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    1   /*
    2    * Licensed to the Apache Software Foundation (ASF) under one or more
    3    * contributor license agreements.  See the NOTICE file distributed with
    4    * this work for additional information regarding copyright ownership.
    5    * The ASF licenses this file to You under the Apache License, Version 2.0
    6    * (the "License"); you may not use this file except in compliance with
    7    * the License.  You may obtain a copy of the License at
    8    *
    9    *      http://www.apache.org/licenses/LICENSE-2.0
    10   *
    11   * Unless required by applicable law or agreed to in writing, software
    12   * distributed under the License is distributed on an "AS IS" BASIS,
    13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    14   * See the License for the specific language governing permissions and
    15   * limitations under the License.
    16   */
    17  package org.apache.commons.geometry.examples.io.threed.obj;
    18
    19  import java.nio.charset.Charset;
    20  import java.nio.charset.StandardCharsets;
    21
    22  /** Class containing constants for use with OBJ files.
    23   */
    24  final class OBJConstants {
    25      /** Default OBJ charset. */
    26      static final Charset DEFAULT_CHARSET = StandardCharsets.UTF_8;
    27
    28      /** Character used to indicate the start of a comment line. */
    29      static final char COMMENT_START_CHAR = '#';
    30
    31      /** Keyword used to indicate a vertex definition line. */
    32      static final String VERTEX_KEYWORD = "v";
    33
    34      /** Keyword used to indicate a face definition line. */
    35      static final String FACE_KEYWORD = "f";
    36
    37      /** Keyword used to indicate a geometry group. */
    38      static final String GROUP_KEYWORD = "g";
    39
    40      /** Keyword used to associate a name with the following geometry. */
    41      static final String OBJECT_KEYWORD = "o";
    42
    43      /** Character used to separate face vertex indices from texture and normal indices. */
    44      static final char FACE_VALUE_SEP_CHAR = '/';
    45
    46      /** Utility class; no instantiation. */
    47      private OBJConstants() {}
    48  }