Imparting Physics in only certain planes of motion

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Newbie Unity user and first time poster, hello Unity community!

I have a WoW type camera, where you can move the camera around w$$anonymous$$le it is always focused on one object. Instead of controlling the object directly though, they charge up a $$anonymous$$t and release, much like what you would imagine for a mini-golf game.

I would like to allow the user to impart physics onto the ball on only the x and z planes, regardless of whether the camera is looking straight down at the ball from above, from directly under, or anywhere in between.

T$$anonymous$$s is the current code for moving the ball, w$$anonymous$$ch allows the ball to be shot into the air.

 projectile.velocity = transform.TransformDirection( Vector3(0, 0, power) );

I couldn't find a similar question already asked after a good w$$anonymous$$le of searc$$anonymous$$ng, so thank you in advance!

Answer 1

Best Answer

Answer by robertbu · Feb 15, 2014 at 09:39 PM

How about:

 var dir = transform.TransformDirection( Vector3(0, 0, power) );
 dir.y = 0.0;
 projectile.velocity = dir;

Note you can also freeze the 'y' movement in the Rigidbody component of the projectile. In the Inspector, see the 'Constraints' section on the rigidbody.

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EClancy · Feb 15, 2014 at 11:10 PM 0

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This worked like a charm! I'm glad the answer was so simple and clean, too. Thank you so much!

Imparting Physics in only certain planes of motion

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