?? load3ds.java
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{
normal.add( otherFace.normal );
noofNormals++;
}
}
if ( noofNormals != 1 )
{
normal.x /= noofNormals;
normal.y /= noofNormals;
normal.z /= noofNormals;
}
normal.normalize();
return normal;
}
//
// Read in the 2D texture coordinates - note these are
// only valid if planar mapping was used in 3DS.
//
void processTextureCoordinates( RandomAccessFile in )
throws IOException
{
int vertexCount = readUnsignedShort( in );
int i;
if ( vertexCount != noofVertices )
{
System.out.println( "** Number of texture vertices = #model vertices" );
return;
}
if ( verbosity > 1 )
{
System.out.println( " Texture coordinates: #" + vertexCount );
}
textureCoords = new Point2f[vertexCount];
for ( i = 0; i < vertexCount; i++ )
{
textureCoords[i] = new Point2f( readFloat( in ), readFloat( in ) );
//System.out.println( "== " + textureCoords[i] );
}
}
//
// Read in the definition of the ambient light.
//
void processAmbientLight( RandomAccessFile in )
throws IOException
{
Color3f ambient = readColor( in );
System.out.println( "Ambient Light: " + ambient );
}
//
// Read in a colour, either in the 3 * float format or
// the 3 * byte format.
//
Color3f readColor( RandomAccessFile in )
throws IOException
{
int tag = readUnsignedShort( in );
int length = readInt( in );
switch ( tag )
{
case S3D_COLOR_F:
return new Color3f( readFloat( in ), readFloat( in ), readFloat( in ) );
case S3D_COLOR_24:
return new Color3f( (float)in.readUnsignedByte() / 255,
(float)in.readUnsignedByte() / 255,
(float)in.readUnsignedByte() / 255 );
default:
throw new IOException( "COLOR_F/COLOR_24 expected" );
}
}
//
// Read in a float or int percentage and return it
// as a number between 0.0 and 1.0
//
float readPercentage( RandomAccessFile in )
throws IOException
{
int tag = readUnsignedShort( in );
int length = readInt( in );
switch ( tag )
{
case S3D_INT_PERCENTAGE:
return (float)readUnsignedShort( in ) / 100;
case S3D_FLOAT_PERCENTAGE:
return readFloat( in );
default:
throw new IOException( "INT_PERCENTAGE/FLOAT_PERCENTAGE expected" );
}
}
//
// Read in material name.
//
String readMatName( RandomAccessFile in )
throws IOException
{
int tag = readUnsignedShort( in );
int length = readInt( in );
return readName( in );
}
//
// Read in the string used to specify a name in
// many different chunks.
//
String readName( RandomAccessFile in )
throws IOException
{
StringBuffer buf = new StringBuffer();
char c;
while ( (c = (char)in.readUnsignedByte()) != '\0' )
{
buf.append( c );
}
return buf.toString();
}
//
// Read in an unsigned short (16 bits).
//
int readUnsignedShort( RandomAccessFile in )
throws IOException
{
int num = in.readUnsignedShort();
return ((num << 8) & 0xFF00) | ((num >> 8) & 0x00FF);
}
//
// Read in a 32 bit integer (unsigned).
//
int readInt( RandomAccessFile in )
throws IOException
{
int num = in.readInt();
return ((num << 24) & 0xFF000000) |
((num << 8) & 0x00FF0000) |
((num >> 8) & 0x0000FF00) |
((num >> 24) & 0x000000FF);
}
//
// Read in a 32 bit floating point number.
//
float readFloat( RandomAccessFile in )
throws IOException
{
return Float.intBitsToFloat( readInt( in ) );
}
//
// Internal data structure representing a polygon and
// when constructed updates a list of those faces
// sharing any given vertex.
//
class Face
{
int a, b, c;
Vector3f normal = null;
int group;
public Face( int vertexA, int vertexB, int vertexC )
{
a = vertexA;
b = vertexB;
c = vertexC;
normal = calculateFaceNormal( a, b, c );
sharedFaces[a].addElement( this );
sharedFaces[b].addElement( this );
sharedFaces[c].addElement( this );
}
public Point3f a()
{
return vertices[a];
}
public Point3f b()
{
return vertices[b];
}
public Point3f c()
{
return vertices[c];
}
};
//
// Internal data structure for representing a surface
// as a list of faces.
//
class Surface
{
Vector faces = new Vector();
public Surface()
{
}
public void add( Face f )
{
faces.addElement( f );
}
public Enumeration faces()
{
return faces.elements();
}
public int noofFaces()
{
return faces.size();
}
}
//
// List of chunks contained in a .3DS file that we
// are interested in.
//
// .3DS file magic number
static final int S3D_M3DMAGIC = 0x4d4d;
// Tag IDs
static final int S3D_MMAGIC = 0x3d3d;
static final int S3D_MESH_VERSION = 0x0001;
static final int S3D_M3D_VERSION = 0x0002;
static final int S3D_COLOR_F = 0x0010;
static final int S3D_COLOR_24 = 0x0011;
static final int S3D_INT_PERCENTAGE = 0x0030;
static final int S3D_FLOAT_PERCENTAGE = 0x0031;
static final int S3D_MASTER_SCALE = 0x0100;
static final int S3D_BIT_MAP = 0x1100;
static final int S3D_USE_BIT_MAP = 0x1101;
static final int S3D_SOLID_BGND = 0x1200;
static final int S3D_USE_SOLID_BGND = 0x1201;
static final int S3D_V_GRADIENT = 0x1300;
static final int S3D_USE_V_GRADIENT = 0x1301;
static final int S3D_LO_SHADOW_BIAS = 0x1400;
static final int S3D_HI_SHADOW_BIAS = 0x1410;
static final int S3D_SHADOW_MAP_SIZE = 0x1420;
static final int S3D_SHADOW_SAMPLES = 0x1430;
static final int S3D_SHADOW_RANGE = 0x1440;
static final int S3D_AMBIENT_LIGHT = 0x2100;
static final int S3D_FOG = 0x2200;
static final int S3D_USE_FOG = 0x2201;
static final int S3D_FOG_BGND = 0x2210;
static final int S3D_DISTANCE_CUE = 0x2300;
static final int S3D_USE_DISTANCE_CUE = 0x2301;
static final int S3D_DCUE_BGND = 0x2310;
static final int S3D_DEFAULT_VIEW = 0x3000;
static final int S3D_VIEW_TOP = 0x3010;
static final int S3D_VIEW_BOTTOM = 0x3020;
static final int S3D_VIEW_LEFT = 0x3030;
static final int S3D_VIEW_RIGHT = 0x3040;
static final int S3D_VIEW_FRONT = 0x3050;
static final int S3D_VIEW_BACK = 0x3060;
static final int S3D_VIEW_USER = 0x3070;
static final int S3D_VIEW_CAMERA = 0x3080;
static final int S3D_VIEW_WINDOW = 0x3090;
static final int S3D_NAMED_OBJECT = 0x4000;
static final int S3D_OBJ_HIDDEN = 0x4010;
static final int S3D_OBJ_VIS_LOFTER = 0x4011;
static final int S3D_OBJ_DOESNT_CAST = 0x4012;
static final int S3D_OBJ_MATTE = 0x4013;
static final int S3D_N_TRI_OBJECT = 0x4100;
static final int S3D_POINT_ARRAY = 0x4110;
static final int S3D_POINT_FLAG_ARRAY = 0x4111;
static final int S3D_FACE_ARRAY = 0x4120;
static final int S3D_MSH_MAT_GROUP = 0x4130;
static final int S3D_TEX_VERTS = 0x4140;
static final int S3D_SMOOTH_GROUP = 0x4150;
static final int S3D_MESH_MATRIX = 0x4160;
static final int S3D_N_DIRECT_LIGHT = 0x4600;
static final int S3D_DL_SPOTLIGHT = 0x4610;
static final int S3D_DL_OFF = 0x4620;
static final int S3D_DL_SHADOWED = 0x4630;
static final int S3D_N_CAMERA = 0x4700;
// Material file Chunk IDs
static final int S3D_MAT_ENTRY = 0xafff;
static final int S3D_MAT_NAME = 0xa000;
static final int S3D_MAT_AMBIENT = 0xa010;
static final int S3D_MAT_DIFFUSE = 0xa020;
static final int S3D_MAT_SPECULAR = 0xa030;
static final int S3D_MAT_SHININESS = 0xa040;
static final int S3D_MAT_SHININESS_STRENGTH = 0xa041;
static final int S3D_MAT_TRANSPARENCY = 0xa050;
static final int S3D_MAT_WIRE = 0xa085;
static final int S3D_MAT_WIRESIZE = 0xa087;
static final int S3D_MAT_SELF_ILLUM = 0xa080;
static final int S3D_MAT_TWO_SIDE = 0xa081;
static final int S3D_MAT_DECAL = 0xa082;
static final int S3D_MAT_ADDITIVE = 0xa083;
static final int S3D_MAT_SHADING = 0xa100;
static final int S3D_MAT_TEXMAP = 0xa200;
static final int S3D_MAT_OPACMAP = 0xa210;
static final int S3D_MAT_REFLMAP = 0xa220;
static final int S3D_MAT_BUMPMAP = 0xa230;
static final int S3D_MAT_MAPNAME = 0xa300;
// Reverse engineered hierarchy information
static final int S3D_HIERARCHY = 0xb000;
static final int S3D_HIERARCHY_NODE = 0xb002;
static final int S3D_HIERARCHY_LINK = 0xb010;
static final int S3D_INSTANCE_NAME = 0xb011;
static final int S3D_PIVOT = 0xb013;
static final int S3D_POS_TRACK_TAG = 0xb020;
static final int S3D_ROT_TRACK_TAG = 0xb021;
static final int S3D_SCL_TRACK_TAG = 0xb022;
static final int S3D_NODE_ID = 0xb030;
static final int S3D_OBJECT_LINK_NULL = 0xffff;
// Dummy Chunk ID
static final int S3D_DUMMY_CHUNK = 0xffff;
// These chunks are found in the .PRJ file (only as far as I know)
static final int S3D_PROJECT_FILE = 0xc23d;
static final int S3D_MAPPING_RETILE = 0xc4b0;
static final int S3D_MAPPING_CENTRE = 0xc4c0;
static final int S3D_MAPPING_SCALE = 0xc4d0;
static final int S3D_MAPPING_ORIENTATION = 0xc4e1;
}
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