public void AddFrustum(BoundingFrustumEx frustum, short timer, Color color)
{
Vector3[] corners = frustum.GetCornersNoCopy();
//Front
Lines.Add(new LineHelper(corners[0], corners[1], 1, color, color, this));
Lines.Add(new LineHelper(corners[1], corners[2], 1, color, color, this));
Lines.Add(new LineHelper(corners[2], corners[3], 1, color, color, this));
Lines.Add(new LineHelper(corners[3], corners[0], 1, color, color, this));
//Back
Lines.Add(new LineHelper(corners[4], corners[5], 1, color, color, this));
Lines.Add(new LineHelper(corners[5], corners[6], 1, color, color, this));
Lines.Add(new LineHelper(corners[6], corners[7], 1, color, color, this));
Lines.Add(new LineHelper(corners[7], corners[4], 1, color, color, this));
//Between
Lines.Add(new LineHelper(corners[4], corners[0], 1, color, color, this));
Lines.Add(new LineHelper(corners[5], corners[1], 1, color, color, this));
Lines.Add(new LineHelper(corners[6], corners[2], 1, color, color, this));
Lines.Add(new LineHelper(corners[7], corners[3], 1, color, color, this));
}
private void TiledLighting(BoundingFrustum frustum, List <PointLight> pointLights, int cols, int rows)
{
if (TiledList == null || TiledList.Length != cols * rows)
{
TiledList = new int[cols * rows][];
TiledListLength = new float[cols * rows];
for (var index = 0; index < TiledList.Length; index++)
{
TiledList[index] = new int[MAXLIGHTSPERTILE];
}
}
if (_tileFrustum == null)
{
_tileFrustum = new BoundingFrustumEx(frustum.Matrix);
}
Vector3[] mainfrustumCorners = frustum.GetCorners();
for (float col = 0; col < cols; col++)
{
for (float row = 0; row < rows; row++)
{
//top left
_tileFrustumCorners[0] = mainfrustumCorners[0]
+ (mainfrustumCorners[1] - mainfrustumCorners[0]) * col / cols
+ (mainfrustumCorners[3] - mainfrustumCorners[0]) * row / rows;
//top right
_tileFrustumCorners[1] = mainfrustumCorners[0]
+ (mainfrustumCorners[1] - mainfrustumCorners[0]) * (col + 1) / cols
+ (mainfrustumCorners[3] - mainfrustumCorners[0]) * row / rows;
//bot right
_tileFrustumCorners[2] = mainfrustumCorners[0]
+ (mainfrustumCorners[1] - mainfrustumCorners[0]) * (col + 1) / cols
+ (mainfrustumCorners[2] - mainfrustumCorners[1]) * (row + 1) / rows;
//bot left
_tileFrustumCorners[3] = mainfrustumCorners[0]
+ (mainfrustumCorners[1] - mainfrustumCorners[0]) * (col) / cols
+ (mainfrustumCorners[2] - mainfrustumCorners[1]) * (row + 1) / rows;
_tileFrustumCorners[4] = mainfrustumCorners[4]
+ (mainfrustumCorners[5] - mainfrustumCorners[4]) * col / cols
+ (mainfrustumCorners[7] - mainfrustumCorners[4]) * row / rows;
_tileFrustumCorners[5] = mainfrustumCorners[4]
+ (mainfrustumCorners[5] - mainfrustumCorners[4]) * (col + 1) / cols
+ (mainfrustumCorners[7] - mainfrustumCorners[4]) * row / rows;
_tileFrustumCorners[6] = mainfrustumCorners[4]
+ (mainfrustumCorners[5] - mainfrustumCorners[4]) * (col + 1) / cols
+ (mainfrustumCorners[6] - mainfrustumCorners[5]) * (row + 1) / rows;
_tileFrustumCorners[7] = mainfrustumCorners[4]
+ (mainfrustumCorners[5] - mainfrustumCorners[4]) * (col) / cols
+ (mainfrustumCorners[6] - mainfrustumCorners[5]) * (row + 1) / rows;
_tileFrustum.SetCorners(ref _tileFrustumCorners);
_tileFrustum.CreatePlanesFromCorners();
//Now we are ready to frustum cull... phew
int index = (int)(row * cols + col);
int numberOfLightsInTile = 0;
for (var i = 0; i < pointLights.Count; i++)
{
var pointLight = pointLights[i];
ContainmentType containmentType = _tileFrustum.Contains(pointLight.BoundingSphere);
if (containmentType == ContainmentType.Intersects ||
containmentType == ContainmentType.Contains)
{
TiledList[index][numberOfLightsInTile] = i;
numberOfLightsInTile++;
}
if (numberOfLightsInTile >= MAXLIGHTSPERTILE)
{
break;
}
}
TiledListLength[index] = numberOfLightsInTile;
#if SHOWTILES
LineHelperManager.AddFrustum(_tileFrustum, 1, numberOfLightsInTile > 1 ? Color.Red : numberOfLightsInTile > 0 ? Color.Blue : Color.Green);
#endif
}
}
//Note: This needs a custom monogame version, since the default doesn't like to pass int[];
_tiledListLengthParam.SetValue(TiledListLength);
}
