void UpdateRenderedSpriteInner(CPos cell, RendererCellContents content)
{
var density = content.Density;
var renderType = content.Type;
if (density > 0 && renderType != null)
{
// The call chain for this method (that starts with AddDirtyCell()) guarantees
// that the new content type would still be suitable for this renderer,
// but that is a bit too fragile to rely on in case the code starts changing.
if (!Info.RenderTypes.Contains(renderType.Info.Type))
{
return;
}
var clear = FindClearSides(renderType, cell);
int index;
if (clear == ClearSides.None)
{
var sprites = Variants[content.Variant];
var frame = density > ResourceLayer.GetMaxResourceDensity(cell) / 2 ? 1 : 0;
UpdateSpriteLayers(cell, renderType.Variants.First().Value, sprites[frame], renderType.Palette);
}
else if (SpriteMap.TryGetValue(clear, out index))
{
UpdateSpriteLayers(cell, renderType.Variants.First().Value, index, renderType.Palette);
}
else
{
throw new InvalidOperationException("SpriteMap does not contain an index for ClearSides type '{0}'".F(clear));
}
}
else
{
UpdateSpriteLayers(cell, null, 0, null);
}
}