private static void AddDecalGeometry(
RawPrimitive Into,
int[] AmbientScratchSpace,
BoxPrimitive Primitive,
VoxelHandle V,
BoxPrimitive.FaceDescriptor faceDescriptor,
int exploredVerts,
Vector3[] VertexPositions,
VertexColorInfo[] VertexColors,
Color[] VertexTints,
DecalType Decal,
byte Orientation)
{
var indexOffset = Into.VertexCount;
var UV = new Vector2(Decal.Tile.X * (1.0f / 16.0f), Decal.Tile.Y * (1.0f / 16.0f));
var UVBounds = new Vector4(UV.X + 0.001f, UV.Y + 0.001f, UV.X + (1.0f / 16.0f) - 0.001f, UV.Y + (1.0f / 16.0f) - 0.001f);
var UVs = new Vector2[faceDescriptor.VertexCount];
for (int faceVertex = 0; faceVertex < faceDescriptor.VertexCount; faceVertex++)
{
var vertex = Primitive.Vertices[faceDescriptor.VertexOffset + faceVertex];
UVs[faceVertex] = UV + new Vector2(vertex.Position.X / 16.0f, vertex.Position.Z / 16.0f);
}
for (int faceVertex = 0; faceVertex < faceDescriptor.VertexCount; faceVertex++)
{
var vertex = Primitive.Vertices[faceDescriptor.VertexOffset + faceVertex];
AmbientScratchSpace[faceVertex] = VertexColors[faceVertex].AmbientColor;
var uv = faceVertex + Orientation;
uv %= faceDescriptor.VertexCount; // This will only work if the face has 4 verts...
Into.AddVertex(new ExtendedVertex(
VertexPositions[faceVertex] + VertexNoise.GetNoiseVectorFromRepeatingTexture(VertexPositions[faceVertex]),
VertexColors[faceVertex].AsColor(),
VertexTints[faceVertex],
UVs[uv],
UVBounds));
}
bool flippedQuad = AmbientScratchSpace[0] + AmbientScratchSpace[2] >
AmbientScratchSpace[1] + AmbientScratchSpace[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 void BuildDecalGeometry(
RawPrimitive Into,
VoxelChunk Chunk,
Cache Cache,
BoxPrimitive Primitive,
VoxelHandle V,
VertexColorInfo[] VertexColors,
Color[] VertexTint,
Vector3[] VertexPositions,
BoxPrimitive.FaceDescriptor Face,
int ExploredVerts)
{
if (V.DecalType == 0)
{
return;
}
var decalType = Library.GetDecalType(V.DecalType);
AddDecalGeometry(Into, Cache.AmbientValues, Primitive, Face, ExploredVerts, VertexPositions, VertexColors, VertexTint, decalType);
}
private static void AddTopFaceGeometry(
RawPrimitive Into,
int[] AmbientScratchSpace,
BoxPrimitive Primitive,
BoxPrimitive.FaceDescriptor faceDescriptor,
Vector3[] VertexPositions,
VertexColorInfo[] VertexColors,
Color[] VertexTints,
Vector2 UVScale,
Vector2 UV,
Vector4 UVBounds)
{
var indexOffset = Into.VertexCount;
for (int faceVertex = 0; faceVertex < faceDescriptor.VertexCount; faceVertex++)
{
var vertex = Primitive.Vertices[faceDescriptor.VertexOffset + faceVertex];
AmbientScratchSpace[faceVertex] = VertexColors[faceVertex].AmbientColor;
Into.AddVertex(new ExtendedVertex(
VertexPositions[faceVertex] + VertexNoise.GetNoiseVectorFromRepeatingTexture(VertexPositions[faceVertex]),
VertexColors[faceVertex].AsColor(),
VertexTints[faceVertex],
UV + new Vector2(vertex.Position.X / 16.0f * UVScale.X, vertex.Position.Z / 16.0f * UVScale.Y),
UVBounds));
}
bool flippedQuad = AmbientScratchSpace[0] + AmbientScratchSpace[2] >
AmbientScratchSpace[1] + AmbientScratchSpace[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 void AddGrassGeometry(
RawPrimitive Into,
int[] AmbientScratchSpace,
BoxPrimitive Primitive,
BoxPrimitive.FaceDescriptor faceDescriptor,
Vector3[] VertexPositions,
VertexColorInfo[] VertexColors,
Color[] VertexTints,
GrassType Decal)
{
var indexOffset = Into.VertexCount;
var UV = new Vector2(Decal.Tile.X * (1.0f / 16.0f), Decal.Tile.Y * (1.0f / 16.0f));
var UVBounds = new Vector4(UV.X + 0.001f, UV.Y + 0.001f, UV.X + (1.0f / 16.0f) - 0.001f, UV.Y + (1.0f / 16.0f) - 0.001f);
for (int faceVertex = 0; faceVertex < faceDescriptor.VertexCount; faceVertex++)
{
var vertex = Primitive.Vertices[faceDescriptor.VertexOffset + faceVertex];
AmbientScratchSpace[faceVertex] = VertexColors[faceVertex].AmbientColor;
Into.AddVertex(new ExtendedVertex(
VertexPositions[faceVertex] + VertexNoise.GetNoiseVectorFromRepeatingTexture(VertexPositions[faceVertex]),
VertexColors[faceVertex].AsColor(),
VertexTints[faceVertex],
UV + new Vector2(vertex.Position.X / 16.0f, vertex.Position.Z / 16.0f),
UVBounds));
}
bool flippedQuad = (AmbientScratchSpace[0] + AmbientScratchSpace[2]) > (AmbientScratchSpace[1] + AmbientScratchSpace[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 void BuildGrassFringeGeometry(
RawPrimitive Into,
VoxelChunk Chunk,
Cache Cache,
BoxPrimitive Primitive,
VoxelHandle V,
VertexColorInfo[] VertexColors,
Color[] VertexTint,
Vector3[] VertexPositions,
BoxPrimitive.FaceDescriptor Face,
int ExploredVerts)
{
if (V.GrassType == 0)
{
return;
}
var decalType = Library.GetGrassType(V.GrassType);
AddGrassGeometry(Into, Cache.AmbientValues, Primitive, V, Face, ExploredVerts, VertexPositions, VertexColors, VertexTint, decalType);
// Draw fringe
if (decalType.FringeTransitionUVs == null)
{
return;
}
for (var s = 0; s < 4; ++s)
{
var neighborCoord = V.Coordinate + VoxelHelpers.ManhattanNeighbors2D[s];
var neighbor = new VoxelHandle(Chunk.Manager, neighborCoord);
if (!neighbor.IsValid)
{
continue;
}
var aboveNeighbor = new VoxelHandle(Chunk.Manager, neighborCoord + new GlobalVoxelOffset(0, 1, 0));
if (!aboveNeighbor.IsValid || aboveNeighbor.IsEmpty)
{
// Draw horizontal fringe.
if (!neighbor.IsEmpty)
{
if (neighbor.GrassType != 0 &&
Library.GetGrassType(neighbor.GrassType).FringePrecedence >= decalType.FringePrecedence)
{
continue;
}
}
// Twizzle vertex positions.
var newPositions = new Vector3[4];
newPositions[FringeIndicies[s, 0]] = VertexPositions[FringeIndicies[s, 4]];
newPositions[FringeIndicies[s, 1]] = VertexPositions[FringeIndicies[s, 4]]
+ (VoxelHelpers.ManhattanNeighbors2D[s].AsVector3() * 0.5f);
newPositions[FringeIndicies[s, 2]] = VertexPositions[FringeIndicies[s, 5]]
+ (VoxelHelpers.ManhattanNeighbors2D[s].AsVector3() * 0.5f);
newPositions[FringeIndicies[s, 3]] = VertexPositions[FringeIndicies[s, 5]];
var newColors = new VertexColorInfo[4];
newColors[FringeIndicies[s, 0]] = VertexColors[FringeIndicies[s, 4]];
newColors[FringeIndicies[s, 1]] = VertexColors[FringeIndicies[s, 4]];
newColors[FringeIndicies[s, 2]] = VertexColors[FringeIndicies[s, 5]];
newColors[FringeIndicies[s, 3]] = VertexColors[FringeIndicies[s, 5]];
var slopeTweak = new Vector3(0.0f, 0.0f, 0.0f);
if (neighbor.IsEmpty)
{
slopeTweak.Y = -0.5f;
}
else
{
slopeTweak.Y = 0.125f;
}
newPositions[FringeIndicies[s, 1]] += slopeTweak;
newPositions[FringeIndicies[s, 2]] += slopeTweak;
var newTints = new Color[4];
newTints[FringeIndicies[s, 0]] = VertexTint[FringeIndicies[s, 4]];
newTints[FringeIndicies[s, 1]] = VertexTint[FringeIndicies[s, 4]];
newTints[FringeIndicies[s, 2]] = VertexTint[FringeIndicies[s, 5]];
newTints[FringeIndicies[s, 3]] = VertexTint[FringeIndicies[s, 5]];
AddTopFaceGeometry(Into,
Cache.AmbientValues, Primitive,
Face,
newPositions,
newColors,
newTints,
SideFringeUVScales[s],
decalType.FringeTransitionUVs[s].UV,
decalType.FringeTransitionUVs[s].Bounds);
}
else
{
// Draw vertical fringe!
var newPositions = new Vector3[4];
newPositions[FringeIndicies[s, 0]] = VertexPositions[FringeIndicies[s, 4]];
newPositions[FringeIndicies[s, 1]] = VertexPositions[FringeIndicies[s, 4]]
+ new Vector3(0.0f, 0.5f, 0.0f)
+ (VoxelHelpers.ManhattanNeighbors2D[s].AsVector3() * -0.05f);
newPositions[FringeIndicies[s, 2]] = VertexPositions[FringeIndicies[s, 5]]
+ new Vector3(0.0f, 0.5f, 0.0f)
+ (VoxelHelpers.ManhattanNeighbors2D[s].AsVector3() * -0.05f);
newPositions[FringeIndicies[s, 3]] = VertexPositions[FringeIndicies[s, 5]];
var newColors = new VertexColorInfo[4];
newColors[FringeIndicies[s, 0]] = VertexColors[FringeIndicies[s, 4]];
newColors[FringeIndicies[s, 1]] = VertexColors[FringeIndicies[s, 4]];
newColors[FringeIndicies[s, 2]] = VertexColors[FringeIndicies[s, 5]];
newColors[FringeIndicies[s, 3]] = VertexColors[FringeIndicies[s, 5]];
var newTints = new Color[4];
newTints[FringeIndicies[s, 0]] = VertexTint[FringeIndicies[s, 4]];
newTints[FringeIndicies[s, 1]] = VertexTint[FringeIndicies[s, 4]];
newTints[FringeIndicies[s, 2]] = VertexTint[FringeIndicies[s, 5]];
newTints[FringeIndicies[s, 3]] = VertexTint[FringeIndicies[s, 5]];
AddTopFaceGeometry(Into,
Cache.AmbientValues, Primitive,
Face,
newPositions,
newColors,
newTints,
SideFringeUVScales[s],
decalType.FringeTransitionUVs[s].UV,
decalType.FringeTransitionUVs[s].Bounds);
}
}
for (var s = 0; s < 4; ++s)
{
var neighborCoord = V.Coordinate + VoxelHelpers.DiagonalNeighbors2D[s];
var handle = new VoxelHandle(Chunk.Manager, neighborCoord);
if (handle.IsValid)
{
if (!handle.IsEmpty)
{
if (handle.GrassType != 0 &&
Library.GetGrassType(handle.GrassType).FringePrecedence >= decalType.FringePrecedence)
{
continue;
}
}
var manhattanA = new VoxelHandle(Chunk.Manager, V.Coordinate + VoxelHelpers.ManhattanNeighbors2D[s]);
if (!manhattanA.IsValid || (manhattanA.GrassType == V.GrassType))
{
continue;
}
manhattanA = new VoxelHandle(Chunk.Manager, V.Coordinate + VoxelHelpers.ManhattanNeighbors2D[FringeIndicies[4 + s, 5]]);
if (!manhattanA.IsValid || (manhattanA.GrassType == V.GrassType))
{
continue;
}
// Twizzle vertex positions.
var newPositions = new Vector3[4];
var pivot = VertexPositions[FringeIndicies[4 + s, 4]];
var nDelta = VoxelHelpers.DiagonalNeighbors2D[s].AsVector3();
newPositions[FringeIndicies[4 + s, 0]] = pivot;
newPositions[FringeIndicies[4 + s, 1]] = pivot + new Vector3(nDelta.X * 0.5f, 0, 0);
newPositions[FringeIndicies[4 + s, 2]] = pivot + new Vector3(nDelta.X * 0.5f, 0, nDelta.Z * 0.5f);
newPositions[FringeIndicies[4 + s, 3]] = pivot + new Vector3(0, 0, nDelta.Z * 0.5f);
var slopeTweak = new Vector3(0.0f, 0.0f, 0.0f);
if (handle.IsEmpty)
{
slopeTweak.Y = -0.5f;
}
else
{
slopeTweak.Y = 0.125f;
}
newPositions[FringeIndicies[4 + s, 1]] += slopeTweak;
newPositions[FringeIndicies[4 + s, 2]] += slopeTweak;
newPositions[FringeIndicies[4 + s, 3]] += slopeTweak;
var newColors = new VertexColorInfo[4];
newColors[FringeIndicies[4 + s, 0]] = VertexColors[FringeIndicies[4 + s, 4]];
newColors[FringeIndicies[4 + s, 1]] = VertexColors[FringeIndicies[4 + s, 4]];
newColors[FringeIndicies[4 + s, 2]] = VertexColors[FringeIndicies[4 + s, 4]];
newColors[FringeIndicies[4 + s, 3]] = VertexColors[FringeIndicies[4 + s, 4]];
var newTints = new Color[4];
newTints[FringeIndicies[4 + s, 0]] = VertexTint[FringeIndicies[4 + s, 4]];
newTints[FringeIndicies[4 + s, 1]] = VertexTint[FringeIndicies[4 + s, 4]];
newTints[FringeIndicies[4 + s, 2]] = VertexTint[FringeIndicies[4 + s, 4]];
newTints[FringeIndicies[4 + s, 3]] = VertexTint[FringeIndicies[4 + s, 4]];
AddTopFaceGeometry(Into,
Cache.AmbientValues, Primitive,
Face,
newPositions,
newColors,
newTints,
new Vector2(0.5f, 0.5f),
decalType.FringeTransitionUVs[4 + s].UV,
decalType.FringeTransitionUVs[4 + s].Bounds);
}
}
}
