/// <summary>
/// Reads a buffer mesh from a byte array
/// </summary>
/// <param name="source">Byte source</param>
/// <param name="address">Address at which the buffermesh is located</param>
public static BufferMesh Read(byte[] source, uint address, uint imageBase)
{
BufferVertex[] vertices = new BufferVertex[source.ToUInt16(address)];
bool continueWeight = source.ToUInt16(address + 2) != 0;
BufferCorner[] corners = new BufferCorner[source.ToUInt32(address + 4)];
uint[] triangles = new uint[source.ToUInt32(address + 8)];
address += 12;
BufferMaterial material = BufferMaterial.Read(source, ref address);
uint tmpAddr = source.ToUInt32(address) - imageBase;
for (int i = 0; i < vertices.Length; i++)
{
vertices[i] = BufferVertex.Read(source, ref tmpAddr);
}
tmpAddr = source.ToUInt32(address += 4) - imageBase;
for (int i = 0; i < corners.Length; i++)
{
corners[i] = BufferCorner.Read(source, ref tmpAddr);
}
tmpAddr = source.ToUInt32(address += 4) - imageBase;
for (int i = 0; i < triangles.Length; i++)
{
triangles[i] = source.ToUInt32(tmpAddr);
tmpAddr += 4;
}
if (vertices.Length == 0)
{
return(new BufferMesh(corners, triangles, material));
}
else if (corners.Length == 0)
{
return(new BufferMesh(vertices, continueWeight));
}
else
{
return(new BufferMesh(vertices, continueWeight, corners, triangles, material));
}
}
/// <summary>
/// Optimizes the triangles and removes degenerate triangles <br/>
/// Keeps the original vertex data
/// </summary>
public void Optimize()
{
if (Corners == null)
{
return;
}
BufferCorner[] corners = Corners;
if (TriangleList != null)
{
corners = new BufferCorner[TriangleList.Length];
for (int i = 0; i < TriangleList.Length; i++)
{
corners[i] = Corners[TriangleList[i]];
}
}
// filter degenerate triangles
int newArraySize = corners.Length;
for (int i = 0; i < newArraySize; i += 3)
{
ushort index1 = corners[i].VertexIndex;
ushort index2 = corners[i + 1].VertexIndex;
ushort index3 = corners[i + 2].VertexIndex;
if (index1 == index2 || index2 == index3 || index3 == index1)
{
corners[i] = corners[newArraySize - 3];
corners[i + 1] = corners[newArraySize - 2];
corners[i + 2] = corners[newArraySize - 1];
i -= 3;
newArraySize -= 3;
}
}
Array.Resize(ref corners, newArraySize);
// get the triangle mapping
(BufferCorner[] distinct, int[] map) = corners.CreateDistinctMap();
Corners = distinct;
TriangleList = (uint[])(object)map; // i cant believe this works lol
}
