本文整理汇总了C#中Matrix4x4.GetRow3方法的典型用法代码示例。如果您正苦于以下问题：C# Matrix4x4.GetRow3方法的具体用法？C# Matrix4x4.GetRow3怎么用？C# Matrix4x4.GetRow3使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类Matrix4x4的用法示例。
在下文中一共展示了Matrix4x4.GetRow3方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: FromMatrix4
public void FromMatrix4( Matrix4x4 a )
{
r0.FromVector4( a.GetRow0() ); r1.FromVector4( a.GetRow1() ); r2.FromVector4( a.GetRow2() ); r3.FromVector4( a.GetRow3() );
}示例2: ComputeObjectDeltaPositionRotation
/// <summary>
/// Helper method that helps to compute the difference in translation and rotation of an object moving from one frame to the other
/// This is essentially used for motion blur
/// </summary>
/// <param name="_Previous">The object's matrix at previous frame</param>
/// <param name="_Current">The object's matrix at current frame</param>
/// <param name="_DeltaPosition">Returns the difference in position from last frame</param>
/// <param name="_DeltaRotation">Returns the difference in rotation from last frame</param>
/// <param name="_Pivot">Returns the pivot position the object rotated about</param>
public static void ComputeObjectDeltaPositionRotation( ref Matrix4x4 _Previous, ref Matrix4x4 _Current, out Vector _DeltaPosition, out Quat _DeltaRotation, out Vector _Pivot )
{
// Compute the rotation the matrix sustained
Quat PreviousRotation = QuatFromMatrix( _Previous );
Quat CurrentRotation = QuatFromMatrix( _Current );
_DeltaRotation = QuatMultiply( QuatInvert( PreviousRotation ), CurrentRotation );
Vector PreviousPosition = (Vector) _Previous.GetRow3();
Vector CurrentPosition = (Vector) _Current.GetRow3();
// Retrieve the pivot point about which that rotation occurred
_Pivot = CurrentPosition;
AngleAxis AA = new AngleAxis( _DeltaRotation );
float RotationAngle = AA.Angle;
if ( Math.Abs( RotationAngle ) > 1e-4f )
{
Vector RotationAxis = AA.Axis;
Vector Previous2Current = CurrentPosition - PreviousPosition;
float L = Previous2Current.Length;
if ( L > 1e-4f )
{
Previous2Current /= L;
Vector N = Previous2Current.Cross( RotationAxis );
N.Normalize();
Vector MiddlePoint = 0.5f * (PreviousPosition + CurrentPosition);
float Distance2Pivot = 0.5f * L / (float) Math.Tan( 0.5f * RotationAngle );
_Pivot = MiddlePoint + N * Distance2Pivot;
}
// Rotate previous position about pivot, this should yield us current position
Vector RotatedPreviousPosition = RotateAbout( PreviousPosition, _Pivot, _DeltaRotation );
// // Update previous position so the remaining position gap is filled by delta translation
// PreviousPosition = RotatedPreviousPosition;
PreviousPosition = CurrentPosition; // Close the gap so we have no delta translation
}
_DeltaPosition = CurrentPosition - PreviousPosition; // Easy !
}