private void ComputeDisplayParametersForThumbnail()
{
if (currentConstellation == "Error")
{
return;
}
IPlace target = Constellations.ConstellationCentroids[currentConstellation];
Lineset boundries = Constellations.boundries[currentConstellation];
Vector3[] points = new Vector3[boundries.Points.Count];
Vector3[] pointsOut = new Vector3[boundries.Points.Count];
for (int i = 0; i < points.Length; i++)
{
points[i] = Coordinates.GeoTo3d(boundries.Points[i].Dec, boundries.Points[i].RA);
}
Matrix mat = Matrix.RotationY((float)(-(24 - (target.RA + 6)) / 12 * Math.PI));
mat = Matrix.Multiply(mat, Matrix.RotationX((float)(target.Lat / 180f * Math.PI)));
mat = Matrix.Multiply(mat, Matrix.Scaling(50, -50, 50));
mat = Matrix.Multiply(mat, Matrix.Translation(48, 22, 0));
// mat.Translate(58, 33,0);
Vector3.TransformCoordinate(points, ref mat, pointsOut);
lines = new PointF[points.Length + 1];
int index = 0;
foreach (Vector3 point in pointsOut)
{
lines[index++] = new PointF((float)point.X, (float)point.Y);
}
lines[index] = lines[0];
}
public void SetViewRect(Coordinates[] corners)
{
if (corners.Length != 4)
{
return;
}
if (string.IsNullOrEmpty(currentConstellation))
{
return;
}
bool change = false;
if (this.corners != null)
{
for (int i = 0; i < 4; i++)
{
if (this.corners[i] != corners[i])
{
change = true;
break;
}
}
}
else
{
change = true;
}
if (!change)
{
return;
}
this.corners = corners;
IPlace target = Constellations.ConstellationCentroids[currentConstellation];
Vector3[] points = new Vector3[4];
Vector3[] pointsOut = new Vector3[4];
for (int i = 0; i < 4; i++)
{
points[i] = Coordinates.GeoTo3d(this.corners[i].Dec, ((this.corners[i].RA / 24.0 * 360) - 180));
}
Matrix mat = Matrix.RotationY((float)(-(24 - (target.RA + 6)) / 12 * Math.PI));
mat = Matrix.Multiply(mat, Matrix.RotationX((float)(target.Lat / 180f * Math.PI)));
mat = Matrix.Multiply(mat, Matrix.Scaling(60, -60, 60));
mat = Matrix.Multiply(mat, Matrix.Translation(58, 33, 0));
Vector3.TransformCoordinate(points, ref mat, pointsOut);
fov = new PointF[5];
int index = 0;
foreach (Vector3 point in pointsOut)
{
fov[index++] = new PointF((float)point.X, (float)point.Y);
}
fov[4] = fov[0];
//Calculate view length
double a = fov[0].X - fov[1].X;
double b = fov[0].Y - fov[1].Y;
double c = Math.Sqrt(a * a + b * b);
RefreshHint();
}