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);
}
}
}
}
}
}
