min3d引擎使用指南(Android stdio)<一>
阿新 • • 發佈:2018-11-07
嘗試著把min3d引擎移植到android stdio上開發,開始的時候遇到不少問題,所以在CSDN上開個帖。同時感謝美麗同事XY的幫忙。
第一個問題:一開始把min3d包匯入Android stdio後,在MainActivity中提示“improt unused imports statement”,然後聲明瞭物件,也同樣沒用。
後來上谷歌查了不少資料,在另一篇CSDN部落格上找到了一項設定:
然後點 ok,這樣 Android stdio就懂得自動匯入響應的包。import就不會報錯了。
第二個問題:在Android stdio上新建的空工程,public class MainActivity extends AppCompatActivity。而min3d要顯示跑起來,需要繼承的是RendererActivity。所以修改的程式碼如下:
下面的xml檔案,就是美麗的同事幫我弄好的。package com.example.zk.min3d_demo; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.util.DisplayMetrics; import android.view.Window; import android.view.WindowManager; import android.widget.FrameLayout; import min3d.animation.AnimationObject3d; import min3d.core.Object3dContainer; import min3d.core.RendererActivity; import min3d.objectPrimitives.Box; import min3d.parser.IParser; import min3d.parser.Parser; import min3d.vos.Light; public class MainActivity extends RendererActivity { //public class MainActivity extends AppCompatActivity { Object3dContainer faceObject3D; //3D物件 private AnimationObject3d ogre; private RockerView rockerView1; float modelx = 0; float modely = 0; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); //frame3dView FrameLayout ll = (FrameLayout) this.findViewById(R.id.frame3dView); //在xml中,指定顯示的控制元件,這裡是一個FrameLayout。 ll.addView(_glSurfaceView);//加入到_glSurfaceView中顯示。 rockerView1 = (RockerView) findViewById(R.id.rockerView1); rockerView1.setRockerChangeListener(new RockerView.RockerChangeListener() { @Override public void report(float x, float y) { // TODO Auto-generated method stub modelx = x/1000; modely = y/1000; } }); } public void initScene() { scene.lights().add(new Light()); IParser parser = Parser.createParser(Parser.Type.MD2, getResources(), "com.example.zk.min3d_demo:raw/ogro", false); parser.parse(); ogre = parser.getParsedAnimationObject(); ogre.scale().x = ogre.scale().y = ogre.scale().z = .07f; ogre.rotation().z = -90; ogre.rotation().x = -90; scene.addChild(ogre); ogre.setFps(70); ogre.play(); } public void updateScene() { // faceObject3D.rotation().x++;//圍繞著X軸旋轉,正數為順時針,速度由X的數值變化決定 ogre.rotation().x +=modelx;//設定初始位置,平截頭體中xyz的座標位置 ogre.position().y +=modely; } }
<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" tools:context="com.example.zk.min3d_demo.MainActivity"> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Hello World!" android:id="@+id/textView" /> <FrameLayout android:layout_width="match_parent" android:layout_height="match_parent" android:layout_below="@+id/textView" android:id="@+id/frame3dView" android:layout_alignParentStart="true"> </FrameLayout> <RelativeLayout android:layout_width="match_parent" android:layout_height="match_parent" android:layout_gravity="center_horizontal|top"> <com.example.zk.min3d_demo.RockerView android:id="@+id/rockerView1" android:layout_width="120dp" android:layout_height="120dp" android:layout_marginLeft="20dp" android:layout_alignParentTop="true" android:layout_alignParentEnd="true" /> </RelativeLayout> </RelativeLayout>
裡面的搖桿控制元件,要用到下面這個Java類
package com.example.zk.min3d_demo;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.PointF;
import android.graphics.Rect;
import android.util.AttributeSet;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewTreeObserver;
/**
* Created by zk on 2016/11/24.
*/
public class RockerView extends View {
//固定搖桿背景圓形的X,Y座標以及半徑
private float mRockerBg_X;
private float mRockerBg_Y;
private float mRockerBg_R;
//搖桿的X,Y座標以及搖桿的半徑
private float mRockerBtn_X;
private float mRockerBtn_Y;
private float mRockerBtn_R;
private Bitmap mBmpRockerBg;
private Bitmap mBmpRockerBtn;
private PointF mCenterPoint;
public RockerView(Context context, AttributeSet attrs) {
super(context, attrs);
// TODO Auto-generated constructor stub
// 獲取bitmap
mBmpRockerBg = BitmapFactory.decodeResource(context.getResources(), R.drawable.rocker_bg);
mBmpRockerBtn = BitmapFactory.decodeResource(context.getResources(), R.drawable.rocker_btn);
getViewTreeObserver().addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() {
// 呼叫該方法時可以獲取view實際的寬getWidth()和高getHeight()
@Override
public boolean onPreDraw() {
// TODO Auto-generated method stub
getViewTreeObserver().removeOnPreDrawListener(this);
Log.e("RockerView", getWidth() + "/" + getHeight());
mCenterPoint = new PointF(getWidth() / 2, getHeight() / 2);
mRockerBg_X = mCenterPoint.x;
mRockerBg_Y = mCenterPoint.y;
mRockerBtn_X = mCenterPoint.x;
mRockerBtn_Y = mCenterPoint.y;
float tmp_f = mBmpRockerBg.getWidth() / (float)(mBmpRockerBg.getWidth() + mBmpRockerBtn.getWidth());
mRockerBg_R = tmp_f * getWidth() / 2;
mRockerBtn_R = (1.0f - tmp_f)* getWidth() / 2;
return true;
}
});
new Thread(new Runnable() {
@Override
public void run() {
// TODO Auto-generated method stub
while(true){
//系統呼叫onDraw方法重新整理畫面
RockerView.this.postInvalidate();
try {
Thread.sleep(100);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}).start();
}
@Override
protected void onDraw(Canvas canvas) {
// TODO Auto-generated method stub
super.onDraw(canvas);
canvas.drawBitmap(mBmpRockerBg, null,
new Rect((int)(mRockerBg_X - mRockerBg_R),
(int)(mRockerBg_Y - mRockerBg_R),
(int)(mRockerBg_X + mRockerBg_R),
(int)(mRockerBg_Y + mRockerBg_R)),
null);
canvas.drawBitmap(mBmpRockerBtn, null,
new Rect((int)(mRockerBtn_X - mRockerBtn_R),
(int)(mRockerBtn_Y - mRockerBtn_R),
(int)(mRockerBtn_X + mRockerBtn_R),
(int)(mRockerBtn_Y + mRockerBtn_R)),
null);
}
@Override
public boolean onTouchEvent(MotionEvent event) {
// TODO Auto-generated method stub
if (event.getAction() == MotionEvent.ACTION_DOWN || event.getAction() == MotionEvent.ACTION_MOVE) {
// 當觸屏區域不在活動範圍內
if (Math.sqrt(Math.pow((mRockerBg_X - (int) event.getX()), 2) + Math.pow((mRockerBg_Y - (int) event.getY()), 2)) >= mRockerBg_R) {
//得到搖桿與觸屏點所形成的角度
double tempRad = getRad(mRockerBg_X, mRockerBg_Y, event.getX(), event.getY());
//保證內部小圓運動的長度限制
getXY(mRockerBg_X, mRockerBg_Y, mRockerBg_R, tempRad);
} else {//如果小球中心點小於活動區域則隨著使用者觸屏點移動即可
mRockerBtn_X = (int) event.getX();
mRockerBtn_Y = (int) event.getY();
}
if(mRockerChangeListener != null) {
mRockerChangeListener.report(mRockerBtn_X - mCenterPoint.x, mRockerBtn_Y - mCenterPoint.y);
}
} else if (event.getAction() == MotionEvent.ACTION_UP) {
//當釋放按鍵時搖桿要恢復搖桿的位置為初始位置
mRockerBtn_X = mCenterPoint.x;
mRockerBtn_Y = mCenterPoint.y;
if(mRockerChangeListener != null) {
mRockerChangeListener.report(0, 0);
}
}
return true;
}
/***
* 得到兩點之間的弧度
*/
public double getRad(float px1, float py1, float px2, float py2) {
//得到兩點X的距離
float x = px2 - px1;
//得到兩點Y的距離
float y = py1 - py2;
//算出斜邊長
float xie = (float) Math.sqrt(Math.pow(x, 2) + Math.pow(y, 2));
//得到這個角度的餘弦值(通過三角函式中的定理 :鄰邊/斜邊=角度餘弦值)
float cosAngle = x / xie;
//通過反餘弦定理獲取到其角度的弧度
float rad = (float) Math.acos(cosAngle);
//注意:當觸屏的位置Y座標<搖桿的Y座標我們要取反值-0~-180
if (py2 < py1) {
rad = -rad;
}
return rad;
}
/**
*
* @param R 圓周運動的旋轉點
* @param centerX 旋轉點X
* @param centerY 旋轉點Y
* @param rad 旋轉的弧度
*/
public void getXY(float centerX, float centerY, float R, double rad) {
//獲取圓周運動的X座標
mRockerBtn_X = (float) (R * Math.cos(rad)) + centerX;
//獲取圓周運動的Y座標
mRockerBtn_Y = (float) (R * Math.sin(rad)) + centerY;
}
RockerChangeListener mRockerChangeListener = null;
public void setRockerChangeListener(RockerChangeListener rockerChangeListener) {
mRockerChangeListener = rockerChangeListener;
}
public interface RockerChangeListener {
public void report(float x, float y);
}
}
還有一些資原始檔,我已經把整個工程上傳到CSDN,無積分。但還在稽核,通過後會把連結貼到這裡:
http://download.csdn.net/detail/zhangkun35268/9692440
效果動態圖: