jpct-ae库解析obj实例

package com.threed.jpct.example; import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.lang.reflect.Field; import javax.microedition.khronos.egl.EGL10; import javax.microedition.khronos.egl.EGLConfig; import javax.microedition.khronos.egl.EGLDisplay; import javax.microedition.khronos.opengles.GL10; import android.app.Activity; import android.app.Dialog; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.opengl.GLSurfaceView; import android.os.Bundle; import android.os.Handler; import android.os.Message; import android.util.FloatMath; import android.util.Log; import android.view.MotionEvent; import android.view.View; import android.widget.Button; import android.widget.LinearLayout; import android.widget.ProgressBar; import android.widget.TextView; import com.threed.jpct.Camera; import com.threed.jpct.FrameBuffer; import com.threed.jpct.Light; import com.threed.jpct.Loader; import com.threed.jpct.Logger; import com.threed.jpct.Object3D; import com.threed.jpct.RGBColor; import com.threed.jpct.SimpleVector; import com.threed.jpct.Texture; import com.threed.jpct.TextureManager; import com.threed.jpct.World; import com.threed.jpct.util.BitmapHelper; import com.threed.jpct.util.MemoryHelper; /** * A simple demo. This shows more how to use jPCT-AE than it shows how to write * a proper application for Android. It includes basic activity management to * handle pause and resume... * * @author EgonOlsen * */ public class HelloWorld extends Activity { // Used to handle pause and resume... private static HelloWorld master = null; private GLSurfaceView mGLView; private MyRenderer renderer = null; private FrameBuffer fb = null; private World world = null; private RGBColor back = new RGBColor(50, 50, 100); private float touchTurn = 0; private float touchTurnUp = 0; private float touchScale = 1; private float xpos = -1; private float ypos = -1; //缩放 float preDist; boolean zoom = false;; private Object3D model = null; private int fps = 0; private Light sun = null; private Dialog dialog; private int progressValue = 0; private ProgressBar progress; private TextView progressPercent; private String path = "/sdcard/moxingzhenghe/dragon"; protected void onCreate(Bundle savedInstanceState) { Logger.log("onCreate"); if (master != null) { copy(master); } super.onCreate(savedInstanceState); mGLView = new GLSurfaceView(getApplication()); mGLView.setEGLConfigChooser(new GLSurfaceView.EGLConfigChooser() { public EGLConfig chooseConfig(EGL10 egl, EGLDisplay display) { // Ensure that we get a 16bit framebuffer. Otherwise, we'll fall // back to Pixelflinger on some device (read: Samsung I7500) int[] attributes = new int[] { EGL10.EGL_DEPTH_SIZE, 16, EGL10.EGL_NONE }; EGLConfig[] configs = new EGLConfig[1]; int[] result = new int[1]; egl.eglChooseConfig(display, attributes, configs, 1, result); return configs[0]; } }); renderer = new MyRenderer(); mGLView.setRenderer(renderer); setContentView(mGLView); } @Override protected void onPause() { super.onPause(); mGLView.onPause(); } @Override protected void onResume() { super.onResume(); mGLView.onResume(); } @Override protected void onStop() { super.onStop(); } private void copy(Object src) { try { Logger.log("Copying data from master Activity!"); Field[] fs = src.getClass().getDeclaredFields(); for (Field f : fs) { f.setAccessible(true); f.set(this, f.get(src)); } } catch (Exception e) { throw new RuntimeException(e); } } public boolean onTouchEvent(MotionEvent me) { // mScaleGestureDetector.onTouchEvent(me); int action = me.getAction() & MotionEvent.ACTION_MASK; switch(action){ case MotionEvent.ACTION_DOWN: xpos = me.getX(); ypos = me.getY(); break; case MotionEvent.ACTION_UP: xpos = -1; ypos = -1; touchTurn = 0; touchTurnUp = 0; break; case MotionEvent.ACTION_MOVE: if(me.getPointerCount() == 1){ float xd = me.getX() - xpos; float yd = me.getY() - ypos; xpos = me.getX(); ypos = me.getY(); touchTurn = xd / -100f; touchTurnUp = yd / -100f; } else if (me.getPointerCount() == 2 && zoom ){ float dist = spacing(me); touchScale = 1 - (preDist - dist)/100f; preDist = dist; } break; case MotionEvent.ACTION_POINTER_DOWN: preDist = spacing(me); if (spacing(me) > 10f){ zoom = true; } break; case MotionEvent.ACTION_POINTER_UP: zoom = false; touchTurn = 0; touchTurnUp = 0; break; } try { Thread.sleep(15); } catch (Exception e) { // No need for this... } return super.onTouchEvent(me); } private float spacing(MotionEvent event) { float x = event.getX(0) - event.getX(1); float y = event.getY(0) - event.getY(1); return FloatMath.sqrt(x * x + y * y); } protected boolean isFullscreenOpaque() { return true; } class MyRenderer implements GLSurfaceView.Renderer { private long time = System.currentTimeMillis(); public MyRenderer() { } public void onSurfaceChanged(GL10 gl, int w, int h) { if (fb != null) { fb.dispose(); } fb = new FrameBuffer(gl, w, h); if (master == null) { world = new World(); world.setAmbientLight(20, 20, 20); sun = new Light(world); sun.setIntensity(250, 250, 250); Object3D[] objs = null; try { File files = new File(path); if(files == null || files.listFiles() == null || files.listFiles().length == 0){ return; } FileInputStream objstream = null; FileInputStream mtlstream = null; for(File file : files.listFiles()){ if(file.getName().toLowerCase().endsWith(".obj")){ objstream = new FileInputStream(file); } else if(file.getName().toLowerCase().endsWith(".mtl")){ mtlstream = new FileInputStream(file); } else if(isImage(file)){ Bitmap bitmap = BitmapFactory.decodeFile(file.getAbsolutePath()); int scaleWidth = -1; int scaleHeight = -1; if(!isPowerOf2(bitmap.getHeight()) || !isPowerOf2(bitmap.getWidth())){ scaleWidth = nextPowerOf2(bitmap.getWidth()); scaleHeight = nextPowerOf2(bitmap.getHeight()); } bitmap = BitmapHelper.rescale(bitmap, scaleWidth, scaleHeight); Texture texture = new Texture(bitmap); TextureManager.getInstance().addTexture(file.getName(), texture); } } objs = Loader.loadOBJ(objstream, mtlstream, 2); } catch (FileNotFoundException e) { e.printStackTrace(); return; } model = Object3D.mergeAll(objs); model.strip(); model.build(); world.addObject(model); Camera cam = world.getCamera(); cam.moveCamera(Camera.CAMERA_MOVEOUT, 50); cam.lookAt(model.getTransformedCenter()); SimpleVector sv = new SimpleVector(); sv.set(model.getTransformedCenter()); sv.y -= 100; sv.z -= 100; sun.setPosition(sv); MemoryHelper.compact(); if (master == null) { Logger.log("Saving master Activity!"); master = HelloWorld.this; } } } public void onSurfaceCreated(GL10 gl, EGLConfig config) { } public void onDrawFrame(GL10 gl) { if (touchTurn != 0 && !zoom ) { model.rotateY(touchTurn); touchTurn = 0; } if (touchTurnUp != 0 && !zoom) { model.rotateX(touchTurnUp); touchTurnUp = 0; } if(touchScale != 1 && touchScale > 0){ model.scale(touchScale); touchScale = 1; } fb.clear(back); world.renderScene(fb); world.draw(fb); fb.display(); if (System.currentTimeMillis() - time >= 1000) { Logger.log(fps + "fps"); fps = 0; time = System.currentTimeMillis(); } fps++; } public boolean isImage(File file){ if(file.getName().toLowerCase().endsWith(".bmp") || file.getName().toLowerCase().endsWith(".jpg") || file.getName().toLowerCase().endsWith(".png")){