/// <summary>
/// Adds an IViewer to this grid.
/// </summary>
/// <param name="viewerToAdd">The viewer to add.</param>
public void AddViewer(IViewer viewerToAdd)
{
int localGridDimension = MathFunctions.RoundToInt(viewerToAdd.WorldViewRadius / mGridSpacing) * 2 + 1;
VisibilityGrid localVisibilityGrid = new VisibilityGrid(0, 0, mGridSpacing,
localGridDimension, localGridDimension);
ViewerInformation viewerInformation = new ViewerInformation();
viewerInformation.LocalVisibilityGrid = localVisibilityGrid;
if (mFogFactor > 0)
{
localVisibilityGrid.FogColor = FogColor;
localVisibilityGrid.FogShade = FogShade;
localVisibilityGrid.FogResolution = FogResolution;
}
int xIndex;
int yIndex;
mViewers.Add(viewerToAdd, viewerInformation);
WorldToIndex(viewerToAdd.X, viewerToAdd.Y, out xIndex, out yIndex);
int radiusAsInt = MathFunctions.RoundToInt(viewerToAdd.WorldViewRadius / mGridSpacing);
if (xIndex >= radiusAsInt && yIndex >= radiusAsInt &&
xIndex + radiusAsInt < mNumberOfXTiles && yIndex + radiusAsInt < mNumberOfYTiles)
{
UpdateViewersLocalVisibilityGrid(viewerToAdd, viewerInformation);
}
UpdateRevealedFromViewers();
}
private void UpdateRevealedFromViewers()
{
MakeAllHidden();
int x;
int y;
int xIndex;
int yIndex;
int radiusAsInt;
foreach (KeyValuePair <IViewer, ViewerInformation> kvp in mViewers)
{
IViewer viewer = kvp.Key;
WorldToIndex(viewer.X, viewer.Y, out xIndex, out yIndex);
radiusAsInt = MathFunctions.RoundToInt(viewer.WorldViewRadius / mGridSpacing);
if (xIndex >= radiusAsInt && yIndex >= radiusAsInt &&
xIndex + radiusAsInt < mNumberOfXTiles && yIndex + radiusAsInt < mNumberOfYTiles)
{
ViewerInformation info = kvp.Value;
VisibilityGrid gridToPlace = info.LocalVisibilityGrid;
int xOffset = MathFunctions.RoundToInt((gridToPlace.mXSeed - mXSeed) / mGridSpacing);
int yOffset = MathFunctions.RoundToInt((gridToPlace.mYSeed - mYSeed) / mGridSpacing);
int fogX, fogY;
Color sourceColor;
Color destinationColor;
for (x = 0; x < gridToPlace.mNumberOfXTiles; x++)
{
for (y = 0; y < gridToPlace.mNumberOfYTiles; y++)
{
mRevealedTiles[x + xOffset][y + yOffset] |= gridToPlace.mRevealedTiles[x][y];
if (mFogFactor > 0)
{
for (fogX = 0; fogX < mFogFactor; fogX++)
{
for (fogY = 0; fogY < mFogFactor; fogY++)
{
sourceColor = gridToPlace.mFogImageData.GetPixelColor(x * mFogFactor + fogX, y * mFogFactor + fogY);
destinationColor = mFogImageData.GetPixelColor((x + xOffset) * mFogFactor + fogX, (y + yOffset) * mFogFactor + fogY);
if (sourceColor.R > destinationColor.R)
{
destinationColor = sourceColor;
}
mFogImageData.SetPixel((x + xOffset) * mFogFactor + fogX, (y + yOffset) * mFogFactor + fogY, destinationColor);
}
}
}
}
}
}
}
if (mFogFactor > 0 && mFogTexture != null)
{
mFogImageData.ToTexture2D(mFogTexture);
}
}
/// <summary>
/// Returns whether a given world position is in view of a given viewer.
/// </summary>
/// <param name="viewer">The viewer to check visibility for.</param>
/// <param name="targetPosition">The world coordinates.</param>
/// <returns>Whether in view.</returns>
public bool IsPositionInDirectView(IViewer viewer, ref Vector3 targetPosition)
{
if (mViewers.ContainsKey(viewer))
{
VisibilityGrid grid = mViewers[viewer].LocalVisibilityGrid;
return(grid.IsRevealedWorld(targetPosition.X, targetPosition.Y));
}
#if DEBUG
else
{
throw new InvalidOperationException("Viewer does not exist in Visbility grid");
}
#else
return(false);
#endif
}
/// <summary>
/// Adds an IViewer to this grid.
/// </summary>
/// <param name="viewerToAdd">The viewer to add.</param>
public void AddViewer(IViewer viewerToAdd)
{
int localGridDimension = MathFunctions.RoundToInt(viewerToAdd.WorldViewRadius / mGridSpacing) * 2 + 1;
VisibilityGrid localVisibilityGrid = new VisibilityGrid(0, 0, mGridSpacing,
localGridDimension, localGridDimension);
ViewerInformation viewerInformation = new ViewerInformation();
viewerInformation.LocalVisibilityGrid = localVisibilityGrid;
if (mFogFactor > 0)
{
localVisibilityGrid.FogColor = FogColor;
localVisibilityGrid.FogShade = FogShade;
localVisibilityGrid.FogResolution = FogResolution;
}
int xIndex;
int yIndex;
mViewers.Add(viewerToAdd, viewerInformation);
WorldToIndex(viewerToAdd.X, viewerToAdd.Y, out xIndex, out yIndex);
int radiusAsInt = MathFunctions.RoundToInt(viewerToAdd.WorldViewRadius / mGridSpacing);
if (xIndex >= radiusAsInt && yIndex >= radiusAsInt &&
xIndex + radiusAsInt < mNumberOfXTiles && yIndex + radiusAsInt < mNumberOfYTiles)
{
UpdateViewersLocalVisibilityGrid(viewerToAdd, viewerInformation);
}
UpdateRevealedFromViewers();
}
private void UpdateViewersLocalVisibilityGrid(IViewer viewer, ViewerInformation viewerInformation)
{
VisibilityGrid localGrid = viewerInformation.LocalVisibilityGrid;
localGrid.MakeAllHidden();
localGrid.ClearBlockedTiles();
int viewRadius = MathFunctions.RoundToInt(viewer.WorldViewRadius / mGridSpacing);
int xIndex;
int yIndex;
WorldToIndex(viewer.X, viewer.Y, out xIndex, out yIndex);
float tileCenteredXPosition;
float tileCenteredYPosition;
IndexToWorld(xIndex, yIndex, out tileCenteredXPosition, out tileCenteredYPosition);
viewerInformation.LastX = xIndex;
viewerInformation.LastY = yIndex;
localGrid.mXSeed =
tileCenteredXPosition - viewer.WorldViewRadius;
localGrid.mYSeed =
tileCenteredYPosition - viewer.WorldViewRadius;
int xOffset = MathFunctions.RoundToInt((localGrid.mXSeed - mXSeed) / mGridSpacing);
int yOffset = MathFunctions.RoundToInt((localGrid.mYSeed - mYSeed) / mGridSpacing);
// copy over the blocked areas to the viewer
int y;
int fogX, fogY;
byte shadedValue;
Color shadedColor;
float invertedFogFactor = 1.0f;
if (mFogFactor > 1)
{
invertedFogFactor = 1.0f / mFogFactor;
}
for (int x = 0; x < localGrid.mNumberOfXTiles; x++)
{
for (y = 0; y < localGrid.mNumberOfYTiles; y++)
{
localGrid.mBlockedTiles[x][y] = mBlockedTiles[x + xOffset][y + yOffset];
}
}
localGrid.MakeAllHidden();
localGrid.RevealCircle(viewRadius, viewRadius, viewRadius);
localGrid.BleedDirectlyVisibleToWalls();
if (mFogFactor > 0)
{
for (int x = 0; x < localGrid.mNumberOfXTiles; x++)
{
for (y = 0; y < localGrid.mNumberOfYTiles; y++)
{
for (fogX = 0; fogX < mFogFactor; fogX++)
{
for (fogY = 0; fogY < mFogFactor; fogY++)
{
shadedColor = localGrid.mFogImageData.GetPixelColor(x * mFogFactor + fogX, y * mFogFactor + fogY);
shadedValue = 0;
if (localGrid.mRevealedTiles[x][y] != 0)
{
shadedValue = localGrid.CalculateFogColorByDistance(x + (fogX * invertedFogFactor), y + (fogY * invertedFogFactor), shadedColor.R, viewer);
}
else if (shadedColor.R > FogShade)
{
shadedValue = FogShade;
}
//shadedColor = Color.FromNonPremultiplied(FogColor.R, FogColor.G, FogColor.B, shadedValue);
shadedColor = Color.FromNonPremultiplied(shadedValue, shadedValue, shadedValue, 255);
localGrid.mFogImageData.SetPixel(x * mFogFactor + fogX, y * mFogFactor + fogY, shadedColor);
}
}
}
}
}
}