void UpdateMesh(int newVersion, int blockBufferSize, int vertexBufferSize, int faceBufferSize)
{
MeshVersion = newVersion;
int[] blockArray = new int[blockBufferSize];
float[] vertexArray = new float[vertexBufferSize];
int[] faceArray = new int[faceBufferSize];
int fullBlocks = 0;
unsafe
{
fixed(int *blockBufferPtr = &blockArray[0], faceBufferPtr = &faceArray[0])
{
fixed(float *vertexBufferPtr = &vertexArray[0])
{
fullBlocks = SDPlugin.SixDegreesSDK_GetBlockMesh(blockBufferPtr, vertexBufferPtr, faceBufferPtr, blockBufferSize, vertexBufferSize, faceBufferSize);
}
}
}
bool gotAllBlocks = (fullBlocks == blockBufferSize / 6);
if (fullBlocks > 0)
{
}
else
{
Console.WriteLine("SixDegreesSDK_GetMeshBlocks() gave us an empty mesh, will not update.");
return;
}
if (!gotAllBlocks)
{
Console.WriteLine("SixDegreesSDK_GetMeshBlocks() returned %d full blocks, expected %d, will not update", fullBlocks, (blockBufferSize / 6));
return;
}
var vertexCount = vertexBufferSize / 6;
var blocksToUpdate = new List <Vector3>();
var firstBlockVertex = 0;
var firstBlockFace = 0;
// Update all the full blocks returned by the API
for (int b = 0; b < blockBufferSize; b += 6)
{
// Transform block coordinates from 6D right-handed coordinates to Unity left-handed coordinates
// By flipping the sign of Z
Vector3 blockCoords = new Vector3(blockArray[b], blockArray[b + 1], blockArray[b + 2]);
int blockVertexCount = blockArray[b + 3];
int blockFaceCount = blockArray[b + 4];
int blockVersion = blockArray[b + 5];
var block = GetOrCreateBlock(blockCoords);
block.MeshVersion = MeshVersion;
// Update block if it is outdated
if (block.Version < blockVersion)
{
blocksToUpdate.Add(blockCoords);
block.Version = blockVersion;
block.Vertices = new List <SCNVector3>();
block.Normals = new List <SCNVector3>();
block.Faces = new List <int>();
// copy vertices
for (int j = firstBlockVertex; j < firstBlockVertex + blockVertexCount; j++)
{
var vertex = j;
var pos = vertex * 3;
block.Vertices.Add(new SCNVector3(vertexArray[pos],
vertexArray[pos + 1],
vertexArray[pos + 2]));
var norm = (vertex + vertexCount) * 3;
block.Normals.Add(new SCNVector3(vertexArray[norm],
vertexArray[norm + 1],
vertexArray[norm + 2]));
}
// copy faces
var offset = firstBlockVertex;
for (int face = firstBlockFace; face < firstBlockFace + blockFaceCount; face++)
{
var f = face * 3;
block.Faces.Add(faceArray[f] - offset);
block.Faces.Add(faceArray[f + 1] - offset);
block.Faces.Add(faceArray[f + 2] - offset);
}
}
firstBlockVertex += blockVertexCount;
firstBlockFace += blockFaceCount;
}
var blocksToDelete = new List <Vector3>();
// Clean up outdated blocks
foreach (var item in Blocks.Values)
{
if (item.MeshVersion != MeshVersion)
{
blocksToDelete.Add(item.Coordinates);
}
}
DeleteBlocks(blocksToDelete);
UpdateBlocks(blocksToUpdate);
}