public static byte[] CreateExePackedImage()
{
var egaCmn = Resource.Load("EGA.CMN");
var mcgaCod = Resource.Load("MCGA.COD");
var mcgaDif = Resource.Load("MCGA.DIF");
var mcgaHdr = Resource.Load("MCGA.HDR");
var bytesInLastPage = ReadUshortAt(mcgaHdr, 2);
var pagesInExecutable = ReadUshortAt(mcgaHdr, 4);
var paragraphsInHeader = ReadUshortAt(mcgaHdr, 8);
int executableSize = pagesInExecutable << 9;
if (bytesInLastPage > 0)
{
executableSize += bytesInLastPage - 0x1f0;
}
int headerSize = paragraphsInHeader << 4;
var executableImage = new byte[executableSize];
mcgaHdr.CopyTo(executableImage, 0);
egaCmn.CopyTo(executableImage, headerSize);
mcgaCod.CopyTo(executableImage, headerSize + egaCmn.Length);
var difStream = new ReadStream(mcgaDif);
int writeOffset = headerSize - 1;
while (true)
{
var jump = (ushort)difStream.ReadShort();
if (jump == 0)
{
break;
}
writeOffset += jump & 0x7fff;
executableImage[writeOffset] = difStream.ReadByte();
executableImage[writeOffset + 1] = difStream.ReadByte();
if ((jump & 0x8000) != 0)
{
executableImage[writeOffset + 2] = difStream.ReadByte();
executableImage[writeOffset + 3] = difStream.ReadByte();
}
}
return(executableImage);
}
public Primitive(int paintJobCount, ReadStream input)
{
var primitiveCode = input.ReadByte();
int indexCount = primitiveCode;
switch (primitiveCode)
{
case 1:
Type = PrimitiveType.Particle;
break;
case 2:
Type = PrimitiveType.Line;
break;
case 11:
Type = PrimitiveType.Sphere;
indexCount = 2;
break;
case 12:
Type = PrimitiveType.Wheel;
indexCount = 6;
break;
default:
if (3 <= primitiveCode && primitiveCode <= 10)
{
Type = PrimitiveType.Polygon;
}
else
{
Type = PrimitiveType.Ignored;
indexCount = 0;
}
break;
}
var flags = input.ReadByte();
IsTwoSided = (flags & 1) != 0;
HasZBias = (flags & 2) != 0;
Materials = input.ReadByteArray(paintJobCount);
Indices = input.ReadByteArray(indexCount);
}
public Model(ReadStream input)
{
var vertexCount = input.ReadByte();
var primitiveCount = input.ReadByte();
PaintJobCount = input.ReadByte();
input.Skip(1);
Vertices = new Vector3[vertexCount];
for (int i = 0; i < vertexCount; i++)
{
Vertices[i] = input.ReadVertex();
}
input.Skip(8 * primitiveCount);
Primitives = new Primitive[primitiveCount];
for (int i = 0; i < primitiveCount; i++)
{
Primitives[i] = new Primitive(PaintJobCount, input);
}
}
