/*******************************************************************************
 * Copyright 2011 See AUTHORS file.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 ******************************************************************************/

package com.badlogic.gdx.graphics.g3d.utils.shapebuilders;

import com.badlogic.gdx.graphics.Color;
import com.badlogic.gdx.graphics.g3d.utils.MeshPartBuilder;
import com.badlogic.gdx.graphics.g3d.utils.MeshPartBuilder.VertexInfo;
import com.badlogic.gdx.math.Matrix4;
import com.badlogic.gdx.math.Vector3;
import com.badlogic.gdx.utils.Array;
import com.badlogic.gdx.utils.FlushablePool;
import com.badlogic.gdx.utils.Pool;
import com.badlogic.gdx.utils.ShortArray;

/** This class allows to reduce the static allocation needed for shape builders. It contains all the objects used internally by
 * shape builders.
 * @author realitix, xoppa */
public class BaseShapeBuilder {
	/* Color */
	protected static final Color tmpColor0 = new Color();
	protected static final Color tmpColor1 = new Color();
	protected static final Color tmpColor2 = new Color();
	protected static final Color tmpColor3 = new Color();
	protected static final Color tmpColor4 = new Color();

	/* Vector3 */
	protected static final Vector3 tmpV0 = new Vector3();
	protected static final Vector3 tmpV1 = new Vector3();
	protected static final Vector3 tmpV2 = new Vector3();
	protected static final Vector3 tmpV3 = new Vector3();
	protected static final Vector3 tmpV4 = new Vector3();
	protected static final Vector3 tmpV5 = new Vector3();
	protected static final Vector3 tmpV6 = new Vector3();
	protected static final Vector3 tmpV7 = new Vector3();
	
	/* VertexInfo */
	protected static final VertexInfo vertTmp0 = new VertexInfo();
	protected static final VertexInfo vertTmp1 = new VertexInfo();
	protected static final VertexInfo vertTmp2 = new VertexInfo();
	protected static final VertexInfo vertTmp3 = new VertexInfo();
	protected static final VertexInfo vertTmp4 = new VertexInfo();
	protected static final VertexInfo vertTmp5 = new VertexInfo();
	protected static final VertexInfo vertTmp6 = new VertexInfo();
	protected static final VertexInfo vertTmp7 = new VertexInfo();
	protected static final VertexInfo vertTmp8 = new VertexInfo();
	
	/* Matrix4 */
	protected static final Matrix4 matTmp1 = new Matrix4();
	
	private final static FlushablePool<Vector3> vectorPool = new FlushablePool<Vector3>() {
		@Override
		protected Vector3 newObject () {
			return new Vector3();
		}
	};

	private final static FlushablePool<Matrix4> matrices4Pool = new FlushablePool<Matrix4>() {
		@Override
		protected Matrix4 newObject () {
			return new Matrix4();
		}
	};

	/** Obtain a temporary {@link Vector3} object, must be free'd using {@link #freeAll()}. */
	protected static Vector3 obtainV3 () {
		return vectorPool.obtain();
	}

	/** Obtain a temporary {@link Matrix4} object, must be free'd using {@link #freeAll()}. */
	protected static Matrix4 obtainM4 () {
		final Matrix4 result = matrices4Pool.obtain();
		return result;
	}

	/** Free all objects obtained using one of the `obtainXX` methods. */
	protected static void freeAll () {
		vectorPool.flush();
		matrices4Pool.flush();
	}
}