1 /* 2 * Copyright (C) 2006 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 android.opengl; 18 19 import java.io.BufferedReader; 20 import java.io.DataInputStream; 21 import java.io.InputStream; 22 import java.io.InputStreamReader; 23 import java.io.IOException; 24 import java.nio.ByteBuffer; 25 import java.nio.ByteOrder; 26 import java.nio.IntBuffer; 27 import java.util.ArrayList; 28 import java.util.HashMap; 29 import java.util.Iterator; 30 import java.util.List; 31 import java.util.Map; 32 import javax.microedition.khronos.opengles.*; 33 34 /** 35 * {@hide} 36 */ 37 public abstract class Object3D { 38 39 private boolean mHasTexcoords = false; 40 41 private float mBoundsMinX = Float.MAX_VALUE; 42 private float mBoundsMaxX = Float.MIN_VALUE; 43 private float mBoundsMinY = Float.MAX_VALUE; 44 private float mBoundsMaxY = Float.MIN_VALUE; 45 private float mBoundsMinZ = Float.MAX_VALUE; 46 private float mBoundsMaxZ = Float.MIN_VALUE; 47 48 private IntBuffer mVertexBuffer; 49 private IntBuffer mNormalBuffer; 50 private IntBuffer mTexcoordBuffer; 51 52 // All groups, by name 53 private Map<String, Group> mGroups; 54 55 // All materials, by name 56 private Map<String, Material> mMaterials; 57 58 // All texture maps, by name 59 private Map<String, Texture> mTextures; 60 61 public Object3D() { 62 reset(); 63 } 64 65 /** 66 * Override this method with an implementation that contructs 67 * and InputStream from the given filename. For example, if the 68 * source files are to be retrieved using an AssetManager, 69 * the implementation would use AssetManager.load() to 70 * get the input stream. 71 */ 72 public abstract InputStream readFile(String filename) throws IOException; 73 74 private void reset() { 75 mVertexBuffer = mNormalBuffer = mTexcoordBuffer = null; 76 77 mGroups = new HashMap<String,Group>(); 78 mMaterials = new HashMap<String,Material>(); 79 mTextures = new HashMap<String,Texture>(); 80 } 81 82 public Material getMaterial(String name) { 83 Material mat = mMaterials.get(name); 84 return mat; 85 } 86 87 public Texture getTexture(String name) { 88 return mTextures.get(name); 89 } 90 91 public IntBuffer getVertexBuffer() { 92 return mVertexBuffer; 93 } 94 95 public IntBuffer getNormalBuffer() { 96 return mNormalBuffer; 97 } 98 99 public IntBuffer getTexcoordBuffer() { 100 return mTexcoordBuffer; 101 } 102 103 public int getNumTriangles() { 104 int numTriangles = 0; 105 Iterator<Group> iter = mGroups.values().iterator(); 106 while (iter.hasNext()) { 107 numTriangles += iter.next().getNumTriangles(); 108 } 109 return numTriangles; 110 } 111 112 public boolean hasTexcoords() { 113 return mHasTexcoords; 114 } 115 116 public float getBoundsMinX() { 117 return mBoundsMinX; 118 } 119 120 public float getBoundsMaxX() { 121 return mBoundsMaxX; 122 } 123 124 public float getBoundsMinY() { 125 return mBoundsMinY; 126 } 127 128 public float getBoundsMaxY() { 129 return mBoundsMaxY; 130 } 131 132 public float getBoundsMinZ() { 133 return mBoundsMinZ; 134 } 135 136 public float getBoundsMaxZ() { 137 return mBoundsMaxZ; 138 } 139 140 public void loadTexture(String name) throws IOException { 141 InputStream is = readFile(name + ".raw"); 142 Texture texture = new Texture(is); 143 mTextures.put(name, texture); 144 } 145 146 private static void verifyByte(DataInputStream dis, int b) 147 throws IOException { 148 int x = dis.read() & 0xff; 149 if (x != b) { 150 throw new RuntimeException("Bad byte: " + 151 x + 152 " (expected " + b + ")"); 153 } 154 } 155 156 public void load(String filename) throws IOException { 157 reset(); 158 159 DataInputStream dis = new DataInputStream(readFile(filename)); 160 verifyByte(dis, 'g' + 128); 161 verifyByte(dis, 'l'); 162 verifyByte(dis, 'e'); 163 verifyByte(dis, 's'); 164 165 int numTuples = dis.readInt(); 166 167 this.mBoundsMinX = dis.readFloat(); 168 this.mBoundsMaxX = dis.readFloat(); 169 this.mBoundsMinY = dis.readFloat(); 170 this.mBoundsMaxY = dis.readFloat(); 171 this.mBoundsMinZ = dis.readFloat(); 172 this.mBoundsMaxZ = dis.readFloat(); 173 174 this.mHasTexcoords = dis.readInt() == 1; 175 176 int intsPerTuple = mHasTexcoords ? 8 : 6; 177 int numInts = numTuples*intsPerTuple; 178 179 int len = 4*numTuples*(mHasTexcoords ? 8 : 6); 180 181 byte[] tmp = new byte[len]; 182 int tidx = 0; 183 while (tidx < len) { 184 tidx += dis.read(tmp, tidx, len - tidx); 185 } 186 if (ByteOrder.nativeOrder() == ByteOrder.BIG_ENDIAN) { 187 for (int i = 0; i < len; i += 4) { 188 byte tmp0 = tmp[i]; 189 byte tmp1 = tmp[i + 1]; 190 byte tmp2 = tmp[i + 2]; 191 byte tmp3 = tmp[i + 3]; 192 tmp[i] = tmp3; 193 tmp[i + 1] = tmp2; 194 tmp[i + 2] = tmp1; 195 tmp[i + 3] = tmp0; 196 } 197 } 198 199 ByteBuffer allbb = ByteBuffer.allocateDirect(len); 200 allbb.order(ByteOrder.nativeOrder()); 201 allbb.put(tmp); 202 203 allbb.position(0); 204 allbb.limit(4*3*numTuples); 205 ByteBuffer vbb = allbb.slice(); 206 this.mVertexBuffer = vbb.asIntBuffer(); 207 mVertexBuffer.position(0); 208 209 if (mHasTexcoords) { 210 allbb.position(allbb.limit()); 211 allbb.limit(allbb.position() + 4*2*numTuples); 212 ByteBuffer tbb = allbb.slice(); 213 this.mTexcoordBuffer = tbb.asIntBuffer(); 214 mTexcoordBuffer.position(0); 215 } 216 217 allbb.position(allbb.limit()); 218 allbb.limit(allbb.position() + 4*3*numTuples); 219 ByteBuffer nbb = allbb.slice(); 220 this.mNormalBuffer = nbb.asIntBuffer(); 221 mNormalBuffer.position(0); 222 223 int numMaterials = dis.readInt(); 224 for (int i = 0; i < numMaterials; i++) { 225 Material mat = new Material(this); 226 mat.load(dis); 227 mMaterials.put(mat.getName(), mat); 228 } 229 230 int numGroups = dis.readInt(); 231 for (int i = 0; i < numGroups; i++) { 232 Group g = new Group(this); 233 g.load(dis); 234 mGroups.put(g.getName(), g); 235 } 236 } 237 238 public void draw(GL10 gl) { 239 Iterator<Group> iter = mGroups.values().iterator(); 240 while (iter.hasNext()) { 241 iter.next().draw(gl); 242 } 243 } 244 } 245 246
