| /* |
| * Copyright (C) 2007 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.globaltime; |
| |
| import javax.microedition.khronos.opengles.GL10; |
| |
| /** |
| * A class representing a set of GL_POINT objects. GlobalTime uses this class |
| * to draw city lights on the night side of the earth. |
| */ |
| public class PointCloud extends Shape { |
| |
| /** |
| * Constructs a PointCloud with a point at each of the given vertex |
| * (x, y, z) positions. |
| * @param vertices an array of (x, y, z) positions given in fixed-point. |
| */ |
| public PointCloud(int[] vertices) { |
| this(vertices, 0, vertices.length); |
| } |
| |
| /** |
| * Constructs a PointCloud with a point at each of the given vertex |
| * (x, y, z) positions. |
| * @param vertices an array of (x, y, z) positions given in fixed-point. |
| * @param off the starting offset of the vertices array |
| * @param len the number of elements of the vertices array to use |
| */ |
| public PointCloud(int[] vertices, int off, int len) { |
| super(GL10.GL_POINTS, GL10.GL_UNSIGNED_SHORT, |
| false, false, false); |
| |
| int numPoints = len / 3; |
| short[] indices = new short[numPoints]; |
| for (int i = 0; i < numPoints; i++) { |
| indices[i] = (short)i; |
| } |
| |
| allocateBuffers(vertices, null, null, null, indices); |
| this.mNumIndices = mIndexBuffer.capacity(); |
| } |
| |
| @Override public int getNumTriangles() { |
| return mNumIndices * 2; |
| } |
| } |