Stupid rotation question

Started by Abdhl Al Hazred October 10, 2002 12:36 AM

1 comment, last by Abdhl Al Hazred 22 years, 4 months ago

Author

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October 10, 2002 12:36 AM

I have a frustration problem... I want the find the angle beteen the vector from the object to the point where I click the with the mouse. How to do it? I know the objects position and direction. This is how I think I should do:

  

pkObject->m_fDstRadAngleCWZ = (float) atan( 
(pkObject->m_kClickPos.y - pkObject->m_kPos.y) / (pkObject->m_kClickPos.x - pkObject->m_kPos.x) );    

if( pkObject->m_kClickPos.x < pkObject->m_kPos.x )
   pkObject->m_fDstRadAngleCWZ -= D3DX_PI;

It works but the angle is not between (0 to 2 pi) but (0.5 to -0.5 pi). I can´t use that angle! Please help!

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