Discussion Point

Hi. I was just wondering if anyone could help me with a formula to solve the following problem.

I have two locations (L1 and L2), which I know the cartesian coordinates of, situated in a three dimensional space. I also have a distance (D) which I also know the value of. D is not the distance between L1 and L2. If an object moves from it's starting location at L1 in a straight line towards L2, how do I calculate the cartesian coordinates of the object after it has travelled a distance of D units.

I'd certainly appreciate any assistance in this.

Cheers.

I have two locations (L1 and L2), which I know the cartesian coordinates of, situated in a three dimensional space. I also have a distance (D) which I also know the value of. D is not the distance between L1 and L2. If an object moves from it's starting location at L1 in a straight line towards L2, how do I calculate the cartesian coordinates of the object after it has travelled a distance of D units.

I'd certainly appreciate any assistance in this.

Cheers.