/* * 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() { } }