public RenderContext()
{
for (int i = 0; i < 6; i++)
{
frustum[i] = new PlaneD(0,0,0,0);
}
}
//virtual public bool IsTileInFrustum(PlaneD[]frustum)
//{
// InViewFrustum = false;
// Vector3d center = sphereCenter;
// if (this.Level < 2 && dataset.Projection == ProjectionType.Mercator)
// {
// return true;
// }
// Vector4d centerV4 = new Vector4d(center.X , center.Y , center.Z , 1f);
// Vector3d length = Vector3d.Create(sphereRadius, 0, 0);
// double rad = length.Length();
// for (int i = 0; i < 6; i++)
// {
// if (frustum[i].Dot(centerV4) + rad < 0)
// {
// return false;
// }
// }
// InViewFrustum = true;
// return true;
//}
public virtual bool IsTileInFrustum(PlaneD[] frustum)
{
if (this.Level < 2 && (dataset.Projection == ProjectionType.Mercator || dataset.Projection == ProjectionType.Toast))
{
// return true;
}
InViewFrustum = false;
Vector4d centerV4 = new Vector4d(sphereCenter.X, sphereCenter.Y, sphereCenter.Z, 1f);
for (int i = 0; i < 6; i++)
{
if (frustum[i].Dot(centerV4) < -sphereRadius)
{
return false;
}
}
InViewFrustum = true;
return true;
}