Initial Contribution
This commit is contained in:
The Android Open Source Project
334
apps/OBJViewer/com/android/objviewer/OBJViewer.java
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334
apps/OBJViewer/com/android/objviewer/OBJViewer.java
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/*
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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.objviewer;
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import android.app.Activity;
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import android.content.AssetManager;
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import android.content.Context;
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import android.graphics.Canvas;
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import android.graphics.OpenGLContext;
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import android.graphics.Paint;
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import android.graphics.glutils.GLView;
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import android.graphics.glutils.Object3D;
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import android.os.Bundle;
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import android.os.Handler;
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import android.os.Message;
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import android.os.SystemClock;
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import android.view.KeyEvent;
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import android.view.View;
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import android.view.Window;
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import java.io.IOException;
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import java.io.InputStream;
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import java.util.ArrayList;
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import java.util.List;
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import javax.microedition.khronos.opengles.GL10;
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class OBJView extends View {
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// Mathematical constants
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private static final float PI = (float)Math.PI;
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private static final float TWO_PI = (float)(2.0*Math.PI);
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private static final float PI_OVER_TWO = (float)(Math.PI/2.0);
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// Ambient light to apply
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// private float[] lightModelAmbient = { 0.0f, 0.0f, 0.0f, 1.0f };
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private float[] lightModelAmbient = { 0.2f, 0.2f, 0.2f, 1.0f };
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// Paint object for drawing the FPS display
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private Paint paint = new Paint();
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// GLView object to manage drawing
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private GLView glView = new GLView();
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private boolean initialized = false;
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private OpenGLContext mGLContext;
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// Next time to draw
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private long mNextTime;
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// View transformation controlled by UI
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private float mRotAngle = 0.0f;
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private float mRotVelocity = 1.0f;
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private float mTiltAngle = 0.0f;
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// Object bounds
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private float mCenterX = 0.0f;
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private float mCenterY = 0.0f;
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private float mCenterZ = 0.0f;
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private float mScale = 1.0f;
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// Light direction
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private float[] mLightDir = { 0.0f, 0.0f, 1.0f, 0.0f };
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public OBJView(Context context) {
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super(context);
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mGLContext = new OpenGLContext(OpenGLContext.DEPTH_BUFFER);
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Message msg = mHandler.obtainMessage(INVALIDATE);
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mNextTime = SystemClock.uptimeMillis() + 100;
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mHandler.sendMessageAtTime(msg, mNextTime);
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requestFocus();
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}
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public void reset() {
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initialized = false;
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mRotAngle = 0.0f;
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mRotVelocity = 1.0f;
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mTiltAngle = 0.0f;
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mCenterX = 0.0f;
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mCenterY = 0.0f;
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mCenterZ = 0.0f;
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mScale = 1.0f;
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}
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public boolean onKeyDown(int keyCode, KeyEvent event) {
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// Hand the key to the GLView object first
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if (glView.processKey(keyCode)) {
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return true;
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}
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switch (keyCode) {
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case KeyEvent.KEYCODE_DPAD_LEFT:
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mRotVelocity -= 1.0f;
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break;
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case KeyEvent.KEYCODE_DPAD_RIGHT:
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mRotVelocity += 1.0f;
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break;
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case KeyEvent.KEYCODE_DPAD_CENTER:
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mRotVelocity = 0.0f;
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break;
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case KeyEvent.KEYCODE_DPAD_UP:
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mTiltAngle -= 360.0f/24.0f;
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break;
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case KeyEvent.KEYCODE_DPAD_DOWN:
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mTiltAngle += 360.0f/24.0f;
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break;
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case KeyEvent.KEYCODE_U:
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OBJViewer.nextObject();
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reset();
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break;
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default:
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return super.onKeyDown(keyCode, event);
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}
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return true;
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}
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private void init(GL10 gl) {
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glView.reset();
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paint.setColor(0xffffffff);
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gl.glEnable(gl.GL_DEPTH_TEST);
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gl.glDisable(gl.GL_SCISSOR_TEST);
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// Some quality settings...
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gl.glEnable(gl.GL_DITHER);
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gl.glShadeModel(gl.GL_SMOOTH);
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gl.glEnable(gl.GL_CULL_FACE);
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gl.glFrontFace(gl.GL_CCW);
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gl.glClearColor(0, 0, 0, 1);
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gl.glLightModelf(gl.GL_LIGHT_MODEL_TWO_SIDE, 0);
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gl.glLightModelfv(gl.GL_LIGHT_MODEL_AMBIENT, lightModelAmbient, 0);
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}
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@Override
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protected void onDraw(Canvas canvas) {
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GL10 gl = (GL10)mGLContext.getGL();
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mGLContext.makeCurrent(this);
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if (!initialized) {
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init(gl);
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initialized = true;
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// Load the object
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Object3D obj = OBJViewer.getObject();
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// Compute a scale factor and translation to bring it
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// into view
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mCenterX = (obj.getBoundsMinX() + obj.getBoundsMaxX())/2.0f;
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mCenterY = (obj.getBoundsMinY() + obj.getBoundsMaxY())/2.0f;
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mCenterZ = (obj.getBoundsMinZ() + obj.getBoundsMaxZ())/2.0f;
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float spanX = obj.getBoundsMaxX() - obj.getBoundsMinX();
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float spanY = obj.getBoundsMaxY() - obj.getBoundsMinY();
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float spanZ = obj.getBoundsMaxZ() - obj.getBoundsMinZ();
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float maxSpan = Math.max(spanX, spanY);
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maxSpan = Math.max(maxSpan, spanZ);
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mScale = 2.0f/maxSpan;
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}
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int w = getWidth();
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int h = getHeight();
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gl.glViewport(0, 0, w, h);
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float ratio = (float)w/h;
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glView.setAspectRatio(ratio);
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// Clear buffers
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gl.glClear(gl.GL_COLOR_BUFFER_BIT | gl.GL_DEPTH_BUFFER_BIT);
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// Set up the projection and view
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glView.setProjection(gl);
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glView.setView(gl);
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// Set up lighting
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gl.glMatrixMode(gl.GL_MODELVIEW);
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gl.glEnable(gl.GL_LIGHTING);
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gl.glEnable(gl.GL_LIGHT0);
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gl.glLightfv(gl.GL_LIGHT0, gl.GL_POSITION, mLightDir, 0);
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glView.setLights(gl, gl.GL_LIGHT0);
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// Rotate the viewpoint around the model
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gl.glRotatef(mTiltAngle, 1, 0, 0);
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gl.glRotatef(mRotAngle, 0, 1, 0);
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// Scale object to fit in [-1, 1]
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gl.glScalef(mScale, mScale, mScale);
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// Center the object at the origin
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gl.glTranslatef(-mCenterX, -mCenterY, -mCenterZ);
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// Increment the rotation angle
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mRotAngle += mRotVelocity;
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if (mRotAngle < 0.0f) {
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mRotAngle += 360.0f;
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}
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if (mRotAngle > 360.0f) {
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mRotAngle -= 360.0f;
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}
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// Draw the object
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Object3D object = OBJViewer.getObject();
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object.draw(gl);
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// Allow GL to complete
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mGLContext.post();
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// Draw GLView messages and/or FPS
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glView.showMessages(canvas);
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glView.setNumTriangles(object.getNumTriangles());
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glView.showStatistics(canvas, w);
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}
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private static final int INVALIDATE = 1;
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private final Handler mHandler = new Handler() {
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public void handleMessage(Message msg) {
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if (msg.what == INVALIDATE) {
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invalidate();
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msg = obtainMessage(INVALIDATE);
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long current = SystemClock.uptimeMillis();
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if (mNextTime < current) {
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mNextTime = current + 20;
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}
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sendMessageAtTime(msg, mNextTime);
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mNextTime += 20;
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}
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}
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};
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}
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public class OBJViewer extends Activity {
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private static Object3D object = null;
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private static List<String> objectFiles = new ArrayList<String>();
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private static int objectIndex = 0;
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static {
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objectFiles.add("world.gles");
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objectFiles.add("al.gles");
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objectFiles.add("apple.gles");
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objectFiles.add("dolphins.gles");
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objectFiles.add("f16.gles");
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objectFiles.add("flowers.gles");
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objectFiles.add("porsche.gles");
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objectFiles.add("rosevase.gles");
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objectFiles.add("shuttle.gles");
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objectFiles.add("soccerball.gles");
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}
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private int readInt16(InputStream is) throws Exception {
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return is.read() | (is.read() << 8);
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}
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public static Object3D getObject() {
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return object;
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}
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public static void nextObject() {
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try {
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objectIndex = (objectIndex + 1) % objectFiles.size();
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object.load(objectFiles.get(objectIndex));
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} catch (IOException e) {
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throw new RuntimeException(e);
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}
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}
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@Override protected void onCreate(Bundle icicle) {
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super.onCreate(icicle);
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// Get rid of the title
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requestWindowFeature(Window.FEATURE_NO_TITLE);
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// Make sure we're not drawing a background
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setTheme(R.style.Theme);
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setContentView(new OBJView((Context)getApplication()));
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if (object == null) {
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try {
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final AssetManager am = getAssets();
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this.object = new Object3D() {
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public InputStream readFile(String filename)
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throws IOException {
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return am.open(filename);
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}
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};
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object.load(objectFiles.get(0));
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} catch (Exception e) {
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throw new RuntimeException(e);
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}
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}
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}
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@Override protected void onResume() {
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super.onResume();
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}
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@Override protected void onStop() {
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super.onStop();
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}
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}
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