LookRotation flipping 180 degrees through y axis

Question

I have LookRotation to rotate some points as the move through space, and when it crosses the Y axis it rotates by 180 degrees, sometimes 120, so there is an error in the mesh.

this is the rotation code i am using:

 function rotatem ( origVerts: Vector3 ):Vector3 {
 var rotation = Quaternion.LookRotation(line(steps+0.1)-line(steps-0.1), Vector3.up);
     //rotation *=Vector3(0,1,0);
     var translation: Vector3=Vector3.zero;
     var scale = Vector3(1, 1, 1);
     var newVerts: Vector3 ;
     //var rotation = Quaternion.Euler(0, Time.time%199, 0);    
     var m = Matrix4x4.TRS(translation, rotation, scale);
 
 
         newVerts = m.MultiplyPoint(origVerts);
     
     return newVerts;
 }

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Answer 1

Best Answer

Answer by frogsbo · Mar 14, 2014 at 06:58 PM

The answer is as RobertBu said. I have to define the LookRotation() second variable to be something relative to where it was pointing to recently... if i point the LookRotation() second variable to exactly 90'/-90 it stays completely straight, otherwise 95 degrees it goes corkscrew. If it's a square toothpase i can't control it yet, it's kindof pointing randomly depending on recent curve. A next challenge will be have straight and to control the rotation of square so that i can have some kinds of floor and walls.

many many thanks RobertBu, i love you :)

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LookRotation flipping 180 degrees through y axis

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