D3DXQuaternionToAxisAngle

Computes a quaternion's axis and angle of rotation.

void D3DXQuaternionToAxisAngle(
  CONST D3DXQUATERNION* pQ,
  D3DXVECTOR3* pAxis,
  FLOAT* pAngle
); 

Parameters

pQ

[in, out] Pointer to the source D3DXQUATERNION structure.

pAxis

[in, out] When this function returns, pointer to a D3DXVECTOR3 structure that identifies the quaternion's axis.

pAngle

[in, out] When this function returns, pointer to a FLOAT value that identifies the quaternion's angle of rotation in radians.

Return Values

None.

Remarks

This function expects unit quaternions.

Requirements

  Header: Declared in D3dx8math.h.
  Import Library: Use D3dx8.lib.