private float doRotation(Vector3 center, Vector2 oldScreenPos, Vector2 newScreenPos)
{
var newVector = projectionLayer.ProjectTo(newScreenPos, TransformPlane) - center;
var oldVector = projectionLayer.ProjectTo(oldScreenPos, TransformPlane) - center;
var angle = Vector3.Angle(oldVector, newVector);
if (Vector3.Dot(Vector3.Cross(oldVector, newVector), TransformPlane.normal) < 0)
{
angle = -angle;
}
return(angle);
}
/// <inheritdoc />
protected override float doRotation(Vector2 oldScreenPos1, Vector2 oldScreenPos2, Vector2 newScreenPos1,
Vector2 newScreenPos2)
{
var newVector = projectionLayer.ProjectTo(newScreenPos2, TransformPlane) -
projectionLayer.ProjectTo(newScreenPos1, TransformPlane);
var oldVector = projectionLayer.ProjectTo(oldScreenPos2, TransformPlane) -
projectionLayer.ProjectTo(oldScreenPos1, TransformPlane);
var angle = Vector3.Angle(oldVector, newVector);
if (Vector3.Dot(Vector3.Cross(oldVector, newVector), TransformPlane.normal) < 0)
{
angle = -angle;
}
return(angle);
}
