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File size: 2,711 Bytes
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/**
* SEA3D - o3dgc
* @author Sunag / http://www.sunag.com.br/
*/
'use strict';
//
// Lossy Compression
//
SEA3D.GeometryGC = function ( name, data, sea3d ) {
this.name = name;
this.data = data;
this.sea3d = sea3d;
var i;
var attrib = data.readUShort();
var uvIDs = [], jointID, weightID;
this.isBig = ( attrib & 1 ) != 0;
data.readVInt = this.isBig ? data.readUInt : data.readUShort;
// Geometry Flags
// ..
// 1 isBig
// 2 groups
// 4 uv
// 8 tangent
// 16 colors
// 32 joints
// 64 morph
// 128 vertex-animation
// ..
if ( attrib & 2 ) {
this.groups = [];
var numGroups = data.readUByte(),
groupOffset = 0;
for ( i = 0; i < numGroups; i ++ ) {
var groupLength = data.readVInt() * 3;
this.groups.push( {
start: groupOffset,
count: groupLength,
} );
groupOffset += groupLength;
}
} else {
this.groups = [];
}
if ( attrib & 4 ) {
this.uv = [];
var uvCount = data.readUByte();
for ( i = 0; i < uvCount; i ++ ) {
uvIDs[ i ] = data.readUByte();
}
}
if ( attrib & 32 ) {
jointID = data.readUByte();
weightID = data.readUByte();
}
var size = data.readUInt();
var bytes = data.concat( data.position, size );
var bstream = new o3dgc.BinaryStream( bytes.buffer );
var decoder = new o3dgc.SC3DMCDecoder();
var ifs = new o3dgc.IndexedFaceSet();
decoder.DecodeHeader( ifs, bstream );
var numIndexes = ifs.GetNCoordIndex();
var numVertex = ifs.GetNCoord();
if ( ! this.groups.length ) this.groups.push( { start: 0, count: numIndexes * 3 } );
this.indexes = this.isBig ? new Uint32Array( numIndexes * 3 ) : new Uint16Array( numIndexes * 3 );
this.vertex = new Float32Array( numVertex * 3 );
ifs.SetCoordIndex( this.indexes );
ifs.SetCoord( this.vertex );
if ( ifs.GetNNormal() > 0 ) {
this.normal = new Float32Array( numVertex * 3 );
ifs.SetNormal( this.normal );
}
for ( i = 0; i < uvIDs.length; i ++ ) {
this.uv[ i ] = new Float32Array( numVertex * 2 );
ifs.SetFloatAttribute( uvIDs[ i ], this.uv[ i ] );
}
if ( jointID !== undefined ) {
this.jointPerVertex = ifs.GetIntAttributeDim( jointID );
this.joint = new Uint16Array( numVertex * this.jointPerVertex );
this.weight = new Float32Array( numVertex * this.jointPerVertex );
ifs.SetIntAttribute( jointID, this.joint );
ifs.SetFloatAttribute( weightID, this.weight );
}
// decode mesh
decoder.DecodePlayload( ifs, bstream );
};
SEA3D.GeometryGC.prototype.type = "s3D";
//
// Extension
//
THREE.SEA3D.EXTENSIONS_LOADER.push( {
setTypeRead: function () {
this.file.addClass( SEA3D.GeometryGC, true );
this.file.typeRead[ SEA3D.GeometryGC.prototype.type ] = this.readGeometryBuffer;
}
} );
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