private IPatchRenderer subTileRenderer; // renders partial tile, no extra detail.
#endregion Fields
#region Constructors
public QuadtreeLODRenderer(ITileRenderer fullTileDistant, ITileRenderer fullTileNear, IPatchRenderer subTile, IPatchRenderer subTileDetail)
: base()
{
this.fullTileDistantRenderer = fullTileDistant;
this.fullTileNearRenderer = fullTileNear;
this.subTileRenderer = subTile;
this.subTileDetailRenderer = subTileDetail;
this.DetailRadius = 8.0f;
this.DistantTileRadius = 512.0f;
}
public void Render(TerrainTile tile, TerrainGlobal terrainGlobal, Matrix4 projection, Matrix4 view, Vector3 eye, Vector3 reye, float detailRadius, IPatchRenderer tileRenderer, IPatchRenderer tileDetailRenderer)
{
// can we render this tile without subdividing?
// we can render now once we've got to a small enough tile
if (this.TileSize <= 8) //4
{
tileDetailRenderer.Width = GetDetailTileSize(reye, detailRadius);
tileDetailRenderer.Height = tileDetailRenderer.Width;
tileDetailRenderer.DetailScale = (float)this.TileSize / (float)tileDetailRenderer.Width;
tileDetailRenderer.Scale = (float)this.TileSize / (float)tile.Width;
tileDetailRenderer.Offset = (this.TopLeft.Position.Xz / (float)tile.Width);
tileDetailRenderer.Render(tile, terrainGlobal, projection, view, eye);
return;
}
if (!IsViewerInDetailRange(reye, detailRadius))
{
// we can if we're outside the detail radius
tileRenderer.Width = this.TileSize;
tileRenderer.Height = this.TileSize;
tileRenderer.Scale = (float)this.TileSize / (float)tile.Width;
tileRenderer.Offset = (this.TopLeft.Position.Xz / (float)tile.Width);
tileRenderer.Render(tile, terrainGlobal, projection, view, eye);
return;
}
// split into 4 - need centre pos
Vector3 centre = (TopLeft.Position + BottomRight.Position) * 0.5f;
// top left child
new QuadTreeNode()
{
TopLeft = this.TopLeft,
TopRight = new QuadTreeVertex() { Position = new Vector3(centre.X, 0f, this.TopLeft.Position.Z) },
BottomLeft = new QuadTreeVertex() { Position = new Vector3(this.TopLeft.Position.X, 0f, centre.Z) },
BottomRight = new QuadTreeVertex() { Position = centre },
TileSize = this.TileSize / 2
}.Render(tile, terrainGlobal, projection, view, eye, reye, detailRadius, tileRenderer, tileDetailRenderer);
// top right child
new QuadTreeNode()
{
TopLeft = new QuadTreeVertex() { Position = new Vector3(centre.X, 0f, this.TopRight.Position.Z) },
TopRight = this.TopRight,
BottomLeft = new QuadTreeVertex() { Position = centre },
BottomRight = new QuadTreeVertex() { Position = new Vector3(this.TopRight.Position.X, 0f, centre.Z) },
TileSize = this.TileSize / 2
}.Render(tile, terrainGlobal, projection, view, eye, reye, detailRadius, tileRenderer, tileDetailRenderer);
// bottom left child
new QuadTreeNode()
{
TopLeft = new QuadTreeVertex() { Position = new Vector3(this.BottomLeft.Position.X, 0f, centre.Z) },
TopRight = new QuadTreeVertex() { Position = centre },
BottomLeft = this.BottomLeft,
BottomRight = new QuadTreeVertex() { Position = new Vector3(centre.X, 0f, this.BottomLeft.Position.Z) },
TileSize = this.TileSize / 2
}.Render(tile, terrainGlobal, projection, view, eye, reye, detailRadius, tileRenderer, tileDetailRenderer);
// bottom right child
new QuadTreeNode()
{
TopLeft = new QuadTreeVertex() { Position = centre },
TopRight = new QuadTreeVertex() { Position = new Vector3(this.BottomRight.Position.X, 0f, centre.Z) },
BottomLeft = new QuadTreeVertex() { Position = new Vector3(centre.X, 0f, this.BottomRight.Position.Z) },
BottomRight = this.BottomRight,
TileSize = this.TileSize / 2
}.Render(tile, terrainGlobal, projection, view, eye, reye, detailRadius, tileRenderer, tileDetailRenderer);
}
