Android example source code file (MeshLibrary.java)

This example Android source code file (MeshLibrary.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Android by Example" ^TM.

Java - Android tags/keywords

arraylist, grid, meshlibrary, util

The MeshLibrary.java Android example source code

/*
 * Copyright (C) 2010 The Android Open Source Project
 *
 * 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.android.heightmapprofiler;

import java.util.ArrayList;

import javax.microedition.khronos.opengles.GL10;

// This is a central repository for all vertex arrays.  It handles
// generation and invalidation of VBOs from each mesh.

public class MeshLibrary {
	// This sample only has one type of mesh, Grid, but in a real game you might have
	// multiple types of objects managing vertex arrays (animated objects, objects loaded from
	// files, etc).  This class could easily be modified to work with some basic Mesh class
	// in that case.
	private ArrayList<Grid[]> mMeshes = new ArrayList();
	
	public int addMesh(Grid[] lods) {
		int index = mMeshes.size();
		mMeshes.add(lods);
		return index;
	}
	
	public Grid[] getMesh(int index) {
		Grid[] mesh = null;
		if (index >= 0 && index < mMeshes.size()) {
			mesh = mMeshes.get(index);
		}
		return mesh;
	}
	
	public void generateHardwareBuffers(GL10 gl) {
		final int count = mMeshes.size();
		for (int x = 0; x < count; x++) {
			Grid[] lods = mMeshes.get(x);
			assert lods != null;
			for (int y = 0; y < lods.length; y++) {
				Grid lod = lods[y];
				if (lod != null) {
					lod.invalidateHardwareBuffers();
					lod.generateHardwareBuffers(gl);
				}
			}
		}
	}
	
	public void freeHardwareBuffers(GL10 gl) {
		final int count = mMeshes.size();
		for (int x = 0; x < count; x++) {
			Grid[] lods = mMeshes.get(x);
			assert lods != null;
			for (int y = 0; y < lods.length; y++) {
				Grid lod = lods[y];
				if (lod != null) {
					lod.releaseHardwareBuffers(gl);
				}
			}
		}
	}
}