public override TilePyramid VisibleTiles(GridRectangle VisibleBounds, double DownSample)
{
int roundedDownsample = NearestAvailableLevel(DownSample);
GridQuad VisibleQuad = null;
//Add any corners of the VisibleBounds that we can transform to the list of points
List<MappingGridVector2> VisiblePoints = VisibleBoundsCorners(VolumeTransform, VisibleBounds);
if (VisiblePoints.Count != 4)
{
//If we can't map all four corners then add all the points from the transform falling inside the visible rectangle or
//connected to those points by an edge
List<MappingGridVector2> listTransformPoints = this.VolumeTransform.IntersectingControlRectangle(VisibleBounds, true);
VisiblePoints.AddRange(listTransformPoints);
}
else
{
VisiblePoints.Sort(new MappingGridVector2SortByMapPoints());
VisibleQuad = new GridQuad(VisiblePoints[0].MappedPoint,
VisiblePoints[1].MappedPoint,
VisiblePoints[2].MappedPoint,
VisiblePoints[3].MappedPoint);
}
//OK, transform all points falling inside the section border
//Starting with low-res tiles, add tiles to the list until we reach desired resolution
//List<Tile> TilesToDraw = new List<Tile>();
TilePyramid TilesToDraw = new TilePyramid(VisibleBounds);
if (VisiblePoints.Count < 3)
return TilesToDraw;
GridRectangle SectionBorder = MappingGridVector2.CalculateMappedBounds(VisiblePoints.ToArray());
int iLevel = AvailableLevels.Length - 1;
int level = AvailableLevels[iLevel];
do
{
List<Tile> newTiles = RecursiveVisibleTiles(VisibleBounds,
SectionBorder,
VisibleQuad,
level
//PORT: AsynchTextureLoad
);
//Insert at the beginning so we overwrite earlier tiles with poorer resolution
TilesToDraw.AddTiles(level, newTiles.ToArray());
iLevel--;
if (iLevel >= 0)
level = AvailableLevels[iLevel];
}
while (level >= roundedDownsample && iLevel >= 0);
// Trace.WriteLine("Drawing " + TilesToDraw.Count.ToString() + " Tiles", "VolumeModel");
return TilesToDraw;
}
public override TilePyramid VisibleTiles(GridRectangle VisibleBounds, double DownSample)
{
TilePyramid VisibleTiles = new TilePyramid(VisibleBounds);
int roundedDownsample = NearestAvailableLevel(DownSample);
//Starting with low-res tiles, add tiles to the list until we reach desired resolution
// List<Tile> TilesToDraw = new List<Tile>();
//Find the starting level of our rendering
int iLevel = AvailableLevels.Length - 1;
int level = AvailableLevels[iLevel];
do
{
List<Tile> newTiles = RecursiveVisibleTiles(
VisibleBounds,
level
//PORT: AsynchTextureLoad
);
//Insert at the beginning so we overwrite earlier tiles with poorer resolution
VisibleTiles.AddTiles(level, newTiles);
//TilesToDraw.AddRange(newTiles);
iLevel--;
if(iLevel >= 0)
level = AvailableLevels[iLevel];
}
while (level >= roundedDownsample && iLevel >= 0);
//Trace.WriteLine("Drawing " + TilesToDraw.Count.ToString() + " Tiles", "VolumeModel");
return VisibleTiles;
}