private void AddPositionKeyLines(Position3DTrack positionTrack, Color majorLineColor, Color minorLineColor, Point3D startPosition, int segmentsCount)
{
// First create WireCrossVisual3D and PolyLineVisual3D at the key frame positions
var point3DCollection = new Point3DCollection(positionTrack.KeysCount);
foreach (var positionKeyFrame in positionTrack.Keys)
{
point3DCollection.Add(positionKeyFrame.Position);
var wireCrossVisual3D = new Ab3d.Visuals.WireCrossVisual3D()
{
Position = new Point3D(positionKeyFrame.Position.X + startPosition.X, positionKeyFrame.Position.Y + 1, positionKeyFrame.Position.Z + startPosition.Z),
LinesLength = 8,
LineThickness = 2,
LineColor = majorLineColor
};
MainViewport.Children.Add(wireCrossVisual3D);
}
var polyLineVisual3D = new Ab3d.Visuals.PolyLineVisual3D()
{
LineColor = majorLineColor,
LineThickness = 2,
Transform = new TranslateTransform3D(startPosition.X, 1, startPosition.Z),
Positions = point3DCollection
};
MainViewport.Children.Add(polyLineVisual3D);
// Now add minor WireCrossVisual3D that will show how animation progresses through time
double framesPerSegment = (double)positionTrack.LastFrame / (double)segmentsCount;
Vector3D startPositionOffset = new Vector3D(startPosition.X, 0.8, startPosition.Z);
for (int i = 0; i <= segmentsCount; i++)
{
double frameNumber = i * framesPerSegment;
Point3D positionForFrame = positionTrack.GetPositionForFrame(frameNumber) + startPositionOffset;
var wireCrossVisual3D = new Ab3d.Visuals.WireCrossVisual3D()
{
Position = positionForFrame,
LineColor = minorLineColor,
LineThickness = 1,
LinesLength = 6
};
MainViewport.Children.Add(wireCrossVisual3D);
}
}
private void UpdatePositionCross()
{
double t = PositionSlider.Value / 100.0;
Point3D position;
// Get position on the curve defined by _controlPoints and _weights
// t is on interval from 0 to 1 - 0 meaning the first control point and 1 the last control point
if (_selectedCurveType == CurveType.BezierCurve || _selectedCurveType == CurveType.CurveThroughPoints)
{
position = _bezierCurve.GetPositionOnCurve(t);
}
else if (_selectedCurveType == CurveType.BSpline)
{
position = _bspline.GetPositionOnBSpline(t);
}
else
{
position = _bspline.GetPositionOnNURBSCurve(t);
}
if (_positionCross == null || !PositionsVisual.Children.Contains(_positionCross))
{
_positionCross = new Visuals.WireCrossVisual3D();
_positionCross.LineColor = Colors.Yellow;
_positionCross.LineThickness = 2;
_positionCross.LinesLength = 15;
_positionCross.Position = position;
PositionsVisual.Children.Add(_positionCross);
}
else
{
// Just update the position
_positionCross.Position = position;
}
PositionTextBlock.Text = string.Format(System.Globalization.CultureInfo.InvariantCulture, "Position on curve (t = {0:0.00})", t);
}
