public void ReadFromCAR(Stream stream)
{
ushort vertexCount = stream.ReadUShort();
ushort normalCount = stream.ReadUShort();
ushort triangleCount = stream.ReadUShort();
ushort quadCount = stream.ReadUShort();
stream.Position += sizeof(ushort) * 2;
ushort uvTriangleCount = stream.ReadUShort();
ushort uvQuadCount = stream.ReadUShort();
stream.Position += sizeof(ushort) * 12;
Vertices = new List <Vertex>(vertexCount);
Normals = new List <Normal>(normalCount);
Triangles = new List <Polygon>(triangleCount);
Quads = new List <Polygon>(quadCount);
UVTriangles = new List <UVPolygon>(uvTriangleCount);
UVQuads = new List <UVPolygon>(uvQuadCount);
for (int i = 0; i < vertexCount; i++)
{
var vertex = new Vertex();
vertex.ReadFromCAR(stream);
Vertices.Add(vertex);
}
for (int i = 0; i < normalCount; i++)
{
var normal = new Normal();
normal.ReadFromCAR(stream);
Normals.Add(normal);
}
for (int i = 0; i < triangleCount; i++)
{
var triangle = new Polygon();
triangle.ReadFromCAR(stream, false, Vertices, Normals);
Triangles.Add(triangle);
}
for (int i = 0; i < quadCount; i++)
{
var quad = new Polygon();
quad.ReadFromCAR(stream, true, Vertices, Normals);
Quads.Add(quad);
}
for (int i = 0; i < uvTriangleCount; i++)
{
var uvTriangle = new UVPolygon();
uvTriangle.ReadFromCAR(stream, false, Vertices, Normals);
UVTriangles.Add(uvTriangle);
}
for (int i = 0; i < uvQuadCount; i++)
{
var uvQuad = new UVPolygon();
uvQuad.ReadFromCAR(stream, true, Vertices, Normals);
UVQuads.Add(uvQuad);
}
}
public virtual void ReadFromCDO(Stream stream, bool isQuad, List <Vertex> vertices, List <Normal> normals)
{
byte vertex0Ref = stream.ReadSingleByte();
Vertex0 = vertices[vertex0Ref];
byte vertex1Ref = stream.ReadSingleByte();
Vertex1 = vertices[vertex1Ref];
byte vertex2Ref = stream.ReadSingleByte();
Vertex2 = vertices[vertex2Ref];
byte vertex3Ref = stream.ReadSingleByte();
if (isQuad)
{
Vertex3 = vertices[vertex3Ref];
}
else if (vertex3Ref != 0x00)
{
throw new Exception("Vertex 3 in Triangle not zero");
}
ushort renderOrderAndFirstNormalData = stream.ReadUShort();
ushort renderFlagsData = stream.ReadUShort();
int normalsData = stream.ReadInt();
int faceTypeData = stream.ReadInt();
RenderOrder = renderOrderAndFirstNormalData & 0x1F;
if (RenderOrder == 0b1000)
{
Debug.WriteLine($"Render order of 0b1000 found at {stream.Position}");
}
if (normals.Any())
{
int normal0Ref = (renderOrderAndFirstNormalData >> 5) & 0x1FF;
Vertex0Normal = normals[normal0Ref];
}
RenderFlags = renderFlagsData >> 12;
if (RenderFlags != 0b1100 && RenderFlags != 0b1000 && RenderFlags != 0)
{
Debug.WriteLine($"Render flags of {RenderFlags} found at {stream.Position}");
}
if (normals.Any())
{
int normal1Ref = (normalsData >> 1) & 0x1FF;
Vertex1Normal = normals[normal1Ref];
int normal2Ref = (normalsData >> 10) & 0x1FF;
Vertex2Normal = normals[normal2Ref];
int normal3Ref = (normalsData >> 19) & 0x1FF;
Vertex3Normal = normals[normal3Ref];
}
FaceType = faceTypeData >> 24;
// 100000 (32) for untextured tri
// 100101 (37) for textured tri
// 101000 (40) for untextured quad
// 101101 (45) for textured quad
if (FaceType != 32 && FaceType != 37 && FaceType != 40 && FaceType != 45)
{
throw new Exception($"Unrecognised face type {FaceType}");
}
}
public virtual void ReadFromCAR(Stream stream, bool isQuad, List <Vertex> vertices, List <Normal> normals)
{
byte vertexByte0 = stream.ReadSingleByte();
byte vertexByte1 = stream.ReadSingleByte();
byte vertexByte2 = stream.ReadSingleByte();
byte vertexByte3 = stream.ReadSingleByte();
byte vertexByte4 = stream.ReadSingleByte();
byte vertexByte5 = stream.ReadSingleByte();
// example bytes:
// 0 1 2 3 4 5
// 1E 3A 68 88 00 00 -> 30 29 26 0
// 52 2E 60 88 00 00
// 16 32 60 88 17 00
// 1A 3A 70 80 1B 00
// 22 AC 64 88 16 00
// 41 DA BC 89 43 00
/*
*
* 1E - 0001 1110
* 3A - 0011 1010
* 68 - 0110 1000
* 88 - 1000 1000
*
* 0001 1110 0011 1010 0110 1000 1000 1000 0000 0000 0000 0000
*
* 0001 1110
* 0001 1101
* 0001 1010
*
* 0001 1110 - 30
* (0)001 1101 - 29
* (0)001 1010 - 26
* (0)001 0001 - 17 dec??
* (0)000 0000 - 0
* 0000 0000 0000
*
* V V V V
* 0001111000111010011010001000100000000000 0000 0000
*
* 49 - 0100 1001
* DA - 1101 1010
* BC - 1011 1100
* 89 - 1000 1001
* 43 - 0100 0011
*
* 0100 1001 1101 1010 1011 1100 1000 1001 0100 0011 0000 0000
*
* 0 1001001 1101101 0101111 0010001 0010100 0011000 00000
*
* 0100 1001 - 73
* 0110 1101 - 109
* 0010 1111 - 47
* 0001 0001 - 17 again
* 0001 0100 - 20
* 0001 1000 - 24
*
*/
int vertex0Ref = ((vertexByte1 & 1) * 256) + vertexByte0;
Vertex0 = vertices[vertex0Ref];
int vertex1Ref = ((vertexByte2 & 2) * 128) + ((vertexByte2 & 1) * 128) + (vertexByte1 >> 1);
Vertex1 = vertices[vertex1Ref];
int vertex2Ref = ((vertexByte3 & 4) * 64) + ((vertexByte3 & 2) * 64) + ((vertexByte3 & 1) * 64) + (vertexByte2 >> 2);
Vertex2 = vertices[vertex2Ref];
int vertex3Ref = ((vertexByte5 & 1) * 256) + vertexByte4;
if (isQuad)
{
Vertex3 = vertices[vertex3Ref];
}
/*else if (vertex3Ref != 0x00)
* {
* throw new System.Exception("Vertex 3 in Triangle not zero");
* }*/
byte normalsByte1 = stream.ReadSingleByte(); // many values - bottom bit tex only, top 5 tex only
byte normalsByte2 = stream.ReadSingleByte(); // 0, 1, 2, 3, 4, 5, 6, 128, 133 - top bit set on both unt and tex, not on tex quads but two tex tris
// bottom 3 bits set on tex only
// 0000 0000 - 0
// 0000 0001 - 1
// 0000 0010 - 2
// 0000 0011 - 3
// 0000 0100 - 4
// 0000 0101 - 5
// 0000 0110 - 6
// 1000 0000 - 128 + 0 - bottom bit of next normal index?
// 1000 0101 - 128 + 5
byte normalsByte3 = stream.ReadSingleByte(); // many values - very top bit set for any sort of tex poly, so normal 2 at most - all bits set at least once
// all bits set for tex only
byte normalsByte4 = stream.ReadSingleByte(); // many values - all 8 bits are only set for tex quads, so part of normal 3? - bit 2 never set?
byte normalsByte5 = stream.ReadSingleByte(); // 0, 1, 2, 3 - top bit of final normal index? - only set for tex quads, so top of normal 3
byte normalsByte6 = stream.ReadSingleByte(); // always 0
// 8 7 6 5 4 3 vb5
// 0000 0000 0000 0xxx xxxx xx0x xxxx xxxx x000 xxxx xxxx x0xx ---- ---v
// ttt tttt tt t tttt tttt a tttt tttt t tt tttt ttt
// qqq qqqq qq q
// 333 3333 33 2 2222 2222 ? 1111 1111 1 00 0000 000v
/*if ((vertexByte5 & 0b0000_0001) != 0)
* {
* Debug.WriteLine($"{GetType()} -- {isQuad}");
* }*/
if ((normalsByte2 & 0b1000_0000) != 0)
{
// faces with this bit set seem to be side windows, wheelarch interiors, wing mounts
RenderOrder = 0b10001;
}
int normal0Maybe = vertexByte5 + (normalsByte1 * 256);
normal0Maybe >>= 1;
normal0Maybe &= 0x1FF;
Vertex0Normal = normals[normal0Maybe];
int normal1Maybe = normalsByte1 + (normalsByte2 * 256);
normal1Maybe >>= 3;
normal1Maybe &= 0x1FF;
Vertex1Normal = normals[normal1Maybe];
int normal2Maybe = normalsByte3 + (normalsByte4 * 256);
normal2Maybe &= 0x1FF;
Vertex2Normal = normals[normal2Maybe];
int normal3Maybe = normalsByte4 + (normalsByte5 * 256);
normal3Maybe >>= 2;
normal3Maybe &= 0x1FF;
Vertex3Normal = normals[normal3Maybe];
byte isTextured1 = stream.ReadSingleByte(); // 00 for untextured, FF for textured
byte isTextured2 = stream.ReadSingleByte(); // 00 for untextured, FF for textured
byte isTextured3 = stream.ReadSingleByte(); // 00 for untextured, FF for textured
byte faceTypeData = stream.ReadSingleByte(); // 21 for unt tri, 29 unt quad, 25 tex tri, 2D tex quad
// 100001 / 21 unt tri - GT2 + 1
// 101001 / 29 unt quad - GT2 + 1
// 100101 / 25 tex tri
// 101101 / 2D tex quad
if (faceTypeData == 33 || faceTypeData == 41)
{
FaceType = faceTypeData - 1;
}
else
{
FaceType = faceTypeData;
}
}
private string WriteVertexToOBJ(Vertex vertex, Normal normal, List <Vertex> vertices, List <Normal> normals, int firstVertexNumber, int firstNormalNumber) =>
$"{vertices.IndexOf(vertex) + firstVertexNumber}//{normals.IndexOf(normal) + firstNormalNumber}";
private string WriteVertexToOBJ(Vertex vertex, Normal normal, List <Vertex> vertices, List <Normal> normals, int firstVertexNumber,
int firstNormalNumber, UVCoordinate coord, List <UVCoordinate> coords, int firstCoordNumber) =>
$"{vertices.IndexOf(vertex) + firstVertexNumber}/{coords.IndexOf(coord) + firstCoordNumber}/{normals.IndexOf(normal) + firstNormalNumber}";
