public void DrawMe(Graphics g)
{
PointF boundingBoxTopLeft = new PointF((float)_parentPositionDB.AbsolutePosition.X * _camera.ZoomLevel, (float)_parentPositionDB.AbsolutePosition.Y * _camera.ZoomLevel);
PointF bodyPos = new PointF((float)_bodyPositionDB.AbsolutePosition.X * _camera.ZoomLevel, (float)_bodyPositionDB.AbsolutePosition.Y * _camera.ZoomLevel);
SizeF elipseSize = new SizeF(_orbitElipseWidth * _camera.ZoomLevel, _orbitElipseHeight * _camera.ZoomLevel);
RectangleF elipseBoundingBox = new RectangleF(boundingBoxTopLeft, elipseSize);
g.SaveTransform();
var rmatrix = Matrix.Create();
//the distance between the center of the bounding rectangle, and one of the elipse's focal points
float focalpoint = (float)_focalDistance * _camera.ZoomLevel;
float halfWid = _orbitElipseWidth * 0.5f * _camera.ZoomLevel;
float halfHei = _orbitElipseHeight * 0.5f * _camera.ZoomLevel;
PointF focalOffset = new PointF(-halfWid - focalpoint, -halfHei);
//get the offset from the camera, accounting for zoom, pan etc.
IMatrix cameraOffset = _camera.GetViewProjectionMatrix(new PointF(0, 0));
//apply the camera offset
g.MultiplyTransform(cameraOffset);
//debug line, draws from the parent body to the body.
//if (myEntity.GetDataBlob<NameDB>().DefaultName == "Luna" || myEntity.GetDataBlob<NameDB>().DefaultName == "Earth")
// g.DrawLine(Colors.DeepPink, boundingBoxTopLeft, bodyPos);
float startArcAngle = GetStartArcAngle();
g.TranslateTransform(focalOffset);
// this point is from the frame of reference of the elipse.
PointF rotatePoint = new PointF(halfWid + focalpoint, halfHei) + boundingBoxTopLeft;
rmatrix.RotateAt(_orbitAngle, rotatePoint);
g.MultiplyTransform(rmatrix);
//if (myEntity.GetDataBlob<NameDB>().DefaultName == "Mercury")
// g.DrawLine(Colors.DeepPink, (boundingBoxTopLeft + elipseSize) / 2, focalOffset - bodyPos );
//debug rectangle, draws the bounding box for the rotated elipse
//if (myEntity.GetDataBlob<NameDB>().DefaultName == "Mercury" || myEntity.GetDataBlob<NameDB>().DefaultName == "Earth")
// g.DrawRectangle(Colors.BlueViolet, elipseBoundingBox);
//draw the elipse (as a number of arcs each with a different pen, this gives the fading alpha channel effect)
int i = 0;
foreach (var pen in _segmentPens)
{
g.DrawArc(pen, elipseBoundingBox, startArcAngle - (i * SweepAngle), -SweepAngle);
i++;
}
g.RestoreTransform();
}
/// <summary>
/// Draws the Name of the Item
/// </summary>
/// <param name="g"></param>
public void DrawMe(Graphics g)
{
g.SaveTransform();
IMatrix cameraOffset = _camera.GetViewProjectionMatrix(new PointF((float)worldPosition.X, (float)worldPosition.Y));
g.MultiplyTransform(cameraOffset);
g.TranslateTransform(ViewOffset);
g.DrawText(font, color, (float)worldPosition.X, (float)worldPosition.Y, name);
g.RestoreTransform();
}