1 /* 2 * Copyright (C) 2008 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.example.android.apis.graphics.kube; 18 19 import java.nio.ByteBuffer; 20 import java.nio.ByteOrder; 21 import java.nio.IntBuffer; 22 import java.nio.ShortBuffer; 23 import java.util.Iterator; 24 import java.util.ArrayList; 25 26 import javax.microedition.khronos.opengles.GL10; 27 28 public class GLWorld { 29 30 public void addShape(GLShape shape) { 31 mShapeList.add(shape); 32 mIndexCount += shape.getIndexCount(); 33 } 34 35 public void generate() { 36 ByteBuffer bb = ByteBuffer.allocateDirect(mVertexList.size()*4*4); 37 bb.order(ByteOrder.nativeOrder()); 38 mColorBuffer = bb.asIntBuffer(); 39 40 bb = ByteBuffer.allocateDirect(mVertexList.size()*4*3); 41 bb.order(ByteOrder.nativeOrder()); 42 mVertexBuffer = bb.asIntBuffer(); 43 44 bb = ByteBuffer.allocateDirect(mIndexCount*2); 45 bb.order(ByteOrder.nativeOrder()); 46 mIndexBuffer = bb.asShortBuffer(); 47 48 Iterator<GLVertex> iter2 = mVertexList.iterator(); 49 while (iter2.hasNext()) { 50 GLVertex vertex = iter2.next(); 51 vertex.put(mVertexBuffer, mColorBuffer); 52 } 53 54 Iterator<GLShape> iter3 = mShapeList.iterator(); 55 while (iter3.hasNext()) { 56 GLShape shape = iter3.next(); 57 shape.putIndices(mIndexBuffer); 58 } 59 } 60 61 public GLVertex addVertex(float x, float y, float z) { 62 GLVertex vertex = new GLVertex(x, y, z, mVertexList.size()); 63 mVertexList.add(vertex); 64 return vertex; 65 } 66 67 public void transformVertex(GLVertex vertex, M4 transform) { 68 vertex.update(mVertexBuffer, transform); 69 } 70 71 int count = 0; 72 public void draw(GL10 gl) 73 { 74 mColorBuffer.position(0); 75 mVertexBuffer.position(0); 76 mIndexBuffer.position(0); 77 78 gl.glFrontFace(GL10.GL_CW); 79 gl.glShadeModel(GL10.GL_FLAT); 80 gl.glVertexPointer(3, GL10.GL_FIXED, 0, mVertexBuffer); 81 gl.glColorPointer(4, GL10.GL_FIXED, 0, mColorBuffer); 82 gl.glDrawElements(GL10.GL_TRIANGLES, mIndexCount, GL10.GL_UNSIGNED_SHORT, mIndexBuffer); 83 count++; 84 } 85 86 static public float toFloat(int x) { 87 return x/65536.0f; 88 } 89 90 private ArrayList<GLShape> mShapeList = new ArrayList<GLShape>(); 91 private ArrayList<GLVertex> mVertexList = new ArrayList<GLVertex>(); 92 93 private int mIndexCount = 0; 94 95 private IntBuffer mVertexBuffer; 96 private IntBuffer mColorBuffer; 97 private ShortBuffer mIndexBuffer; 98 } 99
