/// <summary>
/// Sets the mesh for a specified body part
/// </summary>
public void SetPartMesh( ModelPart part, ModelMesh mesh )
{
m_PartMeshes[ ( int )part ] = mesh;
}
/// <summary>
/// Sets the root mesh, rendered
/// </summary>
public void SetRootMesh( ModelMesh rootMesh )
{
m_RootMesh = rootMesh;
}
/// <summary>
/// Reads surface vertices (positions and normals)
/// </summary>
private static void ReadVertices( BinaryReader reader, long offset, int numVertices, int numFrames, ModelMesh.Surface surface, Matrix44 transform )
{
reader.BaseStream.Seek( offset, SeekOrigin.Begin );
// Allocate surface frames
surface.SurfaceFrames = new ModelMesh.SurfaceFrame[ numFrames ];
// Allocate temporary arrays for storing position and normal data
float[] positions = new float[ numVertices * 3 ];
float[] normals = new float[ numVertices * 3 ];
// Run through all frames
for ( int frameIndex = 0; frameIndex < numFrames; ++frameIndex )
{
int positionIndex = 0;
int normalIndex = 0;
// Allocate a surface frame
ModelMesh.SurfaceFrame frame = new ModelMesh.SurfaceFrame( );
// Run through all vertices
for ( int vertexCount = 0; vertexCount < numVertices; ++vertexCount )
{
// NOTE: Re-order coordinates. I use +ve Y as up, +ve X as right, +ve Z as into, MD3 default is +ve X as into, +ve Y as right, +ve Z as up
Point3 pt = new Point3( );
pt.Z = reader.ReadInt16( ) * XyzScale;
pt.X = reader.ReadInt16( ) * XyzScale;
pt.Y = reader.ReadInt16( ) * XyzScale;
pt = transform * pt;
positions[ positionIndex + 0 ] = pt.X;
positions[ positionIndex + 1 ] = pt.Y;
positions[ positionIndex + 2 ] = pt.Z;
positionIndex += 3;
float s = reader.ReadByte( ) * ByteToAngle;
float t = reader.ReadByte( ) * ByteToAngle;
normals[ normalIndex + 2 ] = ( Functions.Cos( s ) * Functions.Sin( t ) );
normals[ normalIndex + 0 ] = ( Functions.Sin( s ) * Functions.Sin( t ) );
normals[ normalIndex + 1 ] = ( Functions.Cos( t ) );
normalIndex += 3;
}
// Convert position and normal data into vertex buffer objects
frame.VertexBuffers = new OpenGlVertexArray[ 2 ];
frame.VertexBuffers[ 0 ] = new OpenGlVertexArray( numVertices, 0, Gl.GL_VERTEX_ARRAY, 0, 3, Gl.GL_STATIC_DRAW_ARB, positions );
frame.VertexBuffers[ 1 ] = new OpenGlVertexArray( numVertices, 0, Gl.GL_NORMAL_ARRAY, 0, 3, Gl.GL_STATIC_DRAW_ARB, normals );
// Assign the frame to the surface
surface.SurfaceFrames[ frameIndex ] = frame;
}
}
/// <summary>
/// Reads tag information
/// </summary>
private static void ReadTags( BinaryReader reader, long offset, int numTags, int numFrames, ModelMesh mesh, Matrix44 transform )
{
reader.BaseStream.Seek( offset, SeekOrigin.Begin );
mesh.TagNames = new string[ numTags ];
for ( int frameIndex = 0; frameIndex < numFrames; ++frameIndex )
{
ModelMesh.Tag[] tags = new ModelMesh.Tag[ numTags ];
for ( int tagCount = 0; tagCount < numTags; ++tagCount )
{
string tagName = ReadString( reader, MaxPathLength );
if ( frameIndex == 0 )
{
mesh.TagNames[ tagCount ] = tagName;
}
Point3 origin = transform * ReadPoint( reader );
Vector3 xAxis = ReadVector( reader );
Vector3 yAxis = ReadVector( reader );
Vector3 zAxis = ReadVector( reader );
ModelMesh.Tag curTag = new ModelMesh.Tag( );
curTag.Transform = new Matrix44( origin, xAxis, yAxis, zAxis );
curTag.Name = tagName;
tags[ tagCount ] = curTag;
}
mesh.FrameInfoList[ frameIndex ].Tags = tags;
}
}
/// <summary>
/// Reads surface information
/// </summary>
private static void ReadSurfaces( ISource source, BinaryReader reader, long offset, int numSurfaces, int numFrames, ModelMesh mesh, IDictionary<string, ITexture2d> surfaceTextureTable, Matrix44 transform)
{
// Move to the start of the first surface
reader.BaseStream.Seek( offset, SeekOrigin.Begin );
// Allocate mesh surface array
mesh.Surfaces = new ModelMesh.Surface[ numSurfaces ];
for ( int surfaceCount = 0; surfaceCount < numSurfaces; ++surfaceCount )
{
// Create a new surface
ModelMesh.Surface curSurface = new ModelMesh.Surface( );
//int ident =
reader.ReadInt32( );
string name = ReadString ( reader, MaxPathLength );
//int flags =
reader.ReadInt32( );
//int surfaceNumFrames =
reader.ReadInt32( );
//int numShaders =
reader.ReadInt32( );
int numVertices = reader.ReadInt32( );
int numTriangles = reader.ReadInt32( );
int trianglesOffset = reader.ReadInt32( );
//int shadersOffset =
reader.ReadInt32( );
int texturesOffset = reader.ReadInt32( );
int verticesOffset = reader.ReadInt32( );
int endOffset = reader.ReadInt32( );
// Assign surface texture
curSurface.Texture = GetTexture( source, surfaceTextureTable, name );
// Assign surface shaders
// ReadShaders( reader, offset + shadersOffset, numShaders );
// Read in surface index group and texture UVs
curSurface.Group = ReadTriangles( reader, offset + trianglesOffset, numTriangles );
curSurface.TextureUVs = ReadTextureUVs( reader, offset + texturesOffset, numVertices );
// Read in surface vertices
// curSurface.NumVertices = numVertices;
ReadVertices( reader, offset + verticesOffset, numVertices, numFrames, curSurface, transform );
// Assign the new surface to the mesh
mesh.Surfaces[ surfaceCount ] = curSurface;
// Move the stream to the next surface
reader.BaseStream.Seek( offset + endOffset, SeekOrigin.Begin );
offset += endOffset;
}
}
/// <summary>
/// Reads frame information
/// </summary>
private static void ReadFrames( BinaryReader reader, long offset, int numFrames, ModelMesh mesh, Matrix44 transform )
{
reader.BaseStream.Seek( offset, SeekOrigin.Begin );
ModelMesh.FrameInfo[] frames = new ModelMesh.FrameInfo[ numFrames ];
float scaleLength = ( transform * new Vector3( 1, 1, 1 ) ).Length;
for ( int frameCount = 0; frameCount < numFrames; ++frameCount )
{
frames[ frameCount] = new ModelMesh.FrameInfo( );
ModelMesh.FrameInfo curFrame = frames[ frameCount ];
curFrame.MinBounds = transform * ReadPoint( reader );
curFrame.MaxBounds = transform * ReadPoint( reader );
curFrame.Origin = transform * ReadPoint( reader );
curFrame.Radius = reader.ReadSingle( ) * scaleLength;
curFrame.Name = ReadString( reader, FrameNameLength );
}
mesh.FrameInfoList = frames;
}
/// <summary>
/// Loads an MD3 mesh resource from a stream
/// </summary>
private static ModelMesh LoadMd3( ISource source, Model model, ModelPart part, Matrix44 transform, ISource md3Source, IDictionary<string, ITexture2d> surfaceTextureTable )
{
using ( Stream inputStream = OpenStream( md3Source ) )
{
BinaryReader reader = new BinaryReader( inputStream );
// http://icculus.org/homepages/phaethon/q3a/formats/md3format.html
// Make sure of the MD3 identity
byte[] ident = reader.ReadBytes( 4 );
if ( ( ident[ 0 ] != 'I' ) || ( ident[ 1 ] != 'D' ) || ( ident[ 2 ] != 'P' ) || ( ident[ 3 ] != '3' ) )
{
throw new ApplicationException( "Failed to load MD3 resource - stream did not start with 'IDP3' MD3 identifier" );
}
// Read in header
//int version =
reader.ReadInt32( );
//string name =
ReadString( reader, MaxPathLength );
//int flags =
reader.ReadInt32( );
int numFrames = reader.ReadInt32( );
int numTags = reader.ReadInt32( );
int numSurfaces = reader.ReadInt32( );
//int numSkins =
reader.ReadInt32( );
int framesOffset = reader.ReadInt32( );
int tagsOffset = reader.ReadInt32( );
int surfacesOffset = reader.ReadInt32( );
//int eofOffset =
reader.ReadInt32( );
// TODO: Can load directly into mesh frame, tag and surface structures - don't do this intermediate step
ModelMesh mesh = new ModelMesh( model, part );
ReadFrames( reader, framesOffset, numFrames, mesh, transform );
ReadTags( reader, tagsOffset, numTags, numFrames, mesh, transform );
ReadSurfaces( source, reader, surfacesOffset, numSurfaces, numFrames, mesh, surfaceTextureTable, transform );
// TODO: REMOVE. test frames
string md3Name = md3Source.ToString( );
if ( md3Name.IndexOf( "Upper" ) != -1 )
{
mesh.DefaultFrame = 151;
}
else if ( md3Name.IndexOf( "Head" ) != -1 )
{
mesh.DefaultFrame = 0;
}
else
{
mesh.DefaultFrame = 0;
}
return mesh;
}
}
