Initial Contribution

samples/GlobalTime/src/com/android/globaltime/PointCloud.java

@@ -0,0 +1,60 @@
+/*
+ * 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;
+    }
+}