public WorldSurfaceRenderer(uint samplesPerTile, double distanceAboveSeaLevel, World parentWorld)
{
m_SamplesPerTile = samplesPerTile;
m_ParentWorld = parentWorld;
m_DistanceAboveSeaLevel = distanceAboveSeaLevel;
double tileSize = 180.0f/m_NumberRootTilesHigh;
m_RootSurfaceTiles = new SurfaceTile[m_NumberRootTilesHigh*(m_NumberRootTilesHigh*2)];
for (int i = 0; i < m_NumberRootTilesHigh; i++) {
for (int j = 0; j < m_NumberRootTilesHigh*2; j++) {
m_RootSurfaceTiles[i*m_NumberRootTilesHigh*2 + j] = new SurfaceTile((i + 1)*tileSize - 90.0f, i*tileSize - 90.0f, j*tileSize - 180.0f, (j + 1)*tileSize - 180.0f, 0, this);
}
}
}
/// <summary>
/// Updates the specified draw args.
/// </summary>
/// <param name="drawArgs">Draw args.</param>
public void Update(DrawArgs drawArgs)
{
try {
if (!m_Initialized) {
Initialize(drawArgs);
}
float scaleFactor = 1f/(m_ParentWorldSurfaceRenderer.SamplesPerTile);
float latrange = (float) Math.Abs(m_North - m_South);
float lonrange = (float) Math.Abs(m_East - m_West);
int thisVertexDensityElevatedPlus3 = ((int) m_ParentWorldSurfaceRenderer.SamplesPerTile/2 + 3);
scaleFactor = (float) 1/(m_ParentWorldSurfaceRenderer.SamplesPerTile);
latrange = (float) Math.Abs(m_North - m_South);
lonrange = (float) Math.Abs(m_East - m_West);
double centerLatitude = 0.5*(m_North + m_South);
double centerLongitude = 0.5*(m_East + m_West);
double tileSize = (m_North - m_South);
if (m_VerticalExaggeration != World.Settings.VerticalExaggeration) {
// buildTerrainMesh();
}
if (drawArgs.WorldCamera.TrueViewRange < Angle.FromDegrees(3.0f*tileSize) && MathEngine.SphericalDistance(Angle.FromDegrees(centerLatitude), Angle.FromDegrees(centerLongitude), drawArgs.WorldCamera.Latitude, drawArgs.WorldCamera.Longitude) < Angle.FromDegrees(2.9f*tileSize)
&& drawArgs.WorldCamera.ViewFrustum.Intersects(m_BoundingBox)) {
if (m_NorthWestChild == null || m_NorthEastChild == null || m_SouthWestChild == null
|| m_SouthEastChild == null) {
ComputeChildrenTiles(drawArgs);
}
else {
if (m_NorthEastChild != null) {
m_NorthEastChild.Update(drawArgs);
}
if (m_NorthWestChild != null) {
m_NorthWestChild.Update(drawArgs);
}
if (m_SouthEastChild != null) {
m_SouthEastChild.Update(drawArgs);
}
if (m_SouthWestChild != null) {
m_SouthWestChild.Update(drawArgs);
}
}
}
else {
if (m_NorthWestChild != null) {
m_NorthWestChild.Dispose();
m_NorthWestChild = null;
}
if (m_NorthEastChild != null) {
m_NorthEastChild.Dispose();
m_NorthEastChild = null;
}
if (m_SouthEastChild != null) {
m_SouthEastChild.Dispose();
m_SouthEastChild = null;
}
if (m_SouthWestChild != null) {
m_SouthWestChild.Dispose();
m_SouthWestChild = null;
}
}
}
catch (ThreadAbortException) {}
catch (Exception ex) {
Log.Write(ex);
}
}
private void ComputeChildrenTiles(DrawArgs drawArgs)
{
if (m_NorthWestChild == null) {
SurfaceTile nwc = new SurfaceTile(m_North, 0.5f*(m_South + m_North), m_West, 0.5f*(m_West + m_East), m_Level + 1, m_ParentWorldSurfaceRenderer);
nwc.Initialize(drawArgs);
m_NorthWestChild = nwc;
}
if (m_NorthEastChild == null) {
SurfaceTile nec = new SurfaceTile(m_North, 0.5f*(m_South + m_North), 0.5f*(m_West + m_East), m_East, m_Level + 1, m_ParentWorldSurfaceRenderer);
nec.Initialize(drawArgs);
m_NorthEastChild = nec;
}
if (m_SouthWestChild == null) {
SurfaceTile swc = new SurfaceTile(0.5f*(m_South + m_North), m_South, m_West, 0.5f*(m_West + m_East), m_Level + 1, m_ParentWorldSurfaceRenderer);
swc.Initialize(drawArgs);
m_SouthWestChild = swc;
}
if (m_SouthEastChild == null) {
SurfaceTile sec = new SurfaceTile(0.5f*(m_South + m_North), m_South, 0.5f*(m_West + m_East), m_East, m_Level + 1, m_ParentWorldSurfaceRenderer);
sec.Initialize(drawArgs);
m_SouthEastChild = sec;
}
}
/// <summary>
/// Disposes this instance. Releases any resources from the graphics device, also disposes of "child" surface tiles.
/// </summary>
public void Dispose()
{
m_Initialized = false;
m_BoundingBox = null;
if (m_Device != null) {
m_Device.DeviceReset -= new EventHandler(OnDeviceReset);
m_Device.Disposing -= new EventHandler(OnDeviceDispose);
OnDeviceDispose(m_Device, null);
}
if (m_NorthWestChild != null) {
m_NorthWestChild.Dispose();
m_NorthWestChild = null;
}
if (m_NorthEastChild != null) {
m_NorthEastChild.Dispose();
m_NorthEastChild = null;
}
if (m_SouthWestChild != null) {
m_SouthWestChild.Dispose();
m_SouthWestChild = null;
}
if (m_SouthEastChild != null) {
m_SouthEastChild.Dispose();
m_SouthEastChild = null;
}
}
