Method parseMTL

core/src/processing/core/PShapeOBJ.java:320–389

(PApplet parent, String mtlfn, String path,
                                 BufferedReader reader,
                                 ArrayList<OBJMaterial> materials,
                                 Map<String, Integer> materialsHash)

  static protected void parseMTL(PApplet parent, String mtlfn, String path,
                                 BufferedReader reader,
                                 ArrayList<OBJMaterial> materials,
                                 Map<String, Integer> materialsHash) {
    try {
      String line;
      OBJMaterial currentMtl = null;
      while ((line = reader.readLine()) != null) {
        // Parse the line
        line = line.trim();
        String parts[] = line.split("\\s+");
        if (parts.length > 0) {
          // Extract the material data.
          if (parts[0].equals("newmtl")) {
            // Starting new material.
            String mtlname = parts[1];
            currentMtl = addMaterial(mtlname, materials, materialsHash);
          } else {
            if (currentMtl == null) {
              currentMtl = addMaterial("material" + materials.size(),
                                       materials, materialsHash);
            }
            if (parts[0].equals("map_Kd") && parts.length > 1) {
              // Loading texture map.
              String texname = parts[1];
              if (texname.indexOf(File.separator) == -1 && !path.equals("")) {
                // Relative file name, adding the base path.
                texname = path + File.separator + texname;
              }

              File file = new File(parent.dataPath(texname));
              if (file.exists()) {
                currentMtl.kdMap = parent.loadImage(texname);
              } else {
                System.err.println("The texture map \"" + texname + "\" " +
                  "in the materials definition file \"" + mtlfn + "\" " +
                  "is missing or inaccessible, make sure " +
                  "the URL is valid or that the file has been " +
                  "added to your sketch and is readable.");
              }
            } else if (parts[0].equals("Ka") && parts.length > 3) {
              // The ambient color of the material
              currentMtl.ka.x = Float.valueOf(parts[1]).floatValue();
              currentMtl.ka.y = Float.valueOf(parts[2]).floatValue();
              currentMtl.ka.z = Float.valueOf(parts[3]).floatValue();
            } else if (parts[0].equals("Kd") && parts.length > 3) {
              // The diffuse color of the material
              currentMtl.kd.x = Float.valueOf(parts[1]).floatValue();
              currentMtl.kd.y = Float.valueOf(parts[2]).floatValue();
              currentMtl.kd.z = Float.valueOf(parts[3]).floatValue();
            } else if (parts[0].equals("Ks") && parts.length > 3) {
              // The specular color weighted by the specular coefficient
              currentMtl.ks.x = Float.valueOf(parts[1]).floatValue();
              currentMtl.ks.y = Float.valueOf(parts[2]).floatValue();
              currentMtl.ks.z = Float.valueOf(parts[3]).floatValue();
            } else if ((parts[0].equals("d") ||
                        parts[0].equals("Tr")) && parts.length > 1) {
              // Reading the alpha transparency.