public bool BeginCapture(MMDModel target, HitResult hit)
{
// save local and world frames
rotateFrameL = target.GetGameObjectFrame(CoordSpace.ObjectCoords);
rotateFrameW = target.GetGameObjectFrame(CoordSpace.WorldCoords);
rotateAxisW = rotateFrameW.GetAxis(nRotationAxis);
// save angle of hitpos in 2D plane perp to rotateAxis, so we can find delta-angle later
Vector3f vWorldHitPos = hit.HitPosition;
Vector3f dv = vWorldHitPos - rotateFrameW.Origin;
int iX = (nRotationAxis + 1) % 3;
int iY = (nRotationAxis + 2) % 3;
float fX = Vector3f.Dot(dv, rotateFrameW.GetAxis(iX));
float fY = Vector3f.Dot(dv, rotateFrameW.GetAxis(iY));
fRotateStartAngle = (float)Math.Atan2(fY, fX);
// construct plane we will ray-intersect with in UpdateCapture()
raycastFrame = new Frame3f(vWorldHitPos, rotateAxisW);
if (EnableSnapping)
{
//enable_circle_indicator(true);
}
return(true);
}
public static float AngleBetween(Vector3 a, Vector3 b)
{
// // Due to float error the dot / mag can sometimes be ever so slightly over 1, which can cause NaN in acos.
//return Mathf.Acos(Vector3.Dot(a, b) / (a.magnitude * b.magnitude)) * MathUtil.RAD_TO_DEG;
double d = (double)Vector3.Dot(a, b) / ((double)a.Length() * (double)b.Length());
if (d >= 1d)
{
return(0f);
}
else if (d <= -1d)
{
return(180f); //why 180 and not -180??
}
return(MathUtil.RadiansToDegrees((float)System.Math.Acos(d)));
}
private void ProcessTranslationDrag()
{
if (m_activeAxis == EGizmoAxis.None)
{
return;
}
if (m_activeAxisList.Count <= 0)
{
return;
}
Ray pickRay = CreateMouseRay(in m_frameViewInfo);
if (m_activeAxisList.Count > 1)
{
Vector3 planeNormal = Vector3.Cross(m_activeAxisList[0], m_activeAxisList[1]);
Plane intersectionPlane = new Plane(m_startLocation, planeNormal);
if (intersectionPlane.Intersects(ref pickRay, out Vector3 intersection))
{
m_controlledTransform.SetWorldPosition(intersection - m_clickOffset);
}
}
else
{
Vector3 planeTangent = Vector3.Cross(m_activeAxisList[0], m_frameViewInfo.ViewLocation - m_gizmoLocation);
Vector3 planeNormal = Vector3.Cross(m_activeAxisList[0], planeTangent);
Plane intersectionPlane = new Plane(m_startLocation, planeNormal);
if (intersectionPlane.Intersects(ref pickRay, out Vector3 intersection))
{
intersection -= m_originalPosition + m_clickOffset;
m_controlledTransform.SetWorldPosition(m_originalPosition + m_activeAxisList[0] * Vector3.Dot(intersection, m_activeAxisList[0]));
}
}
}
