Android Open Source - NotATop Draw Background

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Back to project page NotATop.
License

The source code is released under:
GNU General Public License
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Java Source Code

package com.gg.module;
/*from  www .  jav a 2  s  . c  om*/
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.FloatBuffer;
import javax.microedition.khronos.opengles.GL10;

import com.gg.util.Constant;

public class DrawBackground
{  
    private FloatBuffer   mVertexBuffer;//???????????????
      
      private FloatBuffer mTextureBuffer;//???????????????
  
      private int vCount;//?????????????????????
      
      int drawableId;//????ID 
      
      public float mAngleX;//??X?????????
      public float mAngleY;//??Y?????????
      public float mAngleZ;//??Z?????????    
      
      public DrawBackground(int drawableId)
      {
        this.drawableId=drawableId;
        
        //???????????????
        initVertex();
  
        //???????????????
        initTexture();
      }
      
     
      public void initVertex()
    {
      float x=Constant.LOGIC_WIDTH/2;//??????X??????????
      
      float y=1f*2/2;//??????Y??????????
      
      float z=0;//??????Z??????????

      float[] vertices=
      {//??????????????????????????????????????
        -x,y,z,
        -x,-y,z,
        x,y,z,
        
        -x,-y,z,
        x,-y,z,
        x,y,z,
    
      };
      
      vCount=vertices.length/3;//????????
      //???????????????????
      //vertices.length*4????????Float??????
      ByteBuffer vbb=ByteBuffer.allocateDirect(vertices.length*4);  
      vbb.order(ByteOrder.nativeOrder());//??????????
      mVertexBuffer=vbb.asFloatBuffer();//????float?????
      mVertexBuffer.put(vertices);//????????????????????
      mVertexBuffer.position(0);//??????????????      
      
    }
     
  
      public void initTexture()
    {//??????????
      float[] textures=new float[vCount*2];//?????????????????????2??
      
      int temp=0;
      
      //????????????????????
      textures[temp++]=0;
      textures[temp++]=0;
      
      textures[temp++]=0;
      textures[temp++]=1;
      
      textures[temp++]=1;
      textures[temp++]=0;
      
      
      //???????????????????
      textures[temp++]=0;
      textures[temp++]=1;
      
      textures[temp++]=1;
      textures[temp++]=1;
      
      textures[temp++]=1;
      textures[temp++]=0;
    
      //???????????????????
      //vertices.length*4????????Float??????
      ByteBuffer tbb=ByteBuffer.allocateDirect(textures.length*4);  
      tbb.order(ByteOrder.nativeOrder());//??????????
      mTextureBuffer=tbb.asFloatBuffer();//????float?????
      mTextureBuffer.put(textures);//????????????????????
      mTextureBuffer.position(0);//??????????????  
    }
    
      
    public void drawSelf(GL10 gl)
    {
      gl.glEnableClientState(GL10.GL_VERTEX_ARRAY);//??????????
      gl.glVertexPointer(3, GL10.GL_FLOAT, 0, mVertexBuffer);//????????????????????
  
      gl.glEnable(GL10.GL_TEXTURE_2D);//????????
      gl.glEnableClientState(GL10.GL_TEXTURE_COORD_ARRAY);//????????????
      gl.glTexCoordPointer(2, GL10.GL_FLOAT, 0, mTextureBuffer);//??????????????????
      gl.glBindTexture(GL10.GL_TEXTURE_2D, drawableId);//????
    
      gl.glRotatef(mAngleX, 1, 0, 0);//??X?????mAngleX??
       gl.glRotatef(mAngleY, 0, 1, 0);//??Y?????mAngleY??
       gl.glRotatef(mAngleZ, 0, 0, 1);//??Z?????mAngleZ??
      
      gl.glDrawArrays(GL10.GL_TRIANGLES, 0, vCount);//???????
      
      gl.glDisableClientState(GL10.GL_VERTEX_ARRAY);
    }


    public int getDrawableId() {
      return drawableId;
    }


    public void setDrawableId(int drawableId) {
      this.drawableId = drawableId;
    }
    
    
    
      
  }
Java Source Code List
