private static void CreateWaterFaces(Voxel voxel,
VoxelChunk chunk,
int x, int y, int z,
ExtendedVertex[] vertices,
int startVertex)
{
// Reset the appropriate parts of the cache.
cache.Reset();
// These are reused for every face.
Vector3 origin = chunk.Origin + new Vector3(x, y, z);
int index = chunk.Data.IndexAt(x, y, z);
float centerWaterlevel = chunk.Data.Water[chunk.Data.IndexAt(x, y, z)].WaterLevel;
for (int faces = 0; faces < cache.drawFace.Length; faces++)
{
if (!cache.drawFace[faces])
{
continue;
}
BoxFace face = (BoxFace)faces;
// Let's get the vertex/index positions for the current face.
int idx = 0;
int vertexCount = 0;
int vertOffset = 0;
int numVerts = 0;
primitive.GetFace(face, primitive.UVs, out idx, out vertexCount, out vertOffset, out numVerts);
for (int i = 0; i < vertexCount; i++)
{
// Used twice so we'll store it for later use.
int primitiveIndex = primitive.Indexes[i + idx];
VoxelVertex currentVertex = primitive.Deltas[primitiveIndex];
// These two will be filled out before being used.
float foaminess;
Vector3 pos;
// We are going to have to reuse some vertices when drawing a single so we'll store the position/foaminess
// for quick lookup when we find one of those reused ones.
// When drawing multiple faces the Vertex overlap gets bigger, which is a bonus.
if (!cache.vertexCalculated[(int)currentVertex])
{
float count = 1.0f;
float emptyNeighbors = 0.0f;
float averageWaterLevel = centerWaterlevel;
List <Vector3> vertexSucc = VoxelChunk.VertexSuccessors[currentVertex];
// Run through the successors and count up the water in each voxel.
for (int v = 0; v < vertexSucc.Count; v++)
{
Vector3 succ = vertexSucc[v];
// We are going to use a lookup key so calculate it now.
int key = VoxelChunk.SuccessorToEuclidianLookupKey(succ);
// If we haven't gotten this Voxel yet then retrieve it.
// This allows us to only get a particular voxel once a function call instead of once per vertexCount/per face.
if (!cache.retrievedNeighbors[key])
{
Voxel neighbor = cache.neighbors[key];
cache.validNeighbors[key] = voxel.GetNeighborBySuccessor(succ, ref neighbor, false);
cache.retrievedNeighbors[key] = true;
}
// Only continue if it's a valid (non-null) voxel.
if (!cache.validNeighbors[key])
{
continue;
}
// Now actually do the math.
Voxel vox = cache.neighbors[key];
averageWaterLevel += vox.WaterLevel;
count++;
if (vox.WaterLevel < 1)
{
emptyNeighbors++;
}
}
averageWaterLevel = averageWaterLevel / count;
float averageWaterHeight = averageWaterLevel / WaterManager.maxWaterLevel;
foaminess = emptyNeighbors / count;
if (foaminess <= 0.5f)
{
foaminess = 0.0f;
}
pos = primitive.Vertices[primitiveIndex].Position;
pos.Y *= averageWaterHeight;
pos += origin;
// Store the vertex information for future use when we need it again on this or another face.
cache.vertexCalculated[(int)currentVertex] = true;
cache.vertexFoaminess[(int)currentVertex] = foaminess;
cache.vertexPositions[(int)currentVertex] = pos;
}
else
{
// We've already calculated this one. Time for a cheap grab from the lookup.
foaminess = cache.vertexFoaminess[(int)currentVertex];
pos = cache.vertexPositions[(int)currentVertex];
}
switch (face)
{
case BoxFace.Back:
case BoxFace.Front:
vertices[i + startVertex].Set(pos,
new Color(foaminess, 0.0f, 1.0f, 1.0f),
Color.White,
new Vector2(pos.X, pos.Y),
new Vector4(0, 0, 1, 1));
break;
case BoxFace.Right:
case BoxFace.Left:
vertices[i + startVertex].Set(pos,
new Color(foaminess, 0.0f, 1.0f, 1.0f),
Color.White,
new Vector2(pos.Z, pos.Y),
new Vector4(0, 0, 1, 1));
break;
case BoxFace.Top:
vertices[i + startVertex].Set(pos,
new Color(foaminess, 0.0f, 1.0f, 1.0f),
Color.White,
new Vector2(pos.X, pos.Z),
new Vector4(0, 0, 1, 1));
break;
}
}
startVertex += 6;
}
}
// This will loop through the whole world and draw out all liquid primatives that are handed to the function.
public static void InitializePrimativesFromChunk(VoxelChunk chunk, List <LiquidPrimitive> primitivesToInit)
{
LiquidPrimitive[] lps = new LiquidPrimitive[(int)LiquidType.Count];
// We are going to first set up the internal array.
foreach (LiquidPrimitive lp in primitivesToInit)
{
if (lp != null)
{
lps[(int)lp.LiqType] = lp;
}
}
// We are going to lock around the IsBuilding check/set to avoid the situation where two threads could both pass through
// if they both checked IsBuilding at the same time before either of them set IsBuilding.
lock (caches)
{
// We check all parts of the array before setting any to avoid somehow setting a few then leaving before we can unset them.
for (int i = 0; i < lps.Length; i++)
{
if (lps[i] != null && lps[i].IsBuilding)
{
return;
}
}
// Now we know we are safe so we can set IsBuilding.
for (int i = 0; i < lps.Length; i++)
{
if (lps[i] != null)
{
lps[i].IsBuilding = true;
}
}
// Now we have to get a valid cache object.
bool cacheSet = false;
for (int i = 0; i < caches.Count; i++)
{
if (!caches[i].inUse)
{
cache = caches[i];
cache.inUse = true;
cacheSet = true;
}
}
if (!cacheSet)
{
cache = new LiquidRebuildCache();
cache.inUse = true;
caches.Add(cache);
}
}
LiquidType curLiqType = LiquidType.None;
LiquidPrimitive curPrimative = null;
ExtendedVertex[] curVertices = null;
int[] maxVertices = new int[lps.Length];
int maxY = (int)Math.Min(chunk.Manager.ChunkData.MaxViewingLevel + 1, chunk.SizeY);
Voxel myVoxel = chunk.MakeVoxel(0, 0, 0);
Voxel vox = chunk.MakeVoxel(0, 0, 0);
int maxVertex = 0;
bool fogOfWar = GameSettings.Default.FogofWar;
for (int x = 0; x < chunk.SizeX; x++)
{
for (int y = 0; y < maxY; y++)
{
for (int z = 0; z < chunk.SizeZ; z++)
{
int index = chunk.Data.IndexAt(x, y, z);
if (fogOfWar && !chunk.Data.IsExplored[index])
{
continue;
}
if (chunk.Data.Water[index].WaterLevel > 0)
{
LiquidType liqType = chunk.Data.Water[index].Type;
// We need to see if we changed types and should change the data we are writing to.
if (liqType != curLiqType)
{
LiquidPrimitive newPrimitive = lps[(int)liqType];
// We weren't passed a LiquidPrimitive object to work with for this type so we'll skip it.
if (newPrimitive == null)
{
continue;
}
maxVertices[(int)curLiqType] = maxVertex;
curVertices = newPrimitive.Vertices;
curLiqType = liqType;
curPrimative = newPrimitive;
maxVertex = maxVertices[(int)liqType];
}
myVoxel.GridPosition = new Vector3(x, y, z);
int facesToDraw = 0;
for (int i = 0; i < 6; i++)
{
BoxFace face = (BoxFace)i;
// We won't draw the bottom face. This might be needed down the line if we add transparent tiles like glass.
if (face == BoxFace.Bottom)
{
continue;
}
Vector3 delta = faceDeltas[(int)face];
// Pull the current neighbor Voxel based on the face it would be touching.
bool success = myVoxel.GetNeighborBySuccessor(delta, ref vox, false);
if (success)
{
if (face == BoxFace.Top)
{
if (!(vox.WaterLevel == 0 || y == (int)chunk.Manager.ChunkData.MaxViewingLevel))
{
cache.drawFace[(int)face] = false;
continue;
}
}
else
{
if (vox.WaterLevel != 0 || !vox.IsEmpty)
{
cache.drawFace[(int)face] = false;
continue;
}
}
}
cache.drawFace[(int)face] = true;
facesToDraw++;
}
// There's no faces to draw on this voxel. Let's go to the next one.
if (facesToDraw == 0)
{
continue;
}
// Now we check to see if we need to resize the current Vertex array.
int vertexSizeIncrease = facesToDraw * 6;
if (curVertices == null)
{
curVertices = new ExtendedVertex[256];
curPrimative.Vertices = curVertices;
}
else if (curVertices.Length <= maxVertex + vertexSizeIncrease)
{
ExtendedVertex[] newVerts = new ExtendedVertex[curVertices.Length * 2];
curVertices.CopyTo(newVerts, 0);
curVertices = newVerts;
curPrimative.Vertices = curVertices;
}
// Now we have a list of all the faces that will need to be drawn. Let's draw them.
CreateWaterFaces(myVoxel, chunk, x, y, z, curVertices, maxVertex);
// Finally increase the size so we can move on.
maxVertex += vertexSizeIncrease;
}
}
}
}
// The last thing we need to do is make sure we set the current primative's maxVertices to the right value.
maxVertices[(int)curLiqType] = maxVertex;
// Now actually force the VertexBuffer to be recreated in each primative we worked with.
for (int i = 0; i < lps.Length; i++)
{
LiquidPrimitive updatedPrimative = lps[i];
if (updatedPrimative == null)
{
continue;
}
maxVertex = maxVertices[i];
if (maxVertex > 0)
{
try
{
lock (updatedPrimative.VertexLock)
{
updatedPrimative.MaxVertex = maxVertex;
updatedPrimative.VertexBuffer = null;
}
}
catch (System.Threading.AbandonedMutexException e)
{
Console.Error.WriteLine(e.Message);
}
}
else
{
try
{
lock (updatedPrimative.VertexLock)
{
updatedPrimative.VertexBuffer = null;
updatedPrimative.Vertices = null;
updatedPrimative.Indexes = null;
updatedPrimative.MaxVertex = 0;
updatedPrimative.MaxIndex = 0;
}
}
catch (System.Threading.AbandonedMutexException e)
{
Console.Error.WriteLine(e.Message);
}
}
updatedPrimative.IsBuilding = false;
}
cache.inUse = false;
cache = null;
}