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.meshdata;
  
  import java.io.IOException;
  import java.util.List;
  
  import static org.lwjgl.opengl.GL11.GL_UNSIGNED_BYTE;
  import static org.lwjgl.opengl.GL11.glBindTexture;
  import static org.lwjgl.opengl.GL11.glTexParameteri;
  import static org.lwjgl.opengl.GL11C.GL_LINEAR;
  import static org.lwjgl.opengl.GL11C.GL_TEXTURE_MAG_FILTER;
  import static org.lwjgl.opengl.GL11C.GL_TEXTURE_MIN_FILTER;
  import static org.lwjgl.opengl.GL11C.GL_TEXTURE_WRAP_S;
  import static org.lwjgl.opengl.GL11C.GL_TEXTURE_WRAP_T;
  import static org.lwjgl.opengl.GL11C.glTexImage2D;
  import static org.lwjgl.opengl.GL12C.GL_CLAMP_TO_EDGE;
  import static org.lwjgl.opengl.GL12C.GL_TEXTURE_WRAP_R;
  import static org.lwjgl.opengl.GL13C.GL_TEXTURE_CUBE_MAP;
  import static org.lwjgl.opengl.GL13C.GL_TEXTURE_CUBE_MAP_POSITIVE_X;
  import static org.lwjgl.opengl.GL13C.glActiveTexture;
  import static org.lwjgl.opengl.GL21C.GL_SRGB_ALPHA;
  
  import org.joml.Vector3f;
  
  public class CubemapTexture extends Texture {
  
  	public CubemapTexture(Vector3f colour, int textureUnit) {
  		super(colour, textureUnit, GL_CLAMP_TO_EDGE);
  	}
  
  	public CubemapTexture(List<String> paths, Vector3f colour, int textureUnit) {
  		this(colour, textureUnit);
  		for (int i = 0; i < paths.size(); i++) {
  			String path = paths.get(i);
  			try {
  				LoadedByteImage image = loadByteTextureFromFile(path, false);
  				glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + i, 0, GL_SRGB_ALPHA, image.width, image.height,
  						0, image.format, GL_UNSIGNED_BYTE, image.imageData);
  			} catch (IOException e) {
  				throw new RuntimeException(e);
  			}
  		}
  	}
  
  	@Override
  	protected void setHints(int textureWrap) {
  		glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
  		glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
  		glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_S, textureWrap);
  		glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_T, textureWrap);
  		glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_R, textureWrap);
  	}
  
  	@Override
  	public void bind() {
  		glActiveTexture(this.unit);
  		glBindTexture(GL_TEXTURE_CUBE_MAP, this.handle);
  	}
  
  	@Override
  	public void unbind() {
  		glBindTexture(GL_TEXTURE_CUBE_MAP, 0);
  	}
  }
  