osg for android学习之一：windows下编译(亲测通过)【转】

1. 首先需要一个OSG for android的环境

(1)NDK 现在Eclipse 对NDK已经相当友好了，已经不需要另外cygwin的参与，具体可以参考 

Android NDK开发篇(一)：新版NDK环境搭建(免Cygwin，超级快)

(2).OSG for android的编译，参考 osg for android学习之一：windows下编译(亲测通过)  建议编译OpenGL ES2版本.

 

2.然后加载OSG自带的Example：osgAndroidExampleGLES2 

(1)点击菜单键加载文件路径，输入/sdcard/osg/cow.osg(必须先往sdcard创建文件夹osg并把cow.osg放到该文件夹里边) 

(2)接着经典的牛出现了:)                                                                                                                                                

3.自带的example太多的代码，这样的代码无论对于NDK的初学者或OSG很不直观，所以本人重写了一个HelloWolrd for 

osg的例子。例子很简单，就是简单加载一个四边形并附上颜色。

(1)java代码

 

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package com.example.helloosg; import javax.microedition.khronos.egl.EGLConfig; import javax.microedition.khronos.opengles.GL10; import android.opengl.GLSurfaceView.Renderer; public class NDKRenderer implements Renderer{          NDKRenderer(){     }          @Override     public void onSurfaceCreated(GL10 gl, EGLConfig config) {         // TODO Auto-generated method stub         gl.glEnable(GL10.GL_DEPTH_TEST);     }     @Override     public void onSurfaceChanged(GL10 gl, int width, int height) {         // TODO Auto-generated method stub         osgNativeLib.init(width, height);     }     @Override     public void onDrawFrame(GL10 gl) {         // TODO Auto-generated method stub         osgNativeLib.step();     } }

 

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package com.example.helloosg; public class osgNativeLib {          static {         System.loadLibrary("osgNativeLib");     }    /**     * @param width the current view width     * @param height the current view height     */     public static native void       init(int width, int height);     public static native void       step(); }

 

 C++ Code 

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package com.example.helloosg; import android.app.Activity; import android.opengl.GLSurfaceView; import android.os.Bundle; import android.view.Menu; import android.view.MenuItem; import android.widget.TextView; public class MainActivity extends Activity {     private GLSurfaceView mGLSurfaceView;          @Override     protected void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         mGLSurfaceView = new GLSurfaceView(this);         mGLSurfaceView.setEGLContextClientVersion(2);         NDKRenderer renderer = new NDKRenderer();         this.mGLSurfaceView.setRenderer(renderer);         this.setContentView(mGLSurfaceView);     }     @Override     public boolean onCreateOptionsMenu(Menu menu) {         // Inflate the menu; this adds items to the action bar if it is present.         getMenuInflater().inflate(R.menu.main, menu);         return true;     }     @Override     protected void onResume() {         // TODO Auto-generated method stub         super.onResume();         mGLSurfaceView.onResume();     }     @Override     protected void onPause() {         // TODO Auto-generated method stub         super.onPause();         mGLSurfaceView.onPause();     }     @Override     public boolean onOptionsItemSelected(MenuItem item) {         // Handle action bar item clicks here. The action bar will         // automatically handle clicks on the Home/Up button, so long         // as you specify a parent activity in AndroidManifest.xml.         int id = item.getItemId();         if (id == R.id.action_settings) {             return true;         }         return super.onOptionsItemSelected(item);     } }

 

（2）JNI代码

 

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/ *  Created on: 2014-10-19  *      Author: VCC  */ #include "OsgMainApp.h" OsgMainApp::OsgMainApp() { } void OsgMainApp::initOsgWindow(int x, int y, int width, int height) {     __android_log_write(ANDROID_LOG_ERROR, "OSGANDROID", "Init geometry");     _viewer = new osgViewer::Viewer();     _viewer->setUpViewerAsEmbeddedInWindow(x, y, width, height);     _viewer->setThreadingModel(osgViewer::ViewerBase::SingleThreaded);     _root = new osg::Group();     _viewer->realize();     _viewer->addEventHandler(new osgViewer::StatsHandler);     _viewer->addEventHandler(             new osgGA::StateSetManipulator(                     _viewer->getCamera()->getOrCreateStateSet()));     _viewer->addEventHandler(new osgViewer::ThreadingHandler);     _viewer->addEventHandler(new osgViewer::LODScaleHandler);     _manipulator = new osgGA::KeySwitchMatrixManipulator;     _manipulator->addMatrixManipulator('1', "Trackball",             new osgGA::TrackballManipulator());     _viewer->setCameraManipulator(_manipulator.get());     _viewer->getViewerStats()->collectStats("scene", true);     loadModels(); } void OsgMainApp::draw() {     _viewer->frame(); } void OsgMainApp::loadModels() {     osg::ref_ptr<osg::Node> loadedModel = osgDB::readNodeFile(             "/sdcard/osg/cow.osg");     loadedModel->setName("cow");     if (loadedModel != NULL) {         __android_log_print(ANDROID_LOG_ERROR, "OSGANDROID", "Not NULL");     }     osg::Shader * vshader = new osg::Shader(osg::Shader::VERTEX, gVertexShader);     osg::Shader * fshader = new osg::Shader(osg::Shader::FRAGMENT,             gFragmentShader);     osg::Program * prog = new osg::Program;     prog->addShader(vshader);     prog->addShader(fshader);     osg::ref_ptr<osg::Node> node = createNode();     //loadedModel->getOrCreateStateSet()->setAttribute(prog);     node->getOrCreateStateSet()->setAttribute(prog);     //_root->addChild(loadedModel);     _root->addChild(node);     osgViewer::Viewer::Windows windows;     _viewer->getWindows(windows);     for (osgViewer::Viewer::Windows::iterator itr = windows.begin();             itr != windows.end(); ++itr) {         (*itr)->getState()->setUseModelViewAndProjectionUniforms(true);         (*itr)->getState()->setUseVertexAttributeAliasing(true);     }     _viewer->setSceneData(NULL);     _viewer->setSceneData(_root.get());     _manipulator->getNode();     _viewer->home();     _viewer->getDatabasePager()->clear();     _viewer->getDatabasePager()->registerPagedLODs(_root.get());     _viewer->getDatabasePager()->setUpThreads(3, 1);     _viewer->getDatabasePager()->setTargetMaximumNumberOfPageLOD(2);     _viewer->getDatabasePager()->setUnrefImageDataAfterApplyPolicy(true, true); } //创建一个四边形节点 osg::ref_ptr<osg::Node> OsgMainApp::createNode() {     //创建一个叶节点对象     osg::ref_ptr<osg::Geode> geode = new osg::Geode();     //创建一个几何体对象     osg::ref_ptr<osg::Geometry> geom = new osg::Geometry();     //添加顶点数据 注意顶点的添加顺序是逆时针     osg::ref_ptr<osg::Vec3Array> v = new osg::Vec3Array();     //添加数据     v->push_back(osg::Vec3(0, 0, 0));     v->push_back(osg::Vec3(1, 0, 0));     v->push_back(osg::Vec3(1, 0, 1));     v->push_back(osg::Vec3(0, 0, 1));     //设置顶点数据     geom->setVertexArray(v.get());     //创建纹理订点数据     osg::ref_ptr<osg::Vec2Array> vt = new osg::Vec2Array();     //添加纹理坐标     vt->push_back(osg::Vec2(0, 0));     vt->push_back(osg::Vec2(1, 0));     vt->push_back(osg::Vec2(1, 1));     vt->push_back(osg::Vec2(0, 1));     //设置纹理坐标     geom->setTexCoordArray(0, vt.get());     //创建颜色数组     osg::ref_ptr<osg::Vec4Array> vc = new osg::Vec4Array();     //添加数据     vc->push_back(osg::Vec4(1, 0, 0, 1));     vc->push_back(osg::Vec4(0, 1, 0, 1));     vc->push_back(osg::Vec4(0, 0, 1, 1));     vc->push_back(osg::Vec4(1, 1, 0, 1));     //设置颜色数组     geom->setColorArray(vc.get());     //设置颜色的绑定方式为单个顶点     geom->setColorBinding(osg::Geometry::BIND_PER_VERTEX);     //创建法线数组     osg::ref_ptr<osg::Vec3Array> nc = new osg::Vec3Array();     //添加法线     nc->push_back(osg::Vec3(0, -1, 0));     //设置法线     geom->setNormalArray(nc.get());     //设置法绑定为全部顶点     geom->setNormalBinding(osg::Geometry::BIND_OVERALL);     //添加图元     geom->addPrimitiveSet(new osg::DrawArrays(osg::PrimitiveSet::QUADS, 0, 4));     //添加到叶子节点     geode->addDrawable(geom.get());     return geode.get(); }

 

 

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/*  * OsgMainApp.h  *  *  Created on: 2014-10-19  *      Author: VCC  */ #ifndef OSGMAINAPP_H_ #define OSGMAINAPP_H_ //android log #include <android/log.h> #include <iostream> #include <cstdlib> #include <math.h> #include <string> //osg #include <osg/GL> #include <osg/GLExtensions> #include <osg/Depth> #include <osg/Program> #include <osg/Shader> #include <osg/Node> #include <osg/Notify> #include <osg/ShapeDrawable> #include <osgText/Text> //osgDB #include <osgDB/DatabasePager> #include <osgDB/Registry> #include <osgDB/ReadFile> #include <osgDB/WriteFile> //osg_viewer #include <osgViewer/Viewer> #include <osgViewer/Renderer> #include <osgViewer/ViewerEventHandlers> //osgGA #include <osgGA/GUIEventAdapter> #include <osgGA/MultiTouchTrackballManipulator> #include <osgGA/TrackballManipulator> #include <osgGA/FlightManipulator> #include <osgGA/DriveManipulator> #include <osgGA/KeySwitchMatrixManipulator> #include <osgGA/StateSetManipulator> #include <osgGA/AnimationPathManipulator> #include <osgGA/TerrainManipulator> #include <osgGA/SphericalManipulator> //Static plugins Macro USE_OSGPLUGIN(ive) USE_OSGPLUGIN(osg) USE_OSGPLUGIN(osg2) USE_OSGPLUGIN(terrain) USE_OSGPLUGIN(rgb) USE_OSGPLUGIN(OpenFlight) USE_OSGPLUGIN(dds) //Static DOTOSG USE_DOTOSGWRAPPER_LIBRARY(osg) USE_DOTOSGWRAPPER_LIBRARY(osgFX) USE_DOTOSGWRAPPER_LIBRARY(osgParticle) USE_DOTOSGWRAPPER_LIBRARY(osgTerrain) USE_DOTOSGWRAPPER_LIBRARY(osgText) USE_DOTOSGWRAPPER_LIBRARY(osgViewer) USE_DOTOSGWRAPPER_LIBRARY(osgVolume) //Static serializer USE_SERIALIZER_WRAPPER_LIBRARY(osg) USE_SERIALIZER_WRAPPER_LIBRARY(osgAnimation) USE_SERIALIZER_WRAPPER_LIBRARY(osgFX) USE_SERIALIZER_WRAPPER_LIBRARY(osgManipulator) USE_SERIALIZER_WRAPPER_LIBRARY(osgParticle) USE_SERIALIZER_WRAPPER_LIBRARY(osgTerrain) USE_SERIALIZER_WRAPPER_LIBRARY(osgText) USE_SERIALIZER_WRAPPER_LIBRARY(osgVolume) #define LOG_TAG "osgNativeLib" #define LOGI(...) __android_log_print(ANDROID_LOG_INFO, LOG_TAG, __VA_ARGS__) #define LOGE(...) __android_log_print(ANDROID_LOG_ERROR, LOG_TAG, __VA_ARGS__) static const char gVertexShader[] =     "void main() {                                                          \n"     "    gl_Position  = gl_ModelViewProjectionMatrix * gl_Vertex;          \n"     "}                                                                      \n"; static const char gFragmentShader[] =     "void main() {                             \n"     "  gl_FragColor =vec4(0.4,0.4,0.8,1.0);    \n"     "}                                                                      \n"; class OsgMainApp { private:     osg::ref_ptr<osgViewer::Viewer>                 _viewer;     osg::ref_ptr<osg::Group>                        _root;     osg::ref_ptr<osgGA::KeySwitchMatrixManipulator> _manipulator; public:     OsgMainApp();     void initOsgWindow(int x,int y,int width,int height);     void draw(); private:     osg::ref_ptr<osg::Node> createNode();     void loadModels(); }; #endif /* OSGMAINAPP_H_ */

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#include <jni.h> #include <string.h> #include <osg/Node> #include <iostream> #include "OsgMainApp.h" OsgMainApp mainApp; extern "C"{     JNIEXPORT void JNICALL Java_com_example_helloosg_osgNativeLib_init(JNIEnv* env, jobject obj, jint width, jint height);     JNIEXPORT void JNICALL Java_com_example_helloosg_osgNativeLib_step(JNIEnv* env, jobject obj); } JNIEXPORT void JNICALL Java_com_example_helloosg_osgNativeLib_init(JNIEnv* env, jobject obj, jint width, jint height) {     mainApp.initOsgWindow(0, 0, width, height); } JNIEXPORT void JNICALL Java_com_example_helloosg_osgNativeLib_step(JNIEnv* env, jobject obj){     mainApp.draw(); }

(3).mk文件

android.mk

 

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LOCAL_PATH := $(call my-dir) include $(CLEAR_VARS) LOCAL_MODULE    := osgNativeLib ### Main Install dir OSG_ANDROID_DIR := C:/Develop/osggles2 LIBDIR          := $(OSG_ANDROID_DIR)/obj/local/armeabi ifeq ($(TARGET_ARCH_ABI),armeabi-v7a)     LOCAL_ARM_NEON  := true     LIBDIR          := $(OSG_ANDROID_DIR)/obj/local/armeabi-v7a endif ### Add all source file names to be included in lib separated by a whitespace LOCAL_C_INCLUDES:= $(OSG_ANDROID_DIR)/include LOCAL_CFLAGS    := -fno-short-enums LOCAL_CPPFLAGS  := -DOSG_LIBRARY_STATIC  LOCAL_LDLIBS := -lGLESv2 -lz -llog LOCAL_SRC_FILES := osgNativeLib.cpp OsgMainApp.cpp LOCAL_LDFLAGS   := -L $(LIBDIR) \ -losgdb_dds \ -losgdb_openflight \ -losgdb_tga \ -losgdb_rgb \ -losgdb_osgterrain \ -losgdb_osg \ -losgdb_ive \ -losgdb_deprecated_osgviewer \ -losgdb_deprecated_osgvolume \ -losgdb_deprecated_osgtext \ -losgdb_deprecated_osgterrain \ -losgdb_deprecated_osgsim \ -losgdb_deprecated_osgshadow \ -losgdb_deprecated_osgparticle \ -losgdb_deprecated_osgfx \ -losgdb_deprecated_osganimation \ -losgdb_deprecated_osg \ -losgdb_serializers_osgvolume \ -losgdb_serializers_osgtext \ -losgdb_serializers_osgterrain \ -losgdb_serializers_osgsim \ -losgdb_serializers_osgshadow \ -losgdb_serializers_osgparticle \ -losgdb_serializers_osgmanipulator \ -losgdb_serializers_osgfx \ -losgdb_serializers_osganimation \ -losgdb_serializers_osg \ -losgViewer \ -losgVolume \ -losgTerrain \ -losgText \ -losgShadow \ -losgSim \ -losgParticle \ -losgManipulator \ -losgGA \ -losgFX \ -losgDB \ -losgAnimation \ -losgUtil \ -losg \ -lOpenThreads \ -lgnustl_static include $(BUILD_SHARED_LIBRARY)

 

application.mk

 

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#ANDROID APPLICATION MAKEFILE APP_BUILD_SCRIPT := $(call my-dir)/Android.mk #APP_PROJECT_PATH := $(call my-dir) APP_OPTIM := release APP_PLATFORM    := android-8 APP_STL         := gnustl_static APP_CPPFLAGS    := -fexceptions -frtti APP_ABI         := armeabi armeabi-v7a APP_MODULES     := osgNativeLib

运行结果

 

         注：由于代码是基于OpenGL ES2，简单加载了一个四边形，并在片元着色器将四边形的颜色赋为浅蓝色，其实也可以通过

OSG将四边形的颜色或者纹理赋到四边形上，具体下篇将说明

https://blog.csdn.net/hai7song/article/details/40515465

参考：

https://blog.csdn.net/edgarliaohs/article/details/37877287

http://www.openscenegraph.com/index.php/documentation/platform-specifics/android/43-building-openscenegraph-for-android-3-0-2