public static VoxelHandle GetNeighbor(VoxelHandle Of, GlobalVoxelOffset Offset)
{
if (!Of.IsValid)
{
return(VoxelHandle.InvalidHandle);
}
return(new VoxelHandle(Of.Chunk.Manager.ChunkData, Of.Coordinate + Offset));
}
private static void BuildVoxelTopFaceGeometry(
RawPrimitive Into,
VoxelChunk Chunk,
Cache Cache,
BoxPrimitive Primitive,
VoxelHandle V,
BoxPrimitive.BoxTextureCoords UVs,
int i)
{
var face = (BoxFace)i;
var delta = FaceDeltas[i];
var faceVoxel = new VoxelHandle(Chunk.Manager, V.Coordinate + GlobalVoxelOffset.FromVector3(delta));
if (!IsFaceVisible(V, faceVoxel, face))
{
return;
}
var faceDescriptor = Primitive.GetFace(face);
int exploredVerts = 0;
var vertexColors = new VertexColorInfo[4];
var vertexTint = new Color[4];
// Find all verticies to use for geometry later, and for the fringe
var vertexPositions = new Vector3[4];
for (int faceVertex = 0; faceVertex < faceDescriptor.VertexCount; faceVertex++)
{
var vertex = Primitive.Vertices[faceDescriptor.VertexOffset + faceVertex];
var voxelVertex = Primitive.Deltas[faceDescriptor.VertexOffset + faceVertex];
var rampOffset = Vector3.Zero;
if (V.IsExplored && V.Type.CanRamp && ShouldRamp(voxelVertex, V.RampType))
{
rampOffset = new Vector3(0, -V.Type.RampSize, 0);
}
var worldPosition = V.WorldPosition + vertex.Position + rampOffset;
//worldPosition += VertexNoise.GetNoiseVectorFromRepeatingTexture(worldPosition);
vertexPositions[faceVertex] = worldPosition;
}
if (V.IsExplored)
{
exploredVerts = 4;
}
else
{
for (int faceVertex = 0; faceVertex < faceDescriptor.VertexCount; ++faceVertex)
{
var voxelVertex = Primitive.Deltas[faceDescriptor.VertexOffset + faceVertex];
var cacheKey = GetCacheKey(V, voxelVertex);
bool anyNeighborExplored = true;
if (!Cache.ExploredCache.TryGetValue(cacheKey, out anyNeighborExplored))
{
anyNeighborExplored = VoxelHelpers.EnumerateVertexNeighbors2D(V.Coordinate, voxelVertex)
.Select(c => new VoxelHandle(V.Chunk.Manager, c))
.Any(n => n.IsValid && n.IsExplored);
Cache.ExploredCache.Add(cacheKey, anyNeighborExplored);
}
if (anyNeighborExplored)
{
exploredVerts += 1;
}
}
}
for (int faceVertex = 0; faceVertex < faceDescriptor.VertexCount; ++faceVertex)
{
var voxelVertex = Primitive.Deltas[faceDescriptor.VertexOffset + faceVertex];
var cacheKey = GetCacheKey(V, voxelVertex);
VertexColorInfo vertexColor;
if (!Cache.LightCache.TryGetValue(cacheKey, out vertexColor))
{
vertexColor = CalculateVertexLight(V, voxelVertex, Chunk.Manager);
Cache.LightCache.Add(cacheKey, vertexColor);
}
vertexColors[faceVertex] = vertexColor;
vertexTint[faceVertex] = new Color(1.0f, 1.0f, 1.0f, 1.0f);
if (exploredVerts != 4)
{
bool anyNeighborExplored = true;
if (!Cache.ExploredCache.TryGetValue(cacheKey, out anyNeighborExplored))
{
throw new InvalidProgramException("Failed cache lookup");
}
if (!anyNeighborExplored)
{
vertexTint[faceVertex] = new Color(0.0f, 0.0f, 0.0f, 1.0f);
}
}
vertexTint[faceVertex] = new Color(vertexTint[faceVertex].ToVector4() * V.Type.Tint.ToVector4());
}
if (exploredVerts != 0)
{
var baseUVs = UVs.Uvs[11]; // EW
var baseUVBounds = new Vector4(baseUVs.X + 0.001f, baseUVs.Y + 0.001f, baseUVs.X + (1.0f / 16.0f) - 0.001f, baseUVs.Y + (1.0f / 16.0f) - 0.001f);
// Draw central top tile.
AddTopFaceGeometry(Into,
Cache.AmbientValues, Primitive,
faceDescriptor,
vertexPositions,
vertexColors,
vertexTint,
Vector2.One,
baseUVs, baseUVBounds);
if (V.GrassType != 0)
{
BuildGrassFringeGeometry(Into, Chunk, Cache, Primitive, V, vertexColors,
vertexTint, vertexPositions, faceDescriptor, exploredVerts);
}
}
else
{
if (!Debugger.Switches.HideSliceTop)
{
var indexOffset = Into.VertexCount;
for (int faceVertex = 0; faceVertex < faceDescriptor.VertexCount; faceVertex++)
{
Into.AddVertex(new ExtendedVertex(
vertexPositions[faceVertex] + VertexNoise.GetNoiseVectorFromRepeatingTexture(vertexPositions[faceVertex]),
new Color(0, 0, 0, 255),
new Color(0, 0, 0, 255),
new Vector2(12.5f / 16.0f, 0.5f / 16.0f),
new Vector4(12.0f / 16.0f, 0.0f, 13.0f / 16.0f, 1.0f / 16.0f)));
}
for (int idx = faceDescriptor.IndexOffset; idx < faceDescriptor.IndexCount +
faceDescriptor.IndexOffset; idx++)
{
ushort offset = Primitive.Indexes[idx];
ushort offset0 = Primitive.Indexes[faceDescriptor.IndexOffset];
Into.AddIndex((short)(indexOffset + offset - offset0));
}
}
}
}
private static void BuildVoxelFaceGeometry(
RawPrimitive Into,
VoxelChunk Chunk,
Cache Cache,
BoxPrimitive Primitive,
VoxelHandle V,
Color Tint,
BoxPrimitive.BoxTextureCoords UVs,
Matrix VertexTransform,
int i,
bool ApplyLighting)
{
var face = (BoxFace)i;
var delta = FaceDeltas[i];
var faceVoxel = new VoxelHandle(Chunk.Manager, V.Coordinate + GlobalVoxelOffset.FromVector3(delta));
if (!IsFaceVisible(V, faceVoxel, face))
{
return;
}
var faceDescriptor = Primitive.GetFace(face);
var indexOffset = Into.VertexCount;
for (int faceVertex = 0; faceVertex < faceDescriptor.VertexCount; faceVertex++)
{
var vertex = Primitive.Vertices[faceDescriptor.VertexOffset + faceVertex];
var voxelVertex = Primitive.Deltas[faceDescriptor.VertexOffset + faceVertex];
var vertexColor = new VertexColorInfo
{
SunColor = 255,
AmbientColor = 255,
DynamicColor = 255,
};
if (ApplyLighting)
{
var cacheKey = GetCacheKey(V, voxelVertex);
if (!Cache.LightCache.TryGetValue(cacheKey, out vertexColor))
{
vertexColor = CalculateVertexLight(V, voxelVertex, Chunk.Manager);
Cache.LightCache.Add(cacheKey, vertexColor);
}
Cache.AmbientValues[faceVertex] = vertexColor.AmbientColor;
}
var rampOffset = Vector3.Zero;
if (V.IsExplored && V.Type.CanRamp && ShouldRamp(voxelVertex, V.RampType))
{
rampOffset = new Vector3(0, -V.Type.RampSize, 0);
}
var baseWorldPosition = V.WorldPosition + vertex.Position + rampOffset;
var noise = VertexNoise.GetNoiseVectorFromRepeatingTexture(baseWorldPosition);
var localPosition = Vector3.Transform(vertex.Position + rampOffset + noise, VertexTransform);
Into.AddVertex(new ExtendedVertex(
V.WorldPosition + localPosition,
vertexColor.AsColor(),
Tint,
UVs.Uvs[faceDescriptor.VertexOffset + faceVertex],
UVs.Bounds[faceDescriptor.IndexOffset / 6]));
}
bool flippedQuad = ApplyLighting && (Cache.AmbientValues[0] + Cache.AmbientValues[2] >
Cache.AmbientValues[1] + Cache.AmbientValues[3]);
for (int idx = faceDescriptor.IndexOffset; idx < faceDescriptor.IndexCount +
faceDescriptor.IndexOffset; idx++)
{
ushort offset = flippedQuad ? Primitive.FlippedIndexes[idx] : Primitive.Indexes[idx];
ushort offset0 = flippedQuad ? Primitive.FlippedIndexes[faceDescriptor.IndexOffset] : Primitive.Indexes[faceDescriptor.IndexOffset];
Into.AddIndex((short)(indexOffset + offset - offset0));
}
}
private static int SuccessorToEuclidianLookupKey(GlobalVoxelOffset C)
{
return((C.X + 1) + (C.Y + 1) * 3 + (C.Z + 1) * 9);
}