code: /*
   * Copyright (c) 2021 Callum Newlands
   *
   *     This program is free software: you can redistribute it and/or modify
   *     it under the terms of the GNU General Public License as published by
   *     the Free Software Foundation, either version 3 of the License, or
   *     (at your option) any later version.
   *
   *     The additional term of 7.b applies: Requiring preservation of specified
   *     reasonable legal notices or author attributions in that material or in the
   *     Appropriate Legal Notices displayed by works containing it
   *
   *     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 General Public License for more details.
   *
   *     You should have received a copy of the GNU General Public License
   *     along with this program.  If not, see <https://www.gnu.org/licenses/>.
   */
  
  package modeldata;
  
  import java.util.Map;
  import modeldata.meshdata.Mesh;
  import org.joml.Matrix4f;
  import rendering.LevelOfDetail;
  
  public class LODModel {
  
  	private final Map<LevelOfDetail, Model> models;
  
  	public LODModel(Map<LevelOfDetail, Model> models) {
  		this.models = models;
  	}
  
  	public void setModelMatrix(Matrix4f modelMat) {
  		for (Model m : models.values()) {
  			m.setModelMatrix(modelMat);
  		}
  	}
  
  	public void render(LevelOfDetail levelOfDetail, boolean renderForShadows) {
  		Model lodModel = models.get(levelOfDetail);
  		if (lodModel == null) {
  			switch (levelOfDetail) {
  				case HIGH -> lodModel = models.get(LevelOfDetail.LOW);
  				case LOW -> lodModel = models.get(LevelOfDetail.HIGH);
  				default -> throw new RuntimeException("Unhandled LOD: " + levelOfDetail);
  			}
  		}
  		for (Mesh mesh : lodModel.getMeshes()) {
  			mesh.render(renderForShadows);
  		}
  	}
  
  }
  