content: /*
   * Copyright 2012, 2013 Hannes Janetzek
   * Copyright 2018 Gustl22
   *
   * This program is free software: you can redistribute it and/or modify it under the
   * terms of the GNU Lesser General Public License as published by the Free Software
   * Foundation, either version 3 of the License, or (at your option) any later version.
   *
   * This program is distributed in the hope that it will be useful, but WITHOUT ANY
   * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
   * PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public License along with
   * this program. If not, see <http://www.gnu.org/licenses/>.
   */
  package org.oscim.utils;
  
  import org.oscim.core.GeometryBuffer;
  import org.oscim.core.Tile;
  
  /**
   * A utility class with extrusion helper methods.
   */
  public final class ExtrusionUtils {
  
      public static final float REF_TILE_SIZE = 4096.0f; // Standard ref tile size
  
      /**
       * @param value       the height value
       * @param groundScale the ground scale of tile
       * @return the corresponding height in the specific tile
       */
      public static float mapGroundScale(float value, float groundScale) {
          /* match height with ground resolution (meter per pixel) */
          return value / (groundScale * 10); // 10 cm steps
      }
  
      /**
       * Map the raw buffer scale to scale of coordinates
       */
      public static void mapPolyCoordScale(GeometryBuffer buffer) {
          float tileScale = REF_TILE_SIZE / Tile.SIZE;
          float[] points = buffer.points;
          for (int pPos = 0; pPos < buffer.pointNextPos; pPos++) {
              points[pPos] = points[pPos] * tileScale;
          }
      }
  
      private ExtrusionUtils() {
      }
  }
  