Does anyone have some working code in how to implement quaternions to rotate the camera. (In Direct3D that is) I´ve read some things about quats but I don´t know how to implement them. Any help appreciated.
Bad Monkey Productions
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About quaternions.
122
August 16, 2002 12:17 PM
D3DXQUATERNION qR; D3DXQuaternionRotationYawPitchRoll(&qR, m_fYaw, m_fPitch, m_fRoll); D3DXMatrixAffineTransformation(&m_matOrientation, 1.25f, NULL, &qR, &m_vPosition ); D3DXMatrixInverse( &m_matView, NULL, &m_matOrientation ); Then m_matView you use for your view matrix.
--Helicon56.
August 16, 2002 03:06 PM
Thank you very much! I really don´t know jacks-bhind about quats so can I do like this...
...to rotate my camera? Is m_vPosition the camera´s lookat position?
Bad Monkey Productions
D3DXMATRIX m_matOrientation; D3DXQUATERNION qR; D3DXQuaternionRotationYawPitchRoll(&qR, m_fYaw, m_fPitch, m_fRoll); D3DXMatrixAffineTransformation(&m_matOrientation, 1.25f, NULL, &qR, &m_vPosition ); D3DXMatrixInverse( &m_matView, NULL, &m_matOrientation ); iD3DDevice8->SetTransform(D3DTS_VIEW, m_matView); ...to rotate my camera? Is m_vPosition the camera´s lookat position?
Bad Monkey Productions
122
August 17, 2002 08:33 AM
Yeah that should work fine. m_vPosition is the position of the camera in the world. You specify it''s look at point by changing it''s yaw pitch and roll. Just play around with it for a while and you''ll figure it out.
--Helicon56.
--Helicon56.
August 17, 2002 08:45 AM
August 19, 2002 12:49 PM
Hmm, I´m trying to use this code to rotate it but nothing happends when I do.
Any ideas on what I´m doing wrong. I´m trying to render a textured quad, when i use the ordinary lookat function it works just fine.
Bad Monkey Productions
D3DXMATRIX m_matOrientation; D3DXQUATERNION qR; D3DXQuaternionRotationYawPitchRoll(&qR, 0.0f, 0.0f, 0.0f); D3DXMatrixAffineTransformation(&m_matOrientation, 1.25f, NULL, &qR, &D3DXVECTOR3(0.0f,0.0f,0.0f)); D3DXMatrixInverse( &m_matView, NULL, &m_matOrientation ); m_iD3DDevice8->SetTransform(D3DTS_VIEW, &matView); Any ideas on what I´m doing wrong. I´m trying to render a textured quad, when i use the ordinary lookat function it works just fine.
Bad Monkey Productions
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