Android Open Source - jmini3d Obj2 Class

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License

The source code is released under:

Copyright 2012 Mobialia http://www.mobialia.com/ Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to ...

Java Source Code

package jmini3d.utils;
/*  w ww. j a  va2s  .c om*/
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;

public class Obj2Class {
  
  ArrayList<String> vertexList = new ArrayList<String>();
  ArrayList<String> normalsList = new ArrayList<String>();
  ArrayList<String> uvsList = new ArrayList<String>();
  ArrayList<String> facesList = new ArrayList<String>();
  
  StringBuffer vertexSB = new StringBuffer();
  StringBuffer normalsSB = new StringBuffer();
  StringBuffer uvsSB = new StringBuffer();
  StringBuffer facesSB = new StringBuffer();
  

  public static void main(String args[]) {
    if (args.length < 3) {
      System.out.println("Usage: Obj2Class file.obj file.java com.package.name");
      System.out.println("Converts an OBJ file to a jmini3d geometry in a Java file");
      return;
    }
    Obj2Class obj2Class = new Obj2Class();
    
    obj2Class.process(args[0], args[1], args[2]);
  }

  public void process(String inFile, String outFile, String packageName) {
    
    File file = new File(inFile);
    try {
      FileReader fr = new FileReader(file);
      BufferedReader br = new BufferedReader(fr);
      
      String line;
      
      while ((line = br.readLine()) != null) {
      
        String tokens[] = line.split("\\s|/");
        
//        System.out.println("line = " + line);
//        System.out.println("token = " + tokens[0]);
        
        if ("v".equals(tokens[0])) {
          vertexList.add(tokens[1] + "f, " + tokens[2] + "f, " + tokens[3] + "f");
        } else if ("vn".equals(tokens[0])) {
          normalsList.add(tokens[1] + "f, " + tokens[2] + "f, " + tokens[3] + "f");
        } else if ("vt".equals(tokens[0])) {
          uvsList.add(tokens[1] + "f, " + (1f - Float.parseFloat(tokens[2])) + "f");
        } else if ("f".equals(tokens[0])) {
          if (facesSB.length() > 0) {
            facesSB.append(", ");
          }

          facesSB.append(addVertexNormalUv(tokens[1], tokens[2], tokens[3]));
          facesSB.append(", ");
          facesSB.append(addVertexNormalUv(tokens[4], tokens[5], tokens[6]));
          facesSB.append(", ");
          facesSB.append(addVertexNormalUv(tokens[7], tokens[8], tokens[9]));
        }
      }
      
      br.close();
      System.out.println("Vertex size=" + vertexList.size());
      System.out.println("Normals size=" + normalsList.size());
      System.out.println("Uvs size=" + uvsList.size());
      System.out.println("FaceList (vertex+normals+uvs) size=" + facesList.size());
      //System.out.println(vertexSB.toString());
      //System.out.println(normalsSB.toString());
      //System.out.println(uvsSB.toString());
      //System.out.println(facesSB.toString());
      
      writeFile(packageName, outFile);
      
    } catch (Exception e) {
      e.printStackTrace();
    }
  }

  public int addVertexNormalUv(String vertexIndex, String uvIndex, String normalIndex) {
    String key = vertexIndex + "/" + normalIndex + "/" + uvIndex;

    Integer vertexInt = Integer.valueOf(vertexIndex);
    Integer uvInt = "".equals(uvIndex) ? -1 : Integer.valueOf(uvIndex);
    Integer normalInt = Integer.valueOf(normalIndex);

    if (!facesList.contains(key)) {
      if (vertexSB.length() > 0) {
        vertexSB.append(", ");
        normalsSB.append(", ");
        if (uvInt != -1) {
          uvsSB.append(", ");
        }
      }
      vertexSB.append(vertexList.get(vertexInt - 1));
      normalsSB.append(normalsList.get(normalInt - 1));
      if (uvInt != -1) {
        uvsSB.append(uvsList.get(uvInt - 1));
      }

      facesList.add(key);
    }

    return facesList.indexOf(key);
  }
  
  
  public void writeFile(String packageName, String fileName) {
    StringBuilder sb = new StringBuilder();

    String className = fileName.substring(fileName.lastIndexOf("/") + 1).replace(".java", "");
    
    System.out.println(className);
    
    sb.append("package ").append(packageName).append(";\n");
    sb.append("import jmini3d.geometry.Geometry;");

    sb.append("\n");
    sb.append("public class ").append(className).append(" extends Geometry {\n");
    sb.append("\n");

    sb.append("public float[] vertex() {\n");
    sb.append("    final float vertex[] = {\n");
    sb.append(vertexSB);
    sb.append("    };\n");
    sb.append("    return vertex;\n");
    sb.append("}\n");

    sb.append("public float[] normals() {\n");
    sb.append("    final float normals[] = {\n");
    sb.append(normalsSB);
    sb.append("    };\n");
    sb.append("    return normals;\n");
    sb.append("}\n");

    if (uvsList.size() > 0) {
      sb.append("public float[] uvs() {\n");
      sb.append("    final float uvs[] = {\n");
      sb.append(uvsSB);
      sb.append("    };\n");
      sb.append("    return uvs;\n");
      sb.append("}\n");
    } else {
      sb.append("public float[] uvs() {\n");
      sb.append("    return null;\n");
      sb.append("}\n");
    }

    sb.append("public short[] faces() {\n");
    sb.append("    final short faces[] = {\n");
    sb.append(facesSB);
    sb.append("    };\n");
    sb.append("    return faces;\n");
    sb.append("}\n");
    sb.append("}\n");

    File file = new File(fileName);
    if (file.exists()) {
      file.delete();
    }
    try {
      file.createNewFile();
      FileWriter fos = new FileWriter(file);
      fos.append(sb.toString());
      fos.close();
    } catch (IOException e) {
      e.printStackTrace();
    }
  }
  
}

Java Source Code List

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