61 lines
2.0 KiB
Java
61 lines
2.0 KiB
Java
/*
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* Copyright (C) 2007 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.globaltime;
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import javax.microedition.khronos.opengles.GL10;
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/**
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* A class representing a set of GL_POINT objects. GlobalTime uses this class
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* to draw city lights on the night side of the earth.
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*/
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public class PointCloud extends Shape {
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/**
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* Constructs a PointCloud with a point at each of the given vertex
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* (x, y, z) positions.
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* @param vertices an array of (x, y, z) positions given in fixed-point.
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*/
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public PointCloud(int[] vertices) {
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this(vertices, 0, vertices.length);
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}
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/**
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* Constructs a PointCloud with a point at each of the given vertex
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* (x, y, z) positions.
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* @param vertices an array of (x, y, z) positions given in fixed-point.
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* @param off the starting offset of the vertices array
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* @param len the number of elements of the vertices array to use
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*/
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public PointCloud(int[] vertices, int off, int len) {
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super(GL10.GL_POINTS, GL10.GL_UNSIGNED_SHORT,
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false, false, false);
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int numPoints = len / 3;
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short[] indices = new short[numPoints];
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for (int i = 0; i < numPoints; i++) {
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indices[i] = (short)i;
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}
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allocateBuffers(vertices, null, null, null, indices);
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this.mNumIndices = mIndexBuffer.capacity();
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}
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@Override public int getNumTriangles() {
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return mNumIndices * 2;
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}
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}
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