一点对m3g模型文件解析的工作
因为最近不会在m3g文件上继续工作，把之前一点少少的工作放出来，希望可以有点帮助/* * Main.java * * Created on 2005年5月15日, 下午11:41 */package m3gloader;import java.io.*;import java.util.zip.*;/** * * @author admin */public class Main { /** Creates a new instance of Main */ public Main() { } /** * @param args the command line arguments */ public static void main(String[] args) throws Exception { File f=new File("otokka_jump2.m3g"); System.out.println("\nFile \""+f.toString()+"\" exists? : "+f.exists()); if(!f.exists()) err("File "+f.toString()+" does not exists!"); FileInputStream fis=new FileInputStream(f); M3GDataInputStream dis=new M3GDataInputStream(fis); System.out.println("====== File identifier ======"); byte[] fileIdentifier=new byte; if(dis.available()>=12){ dis.read(fileIdentifier); System.out.println("File Identifier is: "); for(int l=0;l<fileIdentifier.length;l++) System.out.print(fileIdentifier+" "); System.out.print("\nFile Identifier characters is: \n"); System.out.println(new String(fileIdentifier)); System.out.println("====== end of file identifier ======\n"); } else err("File Identifier Error! "); /* Section 0: Header Object */ System.out.println("====== Section 0: Header Object ======"); if(dis.available()<5) err("Section 0: Header error! "); System.out.println("CompressionScheme: "+dis.readByte()); UInt32 totalSectionLength=dis.readUInt32(); //We have read 5 bytes.So we just check if (totalSectionLength.longvalue()-5) is available. if(dis.available()<totalSectionLength.longvalue()-5) err("Section 0: Content error! "); System.out.println("TotalSectionLength: "+totalSectionLength); System.out.println("UncompressedLength: "+dis.readUInt32()); System.out.println("$$$$$$ Objects $$$$$$"); System.out.println("ObjectType: "+dis.readByte()); //length1 is the length of 1st object we load, length2 is the 2nd. UInt32 length1=dis.readUInt32(); System.out.println("Length: "+length1); System.out.print("VersionNumber: "); System.out.print(dis.readByte()+"."); System.out.println(dis.readByte()); System.out.println("hasExternalReferences: "+dis.readBoolean()); System.out.println("TotalFileSize: "+dis.readUInt32()); System.out.println("ApproximateContentSize: "+dis.readUInt32()); /* Head Object contain: Byte VersionNumber Boolean hasExternalReferences UInt32TotalFileSize UInt32ApproximateContentSize StringAuthoringField So AuthoringField's length is object (length-11) */ byte[] authoringField=new byte; dis.readFully(authoringField); System.out.println("------ AuthoringField ------"); System.out.println(new String(authoringField,"UTF-8")); System.out.println("------ End of AuthoringField ------"); System.out.println("$$$$$$ End of Objects $$$$$$"); System.out.println("Checksum: "+dis.readUInt32()); System.out.println("====== End of Section 0: Header Object ======\n"); //new section System.out.println(dis.readByte()); System.out.println(dis.readUInt32()); System.out.println(dis.readUInt32()); M3GInflaterInputStream iis=new M3GInflaterInputStream(fis); System.out.println(iis.read()); System.out.println(iis.readUInt32()); /////////////////////a camera //user id System.out.println(iis.readUInt32()); //animation track System.out.println(iis.readUInt32()); //user para System.out.println(iis.readUInt32()); //hasComponentTransform; System.out.println(iis.read()); //hasGeneralTransform; System.out.println(iis.read()); //enable rendering System.out.println(iis.read()); // enablePicking; System.out.println(iis.read()); // alphaFactor; System.out.println(iis.read()); //scope; System.out.println(iis.readUInt32()); //hasAlignment; System.out.println(iis.read()); //h System.out.println(iis.read()); System.out.println(iis.readUInt32()); System.out.println(iis.readUInt32()); System.out.println(iis.readUInt32()); System.out.println(iis.readUInt32()); /////////////next object///////////////////// //image 2d System.out.println(iis.read()); System.out.println(iis.readUInt32()); //user id System.out.println(iis.readUInt32()); //animation tracks System.out.println(iis.readUInt32()); //user object System.out.println(iis.readUInt32()); //format System.out.println(iis.read()); //is mutable System.out.println(iis.read()); //width System.out.println(iis.readUInt32()); //height System.out.println(iis.readUInt32()); //palette; System.out.println(iis.read()); //pixels; System.out.println(iis.read()); /* for(int l=0;l<4894;l++) iis.read(); System.out.println(iis.read()); System.out.println(iis.readUInt32()); for(int l=0;l<40;l++) iis.read(); System.out.println(iis.read()); System.out.println(iis.readUInt32()); for(int l=0;l<66;l++) iis.read(); System.out.println(iis.read()); System.out.println(iis.readUInt32()); for(int l=0;l<66;l++) iis.read(); System.out.println(iis.read()); System.out.println(iis.readUInt32()); for(int l=0;l<66;l++) iis.read(); System.out.println(iis.read()); System.out.println(iis.readUInt32()); for(int l=0;l<41;l++) iis.read(); System.out.println(iis.read()); System.out.println(iis.readUInt32()); for(int l=0;l<29;l++) iis.read(); System.out.println(iis.read()); System.out.println(iis.readUInt32()); for(int l=0;l<25;l++) iis.read(); System.out.println(iis.read()); System.out.println(iis.readUInt32()); for(int l=0;l<68;l++) iis.read(); System.out.println(iis.read()); System.out.println(iis.readUInt32()); */ dis.close(); fis.close(); } public static void err(String msg){ System.out.println("\n**** An error has occured!!! The program was terminated!!! The errot infomation is: "); System.out.println(msg+"\n"); System.exit(0); } static class M3GDataInputStream extends DataInputStream{ public M3GDataInputStream(InputStream in){ super(in); } public UInt32 readUInt32() throws IOException { int ch1 = in.read(); int ch2 = in.read(); int ch3 = in.read(); long ch4 = in.read(); //System.out.println(ch1+" "+ch2+" "+ch3+" "+ch4); if ((ch1 | ch2 | ch3 | ch4) < 0) throw new EOFException(); return new UInt32((ch1 << 0) + (ch2 << 8) + (ch3 << 16) + (ch4 << 24)); } } static class M3GInflaterInputStream extends InflaterInputStream{ public M3GInflaterInputStream(InputStream in){ super(in,new Inflater(),32); } public UInt32 readUInt32() throws IOException { int ch1 = super.read(); int ch2 = super.read(); int ch3 = super.read(); long ch4 = super.read(); //System.out.println(ch1+" "+ch2+" "+ch3+" "+ch4); if ((ch1 | ch2 | ch3 | ch4) < 0) throw new EOFException(); return new UInt32((ch1 << 0) + (ch2 << 8) + (ch3 << 16) + (ch4 << 24)); } } static class Float32{ } static class UInt32{ private long value; public UInt32(long value){ this.value=value; Integer f=new Integer(2); } public long longvalue(){ return value; } public int intvalue(){ if(value > 2147483647 && value < -2147483648) throw new ClassCastException(); return (int)value; } public String toString(){ return Long.toString(value); } }}
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