public void BeginDraw_Ray(Ray3f ray, AnyRayHit rayHit, int nStep)
{
CreateNewPrimitive();
Vector3f hitPos = rayHit.hitPos;
// try snap points
SnapResult snap = Snaps.FindHitSnapPoint(ray);
if (snap != null)
{
Frame3f snapF = scene.ToWorldFrame(snap.FrameS);
hitPos = snapF.Origin;
}
Frame3f sceneW = scene.SceneFrame;
if (rayHit.hitSO == null)
{
primStartW = sceneW;
primStartW.Origin = hitPos;
}
else
{
if (scene.Context.TransformManager.ActiveFrameType == FrameType.WorldFrame)
{
primStartW = sceneW;
primStartW.Origin = hitPos;
}
else if (rayHit.hitSO is PivotSO)
{
primStartW = (rayHit.hitSO as PivotSO).GetLocalFrame(CoordSpace.WorldCoords);
primStartW.Origin = hitPos;
}
else if (rayHit.hitSO is PrimitiveSO)
{
// align with object frame as much as possible, given that we still want
// to use hit normal...
Frame3f objFrame = (rayHit.hitSO as PrimitiveSO).GetLocalFrame(CoordSpace.WorldCoords);
int nBestAxis = MathUtil.MostParallelAxis(objFrame, rayHit.hitNormal);
int nPerp = (nBestAxis + 1) % 3;
primStartW = new Frame3f(hitPos, rayHit.hitNormal, 1);
primStartW.ConstrainedAlignAxis(0, objFrame.GetAxis(nPerp), primStartW.Y);
}
else
{
primStartW = new Frame3f(hitPos, rayHit.hitNormal, 1);
primStartW.ConstrainedAlignAxis(1, sceneW.Y, primStartW.Y);
}
}
primitive.Frame = primStartW;
primStartS = scene.ToSceneFrame(primStartW);
}
public override bool UpdateCapture(ITransformable target, Ray3f worldRay)
{
// find hit
SnapResult snap = Targets.FindHitSnapPoint(worldRay);
snapState.UpdateState(snap);
if (snapState.IsSnapped)
{
SnapResult useSnap = snapState.ActiveSnapTarget;
Frame3f hitFrameS = Frame3f.Identity;
if (useSnap != null)
{
hitFrameS = new Frame3f(useSnap.FrameS);
}
Frame3f targetF = originalTargetS; // target.GetLocalFrame(CoordSpace.WorldCoords);
Frame3f pivotF = hitFrameS;
targetF.Origin = pivotF.Origin;
if (parent.CurrentFrameMode == FrameType.WorldFrame)
{
targetF.Rotation = Quaternion.identity;
}
else
{
targetF.Rotation = pivotF.Rotation;
}
Vector3f deltaInT = targetF.FromFrameV(SourceFrameL.Origin);
targetF.Origin -= deltaInT; // why is this minus?
target.SetLocalFrame(targetF, CoordSpace.SceneCoords);
}
else
{
Func <SceneObject, bool> filter = null;
if (TargetObjects != null && TargetObjects.Count > 0)
{
filter = (x) => { return(TargetObjects.Contains(x) == false); }
}
;
AnyRayHit hit;
if (scene.FindSceneRayIntersection(worldRay, out hit, true, filter))
{
Vector3f hitPosS = scene.ToSceneP(hit.hitPos);
Vector3f hitNormS = scene.ToSceneN(hit.hitNormal);
Frame3f targetF = originalTargetS;
targetF.Origin = hitPosS;
targetF.AlignAxis(1, hitNormS);
if (parent.CurrentFrameMode == FrameType.WorldFrame)
{
targetF.Rotation = Quaternion.identity;
}
Vector3f deltaInT = targetF.FromFrameV(SourceFrameL.Origin);
targetF.Origin -= deltaInT; // why is this minus?
target.SetLocalFrame(targetF, CoordSpace.SceneCoords);
}
else
{
target.SetLocalFrame(originalTargetS, CoordSpace.SceneCoords);
}
}
return(true);
}