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Question by commodore · Mar 17, 2015 at 10:28 PM · vector3point

How do I get the Vector3 between two points 3/10 of the way?

Here's a little drawing of what I mean. I want to get the Vector3 of the green point. 3/10th of the way between the red and the blue point.

http://i.imgur.com/d3LnodP.png

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avatar image Cherno · Mar 17, 2015 at 10:46 PM 0
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Sounds good, except that 3/10 != 10/3 ;)

Edit: Heh, he deleted his comment :/

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Answer by S_Darkwell · Mar 17, 2015 at 11:06 PM

 Vector3 pointGreen = Vector3.Lerp(pointRed, pointBlue, 0.3f);
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avatar image Cherno · Mar 17, 2015 at 11:08 PM 0
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Ah yes of course, Vector3.Lerp... It's often used only for smooth transitions but actually at is base is designed to do exactly what the OP needs! Upvoted.

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Answer by Cherno · Mar 17, 2015 at 10:42 PM

This should work:

 Vector3 redPos = new Vector3(0,0,0);
 Vector3 bluePos = new Vector3(6,3,6);
 Vector3 dir = bluePos - redPos;
 float distance = Vector3.Distance(redPos , bluePos);
 
 Vector3 oneThird = redPos + dir * (distance * 0.3f);
 

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avatar image Owen-Reynolds · Mar 18, 2015 at 04:43 AM 0
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Interestingly enough, this is mostly the definition of Lerp (except dir isn't defined?) Anther way is: redPos+(bluePos-redPos)*0.3f;

avatar image Cherno · Mar 18, 2015 at 12:24 PM 0
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You are right, I forgot to define dir, which is of course the direction vector.

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